Kinematics and Timing of Tectonic Exhumation along the Huwan and Taihu Detachments: Northern and Southern Boundaries of the Dabie/Tonghai Shan Ultra-High Pressure Terrain

9805337罗利在越来越多的造山带榴辉岩中发现了柯石英和钻石组合，这表明超高压(埋深90-120公里)岩石的折返在地质记录中并不是唯一的事件。然而，这种挖掘遗骸的机制和时间尺度仍然没有完全确定。该项目旨在提高对可能涉及大规模伸展构造的大别/通海超高压组合折返的运动学和时间尺度的认识。将对最近发现的两条非常大的位移候选正断层进行位移相等、错距和运动年龄的检查。结果将与超高变质作用的时间进行比较，以检验有关造山带隆升和折返机制的几个假说。

9805337 Rowley The presence of coesite-and diamond-bearing assemblages in eclogites from an increasing number of orogenic belts suggests that the exhumation of ultra-high pressure (burial depths 90-120 km) rocks is not a unique event in the geologic record. However, the mechanisms and the time scale over which such exhumation takes place remain incompletely characterized. This project is aimed at improving the understanding of the kinematics and timescales for exhumation of the Dabie/Tonghai ultra high pressure assemblages, which may involve large scale extensional tectonics. Two recently discovered very large displacement candidate normal faults will be examined for displacement same, offset and age of movement. Results will be compared to timing of ultrahigh metamorphism to test several hypotheses about uplift and exhumation mechanism in orogens.