Scientific sessions


  • +W01: 2nd China-Korea Joint Workshop on Gas Hydrate
    Convener(s): Nengyou Wu, Dae-Gee Huh
    • A large number of major gas hydrate activities have occurred in Asia in recent years, particularly in China, Japan, Korea and India. China and Japan have conducted the successful gas production tests from hydrate deposits, Korea and India found the large deposits of potentially producible gas hydrate in Ulleung Basin, East Korea Sea and Indian Ocean. Asia has become the center of gas hydrate research community all over the world. Organized by China Geological Survey, China and Gas Hydrate R&D Organization, Korea, the China- Korea Joint Workshop on Gas Hydrate will be held by turns every two years in China and Korea, with Qingdao Institute of Marine Geology (QIMG), Guangzhou Marine Geological Survey (GMGS), Korea Institute of Geoscience and Mineral Resources (KIGAM), Korea Gas Corporation (KOGAS), Korea National Oil Corporation (KNOC), as the support institutes. The 1st Korea-China Joint Workshop on Gas Hydrate was held in Jeju Island, Korea in October 20-21, 2016. The 2nd China-Korea Joint Workshop on Gas Hydrate will be held in conjunction with ICAMG-9 in Shanghai in October 10-12, 2018. The proposed topics of this joint workshop will be gas hydrate fundamentals, hydrates in flow assurance, hydrates in nature (occurrence, assessment, geo-hazards, climate impact), gas recovery from hydrate deposits, technological applications and innovations. The 2nd China-Korea Joint Workshop on Gas Hydrate will be open to the international gas hydrate community. The maximum participants will be 100.
  • +W02: Particle Flux in the Oceans: Recent Progress and Future Perspectives
    Convener(s):Martin Wiesner, Zhifei Liu, Jianfang Chen, Venu Ittekkot
    • The rain of lithogenic and biogenically produced particles from the surface ocean to the deep sea determines the distribution of biogeochemical elements, sustains mesopelagic and bathypelagic life, provides the source of sediments at the ocean floor and, ultimately, contributes to controlling the Earth’s climate. Their decay and remineralization as they sink through the water column govern the balances of oxygen, nutrients and other trace constituents. Lithogenic particles involved lateral transport on the continental margin usually dominate settling processes along with deepwater circulation. Understanding the factors that impact the efficiency of this biological pump is important to predict how particle export will evolve in the future. As the settling particles carry a memory imprint of the atmospheric, continental and upper ocean environments in which they were produced, extracting this memory is critical to understand and reconstruct past climatic and oceanographic conditions and to predict future trends.
      Since the last workshop on material fluxes in the world oceans held 25 years ago in Hamburg, Germany, there has been considerable and rapid development of observational techniques and analytical methods for the quantification and modeling of particle fluxes, including particulate carbon, silica and related element fluxes through the water column and their sedimentary accumulation in relation to climate change. The dynamics of particle formation, sinking, remineralization, resuspension and/or sedimentation as a function of biological, physical and chemical forcing functions have been studied over variable time scales across the globe using moored, high-resolution time-series instrumentation, profiling floats/deep-sea drifters and other underwater technologies, sediment coring and state of the art laboratory techniques to improve our conceptual understanding of the processes regulating biogeochemical cycles. In particular, remote sensing has provided large-scale synoptic data sets enabling the extrapolation of regional studies to larger spatial and temporal scales, and linking atmospheric and surface ocean processes.
      The proposed workshop will bring together professional and scientific experts under research themes related to biogeochemistry, sedimentology, atmospheric sciences, oceanography, modeling, and remote sensing to outline the current state of scientific and technical knowledge. The goal is to establish an improved understanding of the processes controlling biogeochemical cycling, to assess climatic feedbacks associated with changes in the chemical and physical environments and to identify and delineate future research steps.
      The workshop will be organized into seven working themes: satellite observations, modeling, provenance/isotope studies, surface productivity/particle export, plankton ecology, transformations in the water column and at the water-sediment interface, and Anthropogenic contaminants (heavy metals/plastic).
  • +W03: GeoSummit Workshop on Coastal and Offshore Geology
    Convener(s): Se Won Chang, Ping Yin, Tomoyuki Sato, Huayan Gan
    • This will be the first international workshop on coastal and offshore geology co-hosted by KIGAM, CGS, and GSJ. This workshop was agreed by three organization at the technical session 2 of the 2nd GeoSummit on the 20th of June in 2017. This session will include the seamless coastal mapping projects, the serious coastal geo-hazards, and the ‘source to sink’ issues in the Yellow Sea and East China Sea by three countries. This session will also include the challenges of the survey technologies and suggested cooperation on the above themes.

