Facies, grain shape and composition of Late Pleistocene, unconsolidated, volcanoclastic turbidites (Lesser Antilles, IODP 340 Sites 1397 and 1398): Understanding volcanic and climatic forcing of submarine mass flows

申请人计划与一名博士生一道研究晚更新世火山碎屑浊积岩和碎屑岩，这些是2012年3月至4月在国际大洋钻探项目第340次巡航考察期间在多米尼克和马提尼克岛（小安的列斯群岛）以西钻探和回收的（申请人是这次巡航考察的同船方成员）。该项目包括对2012年8月从U 1397和1398站点岩心采集的221个样本的沉积相、颗粒形状和成分进行详细分析。这些结果将得到弗赖贝格研究小组对每个样本中生物成分进行的生物地层学和古水深测量调查的支持。进一步确认我们的模型，预计从整合船上数据（岩石物理，钻孔测井等）。和其他IODP 340研究小组的发现（例如年代地层学）。拟议项目的重点是对火山颗粒的形状和内部结构进行定量3D分析。除了完成小安的列斯群岛弧火山演化的知识，我们想测试在何种程度上的浊积岩的纹理/成分分析允许其起源和触发机制的信心假设。

Together with a PhD student, the applicant plans to study Late Pleistocene volcaniclastic turbidites and debrites, which have been drilled and recovered west of Dominica and Martinique (Lesser Antilles) in March-April 2012 during IODP Cruise 340 (the applicant was ship party member of this cruise). The project comprises detailed analysis of the depositional facies, grain shape, composition of 221 samples that have been taken in August 2012 from cores of Sites U 1397 and 1398. The results will be supported by biostratigraphic and paleobathymetric investigation of the biogenic component in each sample, carried out by the Freiberg research group. Further confirmation of our models is expected from integration of ship board data (petrophysics, drill hole logging etc.) and findings of other IODP 340 research groups (e.g. chronostratigraphy). Focus of the proposed project is a quantitative 3D analysis of the shape and internal texture of volcanigenic grains. Apart from completion of knowledge on the volcanic evolution of the Lesser Antilles arc, we want to test to what extent textural/compositional analysis of turbidites allows for confident assumption on their origin and triggering mechanism.