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

ROW：巴尔的摩地区泥质片岩的变质作用——区域和地方尺度上变质条件的变化

• 批准号: 8721034
• 负责人: Helen Lang
• 金额: --
• 依托单位: West Virginia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-03-01 至 1992-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8721034&HistoricalAwards=false
• 关键词: ROW; Metamorphism; Pelitic; Schists; Baltimore

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.

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部分地区的变质和地质历史。将使用经过良好校准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史和随后的隆起史。这一结果将阐明该地区的构造史。此外，具有相同变质历史的岩石中不同的矿物组合也证明了其他因素的作用，即渗入这些岩石的流体成分不同。将再次使用适当的热化学计算来确定流体和块状岩石成分对所观察到的矿物组合的控制作用。