Coastal and shelf marine geology

  • + S01: Marine Geology of Islands and Reefs
    Convener(s): Ying Wang, Chengdong Ge, Kefu Yu
    • Marginal Seas are the characteristic nature of the interactive zone between Continental Asia and the Pacific Ocean.
      The session of Marine Geology of Islands and Reefs just reflected the special environment、resources and related to the maritime boundary problems of the interactive zone.
      To exchange scientific research and through discussion on regional Marine Geology can be improved the understanding of the area nature and towards peaceful developing progress in the near future.
  • + S02: Neritic carbonate platform and peri-platform deepwater sedimentary processes in the tropical seas around Asia
    Convener(s): Cristian Betzler, Xavier Janson, Yongsheng Ma, Shiguo Wu
    • Since the late Cenozoic many carbonate platforms formed and developed in the tropical seas around Asia. Only a small number of these isolated carbonate platforms continue to grow to the present day, scattered as islands and reefs. Both the carbonate platforms with their coral reefs, and the related periplatform deposits can provide fundamental archives of past oceanographic, environmental, ecological and climatic conditions.
      Here we welcome contributions focused on understanding how intrinsic and extrinsic factors control the evolution of neritic carbonate platforms. Through this session, we are aiming to gather a broad scientific community dealing with neritic carbonates and peri-platform sedimentary processes in order to better understand the processes and products of carbonate accumulations, including in-situ and allochthonous carbonate deposits and their implications for the understanding of sedimentary systems, sedimentary basins, paleo-environment evolution, paleo-climate changes and sea-level variations in tropical seas around Asia.
  • + S03: World's River Deltas: research progress and perspectives
    Convener(s): Yoshiki Saito, Steve Goodbred, Zhongyuan Chen
    • The world's major river deltas are the vital sites for human development, in context of global food security, commerce, energy production, and transportation. However, many of these deltaic regions have been rapidly in degradation, due to a number of natural and anthropogenic factors, including relative sea level rise, climate warming, riverine sediment reduction, water diversion, reservoir construction, and large river-coastal engineering. Over the past decades, the world’s mega-deltas have experienced rapid increase in population and urbanization. The anthropogenic activities have largely interfered with delta-forming processes and, in return, the altered deltaic forming processes are affecting humans, presenting a dynamically coupled natural-human system. This session provides a platform for coastal scientists, addressing issues, and latest research achievements on the world’s mega-deltas as a complex dynamic setting at various scales. We encourage submissions based on field observation, modeling, and synthetic studies concerning deltaic sedimentology, hydro-geomorphology, sediment transport, land-sea interaction, and particularly, population forcings, and associated policy making in the world's vulnerable deltas.
  • + S04: Coastal dynamic and sea level change over time scales
    Convener(s): Yongqiang Zong, Fengling Yu
    • The vulnerability of coasts and coastal communities to climate changes that occur in hours to millennia is widely recognized. This is coincided with rapid economic development along Asian coasts. As a result, coastal communities and their economic investment are increasingly under threat of coastal hazards. In order to reduce the risk to human life and infrastructure from future coastal changes, new investigations are required. These include investigations on natural and human drivers for global and regional sea level change, risk of coastal floods and coastal erosion, as well as changes in coastal ecosystems. This session will provide opportunities for discussion on three themes: catastrophic events, sea-level change in different timescales and coastal change, aiming to gain better understanding of the interactions between various drivers and the potential impacts of future global change on human communities in Asian coasts.
  • + S05: Quaternary shelf sand bodies in Asia and elsewhere: Processes and products
    Convener(s): Daidu Fan, Serge Berné, Ping Ying, Yoshiki Saito
    • This session is dedicated to memory of Doctor Liu Zhenxia, who devoted a large part of her professional life to the study of large sand bodies in the China Seas, and who passed away in October, 2017.
      Shelf sand bodies are ubiquitous deposits at the crossroads of important scientific, environmental and economical questions. During the last two decades, important progresses have been accomplished in the field of mapping these deposits, and investigating their architecture in three dimensions through high-resolution seismics and borehole data, both on recent and buried (inherited from past Quaternary glacio-eustatic cycles) cases. New light has also been shed on the modern processes that govern their formation or evolution, through in situ monitoring, gliders, AUV and ROV, as well as physical or numerical modelling. Some of the important scientific questions that arise concern the chronology and processes of formation of these sand bodies, the relative influence of inherited versus present-day processes, the quantification and prediction of their migration rates, the potential use of buried sand bodies as dipsticks of sea-level changes and analogues for hydrocarbon reservoirs. Societal implications of these studies include the use of sand bodies as sources of aggregates for beach refurbishment or construction, and the possible conflicts of interest with fishing activities and preservation of marine habitats. In some contexts, active sand bodies may also represent navigational hazards that require continuous monitoring, or appropriate modelling, that reveals still difficult to apply in an operational manner.
