Periplatform Environments and Sediments of the Maldive

ODP Leg 115的岩心样品表明，马尔代夫平台上的文石旋回模拟了氧同位素值的变化，而在其他地方发现的文石旋回可能是由溶解和碎屑输入的变化引起的。此外，侦察调查显示，与巴哈马群岛的不对称相反，马尔代夫泻湖的推进的斜形对双向的季节性亚洲季风有反应。德罗克斯勒博士获得了一笔资金，可以乘坐法国船只马里恩·杜弗雷纳号（Marion Dufresne）参加对该地区的国际考察。将收集巨大的活塞岩心（长达40米）、水样和高分辨率回声探测和地震剖面。回到德克萨斯州后，德罗克斯勒博士和助手们将进行初步研究，包括：1)对选定的岩心样本进行沉积学和同位素分析；2)水铸样品的化学分析；3) 1200 ~ 1500 km南海数据的处理与解释。这些数据将与Elf Aquataine在20世纪70年代收集的多通道地震反射数据相结合，并由他的法国同事提供给Droxler博士。他的研究目标是：1)将碳酸盐矿物学与观察到的水化学相匹配；2)绘制全新世沉积物厚度图，以衡量离岸运输；3)测量更新世文石旋回，并与已知台地成岩作用模式进行匹配；4)确定对更新世海平面变化的响应。

Drill core samples from ODP Leg 115 demonstrate that aragonite cycles on the Maldives platform mimic changes in oxygen isotope values, and as found elsewhere, probably result from changes in dissolution and detrital input. Furthermore, reconnaisance surveys have revealed that, in contrast to their asymmetry in the Bahamas, prograding clinoforms in the Maldive lagoons respond to the bi-directional, seasonal Asian monsoon. Dr. Droxler has been awarded funds to participate on an international expedition to this area aboard the French vessel Marion Dufresne. Giant piston cores (up to 40 m long), water samples and high resolution echosounding and seismic profiles will be collected. Back in Texas, Dr. Droxler and assistants will conduct preliminary studies including: 1) sedimentologic and isotopic analyses of selected core samples; 2) chemical analyses of hydrocast samples; and 3) processing and interpretation of 1200-1500 km of SCS data. These latter data will be integrated with multichannel seismic reflection data collected in the 1970's by Elf Aquataine and made available to Dr. Droxler by his French colleagues. His research goals are to: 1) match carbonate mineralogy to observed water chemistry; 2) map thicknesses of Holocene sediments to guage offbank transport; 3) measure Pleistocene aragonite cycles and match them to known patterns of platform diagenesis; and 4) determine the response to Pleistocene sea-level changes.