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Fluid Inclusion Noble Gas Data from Goldfield and Tonopah Epithermal Au-Ag Deposits

Metadata Updated: October 29, 2023

Twenty-five ore and gangue mineral separates from the Miocene-age Goldfield and Tonopah epithermal Au-Ag deposits in southwestern Nevada were analyzed to determine the helium, neon, and argon (He, Ne, and Ar) isotopic compositions contained in fluid inclusions. Four mineral separates from the Butte Main Stage vein deposit and two from the Bingham pyrite-enargite vein deposits were also analyzed. Fifteen separates are from hand samples collected from underground mine workings and the remaining 16 are from mine tailings piles and pits excavated within the past 100 years. The separates consist dominantly of pyrite, enargite, and quartz, with lesser amounts of sphalerite, galena, potassium feldspar, bismuthinite, marcasite, alunite, chalcocite, chalcopyrite, rhodonite, and gold. Fluid inclusion gases were extracted by thermal decrepitation at 300 to 350°C, with the exception of samples CL-480 and M2763A which were crushed under ultrahigh vacuum. Ar and Ne isotopic ratios are similar to atmospheric compositions while He isotopic ratios (helium-3/helium-4 [3He/4He]) range widely from 0.03 to 34.12 times the atmospheric 3He/4He value (R/RA, measured 3He/4He normalized to the atmospheric value of 1.384 x 10^-6).

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023
Publisher U.S. Geological Survey
Identifier USGS:58d139ffe4b0236b68f67460
Data Last Modified 20200929
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id f5895746-c766-4113-a4ac-7ea95ef93573
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -118.7677,35.5322,-110.8575,46.5589
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash ea62a931f9b32e5a680ee5c543e0be44cc81bb6fd90ebb231aff0f8a4f6940f6
Source Schema Version 1.1
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