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

本研究的目的是测试的假设，中中新世到最近的地层马尔代夫碳酸盐台地季风控制。在中新世晚期和上新世早期，季风相关的电流，上升流和营养注入到浅水中引发了部分平台溺水。自中新世以来，强大的底流积聚了漂流体，并导致沿着环礁侧翼的侵蚀。该工作计划包括ODP站点716的跨学科分析，其中涉及沉积学，地球物理学，微体古生物学和地球化学方法。沉积旋回在ODP站点716，其关系到季风强度的波动中保存的继承，并通过时间的周期性的变化将被证明。这将通过对ODP站点716岩心进行深入的沉积学重新描述、测量粒度和碳酸盐含量、分析南极有孔虫协会以及X射线衍射法来实现。将分析产生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回声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断裂和变化联系起来。

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.