Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.2172/5166169 |
| 报告编号 | DOE/ET/28392-41 |
| 来源ID | OSTI_ID: 5166169 |
| Summary of potassium/argon age dating, 1979 | |
| Evans, S.H. Jr. | |
| 英文摘要 | During FY-79 the K/Ar dating laboratory at the Department of Geology and Geophysics of the University of Utah became operational. During the past calendar year forty-seven dates have been produced from areas predominantly in Utah. Dating has also been done on areas in Nevada and Montana through the State-Coupled program and Case Studies Support program. Areas in wich activity was concentrated include: Cove Creek Domes/Twin Peaks Area, SW Utah. Here volcanic activity spanned the time from 2.74 to 2.35 M.Y., with a mean age of 2.50 +- 0.14 M.Y. Black Rock Desert, SW Utah. Two dates on a single flow indicate an age of 1.49 +- 0.08 M.Y. for a flow previously undated. Wildcat Creek Area, SW Utah. Dating of rhyolite flows from this area gives a mean age of volcanism of 9.25 +- 0.16 M.Y., considerably older than previously inferred by the work of Haugh (1978). Mineral Mountains Pluton, SW Utah. Twelve dates on phases of the pluton indicate a complex history of intrusion, and more work is indicated in order to derive a coherent picture of the magmatic events leading to the formation of this batholith. Blackfoot Reservoir, Idaho. Two dates on rhyolite domes, previously updated, give ages of 1.56 +- 0.06 M.Y. and 1.28 +- 0.15 M.Y. |
| 出版年 | 1980 |
| 报告类型 | Technical Report |
| 语种 | 英语 |
| 国家 | 美国 |
| 来源学科分类 | 15 GEOTHERMAL ENERGY ; VOLCANIC ROCKS ; ISOTOPE DATING ; AGE ESTIMATION ; AMPHIBOLE ; ANORTHOSITES ; BASALT ; BIOTITE ; INTRUSION ; MONTANA ; NEVADA ; RHYOLITES ; UTAH ; VOLCANIC REGIONS ; VOLCANISM ; GABBROS ; IGNEOUS ROCKS ; MICA ; MINERALS ; NORTH AMERICA ; PLUTONIC ROCKS ; ROCKS ; ROCKY MOUNTAIN REGION ; USA ; WESTERN REGION Geothermal Legacy 150201* -- Geology & Hydrology of Geothermal Systems-- USA-- (-1989) |
| URL | http://www.osti.gov/scitech/servlets/purl/5166169 |
| 资源类型 | 科技报告 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/262576 |
| 推荐引用方式 GB/T 7714 | Evans, S.H. Jr.. Summary of potassium/argon age dating, 1979,1980. |
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