ROW: Metamorphism of Pelitic Schists in the Baltimore Area-Variation in Metamorphic Conditions on a Regional and Local Scale

这项调查将有助于更好地了解阿巴拉契亚皮埃蒙特地区的部分地区在巴尔的摩地区的变质和地质历史。压力和温度将估计变质沉积岩使用校准良好的矿物平衡反应，这些结果适用于确定这些岩石的埋藏和随后的隆起历史。其结果将阐明该地区的构造历史。此外，具有相同变质历史的岩石中不同的矿物组合证明了其他因素的作用，即通过这些岩石的流体的不同成分。流体和散装岩石成分控制所观察到的矿物组合的作用将被确定，再次使用适当的热化学计算。

This investigation will contribute to better understanding of the metamorphic and geologic history of a portion of the Appalachian Piedmont region in the Baltimore area. Pressures and temperatures will be estimated for metamorphosed sedimentary rocks using well-calibrated mineral equilibria reactions and these results applied to determine the burial and subsequent uplift history of these rocks. The results will elucidate the tectonic history of the area. In addition varied mineral assemblages in rocks having the same metamorphic history attest to the operation of other factors, namely differential compositions of fluids percolating through these rocks. The role of fluid and bulk rock compositions controlling the observed mineral assemblages will be determined, again using appropriate thermochemical computations.