      Asian Seas provide a broad spectrum of physical, sedimentological and geomorphological contexts, with examples of extremely active sand bodies as well as buried examples that are already analogues to the rock record. Presentations dealing with field data, as well as physical or numerical modelling of large sand bodies in the Asian Seas are welcome, including both theoretical or applied aspects. Presentations of examples and lessons from studies on other shelves around the world are also encouraged.
  • + S06: Nearshore Dynamic Processes and Hazards under Coastal Storms and Influence of Human Activities
    Convener(s): Bob Z You, Yongshen Wu, Qinghe Zhang, Jiawen Sun
    • Coastal storms/typhoons/cyclones and human activities are two main drivers causing coastal erosion problem in many coastal countries over the world. In the last few decades, human activities are even overtaking natural forces to cause much more impacts on our invaluable coasts, especially on the coast of China. Natural coastlines have been rapidly disappearing and being replaced by man-mad artificial ones that are excessively protected by seawall or concrete armor units. The coast of China has been converted more than half of its natural coastline to the artificial one, and several large-scale artificial sandy beaches have been or being built on rocky or muddy coasts. Coastal storm is another main driver resulting in major coastal hazards such as coastal inundation and erosion. Typhoons-induced high surge, large waves, and storm erosion are major coastal hazards on the coast of China, causing annual damage of about US $3 billion to the coastal economy and annual losses of 256 people lives based on the most recent data.
      In this session, we warmly welcome contributions from relevant discipline that examine topics on advances and developments in the following or related areas: nearshore hydrodynamics such as wave breaking and swash zone dynamics and coastal wave boundary layer; nearshore sediment dynamics especially in swash and surf zones; land reclamation and beach nourishment; coastal hazards and mitigation options, coastal management, regulations and policies, and other relevant research areas.
  • + S07: Review of Late Pleistocene-Holocene Sequence stratigraphy on the South East Vietnam Shelf
    Convener(s): Nguyen TrungThanh, Do HuyCuong, Bui Viet Dung,Stattegger, Tran Nghi, Tran Tuan Dung, Mai Duc Dong
    • The South East Vietnam Shelf belongs to the South China Sea as known the typical margin sea and is characterized by strong land - ocean interaction and sedimentary facies changes with sea level fluctuations. In this study, Late Pleistocene-Holocene sequence stratigraphy and sedimentary facies on the continental shelf were reviewed by using high-resolution seismic data and combining dating and sedimentary data. Sequence stratigraphy consists of four system tracts such as the forced regressive system tracts, the lowstand system tracts, the trangressive system tracts and the highstand system tracts. This study confirms the occurrence of paleo-river channels that define three major river systems working on the continental shelf during the last glacial maximum consisting of the Dongnai paleo-river, Mekong paleo-river, and the local paleo-rivers around the Camau Pennisular.
  • + S08: Anthropocene Coasts under Global Changes
    Convener(s): Shu Gao, Ian Townend, Katsuto Uehara, HeeJun Lee
    • Estuaries and Coasts, being the land-ocean interface, form one of the typical critical zones on the earth surface, where substantial material and energy exchanges take place. The sedimentary and geomorphological evolution processes within estuaries and coasts are the consequence of combined impacts of natural factors and anthropogenic activities. Massive sedimentary records are available, including sea level changes, shelf circulations, thermohaline variations, geochemical cycles, biological productivities, catchment changes, sediment supplies and human activities. Those records provide the possibility to understand the system at an inter-annual scale or even better resolutions. The interpretation of sedimentary records requires the connection between the dynamic processes and long-term sedimentary products, which could be accomplished by the multi-disciplinary integration of sediment dynamics, stratigraphy and ecosystem dynamics. The topics of this session include but not limited to the followings: 1) environmental evolution of estuaries and coasts under anthropogenic impacts; 2) coastal ecosystem: products, service value and protection; 3) infrastructure of harbors and ports; 4) planning and construction of coastal urban clusters; 5) economic development of coastal regions; 6) coastal space Utilization; 7) storm surges and natural hazards; and 8) data collection technology.

