Ultra-High Pressure (20-40 Kbar) Metamorphism and Melting of Crustal Rocks

地壳岩石的超高压（20-40 Kbar）变质作用和熔化

• 批准号: 9725190
• 负责人: Alberto Patino Douce
• 金额: $ 6.5万
• 依托单位: University of Georgia Research Foundation Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-02-15 至 2000-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9725190&HistoricalAwards=false
• 关键词: Ultra; Pressure; 20; 40; Kbar

9725190 Pati(o Douce The research to be performed consists of determination of the melting relations, melt fractions, and melt and restite compositions of crustal rocks at conditions characteristic of ultra-high pressure metamorphism. The bulk of the experimental work will be conducted at pressures of 30 and 40 kbar which is the most relevant pressure range for UHPM. A few experiments at 20 kbar will also be performed, with the objective of tying the 30 and 40 kbar results to lower pressure ((15 kbar) experiments on the same starting materials already completed by the PI in previous projects. The starting materials to be investigated are the felsic metapelite from the Himalayas and the calc-alkaline tonalite from the Sierra Nevada. These two starting materials are suitable models for the most abundant sedimentary and igneous rocks in continental crust, respectively. Experiments will be performed both without added H2O (dehydration melting) and with small amounts of added H2O.

9725190帕蒂（o Douce）所要进行的研究包括确定在超高压变质作用特征条件下地壳岩石的熔融关系、熔体分数以及熔体和残余物成分。大部分实验工作将在30和40 kbar的压力下进行，这是UHPM最相关的压力范围。还将在20 kbar下进行一些实验，目的是将30和40 kbar的结果与PI在先前项目中已经完成的相同起始物料的低压（15 kbar）实验联系起来。研究的起始材料是喜马拉雅山的长英质变岩和内华达州山脉的钙碱性英云闪长岩。这两种起始物质分别是大陆地壳中最丰富的沉积岩和火成岩的合适模型。将在不添加H2O（脱水熔融）和添加少量H2O的情况下进行实验。