Periplatform Environments and Sediments of the Maldive

来自ODP115段的钻探岩心样本表明，马尔代夫平台上的文石旋回模拟了氧同位素值的变化，并且如在其他地方发现的那样，可能是由于溶解和碎屑输入的变化造成的。此外，侦察调查显示，与巴哈马群岛的不对称性不同，马尔代夫泻湖的前移床形对双向、季节性的亚洲季风做出了反应。德罗克斯勒博士已获得资助，将乘坐法国船只马里昂·杜弗雷纳号参加前往该地区的国际探险。将收集巨大的活塞岩心(长达40米)、水样以及高分辨率的回声测深和地震剖面。回到德克萨斯州，Droxler博士和助手们将进行初步研究，包括：1)选定的岩心样品的沉积学和同位素分析；2)水力铸造样品的化学分析；3)处理和解释1200-1500公里的SCS数据。后者的数据将与1970年由Elf Aquataine收集的多道地震反射数据整合在一起，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测到的水化学相匹配；2)绘制全新世沉积物厚度图，以测量离岸运移；3)测量更新世文石旋回，并将其与已知的台地成岩模式相匹配；以及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.