Monsoonal impact on the Maldives carbonate platform (ODP Site 716).

这项研究的目的是验证马尔代夫碳酸盐台地中中新世至近代地层学受季风控制的假设。在中新世晚期和上新世早期，与季风有关的洋流、上升流和营养物质注入浅水引发了部分台地溺水。自中新世以来，强烈的底流沿环礁两侧堆积漂移体并引起侵蚀。该工作计划包括对ODP716站点的跨学科分析，其中涉及沉积学、地球物理、微古生物学和地球化学方法。716站位的沉积旋回性，它与序列中保存的季风强度波动的关系，以及周期性随时间的变化将被证明。这将通过对ODP716站岩心进行深入的沉积学重新描述、测量颗粒大小和碳酸盐含量、分析浮游有孔虫组合以及X射线衍射术来实现。将分析得到的时间序列的周期性变化。沉积学数据将与2007年获得的数字沉积物测深仪和高分辨率地震数据合并，以便将沉积学变化与地层结构的破坏和变化联系起来。

The goal of this study is to test the hypothesis that the Middle Miocene to Recent stratigraphy of the Maldives carbonate platform was controlled by the monsoon. Monsoon-related currents, upwelling, and nutrition injection into the shallow water triggered partial platform drowning during the late Miocene and early Pliocene. Since the Miocene, strong bottom currents accumulate drift bodies and induce erosion along the atolls flanks. The working program comprises an interdisciplinary analysis of ODP Site 716, which involves sedimentological, geophysical, micropaleontological, and geochemical methods. Sedimentary cyclicity at ODP Site 716, its relation to fluctuations in monsoonal intensity as preserved in the succession, and variations of periodicities through time will be demonstrated. This will be achieved by in-depth sedimentological redescription of ODP Site 716 cores, measurements of grain size and carbonate content, analysis of the planktic foraminifer associations, as well as X-ray diffractometry. Resulting time series will be analyzed for variations in periodicities. Sedimentological data will be merged with digital sediment echosounder and high-resolution seismic data acquired in 2007 in order to link sedimentological variations to breaks and changes in the stratigraphic architecture.