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Duration of Hydrothermal Activity at Steamboat Springs, Nevada, From Ages of Spatially Associated Volcanic Rocks
Abstract: Steamboat Springs is a presently active equivalent of epithermal gold-silver ore-forming systems. Hot-spring sinter deposits contain small amounts of gold, silver, mercury, antimony, and arsenic. Hot-spring activity probably started before extrusion of the basaltic andesite of Steamboat Springs. Old sinter from the Steamboat Springs system occurs in gravels above and below the basaltic andesite. Intense hydrothermal alteration, including almost complete replacement by hydrothermal potassium-feldspar, has affected the basaltic andesite. Three plagioclase separates of differing potassium content from fresh basaltic andesite yielded potassium-argon ages of 2.52 to 2.55 m.y. Basaltic andesite almost completely replaced by potassium-feldspar yielded an age of 1.1 m.y. The source of energy for the thermal convection system is probably a large rhyolitic magma chamber that supplied the pumice and from which the rhyolite domes were emplaced. Sanidine and obsidian from four of the rhyolite domes yielded potassium-argon ages of 1.15 to 1.52 m.y. and obsidian from one of the northeastern domes yielded apparent ages of 2.97 and 3.03 m.y. The data indicate that hydrothermal activity has occurred at Steamboat Springs, possibly intermittently, for more than 2-1/2 m.y. These data agree with other radiogenic age studies indicating 1- and 2-m.y. lifetimes for the hydrothermal systems that generate …
Date:
1979
Creator:
Silberman, M. L.; White, D. E.; Keith, T. E. C. & Dockter, R. D.
Object Type:
Report
System:
The UNT Digital Library
Telluric Traverse Location Map and Profiles for Double Hot Springs Known Resource Area, Nevada
None
Date:
August 3, 1978
Creator:
Senterfit, R. M.; Hoover, D. B. & Christopherson, K.
Object Type:
Book
System:
The UNT Digital Library
Principal Facts for a Gravity Survey of Baltazor Known Geothermal Resource Area, Nevada
The data presented are referenced to a gravity base station in Denio, Nevada at the Post Office, 50 meters south of the Oregon-Nevada State line, 1.6 meters south of the door in the southeast corner of the concrete porch, near the mailbox. Site is monumented with a ''USAF Gravity Station'' disc (A.C.I.C. reference number 2352-1). Base value is 979945.94.
Date:
January 1, 1977
Creator:
Peterson, D. L. & Hoover, D. B.
Object Type:
Book
System:
The UNT Digital Library
Telluric Traverse Location Map and Profiles for Fly Ranch, Northeast Known Geothermal Resource Area, Nevada
None
Date:
January 1, 1977
Creator:
Christopherson, K. R.; Hoover, D. B. & Senterfit, M. R.
Object Type:
Book
System:
The UNT Digital Library
Hydraulic Testing of Wells in Central Nevada. Central Nevada-20.
None
Date:
June 1970
Creator:
Dinwiddie, G. A.
Object Type:
Report
System:
The UNT Digital Library
Seismicity of the Southern Nevada Region, December 22, 1971 to July 1, 1972.
None
Date:
July 1972
Creator:
Bayer, Kenneth C.
Object Type:
Report
System:
The UNT Digital Library
Preliminary Seismicity Study of the Southern Nevada Region for the Month of October 1972.
None
Date:
December 1972
Creator:
Bayer, Kenneth C.
Object Type:
Report
System:
The UNT Digital Library
Earthquakes Recorded by a Seismograph Network Located in the Southern Nevada Region January 1 to December 22, 1971
None
Date:
May 1972
Creator:
Bayer, Kenneth C. & King, Kenneth W.
Object Type:
Report
System:
The UNT Digital Library
Radionuclide Concentrations and Botanical Composition of the Diet of Cattle Grazing the Area 18 Range of the Nevada Test Site, 1966--1970.
None
Date:
January 1, 1972
Creator:
Smith, D. D.; Brown, K. W.; Brechbill, R. A.; Giles, K. R. & Lesperance, A. L.
Object Type:
Report
System:
The UNT Digital Library
Summary of Hydraulic Testing in and Chemical Analyses of Water Samples From Deep Exploratory Holes in Little Fish Lake, Monitor, Hot Creek, and Little Smoky Valleys, Nevada.
None
Date:
1971
Creator:
Dinwiddie, George A. & Schroder, LeRoy J.
Object Type:
Report
System:
The UNT Digital Library
Audio-Magnetotelluric Data Log and Station Location Map for Gerlach Northwest Known Geothermal Resource Area, Nevada
Observed apparent resistivity data in ohm-meters, standard error data in ohm-meters, and number of observations are tabulated. (JGB)
Date:
January 1, 1977
Creator:
Long, C. L. & Senterfit, M.
Object Type:
Book
System:
The UNT Digital Library
Gravity Survey of the ue15j Site, Area 15, Nye County, Nevada.
None
Date:
1970
Creator:
Healey, D. L.
Object Type:
Report
System:
The UNT Digital Library
Baltazor 1500-1 and McGee 1500-2, Humboldt County, Nevada, Temperature Depth Data
This report talks about Baltazor 1500-1 and McGee 1500-2, Humboldt County, Nevada, Temperature Depth Data
Date:
June 1, 1979
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library