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巴尔的摩地区阿巴拉契亚山前地区的变质和地质历史。利用校准良好的矿物平衡反应来估计变质沉积岩的压力和温度，并将这些结果应用于确定这些岩石的埋藏和随后的隆起历史。研究结果将阐明该地区的构造史。此外，具有相同变质史的岩石中不同的矿物组合证明了其他因素的作用，即渗透穿过这些岩石的流体的不同组成。流体和大块岩石组成控制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.