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

我们请求提供财政支助，以便在2013年3月22日至4月16日“极地号”考察船ANT XXIX/4号巡航考察期间对三明治板块的热液喷口和冷泉进行多学科研究（斯科舍l）。在这次实地活动中，我们计划从潜在的火山口位置获得地球物理、地质和海底视频观测数据，以探索这些流体和气体排放地点，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位置非常有趣。这是因为它的构造和地理位置在世界大洋和南极洲之间，化学合成生物在地理学上的相关性，海洋与海洋碰撞带内独特的地球化学和地质背景，以及它在极地深海的前沿特征。东斯科舍海脊的两个部分（E2和E9）显示有热液活动，但是，在桑威奇弧前地区，构造引起的渗漏尚不清楚，因为这是其他与俯冲有关的压缩区的常见现象。随后的POLARSTERN巡航（斯科舍II）计划在渗漏和喷口地点进行更详细的自主式水下航行器和遥控潜水器工作，但迄今尚未排定。"斯科舍二号“巡航考察将大力宣传ANT XXIX/6的成果。申请了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。

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.