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Summary of the geology and physical properties of the Climax Stock, Nevada Test Site

Open-File Report 77-356

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Abstract

The Climax stock is a composite stock of Cretaceous age, composed of quartz monzonite and granodiorite, which intrudes sedimentary rocks of Paleozoic and Precambrian age. Tertiary rocks consisting of tuff, welded tuff, and breccia overlie the stock and sedimentary rocks. Hydrothermal alteration of the granodiorite and quartz monzonite is found mainly along the joints and is extensive, but the intensity of alteration varies from place to place. The surrounding sedimentary rocks (carbonates) have been metasomatically altered to tactite and marble as much as 1,500 feet (457 m) from contact with stock; the degree of metamorphism decreasing away from the intrusive. The major faults found in the vicinity of the Climax stock are the Tippinip fault, the Boundary fault, and the Yucca fault. In the stock three prominent joint sets and their average attitudes are N. 32? W., 22? NE.; N 64? W., vertical; and N 35? E., vertical. Two major tunnel complexes have been driven into the Climax stock?the Tiny Tot tunnel complex and Pile Driver-Hard Hat tunnel complex. In the Pile Driver-Hard Hat complex two underground nuclear tests have been conducted.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Summary of the geology and physical properties of the Climax Stock, Nevada Test Site
Series title:
Open-File Report
Series number:
77-356
Edition:
-
Year Published:
1977
Language:
ENGLISH
Publisher:
U.S. Geological Survey,
Description:
ii, 27 p. :ill., maps (some fold. in envelope) ;27 cm.; (25 p., 2 sheets - PGS)