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Information on Symposia per Science Theme





Theme No.

Theme Title

Number of Symposia proposed

Symposia Title

Symposia Conveners

Biographical sketch of the Conveners

Keywords

Abstract

5

Ancient and Modern Coasts and Continental Margins


Prof. Subir Sarkar

ssarkar@geology.jdvu.ac.in


Prof. B. N. Nath

nagendernath@yahoo.com


Prof. Peter D. Clift (USA)

pclift@lsu.edu

6

Advances in the Extensional Tectonics of Continental Margins

Sascha Brune (GFZ Potsdam, brune@gfz-potsdam.de

(Germany)


Marta Péres-Gussinyé, (Germany)


Zhen Sun

(France)


Anne Briais (France)

1. 2006-2012 – PhD in Geophysics (graduated 2009) and Postdoc at GFZ Potsdam

2013-2015 - Postdoc at University of Sydney

since 2016 – Helmholtz Young Investigators Group Leader at GFZ Potsdam


2. 1996-2008 – PhD, Postdoc, and Re¬search fel¬low at Kiel, Oxford, and Barcelona

2009-2015 – Lecturer, Senior Lecturer, and Reader at Royal Hol¬lo¬way Col-lege, London

since 2015 - Full Pro¬fessor for Geo¬dy¬nam¬ics, MARUM/Uni¬versity of Bre¬men


3. 1997-2004– PhD (graduated 2000) and Postdoc at Guangzhou Institute of Geochemistry

Since 2000–South China Sea Institute of Oceanology, Professor and group leader


4. 1995 – PhD in Geology, ETH Zurich

1995-2003 – Postdoc in Copenhagen, Zurich, and Maître de Conférence in Strasbourg

since 2003 – Professor for Tectonics at the Institute de Physique du Globe at the University of Strasbourg


5. 1989 – Phd in Tectonics and Geodynamics, IPGP Paris

since 1996 – Professor at CNRS Touloue

Rifted continental margins, Tectonics, Imaging, Modelling

Rifted margin segments feature a large structural variety in terms of general architecture, distribution of surface strain, crustal and lithospheric thinning in time and space, as well as the amount of sedimentation, magmatism and serpentinisation. It is clear that rift evolution is governed by the interplay of rheological configuration, tectonic inheritance, melting tectono-magmatic interaction, rift velocity, extension obliquity as well as surface processes and climate interaction, but the relative importance of these controls differs between individual margins. This symposium will address new data sets and methodologies that advance our understanding about the structure and dynamics of rift margin formation.

Carbonate Sedimentation at Continental Margins

Christian Betzler, christian.betzler@uni-hamburg.de;

(Germany)


Gregor P. Eberli,

(USA)


Jody Webster,

(Australia)

1. PhD from University of Tübingen, Professor in Hamburg since 2000, working in carbonate sedimentology and stratigraphy.

2. PhD from Swiss Institute of Technology (ETH) Switzerland. Since 1991, Professor in the Department of Marine Geosciences at the University of Miami, USA.

3. Works in School of Geosciences, Geocoastal Research Group , Research interests include coral reef and carbonate platform systems, both modern and ancient, and their associated sedimentary systems;

carbonates, sea level, slope processes, currents

Carbonate sediments mainly form in the shallow water realms along the low latitude shelves of oceans, but also are important elements of some high latitude continental margins. Whereas the basic understanding of these systems has been established several decades ago, marine geological research such as high-resolution seafloor mapping, high resolution seismic acquisition, and sediment sampling has added considerable knowledge regarding the sedimentary dynamics and stratigraphy of these deposits. In particular, processes influencing their slope and adjacent basin can now be investigated in great detail. This symposium aims to bring together carbonate sedimentologists and stratigraphers working in modern and ancient carbonates to discuss about the recent developments in carbonate sedimentology. Aspects such as dynamics at slopes of carbonate shelves, past environmental changes in carbonates, and carbonate sediment in source to sink system will be in the focus of this symposium.

Environmental Record of Margins – Ancient Records of Continental Conditions

1) Selvaraj Kandasamy,

selvaraj@xmu.edu.cn

(China)


2) Prof. Dr. Shouye Yang,

(China)


1. Specialised in sediment geochemistry, applying geochemical and isotopic data/proxies to investigate elemental cycles and earth surface processes and their link with Earth’s climate on different timescales.


2. Professor at Tongji University, China. Research interests: (i). Sediment geochemistry of major rivers and marginal seas in East Asia with emphases on sediment source-to-sink study; (ii) Quaternary geology and paleoenvironmental changes in East China and marginal seas; (iii) Weathering processes in the drainage basins and chemical fluxes into East Asian marginal seas.

Sedimentary records, Continental margins, Geochemical and biotic proxies

Global continental margins, including the continental shelf, slope and rise, occupy ca. 21% of the total oceanic area. Nonetheless, these regions contain the majority of land-derived sediments and thus preserve ancient land climate connection linkages in the ocean margins facilitating the reconstruction of continental scale climate. Terrigenous sediments have undergone differential rates of earth surface processes and other elemental exchanges between and among atmosphere, lithosphere and biosphere on diverse timescales prior to supplying to the ocean margins. They contain a variety of inorganic and organic elements and their isotopes; all of them carry precise signals of continental scale processes, which are mostly climate-driven. Given the importance of margin sediments to rebuild continental processes, the symposium invites abstracts focusing on highly resolved sedimentary records of ocean margins around the Globe with a special emphasis on the Indo-Pacific margin.

