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Seeps and vents from trench to the back-arc of the Sandwich Plate - fluid und gas circulation of a microplate

从沟槽到夹层板后弧的渗漏和通风口 - 微孔板的流体和气体循环

基本信息

批准号：
219499983
负责人：
Professor Dr. Gerhard Bohrmann
金额：
--
依托单位：
Fachbereich 05: Geowissenschaften
依托单位国家：
德国
项目类别：
Infrastructure Priority Programmes
财政年份：
2012
资助国家：
德国
起止时间：
2011-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/219499983?language=en
关键词：
Seeps vents trench back arc

项目摘要

We request financial support to perform multidisciplinary studies on hydrothermal vents and cold seeps at the Sandwich plate during RV POLARSTERN cruise ANT XXIX/4 from 22 March to 16 April 2013 (Scotia l). During this field campaign we plan to obtain geophysical, geological, and video-seafloor observation data from potential venting location in order to explore those fluid and gas emission sites and to perform a first geological and geochemical sampling. Cold seeps and hot vents are very rare in Antarctica and locations associated to the Sandwich plate are of high interest. This is because of its tectonic and geographic position between the World Ocean and Antarctica, the relevance in biogeography of the chemosynthetic organisms, the unique geochemical and geological settings within the ocean-to-ocean collision zone and its frontier character in the polar deep sea. Hydrothermal activity is indicated for two Segments of East-Scotia Ridge (E2 and E9), however, tectonically-induced seepage is yet unknown in the Sandwich fore-arc area, as it is a common phenomenon in other subduction-related compression zones. A subsequent POLARSTERN cruise (Scotia II), which is not scheduled up to now, plans to perform more detailed AUV- and ROV-work at the seep and vent sites. The cruise Scotia II will strongly relay on the results of ANT XXIX/6. A post-doctoral scientific position is applied for in order to comprehensively analyse and Interpret the data obtained from seeps and vents during ANT XXIX/4.

我们请求财政支持，以便在2013年3月22日至4月16日期间对房车Polarstein邮轮XXIX/4期间三明治板块的热液喷口和冷渗漏进行多学科研究(Scotia L)。在这次实地行动中，我们计划从潜在的喷口位置获取地球物理、地质和海底视频观测数据，以便探索这些流体和气体喷发地点，并进行第一次地质和地球化学采样。冷渗漏和热喷口在南极洲非常罕见，与三明治板块有关的地点引起了人们的高度兴趣。这是因为它位于世界海洋和南极洲之间的构造和地理位置、化学合成生物的生物地理相关性、海洋-海洋碰撞带内独特的地球化学和地质环境以及极地深海的前沿特征。东斯科舍海脊的两段(E2和E9)显示了热液活动，但在夹层弧前地区，构造导致的渗漏尚不清楚，因为这在其他与俯冲有关的挤压带中是常见的现象。随后的北极星巡航(Scotia II)到目前为止还没有计划，计划在渗漏和喷口地点执行更详细的AUV和ROV工作。第二次巡航Scotia将大力依赖ANT XXIX/6的结果。申请一个博士后科学职位，以便全面分析和解释ANT XXIX/4期间从渗漏和喷口获得的数据。