The exhumation history of the Himalayan orogen determined from Bengal Fan sedimentary record (IODP Leg 354)

根据孟加拉扇沉积记录确定的喜马拉雅造山带折返历史（IODP Leg 354）

• 批准号: NE/N005287/1
• 负责人: Yani Najman
• 金额: $ 4.47万
• 依托单位: Lancaster University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FN005287%2F1
• 关键词: exhumation; history; Himalayan; orogen; determined

The Himalayas are a type example of continent-continent collision, and resultant mountain building processes. Geologists can look at the rocks in the mountain belt itself to determine its evolution, but sometimes the evidence in the rocks in the mountain belt itself is obscured by later increases in the temperature and pressure that the rocks were subjected to, which overprints the evidence. Sediments eroded off the evolving Himalaya are deposited in the Bengal Fan, and these can provide an archive of the erosion of the history of the mountain belt through time which has not been obscured my later metamorphism, as the material was eroded and removed from the mountain belt prior to these later overprinting events. This project will analyse minerals that cooled as they were exhumed from deoth towards the surface in the mountain belt. The project will date the minerals to determine the time they cooled, and this will provide information on when the rocks were exhumed and how fast they exhumed, thus providing information on when and how fast the mountain belt grew.

喜马拉雅山是大陆与大陆碰撞以及由此产生的造山过程的典型例子。地质学家可以通过观察山带中的岩石来确定其演化过程，但有时山带中岩石本身的证据会被后来岩石所承受的温度和压力的增加所掩盖，这会覆盖证据。从不断演化的喜马拉雅山上被侵蚀下来的沉积物沉积在孟加拉扇中，这些沉积物可以提供一个山脉带随时间推移而被侵蚀的历史档案，这并没有掩盖我后来的变质作用，因为这些物质在后来的叠印事件之前就被侵蚀并从山脉带中移除。这个项目将分析在山脉地带从地下向地表挖掘时冷却的矿物。该项目将确定矿物的年代，以确定它们冷却的时间，这将提供有关岩石何时被挖掘以及挖掘速度的信息，从而提供有关山脉何时以及以多快的速度生长的信息。

项目成果

Allogenic and Autogenic Signals in the Stratigraphic Record of the Deep-Sea Bengal Fan.

• DOI: 10.1038/s41598-018-25819-5
• 发表时间: 2018-05-22
• 期刊: Scientific reports
• 影响因子: 4.6
• 作者: Blum M;Rogers K;Gleason J;Najman Y;Cruz J;Fox L
• 通讯作者: Fox L

Spatial and temporal trends in exhumation of the Eastern Himalaya and syntaxis as determined from a multitechnique detrital thermochronological study of the Bengal Fan

• DOI: 10.1130/b35031.1
• 发表时间: 2019-03
• 期刊: GSA Bulletin
• 作者: Y. Najman;Chris Mark;D. Barfod;A. Carter;R. Parrish;D. Chew;L. Gemignani