干旱区生态环境知识资源中心(Arid): Geochemistry, age and strontium isotope composition of late tertiary and quaternary basalts and andesites in western Nevada and their relation to geothermal potential. Final report, October 1, 1982-December 31, 1983

Arid

DOI	10.2172/6838221
报告编号	DOE/RA/50075-1
来源ID	OSTI_ID: 6838221
	Geochemistry, age and strontium isotope composition of late tertiary and quaternary basalts and andesites in western Nevada and their relation to geothermal potential. Final report, October 1, 1982-December 31, 1983
	Fultz, L.A.; Bell, E.J.; Trexler, D.T.
英文摘要	This research was undertaken to characterize the late Cenozoic volcanic rocks associated with active geothermal systems in west-central Nevada. Petrographic and microprobe, geochemical and isotopic analysis and age dating techniques were used to characterize these young volcanic rocks. These data were combined with the limited data previously reported in the literature on these same volcanic areas to interpret their petrogenesis. The overall characterization resulted from integrating the petrogenesis with a structural-tectonic model of the region. Potassium-argon isotopic ages ranging up to 14 million years were determined for eight localities within the Reno 1 x 2/sup 0/ study region. These ages are consistent with the morphology of the volcanic landforms, the active geothermal systems associated with them, and with other isotopic ages reported in the literature for these and similar rocks within the study region. Petrographic analysis of hand specimens and thin-sections indicated mineralogic assemblages of the respective rock types and specific mineral textures and phenocryst compositions and characteristics. These identifications were further substantiated by microprobe analysis of selected phenocrysts and groundmass phases. Classification of the respective rock types was also based on chemical composition and normative calculations using the program PETCAL. Basaltic andesites are identified and described for Steamboat Hills, Table Mountain, Silver Springs, Churchill Butte, Cleaver Peak, Desert Peak and Carson City sites.
出版年	1984
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	15 GEOTHERMAL ENERGY ; NEVADA ; AGE ESTIMATION ; GEOCHEMICAL SURVEYS ; GEOTHERMAL SYSTEMS ; ANDESITES ; BASALT ; CHEMICAL COMPOSITION ; CLASSIFICATION ; RESOURCE POTENTIAL ; STRONTIUM ISOTOPES ; TECTONICS ; VOLCANIC ROCKS ; ALKALINE EARTH ISOTOPES ; FEDERAL REGION IX ; IGNEOUS ROCKS ; ISOTOPES ; NORTH AMERICA ; ROCKS ; SURVEYS ; USA Geothermal Legacy
URL	http://www.osti.gov/scitech/servlets/purl/6838221
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/260123
推荐引用方式 GB/T 7714	Fultz, L.A.,Bell, E.J.,Trexler, D.T.. Geochemistry, age and strontium isotope composition of late tertiary and quaternary basalts and andesites in western Nevada and their relation to geothermal potential. Final report, October 1, 1982-December 31, 1983,1984.