 | | Report (volume) | | -.--Early andesite eruption .................... -------------.___._---____ Later andesite eruption ...the early andesite.................. Distribution and characteristics of the later andesite.............---..-.. Mineralization subsequent to the early andesite intrusion.............. Mineralization subsequent...-----.-.--.---.-..-.--. Vein groups of the' early andesite mineralization..--...---.--...-..--..... Occurrence... ILLUSTRATIONS. PLATE I. Geologic map of Tonopah mining district........................ FIG. 1. Plan of portion |  | | Report (issue) | | Steeple Rock and Duncan mining districts, Grant and Hidalgo Counties, New Mexico, and Greenlee County, Arizona...imply endorsement by the U.S. Government. Denver, Colorado CONTENTS Page Location......................... Mining districts, mines, and mineralization............................. Steeple Rock district......subdistrict................................... Duncan district.................................................principal mines and prospects in the Steeple Rock and Duncan mining districts.. Aeromagnetic map of Brushy |  | | Report (issue) | | org/details/reportofstatemin15cali CALIFORNIA STATE MINING BUREAU FERRY BUILDING, SAN FRANCISCO ^LETCHER...Statement xxiii Participation of the California State Mining Bureau in the Panama-Pacific International Exposition...Features I. Alpine County. 5 6 6 , Mining Districts The Mogul and Monitor Districts Rock Formations of...Hercules Company 14 23 Silver Mountain District Silver King District Mineral Water Grover's Hot Springs...27 27 27 , , Bibliography Chapter II, Inyo County. Introduction and Acknowledgments Location and |  | | Report (volume) | | Early, Middle, and Late, and fo'!' epochs. Informal rock terms lover 1 middle 1 and upper may be used where...of all words used in forming the names of formal rock-stratigraphic units be capitalized. The Commission's...or "late", as used by an author with the age of rock units, is changed to "lower" or "upper." The age...74, Ph miles east of Dutchtown, Cape Girardeau County, Mo. Type section cut by northtrending fault with...stream in NEIA sec. 33, T. 16 N., R. 14 E, Wayne County. Named after village of Abington, about 3 miles |  | | Journal (issue) | | NUMBER 11 NOVEMBER 1984 OIL AND GAS NEWS Columbia County - Mist Gas Field Governing Board Donald A. Haagensen.... . . . . . . . . . .. Donald A. Hull Douglas County Deputy State Geologist. . . . . . . . . . . ....523-3133. Howard C. Brooks, Resident Geologist Lane County Published monthly by the Oregon Department of...Buck 44-16 T. 5 S .. R. 2 W 36-047-00016 Marion County Location; 3,500. 274 Oregon Nat. Gas Dev. Corp...Cunningham 32-21 T. 5 S., R. 2 W 36-047-00017 Marion County Location; 3,500. 275 Oregon Nat. Gas Dev. Corp |  | | Journal (volume) | | Mountain caldera, Ochoco National Forest, Crook County, Oregon 25 Field trip guide to the Oligocene Crooked...Crooked Basin and the ancestral Crooked River, Crook County, Oregon 73 Portland, Oregon, geology by tram, train...Baker City field office is relocating to the Baker County Court House. We have also moved the Nature of the...are the Oregon Lidar Consortium and the FEMA Coos County Multi-hazards Mapping Program. Both programs underscore...oregongeology.org Baker City Field Office: Baker County Courthouse, 1995 3rd Street, Baker City, Oregon |  | | Journal (article/letter/editorial) | | 2003, pp. 409–424 Geology of the Ivanhoe Hg-Au District, Northern Nevada: Influence of Miocene Volcanism...89557-0047 Abstract The mercury-gold deposits of the Ivanhoe mining district in northern Nevada formed when...formed at and near the paleosurface, and disseminated gold deposits and high-grade goldsilver veins formed...nearby volcanism. The eruption of rhyolite and andesite flows and domes periodically disrupted the lacustrine...soft-sediment deformation in the lakebeds. Mercury-gold mineralization was coeval with rhyolite volcanism |  | | Report (issue) | | 31 University of Nevada Press, Reno, Nevada 89557 USA Copyright © 2004 by University of Nevada Press Photographs...copyright © 2004 unless otherwise noted Map of Mining Districts and significant mineral occurrences of...Olivenite, 1.6-cm cluster, Majuba Hill Mine, Antelope district, Pershing County. N. Prenn collection. Photograph...production of environmental protection equipment. Mining and the discovery, identification, and development...to Nevada in 1929 and was actively involved in mining in the state and the western U.S. for the rest | | | Report (issue) | | 3i University of Nevada Press, Reno, Nevada 89557 USA Copyright© 2004 by Uni versity of Nevada Press Photographs...te, r.6-cm cluster, Majuba Hill Mine, Antelope district, Pershing County. N. Prenn coJlection. Photograph...percent of the state. Nevada's public lands offer mining, livestock grazing, wild horse