Collaborative Research: Detachment Faulting and Basin Development in a Convergent Setting: The Cordillera Blanca, Peru

合作研究：聚合环境中的拆离断层作用和盆地发育：秘鲁布兰卡山脉

• 批准号: 0201937
• 负责人: Brian Horton
• 金额: $ 8.66万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-02-15 至 2006-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0201937&HistoricalAwards=false
• 关键词: Collaborative; Research; Detachment; Faulting; Basin

Detachment faults are large-scale extensional structures that are responsible for much of the extension observed in the crust, however the origin and evolution of detachments are poorly understood and controversial. This project will attempt to address the mechanisms and rates of detachment and associated basin development in an active modern example - the Cordillera Blanca detachment fault in the Peruvian Andes. The work centers on the temporal and spatial evolution of the supradetachment basin, the denudation history of the uplifted footwall, and the Quaternary kinematic history. Results will be incorporated into tectonic models for detachment faulting in oceanic-continental convergent settings, which are expected to be of general application in this tectonic setting.

拆离断层是一种大规模的伸展构造，在地壳中观测到的大部分伸展都是由拆离断层引起的，然而对拆离断层的起源和演化却知之甚少，而且存在争议。本项目将试图以一个活跃的现代例子-秘鲁安第斯山脉的科迪勒拉布兰卡滑脱断层-解决滑脱的机制和速率以及相关的盆地开发问题。研究了上拆离盆地的时空演化、隆升下盘的剥蚀史和第四纪运动史。研究结果将被纳入海陆辐合背景下滑脱断裂的构造模型，有望在该构造背景下具有普遍应用价值。