尼泊尔野外地质考察记录及照片数据集（新生代）

尼泊尔西部低喜马拉雅地区广泛发育的详细记录喜马拉雅山隆升历史及古气候、古环境和古生态演化等信息的新生代沉积地层，为研究高原隆升动力学机制及气候环境效应提供了契机。根据在该地区近10条剖面的野外详细探勘考察，发现该区新生代典型地层主要由印度被动大陆边缘沉积的坦森群和喜马拉雅山前陆盆地沉积的西瓦里克群组成，其中坦森群厚度2000-3000m不等，自下而上的新生代地层包括了阿米莱组（Amile）、巴颜斯喀提组（Bhainskati）、杜姆里组（Dumri）；西瓦利克群（Siwalik）可达4000m-6000m，主要由下、中和上西瓦里克组成。对其中出露较好的Butwal 剖面(309m，包括阿米莱组和巴颜斯喀提组上部地层)、Tulsipur 剖面(357m，包括阿米莱组顶部和巴颜斯喀提组地层)、Kalyan 剖面(1161m，包括巴颜斯喀提组上部和杜姆里组地层) 三个新生代地层典型剖面进行了1m间距的高精度古地磁年代学以及环境代用指标样品采集。通过分析该地区的地层时代及当时的古环境信息，可以探讨高原南北季风和干旱事件是否耦合同步，对揭示它们与青藏高原构造隆升和全球变化之间的关系具有重要意义。

The Cenozoic sedimentary strata widely developed in the western Lower Himalayan region of Nepal, which well-document the uplift history of the Himalayas and the evolution of paleoclimate, paleoenvironment and paleoecology, provide a crucial opportunity for studying the dynamic mechanisms of plateau uplift and their climatic and environmental effects. Based on detailed field surveys of nearly 10 stratigraphic sections in this region, it is found that the typical Cenozoic strata here are mainly composed of the Tansen Group deposited on the Indian passive continental margin and the Siwalik Group deposited in the Himalayan foreland basin. The Tansen Group varies in thickness from 2000 to 3000 meters, and its upward-successive Cenozoic strata include the Amile Formation, Bhainskati Formation and Dumri Formation. The Siwalik Group can reach 4000 to 6000 meters in thickness, and is mainly divided into Lower, Middle and Upper Siwalik subunits. High-precision paleomagnetic chronology sampling and environmental proxy indicator samples were collected at 1-meter intervals from three well-exposed representative Cenozoic stratigraphic sections: the Butwal Section (309 m, covering the Amile Formation and upper Bhainskati Formation), the Tulsipur Section (357 m, covering the top of the Amile Formation and the entire Bhainskati Formation), and the Kalyan Section (1161 m, covering the upper Bhainskati Formation and the Dumri Formation). By analyzing the stratigraphic ages and contemporaneous paleoenvironmental data of this region, we can explore whether the monsoon systems and arid events across the Tibetan Plateau are synchronously coupled, which is of great significance for revealing their correlations with the tectonic uplift of the Tibetan Plateau and global changes.

搜集汇总

背景与挑战

背景概述

该数据集包含尼泊尔西部低喜马拉雅地区新生代沉积地层的野外考察记录和照片，用于研究喜马拉雅山隆升历史及古气候演化。数据以表格xlsx格式存储，文件大小为26.11 MB，时间范围为新生代，共享方式为开放获取。