viewing, .scenic...Road and Geologic Tours in th<' Las Vegas Area. Mining and the discovery, identification, and development...PART IV PART II MINERAL DEPOSITS Carlin-1:,. pe Gold Depo!:>its (Jresor}' c. Nevada Mineral Catalog |  | | Journal (article/letter/editorial) | | similarity in their structure. The general rock of the district shows itself on both sides of the Rio Barranca...The same general rock is also found beyond Cartago, in the direction of Orosi. The rock is fine-grained...it is not weathered it is tough and difficult to quarry. It has a granular base, and contains crystals...obtained on the mountain-range of Aguacate, near the gold- and silver-mines, show specks of pyrites, and may...of :Espar~o is reached, large boulders of a black rock are frequently seen. They were examined, but were |  | | Report (issue) | | Mesozoic plutonic rocks overlain by Pliocene ( ?) andesite and Pleistocene basalt. Goldstone dry lake is...____________________ ~ __ Tourmaline-quartz-muscovite rock _______ _ Field relations, origin, and age _______________...General features _________ - _______ -------_------_ Rock units of southern and western areas _________ _..._________________ _ Meeke Mine Formation ________________ _ Rock units of central areas ______________________ _...Antelope Butte, Rosamond, and Mojave areas __ Gem Hill Formation ________________ ~_-Bobtail Quartz Latite |  | | Journal (article/letter/editorial) | | homepage: www.elsevier.com/locate/cageo Estimating rock mass properties using Monte Carlo simulation: Ankara...of Mining Engineering, Aksaray University, Adana Road, 68100 Aksaray, Turkey Department of Mining Engineering...2009) is applied to the problem of estimating the rock mass properties of Ankara andesites. For this purpose...(parametric) distributions are described for intact rock and discontinuity parameters of the Ankara andesites...these distributions are included as inputs in the Rock Mass Rating (RMR) classification system prepared |  | | Report (volume) | | ......................................... 2 The rock cycle....................................................................................... 20 Andesite............................................................................... 24 Calc-silicate rock...................................................Cinnabar (mercury ore) and the New Almaden Mining District.................................................................... 28 Layers in sedimentary rock................................................ |  | | Report (issue) | | WALCOTT, DIRECTOR GEOLOGY OF THE TONOPAH MINING DISTRICT, NEVADA BY JOSIAH EDw-ARD SPURR .. . =. ... . . . . . . . -------.---- Description of the rock formations ...... _. ___ . __ .................... . . . . . . . . . . • Earlier andesite (hornblende-biotite-andesite).............................. Appearance................ _... . . . . Later andesite (biotite-augite-andesite) .................................... . . . . . . . . . . . . Relation to earlier andesite . . . . . . . . . . . . . . . . . . . . . . . |  | | Report (issue) | | Geologic Map of the Elk Mountain quadrangle, Cowlitz County, Washington by Russell C. Evarts 1 and Roger P...GEOLOGIC MAP OF THE ELK MOUNTAIN QUADRANGLE, COWLITZ COUNTY, WASHINGTON % Russell C. Evarts and Roger P....correlative with the Wingate Hill Drift, although they could be older. The Wingate Hill Drift mantles the lower...available from the Elk Mountain quadrangle is a whole-rock K-Ar determination of 36.3±2.2 Ma by Phillips and...others (1986) for a glassy basaltic andesite flow exposed in a quarry about 1 km west of Big Bull. Although |  | | Report (issue) | | Development of Infrastructure Resources in Urban Areas— Colorado Front Range Urban Corridor U.S. Geological Survey...Development of Infrastructure Resources in Urban Areas— Colorado Front Range Urban Corridor Things Planners, Decision-Makers...development of infrastructure resources in urban areas—Colorado front range urban corridor : things planners,...Regional planning—Colorado. 2. City planning—Colorado. 3. Infrastructure (Economics)—Colorado—Planning. 4.... Conservation of natural resources—Colorado. I. Knepper, Daniel H. II. Arbogast, B.F. (Belinda F.) III |  | | Book (edition) | | Rs v Engineering News -Record ~ Engineering and Mining Journal-Press Power Chemical and Metallurgical...Enlarged and Entirely Reset Fourth Impression McGRAW-HILL BOOK COMPANY, Inc. NEW YORK: 370 SEVENTH AVENUE...4 ? tj Copyright, 1913, 1919, by the McGraw-Hill Book Company, Inc. • PRINTED IN Till. I Mil...ment—Copper—Lead and zinc — Gold and — Price Iron — Copper—Lead — Zinc —Silver— Gold —Tin, metals— Production...relations of veins Veins in relation to the country rock Vein walls Outcrops Length and depth of veins. |  | | Report (issue) | | Bedrock Geology of the Lake Tapps Quadrangle Pierce County Washington GEOLOGICAL SURVEY PROFESSIONAL PAPER... Bedrock Geology of the Lake Tapps Quadrangle Pierce County Washington By LEONARD M. CARD, JR. GEOLOGIC STUDIES..._--------__---17 Photograph showing xenoliths of andesite in hornblende dacite porphyry.