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Open-File Report 2009–1144

Complete Analytical Data for Samples of Jurassic Igneous Rocks in the Bald Mountain Mining District, Nevada

By Edward A. du Bray

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Abstract

This report presents all petrographic, major oxide, and trace element data for a set of 109 samples collected during an investigation of Jurassic igneous rocks in the Bald Mountain mining district, Nevada. Igneous rocks in the district include the Bald Mountain stock, quartz-feldspar porphyry dikes, basaltic andesite dikes, aplite sills, and rare lamprophyre dikes. These rocks, although variably altered near intrusion-related mineral deposits, are fresh in many parts of the district. Igneous rocks in the district are hosted by Paleozoic sedimentary rocks.

First posted July 23, 2009

For additional information contact:

Team Chief Scientist, USGS Central Mineral Resources
Box 25046, Mail Stop 973
Denver, CO 80225

http://minerals.cr.usgs.gov/

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Suggested citation:

du Bray, E.A., 2009, Complete analytical data for Jurassic igneous rocks in the Bald Mountain mining district, Nevada: U.S. Geological Survey Open-File Report 2009–1144, 9 p.



Contents

Introduction

Analytical Methods

Acknowledgments

References Cited


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