Spreading Structure and Detachment Faulting in the JosephineOphiolite: Implications for Slow-Spreading-Mid-Ocean Ridges

蛇绿岩代表了海洋地壳的倒折板块，因此提供了深入了解海洋地壳形成的可能性。约瑟芬蛇绿岩是世界上最大、最完整的蛇绿岩之一。本项目将详细研究最近发现的低角度断层，这些断层可能代表了在最初缓慢扩张的洋中脊活动期间活跃的低角度滑脱断层。与这种脱离断层相关的几何形状和展布结构不容易从海洋钻探中获得，最好从蛇绿岩样品中进行发育。结果将适用于几个重要的课题，包括岩石圈如何在缓慢扩张的中心形成。

Ophiolites represent obducted slabs of ocean crust, and as such offer the possibility of insights into ocean crust formation. The Josephine ophiolite represents one of the largest and most intact ophiolites in the world. This project will investigate in detail recently discovered low angle faults that may represent low angle detachment faults that were active during initial slow- spreading mid-ocean ridge activity. The geometry and spreading structure associated with such detachment faults can not be easily obtained from ocean drilling, and can best be developed from ophiolite examples. Results will be applicable to several important subjects including how lithosphere forms at slow spreading centers.