Source-to-sink study in Asian continental margins

  • + S09: Sediment Gravity Flows: Processes, Products, and Implications to Resource Explorations
    Convener(s): Jingping Xu, Guangfa Zhong, Xinnong Xie, Shiguo Wu
    • Sediment gravity flows, especially turbidity currents, comprise one of the most important mechanisms of sediment transport and deposition in deep-water environments. Their deposits contain important archives of Earth’s geological past, and constitute potential reservoirs of natural resources (oil and gas). During the past decades, a variety of methods and techniques from different disciplines have been adopted to investigate sediment gravity flows and associated deposits, from field measurements, to geological, geophysical and geochemical analysis of the sedimentary records, and to physical and numerical modeling of the flow processes, among others. Thanks to those studies, our knowledge on sediment gravity flows and associated deposits has substantially expanded. In this session, we invite contributions on processes, products, and resource exploration significance of sediment gravity flows. Topics may include, but not limited to:
      - Direct measurements of sediment gravity flows
      - Physical and numerical modeling of sediment gravity flows
      - Characterization of sediment gravity flows and associated deposits using outcrop, core, bathymetric, well-logging, and seismic data, among others
      - Applications in engineering and resource exploration (petroleum, gas hydrate, and metal deposits) - case studies
  • + S10: Sediment Dynamics in the River Plume Regime: Coupling between Physical Process and Geochemical Response
    Convener(s): James T. Liu, Janping Gan, Hui Wu, Daidu Fan
    • River plume is the most important mechanism by which fluvial discharge with its dissolved and particulate content is dispersed on the continental shelf. The physics of the river plume dynamics and the complex interactions between the river plume and other physical processes, such as the wind- and buoyancy-driven current remain as active research topic. These processes reflect land-sea interactions in the physical realm, they in turn, affect sedimentation, bio-geochemical processes, and ecological changes in the coastal environment. In this special session we hope to present the great diversity of river-sea systems in Asia, their processes and records. We emphasize on the coupling between physical processes and geochemical processes in various river plume regimes and their records. We welcome findings of observational work from different platforms (shipboard and remotely sensed, etc.) and theoretical and modeling work in the laboratory and numerical simulations.
  • + S11: Interaction of tectonic-climate change with weathering and erosion processes in Asian continental margin
    Convener(s): Peter Clift, Christian France-Lanord, Shiming Wan
    • Continental erosion and weathering are the key processes that shape Earth’s landscape, regulate atmospheric CO2, and control the delivery of sediments and solutes to the ocean, affecting global climate over geological time scales. Meanwhile, temperature, precipitation, and physical erosion which are also linked to tectonic uplift are critical factors influencing silicate weathering. Weathering and erosion processes strongly affect the mineralogy and geochemistry of sediments in soil profiles. These signatures are ultimately transferred to the sedimentary record in the continental margins via rivers and oceanic currents, thus providing a useful tool for quantifying source area weathering conditions. In this session, we will focus on the Asian continental margins, which represent the primary sediment sinks for material eroded from the Himalayan-Tibetan Plateau region, which has significantly influenced the global weathering budget during the Cenozoic. The start of collision between India and Eurasia at ~50-60 Ma drove the progressive uplift of the Himalaya and Tibetan Plateau, forcing the reorganization of the great rivers in Asia into the pattern that we now observe and driving the intensification of the Asian monsoon systems. Collectively these processes have formed the largest sediment source to sink system in the world. We welcome contributions about the interactions between tectonic, climate change and weathering and erosion using sediment records from both the East Asian and South Asian marginal seas on various time scales (i.e., tectonic, orbital and millennium time scales).
  • + S12: Sediment source-to-sink processes and environmental records in Asian continental margins
    Convener(s): Xuefa Shi, Steven Kuehl, Dhong-Il Lim, Shouye Yang, Sergey Gorbarenko
    • Asian continental margins foster typical river-dominated marginal seas with active sediment source-to-sink processes and strong land-sea interactions at variable spatial and temporal scales. Two fluvial sediment routing systems, i.e. large rivers vs. small mountainous rivers, are characterized by different weathering and sediment transport mechanisms, but both significantly influence the sedimentary process and biogeochemical cycle in Asian marginal seas. In this session, we aim at addressing topics such as: 1) controls on river fluxes, geochemical compositions and sediment transport including natural driving and anthropogenic impacts; 2) fates and depositional processes of fluvial sediments in coastal and shelf areas in relation to the changes of monsoon climate, sea level, oceanic circulation and occurrence of various events (e.g. volcanic eruption and earthquake). We welcome submissions based on field, experimental and modeling studies.
