COLLABORATIVE RESERARCH: Assessing the Style, Evolution of Large-Magnitude Intracontinental Deformation, and the Role of Extrusion Tectonics, Eastern Himalayan Syntaxis, Yunnan

合作研究：评估大规模陆内变形的样式、演化以及挤压构造的作用，东喜马拉雅构造，云南

• 批准号: 9706300
• 负责人: John Geissman
• 金额: $ 18.11万
• 依托单位: University of New Mexico
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-07-15 至 2002-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9706300&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESERARCH; Assessing; Style; Evolution

9706300 Geissman The Indian-Asian collision zone is the type locality of a continent-continent collision, and studies of this zone reveal the tectonic processes of such collisions that are not obtainable in more ancient collision systems. Of particular concern is the controversy between the hypotheses of extrusion and rotation, in this case of blocks of Asian crust . Is the shortening of the Asian crust accomplished by extrusion of wedge-shaped blocks of crust, or by rotation-aided movement of these blocks. This study will address this issue by both structural and paleomagnetic approaches. The field structural and associated kinematic studies will allow testing of the extrusion models, and the paleomagnetic studies will allow testing of the rotational studies. Together both hypotheses can be tested for this critical region of southwest China, and will provide a strong context for the interpretation of more ancient mountain belts where structural overprinting have made these questions much more difficult to address.

9706300 Geissman印度-亚洲碰撞带是大陆-大陆碰撞的典型地点，对该带的研究揭示了在更古老的碰撞系统中无法获得的这种碰撞的构造过程。特别令人关注的是挤压和旋转假说之间的争议，在这种情况下，亚洲地壳块。亚洲地壳的缩短是由楔形地壳块体的挤压完成的，还是由这些块体的旋转辅助运动完成的？本研究将通过构造和古地磁两种方法来解决这个问题。 现场结构和相关的运动学研究将允许测试的挤压模型，和古地磁研究将允许测试的旋转研究。 这两个假设可以在中国西南部的这一关键地区得到检验，并将为解释更古老的山脉带提供强有力的背景，在这些山脉带中，构造叠加使这些问题更加难以解决。