Salton Sea Scientific Drill Hole: A Natural Laboratory for Investigation of the Mineral-Solution Equilibria in a Deep Geothermal System
Salton Sea Scientific Drill Hole: A Natural Laboratory for Investigation of the Mineral-Solution Equilibria in a Deep Geothermal System
批准号:
8721225
负责人:
Juhn Liou
金额:
$11.95万
依托单位:
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
项目状态:
已结题
起止时间:
1988-03-01 至 1990-08-31
中文摘要
这项提议包括继续进行一项为期两年的研究,调查索尔顿海热液系统中循环流体引起的矿物-溶液平衡和低级变质作用。索尔顿海科学钻探项目获得的岩心和流体样品在脉状和蚀变矿物(特别是绿帘石)的结构和成分方面进行了表征。此外,还对冰岛地热系统的样品进行了模拟研究。后续研究将评估(1)流体-矿物平衡的细节;(2)热液绿帘岩的晶体、化学和同位素特征;(3)砂岩储层中的低温反应;(4)热液系统中压裂、热液循环和裂缝密封之间的关系。这些结果将应用于全球水-岩系统反应过程的评价。
英文摘要
The proposal involves continuation of a two year study investigating mineral-solution equilibria and low-grade metamorphism induced by circulatory fluids in the Salton Sea hydrothermal system. Cores and fluid samples obtained by the Salton Sea Scientific Drilling Project have been characterized in terms of structures and compositions of vein and alteration minerals (especially epidote). An analog study of sample from an Icelandic geothermal system was carried out in addition. Continued research will evaluate (1) details of fluid-mineral equilibria, (2) crystal, chemical, and isotopic characteristics of hydrothermal epidotes, (3) low temperature reactions in sandstone reservoir rocks, and (4) relations between fracturing, hydrothermal circulation, and fracture sealing in a hydrothermal system. These results will be applied to evaluation of reaction processes in water-rock systems worldwide.
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