  • + S13: Fluvio-Marine Landscapes, Climate and Past Civilizations
    Convener(s): Liviu Giosan, Mark Macklin, Bill Ryan, Zhanghua Wang
    • Ancient civilizations preferentially evolved near water: rivers, estuaries and deltas, environments that are extremely productive and provide easy access for trade. However, these highly dynamic landscapes are very sensitive to climate change and human societies depending on them experienced major reorganizations over the past 10,000 years.
      Neolithic farmers on the Black Sea continental shelf migrated to keep up with the sea level rise, the civilizations of China, Egypt, India, and Mesopotamia depended on the vagaries of large rivers and their deltas, while the ancient Greek and Roman empires built on climate-sensitive maritime trade. All their stories of social and economic development followed by major reorganizations for survival hold lessons for our modern societies.
      Marine geology and geophysics is the key to unlock these stories that are literally buried under mud on our coasts and our shelves. We invite field- and/or modeling-based contributions that address but are not limited to fluvial-marine reorganizations that affected past civilizations such as sea level changes, river and coastal floods, deltaic avulsions, and ecohydrological restructuring. We particularly encourage multidisciplinary submissions spanning the whole range of the marine geology and geophysics in concert with geomorphology, archaeology, hydrology and ecology.
  • + S14: When and how clastic detritusare transported from shelf-edge staging areasinto deep-waterareas: From a source-to-sink perspective
    Convener(s): Chenglin Gong, RonaldJ. Steel, Changsong Lin
    • The source-to-sink delivery of terrigenous sediments from shelf-edge staging areas into deep-water areas is scientifically important, since it records the dynamic interaction between fluvial or deltaic processes controlled by climate and tectonics and marine processes controlled by eustasy, subsistence, ocean currents, and gravitational processes. Moreover, source-to-sink sediment dispersal to deepwater is practically significant, since it gave rise to largest sediment accumulations (i.e., submarine fans) on the planet, which host approximately 35% of all giant field discoveries. How and when sediment moves from terrestrial sources to deep-water sinks is, thus, a significant area of research in the stratigraphic community.
      The source-to-sink holistic approach represent a new generation of basin studies. It is now widely used to explore when and how the clastic detritus are transferred between different segments of a sediment-routing system, which can be divided into two discrete segments (i.e., terrestrial to shallow-marine and submarine segments). A better understanding when and how clastic detritus are partitioned and preserved along the submarine segment of a given source-to-sink sediment-routing system, therefore, would provide vital insights into: (i) better understanding how deep-water systems function as a system and (ii) marking subsurface predictions of the accumulations of coarse-grained terrigenous sediment (i.e., reservoirs) in areas of little or lacking data.
      Although significant work and progresses have been made on submarine segments of source-to-sink sediment-routing systems in recent years, there still remains significant uncertainty and debate regarding when and how clastic detritus are transported from shelf-edge deltas into deep-water areas. Therefore, the proposed session will undoubtedly facilitate the open and lively discussion on a deeper and better understanding of: (i) the timing and amplitude of the delivery of terrestrial sediments (especially coarse-grained clasts, into deep-water areas and (ii) the dynamic and complex interplay of the multiple geological factors affecting and governing the depositional continuum from shelf-margin staging areas down to deep-water areas across Earth’s continental margins.
  • + S15: Deep-Sea Sedimentary Processes: from Observations to Geological Records
    Convener(s): Zhifei Liu, Benjamin Kneller, Gert J. de Lange, Yanwei Zhang
    • Deep-sea sediments are amongst the most important records of Earth surface evolution. A series of important discoveries, including global tectonics, climate change, and environmental evolution events, were first obtained or confirmed from deep-sea sediment studies. Deep-sea sedimentary research developed rapidly in recent years: on the one hand, through field observations and simulation, revealing processes and mechanisms of particle transport and deposition in the deep-sea environment; on the other hand, through paleoenvironmental studies of deepwater sediments, elucidating long-term regional and global tectonic, climatic and environmental evolution. The integrative approach based on deep-sea sediments is at the forefront of Earth system science studies.
      This session aims to provide an exchange platform on deep-sea sedimentary (physical, chemical, and biological) processes including field observations, numerical simulation, and geological records (e.g., sediment cores on marginal seas and open oceans, marine sediment profiles on land). We encourage contributions on tectonic and environmental evolution, and on ancient-modern integration of deep-sea sedimentary observations and processes.