________________________________...BEDROCK GEOLOGY OF THE LAKE TAPPS QUADRANGLE, PIERCE COUNTY, WASHINGTON By LEONARD M. GARD, JR. ABSTRACT Bedrock...of the quadrangle. Only 2,500 feet of Ohanapecosh rock crops out in the quadrangle, although more than |  | | Book | | unfamiliar with the language of petrology. Recent igneous rock definitions published by the International Union...fortyeight in black and white, illustrate selected rock types. A general bibliography is also provided to...Minerals Differ / Major Rock Classes / 2 Rock Nomenclature / 3 Derivation of Rock Names / 4 Bibliography...terms to form a truly comprehensive vocabulary of rock names. In addition to a concise definition for each... He has written it for lay persons, for amateur rock collectors, and for students and professionals in |  | | Report (issue) | | Map and sample numbers Location Geologic unit and rock type Potassium-argon age data Reported ages Recalculated...and numbered by county; each map number identifies a sample location within a county on the index map...longitude. Although the latter have an assigned county number, they are not plotted on the index map and...additional location information. Geologic unit and rock type Dated samples represent rocks with a broad...volcanism. Information concerning geologic units and rock type was extracted from the references and included |  | | Report (issue) | | the Manhattan and Mount Jefferson Calcleras, Nye County, Nevada U,S. GEOLOGICAL SURVEY PROFESSIONAL PAPER...the Manhattan and Mount Jefferson Calderas, Nye County, Nevada By DANIEL R. SHAWE and DAVID B. SNYDER...the Manhattan and Mount Jefferson calderas, Nye County, Nevada. (U.S. Geological Survey professional paper...Breccia Nevada Nye County. 2. Volcanic ash, tuff, etc. Nevada Nye County. County. I. Snyder, David B....................... Middle member of the Round Rock Formation ............................... Rhyolite |  | | Report (issue) | | galena, pyrite, pyrrhotite, and magnetite. Silver, gold, bismuth, tin, cobalt, or other metals may occur...Slack provided data for Bald Mountain, Davis, Ore Hill, and Rosebery; and Norman Page provided data for...arbitrary 500-m limit may combine deposits within a district (e.g. Quemont-Horne), or subdivide a large deposit...containing the deposits are minor units in volcanic rock formations (e.g. Heath Steele). Also included were...expressed in thousands of metric tons. Silver (Ag) and gold (Au) are expressed in metric tons. All of the deposits |  | | Journal (article/letter/editorial) | | for Metavolcanics and Their Metapyroclastics at Gold Deposit of the Mahd Ad Dahab Area, Arabian Shield...com Abstract—The present study focuses on the gold mining in Mahd Ad Dahab region of Saudi Arabia. The...relating gold metallogeny to the evolution of the Arabian Shield. Distribution and localization of gold occurrences...that the metavolcanic rocks at the Mahd Ad Dahab gold mine area can be classified into metabasalt, metaandesite...1134/S107570151309002X 1 INTRODUCTION The Mahd Ad Dahab gold deposit is located 380 km northeast of Jeddah (23°30′30″ |  | Banješević, , Cvetković, , von Quadt, , Ljubović Obradović, , Vasić, , Pačevski, , Peytcheva, (2019) New Constraints on the Main Mineralization Event Inferred from the Latest Discoveries in the Bor Metallogenetic Zone (BMZ, East Serbia) Minerals, 9 (11) 672 doi:10.3390/min9110672 | Journal (article/letter/editorial) | | Vojske Jugoslavije 12, 19210 Bor, Serbia Faculty of Mining and Geology, University of Belgrade, Đušina 7,...Metallogenetic Zone (BMZ), where the world-class copper and gold deposit of Čukaru Peki was recently discovered...genetically related to the first volcanic phase (‘Timok andesite’; 85–90 Ma). However, the data also suggest that...that during this phase, two subgroups of andesite porphyry were formed; they are named volcanic phase...1A (V1A) and volcanic phase 1B (V1B). The V1A andesite (89–90 Ma) is plagioclase-hornblende phyric, holocrystalline |  | | Journal (article/letter/editorial) | | Geology Vol. 99, pp. 917–939 The Falémé Iron District, Senegal M. O. SCHWARTZ† AND F. MELCHER Bundesanstalt...D-30631 Hannover, Germany Abstract The Falémé iron district in the Kedougou-Kéniéba inlier of the Paleoproterozoic...Goto deposits. The ore deposits of the Falémé district are the only major Precambrian magnetite skarn...postore metamorphism. The deposits of the Falémé district have many similarities to Phanerozoic magnetite...igneous magnetite in granodiorite and magnetite in andesite (possibly of igneous origin) by low concentrations |
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