Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Is the ancestral Yellowstone hotspot responsible for the Tertiary "carlin" mineralization in the Great Basin of Nevada?

Gary L. Oppliger, J. Brendan Murphy and George H. Brimhall
Is the ancestral Yellowstone hotspot responsible for the Tertiary "carlin" mineralization in the Great Basin of Nevada?
Geology (Boulder) (July 1997) 25 (7): 627-630

Abstract

We propose a genetic relationship between the 43-34 Ma magmatism, extensional tectonics, and gold mineralization event centered in the Great Basin of Nevada and the development of the ancestral Yellowstone hotspot. The model is compatible with Cenozoic regional tectonics and provides a plausible explanation of the spatial coincidence of the Eocene-Oligocene magmatic events and the Carlin-type gold deposits. These features are centered in the Battle Mountain region of the Great Basin, coincident with the inferred ca. 40-30 Ma position of the Yellowstone hotspot. The Yellowstone hotspot is probably a plume that ascended from the core-mantle boundary, a region thought to be anomalously rich in gold and in the moderately siderophile elements associated with gold deposits. As the hotspot was progressively overridden by the North American plate after ca. 60 Ma, a magmatically quiescent period related to subhorizontal subduction gave way to the generation of ca. 43-34 Ma voluminous intracrustal melts and metamorphic devolatization as the hotspot broke though the subducted Farallon plate. Coeval crustal extension and convective circulation of hydrothermal fluids in the upper crust facilitated the exploitation of the structural and lithologic traps that characterize the classic Carlin-type deposits.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 25
Serial Issue: 7
Title: Is the ancestral Yellowstone hotspot responsible for the Tertiary "carlin" mineralization in the Great Basin of Nevada?
Affiliation: Kennecott Exploration, Reno, NV, United States
Pages: 627-630
Published: 199707
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 33
Accession Number: 1997-056018
Categories: Economic geology, geology of ore depositsSolid-earth geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: sects., sketch map
N35°00'00" - N42°00'00", W120°00'00" - W114°04'60"
N35°00'00" - N43°00'00", W120°00'00" - W111°00'00"
Secondary Affiliation: St. Francis Xavier University, Antigonish, NS, CAN, CanadaUniversity of California at Berkeley, Berkeley, CA, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 199718
Close Modal

or Create an Account

Close Modal
Close Modal