Paleoceanography and paleoenvironmental changes

  • + S16: Neogene Paleoceanographic and Paleoclimate Variability in the Indo-Pacific Warm Pool
    Convener(s): Yair Rosenthal, Jun Tian, Haowen Dang
    • As the major source of heat and moisture to the atmosphere, the Western Pacific Warm Pool (WPWP), plays a critical role in climate. To date, the scarcity of long, continuous records from this region has limited our understanding of the IPWP evolution throughout the Neogene in response to tectonic adjustments in the position of the surrounding landmasses, changes in ocean circulation and relation to long-term climate deterioration since the early Miocene. However, recent research efforts, including several IODP expeditions focusing on the IPWP, provide new opportunities to document and understand the complex oceanographic and paleoclimatic history of this region at different time scales, particularly in relation to regional and global monsoon systems. This session seeks contributions from researchers studying the geological, oceanographic and terrestrial history of the region and its implications to the evolution of Neogene regional and global climate. We also encourage submission from modelers that the session will provide a platform for future broad interdisciplinary and international collaborations.
  • + S17: Late Cenozoic ocean circulation,carbon cycle, and climate change in the western Pacific marginal seas
    Convener(s): Jun Tian, Jimin Yu, Zhonghui Liu
    • The western Pacific Ocean is characterized by a series of NE-SW marginal seas, whose formation was driven by the tectonic evolution of Pacific, Australia, and Indian plates. Deep-sea circulation changes in these marginal seas have a great potential to reveal tectonic evolutions at key time intervals. The associated changes in carbonate deposition might have played an important role in affecting past atmospheric CO2 concentration and hence the global climate. This session seeks contributions studying the geological, paleoceanographic, and paleoclimatic history of the western Pacific region using various proxies to reconstruct past ocean circulation, ocean carbon chemistry, and other aspects of the climate system. We also welcome contributions using numerical models of different complexities including box models, intermediate-complexity models, and Earth System Models. This session aims to establish a platform for future broader interdisciplinary collaborations to deepen our understanding of the western Pacific marginal sea history during the Late Cenozoic.
  • + S18: Burial of organic carbon in the coastal margin under a changing world
    Convener(s): Limin Hu, Peng Yao, Thomas S. Bianchi
    • The sedimentary environment of coastal margins serves as an important component of the source to sink sedimentary systems, which are important settings of carbon repository and cycling between terrestrial and marine reservoirs, and as the primary locations for organic carbon (OC) burial on Earth. Over the past century, the carbon sequestration in the coastal ocean is influenced by coupling factors from the climate change and anthropogenic impact, (e.g., global warming, damming and coastal eutrophication). Therefore, it is essential to understand the state and future of OC burial in the coastal ocean, and the impacts, mechanisms and historical records of this alteration on the OC cycle and biogeochemical processes within the source-to-sink sedimentary systems, particularly in the context of global change. In this session, we encourage the possible topics include: transport of OC across the terrestrial-marine interface coupling with sediment source-to-sink process, flux of sequestration and preservation mechanism of OC in sediments with linkages between organic matter dynamics and nutrient cycling, sediment OC records and age determinations, biomarker and isotopic studies, as well as modeling approaches to carbon dynamics.
  • + S19: Paleoceanographic and climatic evolution and variability recorded in marginal and deep-sea western Pacific sediments; linking land-ocean in present and past
    Convener(s): Michael Sarnthein, Zhimin Jian, Gert J de Lange
    • (this session is to commemorate the onset of International Conferences on Asian Marine Geology (ICAMG) 30 years ago, and is in honour of founding fathers Pinxian Wang and Asahiko Tairo )
      Analyzing and interpreting marginal and deep-sea sediment records is vital to better understand the paleoceanographic response to climate evolution, and subsequently to bridge modern and paleo-studies of associated marine processes. These include biogeochemical processes, that result in recording but may also lead to altering primary signals, in water column and sediments.
      To understand the global functioning of the ocean in present, past and future, we need to understand all of its major components. The western Pacific Ocean is a dominant module therein, with potential important regional and global paleoceanographic/climatic records that have long remained rather under-exploited. These records may reveal patterns of deep-water circulation and sedimentation, phytoplankton community structure, dynamic interactions and exchange in bacteria communities, atmospheric circulation and surface current systems. The western Pacific in this respect is of eminent global significance, with its important land-ocean interactions, major atmospheric circulation patterns, and the changing outflow intensity through the Indonesian Gateway system with changes in sea level. In recent years major international as well as national efforts have also revealed important orbital forcing related features in low-latitude paleoceanographic studies that are relevant for the Global Earth System. Besides the importance of different Milankovitch cycles (precession, obliquity and eccentricity) and the relationship with climate variability at long time-scales, increasing evidence emerges towards variability at millennial-scale. Another often ignored but important aspect is the role of marginal basins in the regional and global ocean circulation including land-ocean interactions.
      In this session all contributions on paleoceanographic and climatic variability are welcomed but in particular those integrating paleo-records with modern processes and observations, aiming to achieve high-resolution paleoceanographic reconstructions.
  • + S20: Testing the proxies for ocean productivity from centennial to longer timescales
    Convener(s): Yama Dixit, Zhifei Liu, Xianfeng Wang
    • Ocean productivity plays a major role in controlling the partitioning of carbon between the ocean and atmosphere and therefore can influence climate by altering the atmospheric concentration of carbon dioxide. In this context, reconstructing paleoproductivity using various proxies and calibrating them with modern relationship will provide insights into the changes in ocean biogeochemical cycles and their correspondence to Earth’s climate. The productivity changes in monsoonal Asia are particularly important in the global ocean biological cycles via input of freshwater fully laden with nutrients and thus call for improved reconstructions. A large variety of methods have been applied to reconstruct productivity, including carbon isotopes, organic matter/phosphorus content, carbonate and opal contents, microfossil assemblage, barium/barite accumulation, elemental ratios (e.g., Ba/Al, Si/Al) and organic biomarkers. Some of them result only in qualitative estimates while others are quantitative. Moreover, each has associated assumptions and limitations and should be used with caution. Therefore, to get reliable estimates of productivity changes, intercomparison of various productivity proxy and model studies focusing on the same geographical region is vital. In this session, we invite contributions from proxy records and model simulations for past and modern changes in the ocean productivity in Asia in response to changing carbon dioxide levels across various timescales.
  • + S21: Low latitude Indo-Pacific marginal seas: variabilities in paleoclimatology and paleoceanography and their implications
    Convener(s): Sanmin Hyun, Rina Zurida
    • Low latitude Indo-Pacific marginal sea holds key processes of ocean changes as well as climatic variability. In particular, Asian and Indian monsoon are an important component of the world’s climatic system that influences on economic activities and cultural variations of Asian peoples. Detailed presentation and discussion on the variabilities of paleoclimatology and paleoclimatology of low latitude Indo-Pacific area may provide information on paleoclimatic and paleoceanographic evolution for the past Pleistocene and Holocene periods.

