热的 Cordilleran 内陆促进了下层地的移动性和拉拉米德变形的脱
Dominik R Vlaha1,2,3, Andrew V Zuza4,5, Lin Chen6
1Nevada Bureau of Mines and Geology, University of Nevada, Reno, NV, USA. dvlaha@unr.edu.
Nature communications
|May 4, 2024
概括
拉拉米德的色素原体.
科学领域:
- 地质地质地质地质地质地
- 构造学 构造学 构造学 构造学
- Cordilleran Orogeny Cordilleran Orogeny Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran Cordilleran 是一个由山脉组成的区域.
背景情况:
- 拉拉米德矿原涉及从北美板块边缘1000公里以上的变形.
- 现有的构造模型并不能完全解释拉拉米德地质形成 (90-60万年前) 期间 Cordilleran 内陆缺乏收缩变形.
研究的目的:
- 重建在白纪晚期的 Cordilleran 内陆的热建筑.
- 为了研究热条件在拉拉米德或生成中的作用.
主要方法:
- 碳质材料温度计的拉曼光谱学.
- 编制和插值的温度数据 (n=200) 从上方15-20公里的 Cordilleran地.
- 对恢复的地部分进行分析.
主要成果:
- 在拉拉米德山脉内陆,在拉拉米德山脉产地过程中表现出持续高的上层地地热梯度 (>40°C/公里).
- 这些热条件与峰值的变态条件和高岩石岩石冥土主义保持一致.
- 热和部分化的内陆促进了下层地的移动性和地地脱.
结论:
- 内陆的高地热梯度是拉拉米德orogenic过程的一个关键因素.
- 内陆的热状态影响了地的动态和变形模式.
- 这项研究为驱动拉拉米德orogeny的机制提供了新的视角.
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