Table of Contents - SPE205: The Geology and Geochemistry of Cenozic Topaz Rhyolites from the Western United States

Acknowledgments

Abstract

Introduction

Cenozoic topaz rhyolites from the western United States

Thomas Range, west-central Utah
Spor Mountain, west-central Utah
Honeycomb Hills, west-central Utah
Smelter Knolls, west-central Utah
Keg Mountain, west-central Utah
Mineral Mountains, western Utah
Wah Wah Mountains and vicinity, southwestern Utah and southeastern Nevada
Wilson Creek Range, southeastern Nevada
Kane Springs Wash, southeastern Nevada
Topaz rhyolites in the eastern Great Basin: A summary
Cortez Mountains, north-central Nevada
Sheep Creek Range, north-central Nevada
Jarbidge, northern Nevada
Blackfoot lava field, southeastern Idaho
Elkhorn Mountains, western Montana
Little Belt Mountains, central Montana
Specimen Mountain, north-central Colorado
Chalk Mountain, central Colorado
Nathrop, central Colorado
Silver Cliff-Rosita, central Colorado
Tomichi Dome, central Colorado
Boston Peak, central Colorado
Lake City, southwestern Colorado Topaz rhyolites in Colorado: A summary
East Grants Ridge, west-central New Mexico
Black Range, southwestern New Mexico
Saddle Mountain, eastern Arizona
Burro Creek, western Arizona

Other "topaz rhyolite" occurrences

Other Cenozoic occurrences, western United States
Mexican topaz rhyolites
Precambrian topaz rhyolites

Principal characteristics of topaz rhyolites

Distribution and ages
Mode of emplacement
Mineralogy
Fe-Ti oxides and titanite
Feldspar
Mafic silicates Geochemistry and differentiation trends
Isotopic composition
Magma-tectonic setting
Ore deposits
Beryllium
Climax-type molybdenum deposits
Tin
Uranium
Fluorite

Comparison with other types of rhyolitic rocks

Calc-alkaline rhyolites
Peralkaline rhyolites
Aluminous bimodal rhyolites
Ongonites

Petrogenetic model for topaz rhyolites

References cited