NSFGEO-NERC: Impact of the Plio-Pleistocene Transition on Provenance and Sediment Routing from the Himalaya to the Deep-Sea Bengal Fan

NSFGEO-NERC：上里奥-更新世过渡对从喜马拉雅山到深海孟加拉扇的物源和沉积物路径的影响

• 批准号: NE/V013165/1
• 负责人: Yani Najman
• 金额: $ 30.75万
• 依托单位: Lancaster University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FV013165%2F1
• 关键词: NSFGEO; NERC; Impact; Plio; Pleistocene

The Himalayas represent the largest mountain chain on Earth, and reside mostly in Nepal, India, Pakistan and China. The Himalayas began rising many millions of years ago when India collided with Asia, which changed Earth's climate, altered ocean circulation and chemistry, and impacted the course of biological evolution. Erosion of the Himalayas resulted in deposition of the largest pile of sediment on the planet in the Bay of Bengal, the deep-sea Bengal Fan. Within this sediment record lies the history of the Himalayas - the now eroded Mt. Everests of the past, buried under sediment of the continental shelf and the deepest parts of the Indian Ocean. In 2015, a multi-national expedition on the Joides Resolution, a specially designed drill ship, recovered ~1.5 miles of drill core that contains this record. New research will use sediment from these cores to trace the history of Himalayan erosion and how two of the world's largest rivers, the Ganges and Brahmaputra, delivered this sediment to the Bay of Bengal over the last 3-5 million years. Giant mountain ranges like the Himalayas are a rarity through geologic history, but without the Himalayas there are no drenching Asian monsoons, no fertile floodplains or aquifers, no ancient Indus Civilization, and no Mt. Everests in that part of the world. The results of this research will therefore tell us about climate change, landscape evolution, and how one of the world's most densely populated areas came to be as we see it today. Understanding the past in this way can help us better understand the future for the 10% of the world's population that lives under the influence of this incredible geographic feature.

喜马拉雅山脉是地球上最大的山脉，主要分布在尼泊尔、印度、巴基斯坦和中国。喜马拉雅山脉在数百万年前开始上升，当时印度与亚洲碰撞，改变了地球的气候，改变了海洋环流和化学，并影响了生物进化的过程。喜马拉雅山脉的侵蚀导致孟加拉湾沉积了地球上最大的沉积物，即深海孟加拉扇。在这些沉积物记录中，隐藏着喜马拉雅山的历史--现在被侵蚀的喜马拉雅山。过去的珠穆朗玛峰，埋在大陆架和印度洋最深处的沉积物下。2015年，一艘专门设计的钻井船Joides Resolution上的多国探险队发现了包含这一记录的约1.5英里的岩心。新的研究将利用这些岩芯中的沉积物来追溯喜马拉雅山侵蚀的历史，以及世界上最大的两条河流恒河和雅鲁藏布江在过去300万至500万年间如何将这些沉积物输送到孟加拉湾。像喜马拉雅山这样的巨型山脉在地质历史上是罕见的，但是没有喜马拉雅山，就没有亚洲的雨季，没有肥沃的洪泛平原或蓄水层，没有古老的印度河文明，也没有喜马拉雅山。最大的山峰。因此，这项研究的结果将告诉我们气候变化，景观演变，以及世界上人口最稠密的地区之一是如何成为我们今天所看到的。以这种方式了解过去可以帮助我们更好地了解生活在这一令人难以置信的地理特征影响下的世界人口的10%的未来。