Oceanic Faults in the Josephine Ophiolite: Geometry, Fluid Flow, and Magnetism

约瑟芬蛇绿岩中的海洋断层：几何、流体流动和磁性

• 批准号: 9005406
• 负责人: Gregory Harper
• 金额: $ 12.07万
• 依托单位: SUNY at Albany
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-06-01 至 1993-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9005406&HistoricalAwards=false
• 关键词: Oceanic; Faults; Josephine; Ophiolite; Geometry

The Josephine ophiolite is a large, complete ophiolite in northwestern California, which probably formed by a slow- spreading mid-ocean ridge. Previous work has indicated that magma chambers were episodic resulting in structural extension and tilting of the entire crustal sequence above an upper mantle detachment. This continuation will focus on developing criteria for oceanic faults, including serpentinite shear zones above the detachment, and the relationships between magmatism, faulting and hydrothermal metamorphism. Results are expected to provide insights into several aspects of slow-spreading mid-ocean ridges and their recognition in ancient examples.

约瑟芬蛇绿岩是一个大型、完整的蛇绿岩， 加州西北部，可能是由一个缓慢的- 伸展的大洋中脊 以前的工作表明， 岩浆房是幕式的，导致构造伸展 以及整个地壳序列在上地幔之上的倾斜 支队 这项工作将侧重于制定标准 对于大洋断层，包括 拆离作用，以及岩浆作用、断裂作用和 热液变质作用 预计结果将提供 对大洋中脊缓慢扩张的几个方面的深入了解 和他们在古代的例子中的认识。