When did Extrusion of the Tibetan Plateau Initiate and How Much Has Occurred? Geological Investigation of the Western Kunlun Shan, Western China

青藏高原的挤压何时开始以及发生了多少？

• 批准号: 9614664
• 负责人: An Yin
• 金额: $ 24.46万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-01-15 至 1999-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9614664&HistoricalAwards=false
• 关键词: When; did; Extrusion; Tibetan; Plateau

9614664 Yin Two models for the response of Asia to the collision between Indian and Asia are current. In the extrusion model, convergence is accommodated by lateral extrusion of western Tibet moving out of the way to the east of the Indian plate, whereas in the crustal thickening model invokes north-south shortening and thickening to accommodate convergence. The active Karakorum and Altyn Tagh faults have long been identified as candidates for the lateral extrusion model faults. However, uncertainly about timing and magnitude of slip on these faults has precluded quantitative evaluation of the relative importance of lateral extrusion vs. crustal thickening tectonics. This project is a mapping, geochronologic and paleomagnetic effort to establish slip history for these important faults. Results are expected to provide a quantitative evaluation of the applicability of these models for the Indo-Asian collision.

9614664 YIN两个模型，用于亚洲对印度和亚洲之间碰撞的反应。 在挤出模型中，通过向印度板块东部移动的西藏的横向挤出来容纳收敛，而在地壳增厚模型中，会引起南北缩短和增厚以适应收敛。 长期以来，活跃的karakorum和Altyn Tagh断层已被确定为横向挤出模型断层的候选者。 然而，关于这些断层上滑移的时间和幅度的不确定性排除了对横向挤出与地壳增厚构造的相对重要性的定量评估。 该项目是映射，地球学和古磁性的努力，以建立这些重要缺陷的滑移历史。 预计结果将对这些模型在印度 - 亚洲碰撞中的适用性提供定量评估。