Provenance History of Upper Cenozoic Sandstones of the Bengal Basin, Bangladesh

描述：这篇论文改进基金支持尼尔·伦德伯格博士和他的博士候选人、孟加拉国的阿什拉夫·乌丁的旅行和实地费用。此外，一名美国本科生将参与研究，并获得与孟加拉国地质学家合作的经验。该项目将与孟加拉国达卡大学地质系的Monirul Hoque博士合作进行。它试图研究孟加拉盆地的第四纪层序，以获得相邻山脉带构造历史的岩石学、矿物学和年代学证据。在实地采集样品和进行沉积学观察之后，将对沉积物成分和裂变径迹年代学进行详细分析。砂岩的模式分析和重金属研究，辅之以碎屑磷灰石和锆石的裂变径迹分析，将用于评估源区成分的变化，确定去顶板的趋势和速度，并测试假想的抬升事件。这些数据将与亚喜马拉雅Siwalik层序和孟加拉扇的同等沉积物的现有数据集进行比较。范围：该项目可能提供有关喜马拉雅碰撞地层记录的详细定量数据。它将为美国大学的研究生和本科生提供在一个优秀的自然实验室进行研究的机会。它还可以帮助东道国更好地了解区域地质框架和盆地历史，这对开发孟加拉盆地的石油资源很重要。

Description: This dissertation improvement grant supports travel and provides field expenses for Dr. Neil Lundberg and his doctoral candidate, Ashraf Uddin of Bangladesh. In addition, a U.S. undergraduate student will participate in the research and gain experience in working with Bangladesh geologists. The project will be carried out in collaboration with Dr. Monirul Hoque of the Department of Geology, University of Dhaka in Bangladesh. It seeks to study the quaternary sequences of the Bengal basin for petrographic, mineralogic and geochronologic evidence of the tectonic history of the adjacent mountain belts. Sample collection and sedimentologic observations in the field will be followed by detailed analysis of sediment composition and fission-track geochronology. Modal analysis of sandstones and heavy-metal studies, complemented by fission-track analysis of detrital apatite and zircon, will be used to evaluate changes in source-area composition, to determine unroofing trends and rates, and to test hypothesized episodes of uplift. These data will be compared to existing data sets for equivalent deposits of the Sub-Himalayan Siwalik sequence and the Bengal fan. Scope: This project is likely to provide detailed quantitative data on the stratigraphic record of the Himalayan collision. It will provide research opportunity in an excellent natural laboratory for a graduate and undergraduate students in a U.S. university. It can also help the host country by provding an improved understanding of the regional geological framework and basin history, important in developing petroleum resources of the Bengal basin.