Gas hydrate Systems on Continental Margins and associated Geo-hazards

Dr. Pawan Dewangan pdewangan@nio.org

(India)


Dr. Shyam Chand, (Norway)


Dr. Priyank Jaiswal, U.S.A,

1. Seismic expert in gas hydrate and hazards due to gas migration. Has worked extensively on the gas hydrate system and slumping/sliding of slope sediments from Krishna-Godavari basin.

2. Seismic expert in gas hydrate and worked extensively on the gas hydrate system in the Arctic Gas Hydrate, Environment and Climate (CAGE)

3. Seismic expert in gas hydrate and worked extensively on the gas hydrate system in the Gulf of Mexico, USA.

Gas hydrate, methane migration, methane flares, slumping/sliding, mass transport deposits

Hydrocarbon deposits of economic importance have been found in the continental margins of several nations. This is encouraging and invites infrastructural development. However, this also requires that geo-hazards along the continental margins be investigated thoroughly to prevent loss of lives, damages to properties and catastrophic changes to the natural environments. Gas hydrate in particular can pose a significant threat to the sediment strength and stability along the margins. A detailed study of the margins using cutting edge geophysical tools for understanding gas hydrate and free gas system dynamics is necessary for long-term energy and sub-sea infrastructure planning. In this session, we would like to invite abstracts from the user community involved in the gas hydrate research with special emphasis on the geohazard potential of the gas hydrate destabilization.

Metals in Coastal Marine Environment: Distribution, Speciation and Bioavailability in Soil, Water, and Sediment

Dr. Parthasarathi Chakraborty, parthachemistry@gmail.com pchak@nio.org

1. Obtained PhD degree from Ottawa Carleton Chemistry Institute, Canada, 2007. After a Postdoc in Wagheningen University, The Netherlands, joined the CSIR-National Institute of Oceanography, India

2. Working on metal speciation and environmental geochemistry in CSIR-NIO for the last 10 years

3. Closely associated with SCOR-WG 139 and 145. Currently, serving as an Associate Editor of Marine Pollution Bulletin (Elsevier)

Coasts, metal speciation, Environmental Geochemistry, bioavailability, ecosystem

The occurrence of trace/heavy metals in the coastal/estuarine environment is from geogenic and anthropogenic sources. Knowledge of metal-natural ligand interaction (a vital part of the environmental geochemistry of metals) is essential to (i) identify the sources of metals in the environment, (ii) understand the fate of metals within the environment, and (iii) estimate the impact of trace/heavy metals on ecosystems and human health.

This symposium will address (i) Environmental chemistry of trace/heavy metals in coastal ecosystem, (ii) Chemical speciation (including modelling) of metals in coastal environment, (iii) Speciation of organometallic compound and toxic oxyanions from coastal marine environment and (iv) Bioavailability of metals across different species and exposure routes in coastal ecosystem.




Marine O)Xygen Minimum Zones: from Sedimentary Rocks to Modern Oceanographic Record

Dr. Aninda Mazumdar

maninda@nio.org

(India)


Dr. Wriddhiman Ghosh

(India)

Dr. Mazumdar is senior scientist at the CSIR-National Institute of Oceanography. Expert in sedimentary biogeochemistry. Working on Fe-S-C biogeochemistry and organic geochemistry.


Dr. Ghosh is Associate Professor at Bose Institute, Kolkata. Expert in microbiology. Currently working on microbial sulfur metabolism, and the microbiological processes of the oxygen minimum zone, off the west coast of India.


Perennial oxygen minimum zones (POMZs), as well as hypoxic coastal regions (transient OMZs) in the marine realms, are characterized by remarkable depletion in dissolved oxygen concentrations attributed to high biological productivity and respiration rate, coupled with poor O2 replenishment by oxygenated water masses. The POMZs occur within a water depth ranging from 200-1200 mbsl. Currently, POMZs are most widespread in the eastern Pacific, off the western coast of continents, and the northern Indian Ocean. Biogeochemical processes in the water columns and sediments of POMZs and TOMZs differ remarkably from those of the ambient oxic marine realms. Several reports on the expansion of OMZs and a consequential threat to marine life, especially fisheries, have augmented research interest in both water columns and paleo-records of OMZs. Global rock records are dotted with tell-tale signatures of remarkable oxygen-depletion phases within marine realms, right from the Proterozoic. Oxygen-depletions in the past have not only caused significant alterations in the global cycling of iron, carbon, sulfur, nitrogen and redox-sensitive elements but also impacted benthic biodiversity within and beyond the OMZs. In this way, through the geological past, marine OMZs have played a central role in the spatiotemporal delineation of benthic biogeochemistry across the global ocean.

With an aim at augmenting holistic understanding of the pasts and presents of marine OMZs, this symposium invites abstracts on sedimentary biogeochemistry and paleo-records, as well as aquatic geochemistry and geobiology, of global OMZs.