Late Mesozoic History of the Western Luning-Fencemaker Belt and the Pine Nut Fault, West-Central Nevada

内华达州中西部鲁宁-栅栏带和松子断层的晚中生代历史

• 批准号: 9116559
• 负责人: John Oldow
• 金额: --
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-01-15 至 1994-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9116559&HistoricalAwards=false
• 关键词: Late; Mesozoic; History; Western; Luning

Recent work in the western U.S. Cordillera has focussed on possible substantial Mesozoic displacement on faults between the Sierra Nevada and the western Great Basin. However, the location, timing and sense of movement on these faults is poorly constrained. One of these, the Pine Nut fault in western Nevada, juxtaposes two coeval Mesozoic assemblages that have very different structural histories. This study will use an integrated structural, paleomagnetic, geochronologic and geothermobarometric approach to constrain the kinematic history of the Pine Nut fault. The results will clarify the late Mesozoic tectonic evolution of the western Cordillera, and will have broad implications for displacement field partitioning in active plate margin settings.

美国西部科迪勒拉地区最近的工作集中在内华达山脉和大盆地西部之间的断层上可能出现的大量中生代位移。然而，这些断层上的位置、时机和运动感受到的约束很差。其中之一，内华达州西部的松子断层，并列两个同时代的中生代组合，它们具有非常不同的构造历史。这项研究将使用综合的构造、古地磁、地质年代学和地温气压方法来约束松子断层的运动学历史。这一结果将阐明西部科迪勒拉的晚中生代构造演化，并将对活动板块边缘背景下的位移场划分具有广泛的意义。