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The Alaska Mineral Resource Assessment Program: Background

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The Alaska Mineral Resource Assessment Program: Background ~IRC. 1046 U.S. GEOLOGICAL SURVEY CIRCULAR 1046 The Alaska Mineral Resource Assessment Program: Background Information to Accompany Folio of Geologic and Resource Maps of the Ugashik, Bristol Bay, and Western Part of Karluk Quadrangles, Alaska AVAILABILITY OF BOOKS AND MAPS OF THE U.S. GEOLOGICAL f URVEY Instructions on ordering publications of the U.S. Geological Survey, along with prices of the last offerings, are given in the cur­ rent-year issues of the monthly catalog "New Publications of the U.S. Geological Survey." Prices of available U.S. Geological Sur­ vey publications released prior to the current year are listed in the most recent annual "Price and Availability List" Publications that are listed in various U.S. Geological Survey catalogs (see ba ck inside cover) but not listed in the most recent annual "Price and Availability List" are no longer available. Prices of reports released to the open files are given in the listing "U.S. Geological Survey Open-File Reports," rodated month­ ly, which is for sale in microfiche from the U.S. Geological Survey, Books and Open-File Reports Section, FedeH Center, Box 25425, Denver, CO 80225. Reports released through the NTIS may be obtained by writing to the National Technical Information Service, U.S. Department of Commerce, Springfield, VA 22161; please include NTIS report number with inquiry. Order U.S. Geological Survey publications by mail or over the counter from the offices given below. BY MAIL OVER THE COUNTER Books Books Professional Papers, Bulletins, Water-Supply Papers, Techniques of Water-Resources Investigations, Circulars, publications of general in­ Books of the U.S. Geological Survey are available over the terest (such as leaflets, pamphlets, booklets), single copies of Earthquakes counter at the following Geological Survey Public Inqrmes Offices, all & Volcanoes, Preliminary Determination of Epicenters, and some mis­ of which are authorized agents of the Superintendent cf Documents: cellaneous reports, including some of the foregoing series that have gone out of print at the Superintendent of Documents, are obtainable by mail from WASHINGTON, D.C.-Main Interior Bldg., 2600 corridor, 18th and CSts.,NW. UJS. Geological Survey, Books and Open-File Reports DENVER, Colorado-Federal Bldg., Rm. 169, 1961 Stout St. Federal Center, Box 25425 LOS ANGELES, California-Federal Bldg., Rn. 7638, 300 N. Denver, CO 80225 Los Angeles St. MENLO PARK, Californla-Bldg. 3 (Stop 533; Rm. 3128, Subscriptions to periodicals (Earthquakes & Volcanoes and 345 Middlefield Rd. Preliminary Determination of Epicenters) can be obtained ONLY from RESTON, Virginia-503 National Center, Rm. 1C402, 12201 the Sunrise Valley Dr. SALT LAKE CITY, Utah-Federal Bldg., Rm. 8105, 125 Superintendent of Documents South State St. Government Printing Office SAN FRANCISCO, California-Customhouse, Rm. 504, 555 Washington, D.C. 20402 Battery St. SPOKANE, Washington-US. Courthouse, Rm. 678, West (Check or money order must be payable to Superintendent of Docu­ 920 Riverside Ave.. ments.) ANCHORAGE, Ataska-Rm. 101, 4230 University Dr. ANCHORAGE, Alaska-Federal Bldg, Rm. E-146, 701 C St. Maps For maps, address mail orders to ILS. Geological Survey, Map Distribution Maps Federal Center, Box 25286 Maps may be purchased over the counter at th** U.S. Geologi­ Denver, CO 80225 cal Survey offices where books are sold (all addresses ir above list) and at the following Geological Survey offices: Residents of Alaska may order maps from ROLLA, Missouri-1400 Independence Rd. Alaska Distribution Section, U.S. Geological Survey, DENVER, Colorado-Map Distribution, Bldg. 810, Federal New Federal Building - Box 12 Center 101 Twelfth Ave., Fairbanks, AK 99701 FAIRBANKS, Alaska-New Federal Bldg., 101 Twelfth Ave. The Alaska Mineral Resource Assessment Program: Background Information to Accompany Folio of Geologic and Resource Maps of the Ugashik, Bristol Bay, and Western Part of Karluk Quadrangles, Alaska By R.L. DETTERMAN, J.E. CASE, S.E. CHURCH, J.G. FRISKEN, F.H. WILSON, and M.E. YOUNT U.S. GEOLOGICAL SURVEY CIRCULAR 1046 DEPARTMENT OF THE INTERIOR MANUEL LUJAN, JR., Secretary U.S. GEOLOGICAL SURVEY Dallas L Peck, Director 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 UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1990 Library of Congress Cataloging-in-Publication Data The Alaska Mineral Resource Assessment Program. (U.S. Geological Survey circular; 1046) Includes bibliographical references (p. ). Supt. of Docs, no.: I 19.4/2:1046 1. Geology Alaska Alaska Peninsula. 2. Mines and mineral resources- Alaska Alaska Peninsula. 