Determination of Intensive Variables in Medium to High Grade Metamorphism of Pelitic Rocks

泥质岩中高级变质作用强度变量的测定

• 批准号: 9019277
• 负责人: Michael Holdaway
• 金额: $ 7.24万
• 依托单位: Southern Methodist University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-02-15 至 1993-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9019277&HistoricalAwards=false
• 关键词: Determination; Intensive; Variables; Medium; Grade

The principal investigators will study minerals and mineral stabilities in the chemical system iron oxide-titanium oxide- alumina-silica-water. In particular, the thermochemical and mixing properties of Fe-staurolite, the stability of Fe-cordierite, and the hematite-ilmenite solvus will be investigated. The staurolite and cordierite results should yield geothermobarometers useful in the study of pelitic rock metamorphism. The hematite-ilmenite work will allow estimates of oxygen fugacity and hence water fraction of fluids in graphitic pelites. It may also allow estimation of oxygen fugacity for rocks in which hemoilmenite occurs. Overall, this research will allow geologists to better estimate the conditions to which aluminous rocks have been subjected during metamorphism.

主要研究人员将研究矿物和矿物 在化学系统中的稳定性氧化铁-氧化钛- 氧化铝-二氧化硅-水。 特别是，热化学和混合 铁十字石的性质，铁堇青石的稳定性， 将研究赤铁矿-钛铁矿溶线。 十字石 和堇青石的结果应该产生地质温压计， 对泥质岩石变质作用的研究。 赤铁矿-钛铁矿工作 将允许氧逸度的估计，从而水分数 石墨泥层中的流体 它还可以允许估计 含铁钛铁矿岩石的氧逸度。 总的来说， 这项研究将使地质学家能够更好地估计 铝岩在形成过程中所经受的条件 变质作用