Fluid Induced Fault-Zone Refrigeration: Petrologic, Isotopic, and Thermal Modeling Constraints

流体诱发的断层带制冷：岩石学、同位素和热模拟约束

• 批准号: 9811872
• 负责人: Jean Morrison
• 金额: $ 19.31万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-01-01 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9811872&HistoricalAwards=false
• 关键词: Fluid; Induced; Fault; Zone; Refrigeration

9811872Morrison Cordilleran metamorphic core complexes of the western US manifest large-scale Cenozoic crustal extension. Slip along the detachment faults documents lateral displacement, but other constraints on uplift and timing are required to develop realistic models of this phenomenon. Thermochronologic data have provided the best quantitative constraints on the cooling, uplift and slip rates, however inherent in the interpretation of these data is the assumption that cooling of the footwall occurred via conduction in response to uplift. Recent work has indicated the possibility that cooling occurred from advective extraction of heat from the lower plate by surface water flowing down the detachment. This project is aimed at testing this new idea. Results have many implications related to core complexes and rates of uplift.

9811872美国西部Morrison Cordillae变质核杂岩显示了新生代大规模的地壳伸展作用。 沿着滑脱断层的滑动记录了侧向位移，但需要对隆起和时间的其他限制来开发这种现象的现实模型。 热年代学数据提供了最好的定量约束的冷却，隆起和滑动速率，但固有的解释这些数据的假设，即冷却的下盘发生通过传导响应隆起。 最近的研究表明，冷却可能是由于地表水从脱离带流下，从下层板块平流吸取热量而发生的。 该项目旨在测试这一新想法。 结果有许多与核心复合体和隆升率有关的影响。