3. Alaska Mineral Resource Assessment Program. I. Detterman, Robert L II. Series. QE84.A34A43 1990 553'.09798 90-3121 CONTENTS Abstract 1 Introduction 1 Purpose and scope 1 Geography and access 1 Summary of mineral and petroleum investigations 3 Acknowledgments 4 Geologic investigations 5 Previous investigations 5 Present investigation 5 Description of component folio maps 6 Geology (MF-1539-A) 6 Megafossil data (MF-1539-B) 7 Bedrock geochemistry (MF-1539-C) 7 Aeromagnetic map and interpretation (MF-1539-D) 8 Regional gravity anomalies 8 Geochronology and major-element geochemistry (MF-1539-E) 8 Geochemistry (MF-1539-F, -G, -H) 9 Stream sediments 9 Pan concentrates 9 Mineralogy 9 Mineral and energy resource assessment (MF-1539-I) 9 Bulletins 10 Stratigraphic clarification of the Shelikof Formation, Alaska Peninsula (1537-A) 10 Petrography, chemistry, and geologic history of Yantarni volcano, Aleutian volcanic arc, Alaska (1761) 10 Interpretation of exploration geochemical data from the Ugashik, Bristol Bay, and western Karluk quadrangles, Alaska (1858) 11 References 11 FIGURES 1. Location map showing study area on the Alaska Peninsula 2 2. Map of study area showing geographic features and physiographic provinces 3 3. Map of study area showing claims, prospects, exploratory wells, and areas of potential mineralization 4 TABLES 1. Component maps of the Ugashik, Bristol Bay, and western part of Karluk quadrangles, Alaska 2 2. Data on exploratory wells drilled for petroleum in the Ugashik and western part of Karluk quadrangles 5 Contents III The Alaska Mineral Resource Assessment Prograpn: Background Information to Accompany Folio of Geologic and Resource Maps of the Ugashik, Bristol Bay, and Western Part of Karluk Quadrangles, Alaska ayR.L Detterman, J.E. Case, S.E. Church, J.G. Frisken, F.H. Wilson, andM.E. Yount Abstract Program (AMRAP) by a multidisciplinary team of earth scientists. Field and laboratory studies were conducted The Ugashik, Bristol Bay, and western part of Karluk between 1979 and 1982. quadrangles (1:250,000) are a part of the Alaska Peninsula in The folio consists of nine maps that provide infor­ southwestern Alaska. This circular, in conjunction with a mation on the geology, geochemistry, geophysics, geo­ companion folio of MF-series maps, two l-series geologic maps, and three bulletins, represents the results of integrated chronology, paleontology, and mineral resource^1 of the field and laboratory studies on the geology, geophysics, quadrangles (table 1). The primary intent of the folio and geochemistry, paleontology, geochronology, and mineral circular is to furnish mineral and energy resource data resources of the quadrangles. These studies were undertak­ for land-use planning and long-term national resource en to provide a modern assessment of the mineral and policy decisions. Additional aims are to determine the energy resources of the quadrangles. Each map contains time and type of mineral emplacement and to increase descriptive text, explanatory material, tables, diagrams, and the geologic knowledge of an actively accreting continen­ pertinent references. This circular provides background in­ tal margin and volcanic arc. formation for the mineral resource assessment map This circular contains references relevant to the (MF-1539-l) and integrates the component MF-and l-series Ugasik, Bristol Bay, and western part of Karluk quad­ maps. A comprehensive bibliography cites both specific and rangles. Individual maps of the folio contain additional general references relevant to the geology and resources of the quadrangles. references applicable to their subject matter. In addition to the folio maps, which are printed in black and white, two companion multicolor Miscella­ neous Geologic Investigations Series Maps (Detterman INTRODUCTION and others, 1987a, b) have been published. Topical studies conducted during the investigations also resulted Purpose and Scope in three bulletins (Allaway and others, 1984; Riehle and This circular and the companion folio of related others, 1987; Church and others, 1989b), one masters maps are a part of a series of U.S. Geological Survey thesis (Allaway, 1982), two circular articles (Defra and reports designed to provide an inventory of Alaska's others, 1981; Allaway and Miller, 1984), and five open- mineral resources. The reports furnish information for file reports (Detterman and others, 1980, 1981K 1982; mineral and energy policy-making decisions by Federal Wilson, 1982; Wilson and O'Leary, 1986). and State governments, native corporations, and industry concerning the future use of Alaskan land and resources. This report and the folio of maps were prepared under Geography and Access the auspices of the Alaska Mineral Resource Assessment The Ugashik, Bristol Bay, and western part of the Karluk quadrangles encompass about 12,670 km2 (4,892 mi2)
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