Geologic Studies in Alaska by the U.S. Geological Survey, 1992

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U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY Robert M. Hirsch, Acting Director For sale by Book and Open-File Report Sales U.S. Geological Survey Federal Center, Box 25286 Denver, CO 80225 Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government. COVER: Geologist Julie Dumoulin examines Cambrian carbonate rocks exposed in the Baird Mountains quadrangle, western Brooks Range. Proterozoic(?) and lower Paleozoic carbonate rocks are exposed in the background. Two papers by Dumoulin and others in- cluded in this volume discuss younger Paleozoic rocks exposed in the west-central Brooks Range. Photograph by Alison B. Till.
CONTENTS Introduction Cynthia Dusel-Bacon and Alison B. Till ............................................................................ NORTHERN ALASKA Late Holocene Longitudinal and Parabolic Dunes in Northern Alaska: Preliminary Interpretations of Age and Paleoclimatic Significance John P. Galloway and L. David Carter ............................................................................... Deep-Water Lithofacies and Conodont Faunas of the Lisburne Group, West- Central Brooks Range, Alaska Julie A. Dumoulin, Anita G. Harris, and Jeanine M. Schmidt .......................................... Lithofacies and Conodonts of Carboniferous Strata in the Ivotuk Hills, Western Brooks Range, Alaska Julie A. Dumoulin and Anita G. Harris .............................................................................. Depositional Sequences in Lower Cretaceous Rocks, Atigun Syncline and Slope Mountain Areas, Alaskan North Slope Christopher J. Schenk and Kenneth J. Bird ........................................................................ U-Pb Ages of Zircon, Monazite, and Sphene from Devonian Metagranites and Metafelsites, Central Brooks Range, Alaska John N. Aleinikoff, Thomas E. Moore, Marianne Walter, and Warren J. Nokleberg ....... Appeal for Nonproliferation of Escalating Terrane Nomenclature Susan M. Karl and Charles G. Mull ................................................................................... SOUTHWESTERN ALASKA Favorable Areas for Metallic Mineral Resources in and near the Horn Mountains, Sleetmute Quadrangle, Southwestern Alaska John E. Gray, Peter M. Theodorakos, Leon A. Bradley, and John H. Bullock, Jr. ........... Gold and Cinnabar in Heavy-Mineral Concentrates from Stream-Sediment Samples Collected from the Western Half of the Lime Hills lo x 3" Quadrangle, Alaska Robert G. Eppinger ............................................................................................................. SOUTH-CENTRAL ALASKA Early Cenozoic Depositional Systems, Wishbone Hill District, Matanuska Coal Field, Alaska Romeo M. Flores and Gary D. Stricker .............................................................................. Reservoir Framework Architecture in the Clamgulchian Type Section (Pliocene) of the Sterling Formation, Kenai Peninsula, Alaska Romeo M. Flores and Gary D. Stricker .............................................................................. Geochemistry of Ophiolitic Rocks from Knight Island, Prince William Sound, Alaska Steven W. Nelson and Matthew S. Nelson ......................................................................... Structural Evolution of the Chugach-Prince William Terrane at the Hinge of the Orocline in Prince William Sound, and Implications for Ore Deposits Peter J. Haeussler and Steven W. Nelson ...........................................................................
Page 1: Geologic Studies in Alaska by the U
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Page 9 and 10: LATE HOLOCENE LONGITUDINAL AND PARA
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LITHOFACIES AND CONODONTS OF CARBON
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DEPOSITIONAL SEQUENCES IN ATIGUN SY
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U-Pb AGES OF ZIRCON, MONAZITE, AND
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APPEAL FOR NONPROLIFERATION OF ESCA
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FAVORABLE AREAS FOR METALLIC MINERA
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GOLD AND CINNABAR IN HEAVY-MINERAL
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EARLY CENOZOIC DEPOSITIONAL SYSTEMS
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EARLY CENOZOIC DEPOSITIONAL S YSTEM
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RESERVOIR FRAMEWORK ARCHITECTURE, C
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GEOCHEMISTRY OF OPHIOLITIC ROCKS FR
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GEOLOGIC STUDIES IN ALASKA BY THE U
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Table 1. Isotopic ages of intrusive
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Table 1. Isotopic ages of intrusive
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GEOCHEMICAL EVALUATION OF STREAM-SE
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Table 3. Summary of geochemical sig
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GEOCHEMICAL CHARACTER OF UPPER PALE
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RECONNAISSANCE GEOCHEMISTRY OF BASA
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OSTRACODE ASSEMBLAGES FROM MODERN B
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RUBIDIUM-STRONTIUM ISOTOPIC SYSTEMA
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RUBIDIUM-STRONTIUM ISOTOPIC SYSTEMA
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US. GEOLOGICAL SURVEY REPORTS ON AL
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U.S. GEOLOGICAL SURVEY REPORTS ON A
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U.S. GEOLOGICAL SURVEY REPOR TS ON
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REPORTS ABOUT ALASKA IN NON-USGS PU
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REPORTS ABOUT ALASKA IN NON-USGS PU
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Geologic Studies in Alaska by the U.S. Geological Survey, 1992

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