  • + S22: Land-sea interaction processes and paleoenvironmental evolutionin the joining area of Indian-Pacific Ocean
    Convener(s): CheAbd.Rahim Bin Mohamed, Shengfa Liu, Rina Zuraida, Narumol Kornkanitnan
    • Joining area of Indian-Pacific Oceanlocated in the southern of the Himalayas, strong weathering-erosion processes make it to an ideal area for land-sea interaction process andpaleoenvironmental evolutionresearch. Large quantity of important scientific question, such as warming poor, monsoon, Indonesia throughflow (ITF), have a kind sedimentary records in the regions and also represent well regional response to global climate changes. In this session, we aim at addressing topics such as: 1) modern hydrographic condition, sedimentary environment and land-sea interaction processes; 2) seasonal varies of marine environment and its controls onland-sea interaction processes; 3) sedimentary record on monsoon and precipitation at different time scales, and their response to source-to-sink processes, sea level and oceanic circulation. We welcome submissions based on field, experimental and modeling studies.

Marine tectonics, geophysics and geoharzards

  • + S23: Structure, magmatism and dynamics of marginal seas in Western Pacific
    Convener(s): Tianyao Hao, Sanzhong Li, Weiwei Ding, Zhen Sun
    • One of the most spectacular features of the Western Pacific is the widely distributed marginal seas. Their structure, magmatism and dynamics are important scientific issues but still in mysteries. Great efforts have been made in past decades to better understand their dynamic mechanism, and further acknowledge the global dynamic system, including geological and geophysical observations, IODP drilling expeditions, and analogue modeling works. In order to summarize these scattered efforts and push forward more collaboration on scientific frontiers, this session aim to solicit contributions on all relevant studies, including but not limited to the tectono-sedimentary structures, lithological structures, magmatism and mantle plume/hotspot, kinematic and dynamic studies. Efforts on geophysical observation, geodesy, seismo-tomography inversion, ODP/IODP drilling results, and physical or numerical modeling experiments are all welcome.
  • + S24: Seafloor sediment acoustics
    Convener(s): Baohua Liu, Gil Young Kim, Guangming Kan, Guanbao Li
    • The seafloor sediment acoustic studies focus on the relationships between sediment acoustic properties and physical properties, sedimentary environment, and the acoustic detection methods to obtain the sedimentary textures and sediment types. Ever since 21st century, the sediment acoustic study has became a new cross-subject, which combines the marine geology and ocean acoustic. The major study topics of sediment acoustic consist of the acoustic properties measurement methods, the distribution of sediment acoustic properties, the geoacoustic models, the seafloor acoustic scatterings, the seafloor reverberations, the geoacoustic inversions, the sediment classifications, and the acoustic detection techniques of sediment properties, etc. The sediment acoustic have been studied by many research institutions, including APL of Washington University, the Georgia Institute of Technology, the Scripps Institution of Oceanography, the Korea Institute of Geoscience & Mineral Resources, the Pukyong National University, the Kochi University, etc. Many Chinese research institutions under State Oceanic Administration, Chinese Academy of Sciences, and some universities in China also have carried out the sediment acoustic studies from multiple angles. The sediment acoustic study findings have been applied to some fields, including the ocean acoustics, the marine geology, the seabed mineral resources survey, and the ocean engineering, etc.
  • + S25: Seafloor Failures: Triggering Mechanisms, Processes and Sedimentological Records
    Convener(s): Chih-Chieh Su, Jing-Yi Lin, Yi-Ching Yeh, Ho-Han Hsu
    • Seafloor failures are controlled by long-term geological preconditioning factors (e.g. depositional environments, geotechnical properties of sediments, mass movement history and long-term climate change) and short-term triggering mechanisms (e.g. slope oversteepening, seismic loading, storm-wave loading, gas hydrate dissociation, gas charging, seepage, glacial loading and volcanic island processes). It can devastate offshore infrastructures and further triggering tsunamis which caused widespread damages and numerous fatalities in coastal communities. Thus, understanding its geological constraints, triggering mechanisms, processes are of the highest priorities on submarine geohazard mitigation. The application of state-of-the-art marine geophysical, sedimentological survey technology, and engineering approaches have opened up new possibilities for improving our understanding of potential seafloor instability. This session hence welcomes contributions from different disciplines of earth sciences and we expected to stimulate more multidisciplinary researches on seafloor instability related issues.
  • + S26: Marine Geohazards
    Convener(s): Yu Huang, Wuwei Mao
    • Along with the rapid development of marine science and technology, the exploration and development of offshore oil and gas resources are accelerating and the marine engineering facilities are increasing. Potential marine geohazards pose great threats to the safety of submarine pipelines, cables and offshore structures, and may even cause tsunami disasters and threaten the life and property in offshore areas. It is therefore of crucial importance to ensure the safety of marine engineering for sustainable development of marine science and economy.
      This session will discuss the scientific issues and related research methods on marine geohazards. The aim of this session is to bring together researchers and practitioners working on marine engineering to share their experiences and latest research results, and try to facilitate constructive principles and ideas to guild the study for a period of time in the future. Hence, we welcome contributions that report on progress in innovations and integrated approaches, especially those of essentially trans-disciplinary, regarding various aspects of marine geohazards. Recommended topics include but are not limited to:
      • Case study of geohazard related to marine engineering
      • Submarine landslide, earthquake tsunami, sea water intrusion, etc.
      • New technologies toward marine geohazards survey and coastal protection
      • Impact of marine geohazards on marine engineering facilities
      • Other marine geohazards

