Nd Isotopic Study of Foreland Basin Sediments and Source Terranes of the Himalayan Fold-Thrust Belt: Implications for Regional Tectonic History

喜马拉雅褶皱冲断带前陆盆地沉积物和物源地体的 Nd 同位素研究：对区域构造历史的启示

• 批准号: 9814060
• 负责人: Peter DeCelles
• 金额: $ 4.98万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-01-01 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9814060&HistoricalAwards=false
• 关键词: Nd; Isotopic; Study; Foreland; Basin

9814060DeCelles This project is aimed at an important facet to the major question about when the Himalaya began to uplift and make a large topographic expressions. In northwestern Himalaya uplift and erosion is Middle Miocene, documented by coarse-grained, obvious syn-tectonic sedimentary facies. However, in central and eastern Himalaya, these coarse sediments are missing. The approach taken by this research is to employ the large Sm-Nd differences between possible source regions for establishing when detritus from each entered the Neogene foreland basin desposits in the Siwalik Group. Results are widely applicable to Himalayan tectonics and to climatic and oceanographic consequences of Himalayan uplift and erosion.

9814060 DeCelles这个项目的目的是一个重要方面的主要问题，当喜马拉雅山开始隆起，使一个大的地形表达。 喜马拉雅山西北部的隆升剥蚀期为中中新世，沉积相粒度粗，同构造沉积相明显。 然而，在喜马拉雅山脉的中部和东部，这些粗沉积物却不见了。 本研究所采取的方法是采用大的Sm-Nd可能的源区之间的差异，以建立当碎屑从每个进入新近纪前陆盆地沉积在西瓦利克组。 结果广泛适用于喜马拉雅构造和喜马拉雅隆起和侵蚀的气候和海洋学后果。