Petrology and Petrography of the Metamorphic Aureole Associated with the Deep Post Orebody, Eureka County, Nevada
The Post Gold deposit is located in the northern part of the Carlin trend. The mineralization at Post occurs in proximity to a Jurassic-Cretaceous composite stock. Most of the gold at Post is hosted by non-metamorphosed calcareous siltstone and highly altered diorite, adjacent to the low grade skarn. Endoskarn, exoskarn, hornfels and marble are developed outward from the intrusive. The skarn is composed dominantly of diopside, tightly intergrown with garnet, k-feldspar, and sphene. The highest grade gold values are adjacent to the skarn, which acted as a permeability barrier to fluid migration. Post is the first Carlin-type deposit at which a skarn has been recognized to play a significant role in the localization of gold.
C. M. Walck et al., "Petrology and Petrography of the Metamorphic Aureole Associated with the Deep Post Orebody, Eureka County, Nevada," Proceedings of the Gold '90 Symposium (1990: Salt Lake City, UT), pp. 135-148, Society for Mining, Metallurgy and Exploration, Feb 1990.
Gold '90 Symposium (1990: Feb. 26-Mar. 1, Salt Lake City, UT)
Geosciences and Geological and Petroleum Engineering
Keywords and Phrases
Geology - Nevada; Petrology - Petrography; Jurassic-Cretaceous Composite Stock; Ore Genesis; Paragenesis; Pyroxene Hornfels; Skarns; Gold Deposits
Eureka County, Nevada
International Standard Book Number (ISBN)
Article - Conference proceedings
© 1990 Society for Mining, Metallurgy and Exploration, All rights reserved.
01 Feb 1990