Submarine resources

  • + S27: Advances in natural hydrate systems and methane seeps in marine settings
    Convener(s): Dong Feng, Min Luo, Xiqiu Han, Haibin Song
    • Significant progress has been made in recent years on natural gas hydrate and methane seep systems along the Asian continental margins. These discoveries improve our understanding of the role of methane (hydrate) in the Earth system. This session aims to integrate the latest advances on our understanding the role of gas hydrates as an energy resource, geohazard, and as an agent for climate change. We seek to combine multi-disciplinary research topics to assess the current baseline of methane seepage to the global oceans and its environmental impact. We welcome contributions including, but not limited to, geophysical surveys of the subsurface sediments, regional mapping of gas plumes, identifying of source gases and hydrate and their fate in the water column, in-situ temporal observations of seep and hydrate systems, sediment (pore water) and carbonate geochemistry, as well as (micro-)biological studies of seep-driven chemosynthetic ecosystems.
  • + S28: Seabed Mineral Resources: Recent Achievements and Challenges
    Convener(s): Sang-Joon Pak,Wonnyon Kim, Jonguk Kim
    • The global ocean covers 71% of the Earth’s surface and its seabed contains abundant metal resources including polymetallic nodules, Co-rich crust, seafloor massive sulfides and REE-bearing sediments. However, the detection of seabed mineral resources in the vast oceans as well as resource generation in the deep sea are still global challenges. In order to surpass these barriers and aquire better understandings of seabed resources, we demand new concepts and technologies. Co-rich crust needs cost- and time-effective methods to measure crust thickness under the seafloor. To exploit polymetallic nodules, unsolidified REE-bearing sediments are now considered to be a value-adding commodity. The estimation of seafloor massive sulfides using 3D geophysical techniques, which are newly adapted from land-based exploration is now under consideration. Of equal importance is the development of a system of regional and local environmental baseline assessment and of appropriate methods and techniques to monitor them. In this session, we will focus on not only the recent exploration and research results among the aforementioned seabed mineral resources but also on environmental issues relating to exploration and exploitation. Major topics that the presenters introduce will be the following: the geological factors controlling the formation, distribution and preservation of seabed mineral resources; the multi-scale observations that can be used to predict past, present and possibly future deposit formation; the influence of geological setting, basement lithology, structure and tectonics to generate and preserve deposits; the development and application of new technologies to explore for inactive sulfide deposits including those buried by sediment or lava; and lastly, an environmental baseline study related to geological processes. This session will strive to our knowledge of seabed mineral resources around the world and provide a venue for collaboration among regional research groups in Asia.

Climate changes in Polar regions

  • + S29: Arctic gateway connecting the North Atlantic and North Pacific Oceans
    Convener(s): Rujian Wang, Leonid Polyak, Seung-Il Nam, Masanobu Yamamoto
    • Significant sea ice reduction in the Arctic Ocean in recent years exerts significant climate perturbations in northern latitude areas. Meanwhile, the reducing sea ice facilitates the exploration of the Arctic Ocean. The Arctic Ocean represents a key environmental end member that modulate the climate such as surface albedo, global overturning circulation and carbon cycle. The Arctic Ocean and surrounding areas were subject to rapid and dramatic change over historic and geologic time scales. Melt water discharge from the Arctic Ocean to the North Atlantic significantly affect the production of the North Atlantic Deep Water. The glacial-interglacial waxing and waning of circum-Arctic ice sheets not only change the geography and morphology of northern high latitude regions, but also changes the circulation and sedimentation pattern in the Arctic Ocean; changes the sea level which has great impact on the opening and closure of the Bering Strait, the only passage for Arctic-Pacific water exchange; and influences climate variability in northern latitude regions and beyond via atmospheric and oceanic tele-connections. We invite contributions of studies on the Arctic and sub-Arctic North Pacific and North Atlantic Oceans from different time scale, in order to advance our knowledge and understanding the role of the Arctic Ocean in the global climate system.

The 50 years of Ocean Drilling and Asian Marine Geology

  • + S30: The 50 years of Ocean Drilling and Asian Marine Geology
    Convener(s): Yasuhiro Yamada, Gil Young Kim, Zhimin Jian
    • 2018 is the 50-anniversary year for the scientific ocean drilling program, which has been contributed to the current understanding of Asian marine geology. This session outlines the achievements in the past cruises, on-going scientific projects and future perspectives of the program.

S31: Marine geoscience education and outreach

S32: General sessions

    30th anniversary of ICAMG

In 1988, the first ICAMG was held in Shanghai. During the ICAMG-9, a specific commemorative activity for 30th anniversary of ICAMG will be held. We warmly welcome all participants to join us and share your experiences with ICAMG during the last thirty years. Please send the relating materials (e.g. photos, posters) to the meeting organization.

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