Some aspects of the geology and mineralogy of the fluorine-rich skarn at McCullough Butte, Eureka County, Nevada.

Research output: Chapter in Book/Report/Conference proceedingChapter

3 Citations (Scopus)

Abstract

A stockwork of veins and their alteration envelopes in Palaeozoic miogeosynclinal sedimentary rocks is exposed on two sides of some Cretaceous two-mica granite porphyry intrusions. The mineralization contains appreciable F, Zn and Be, and minor Mo, W and Sn. From the intrusions, the distal limit of garnet veins comes first, followed sequentially by those of plagioclase, muscovite and quartz veins. Early garnets and pyroxenes are Fe-poor; later garnets are Fe- and Mn-enriched. The skarn is attributed to F-rich fluids from the intrusions reacting with the carbonate host-rock under moderate T, and low P, fO2, fS2 and fCO2 conditions. Total Fe, Cu and Pb contents are low, but acid, F-bearing species and LIL elements are significant.-K.F.

Original languageEnglish (US)
Title of host publicationCarnegie Institution of Washington Year Book
Pages324-328
Number of pages5
Volume81
StatePublished - 1982
Externally publishedYes

Fingerprint

skarn
fluorine
garnet
mineralogy
geology
quartz vein
porphyry
carbonate rock
muscovite
mica
host rock
sedimentary rock
plagioclase
granite
Paleozoic
mineralization
Cretaceous
fluid
acid

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Some aspects of the geology and mineralogy of the fluorine-rich skarn at McCullough Butte, Eureka County, Nevada. / Barton, Mark D.

Carnegie Institution of Washington Year Book. Vol. 81 1982. p. 324-328.

Research output: Chapter in Book/Report/Conference proceedingChapter

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AB - A stockwork of veins and their alteration envelopes in Palaeozoic miogeosynclinal sedimentary rocks is exposed on two sides of some Cretaceous two-mica granite porphyry intrusions. The mineralization contains appreciable F, Zn and Be, and minor Mo, W and Sn. From the intrusions, the distal limit of garnet veins comes first, followed sequentially by those of plagioclase, muscovite and quartz veins. Early garnets and pyroxenes are Fe-poor; later garnets are Fe- and Mn-enriched. The skarn is attributed to F-rich fluids from the intrusions reacting with the carbonate host-rock under moderate T, and low P, fO2, fS2 and fCO2 conditions. Total Fe, Cu and Pb contents are low, but acid, F-bearing species and LIL elements are significant.-K.F.

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