The Plutonic Foundation of a Very Slow-Spreading Ridge

9618442迪克该奖项将支持对西南印度洋裸露的下层洋壳进行的海洋地质和地球物理研究。在大洋钻探计划作业期间，在该区域发现了浅层隆起海底的裸露地壳岩石。ODP735B站在该地区采集了400米的辉长岩垂直剖面，提供了地壳形成过程的详细记录。然而，到目前为止，由于没有关于周围海底地质的数据，很难将这些结果放在当地的背景下进行分析。本项目将通过进行详细的近底部观察和抽样来纠正这一情况。加拿大科学家将提供ROV ROPOS作为主要调查工具，并将对ROPOS上的凿岩机进行改装，以允许直接对观察到的岩石进行采样。主要目标是提供详细的海底近底检查和采样，将现有的ODP数据与当地环境联系起来，并为拟进行的钻探提供详细的现场勘测，以便在现有洞穴周围的地点采样。其他工作将包括新开发的英国凿岩机，以提供比ROPOS车辆更深的采样。样品和数据将被用来确定在这一独特的下地壳岩石裸露时的地壳形成过程。***

9618442 Dick This award will support a marine geological and geophysical study of exposed lower ocean crust in the southwest Indian Ocean. Exposed crustal rocks on shallow uplifted seafloor were discovered in this region during Ocean Drilling Program operations. ODP site 735B sampled a 400 meter vertical section of gabbros in this area providing a detailed record of crustal formation processes. To date , however, it has been difficult to place these results into a local context since no data are available on surrounding seafloor geology. The present project will rectify this situation by undertaking detailed near bottom observations and sampling. Canadian scientists will provide the ROV ROPOS as primary survey vehicle, and rock drill would be modified for deployment on ROPOS to allow direct sampling of observed rocks.The primary objective is to provide detailed near bottom examination and sampling of seafloor to tie existing ODP data to local environment and to provide detailed site survey for drilling to be proposed which would sample at sites surrounding existing hole. Additional work would include newly developed British rock drill to provide deeper sampling than could be done from ROPOS vehicle. Samples and data would be used to identify crustal formation process at this unique exposure of lower crustal rocks. ***