 | | Book | | n3 GEOLOGY OF THE PORPHYRY COPPER DEPOSITS Southwestern North America oe â â MohBy yy a i;... ¢ ¢ ¢ GEOLOGY OF THE PORPHYRY COPPER DEPOSITS Southwestern North America Edited by SINCE RoR EEL...research related to many of the problems of porphyry copper deposits. He is a fellow of the Geological Society...his undergraduate work at the Colorado School of Mines and earned the doctorate from the University of...Bureau of Mines. He arrived in Arizona in 1918, with a B. S. degree from the Missouri School of Mines. After |  | | Journal (article/letter/editorial) | | CLAY ALTERATION IN COPPER DEPOSITS ASSOCIATED WITH GRANODIORITES by CHARLES MEYER University of California...K-rich biotite assemblage in numerous porphyry coppers as emphasized by Anderson, Gilluly, Creasey, and...and Rose. In Butte, and in some of the porphyry coppers, the assemblage is demonstrably earlier than the...argillic alteration, where illite, kaolinite, montmorillonite, and locally allophane and pyrophyllite are...K-mica, (2) albite to montmorillonite, (3) silica-rich illite or montmorillonite to kaolinite, and (4) |  | | Journal (article/letter/editorial) | | specificgravity is given for the fresh rock. In "porphyry"coppers thisis normallyhigherthanthe ore and if soat Ajo...changefrom supergene processessave an enrichmentof copper. The abundantpertinentdata on veinswill not be...nearly conclusivein the caseof the "porphyry" coppers,sincein the rock fabric the distance between blocks...commonlybrecciated.This is taught by experiencewith wet mines. (2) The basictype of alterationis characterized...illustratedin the finer fabric of some of the "porphyry" coppers. Silica is lost from the interior of the breccia |  | | Report (issue) | | PORPHYRY COPPER DEPOSITS OF THE WORLD: DATABASE, MAPS, AND PRELIMINARY ANALYSIS By Donald A. Singer,...Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, firm...porphyry copper deposits. This publication contains a computer file of information on porphyry copper deposits...and tonnage models for three subtypes of porphyry copper deposits, maps showing locations and general ages...developed. Porphyry copper deposits consist of stockwork, disseminated, and breccia-hosted copper mineralization |  | | Book (edition) | | 345 References, 347 Index, 379 Orthomagmatic copper-nickel-iron (-platinoid) deposits associated with...particularly grateful to the many lecturers in North America and the UK who returned my questionnaire...by Professor Peter Scott of Camborne School of Mines in Cornwall, and Professor Ansel Dunham and Mr Michael...Exportateurs de Cuivre (Intergovernmental Council of Copper Exporting Countries) EEe FOB MEC OECD OPEC PGM... chalcopyrite and galena from which we extract copper and lead respectively, and many authors use this |  | | Journal (issue) | | Articles on specimen-producing locali ties, quarries, mines, and mining districts of the past and present will...was man ager at both the Perkiomen and Wheatly mines. He was a very good mineralogist and I suspect he...I found this mineral in a Piedmont silver-lead-copper-zinc deposit in Northern Virginia a few years ago...Bindheimite is a probable from Phoenixville and Perkiomen mines, and Iâm sure I have samples of yellow earthy minerals...foreign. Azurite, wulfenite, angle site, native copper, brochantite and many others available. Send us |  | | Journal (article/letter/editorial) | | 12167 Thematic Article Potential for Porphyry Copper Deposits in Northern hoku (or the Exploration...Akita, Japan Abstract There are no known porphyry copper deposits in Japan. Attempts were made in the past...magmaticâhydrothermal systems. Is it possible that porphyry copper systems are incompatible with the volcanoplutonic...the established model for the genesis of porphyry copper systems not completely correct, or is it that the...consider the potential for the existence of porphyry copper deposits mainly from an empirical and practical |  | | Journal (issue) | | detected clay minerals, chiefly nontronite, montmorillonite, and cblorite, in several locations (Poulet...3:07 (UTC) on December 12, 2006, near 21.9 degrees north latitude, 78.2 degrees east longitude. The image... ation outcrops contain Al clays, such as montmorillonite. The nontronite-rich units appear to be covered...from the smecrite or volcanic ash then formed montmorillonite, illite, kaolinite, and even hydrated silica...Ownership: Excalibur Mineral Corporation, 1000 North Division Street, Peekskill, NY 10566-1830. Publisher: |  | | Journal (article/letter/editorial) | | submarine formation of some Melanesian porphyry copper deposits" stable isotope evidence Allan R. Chivas...sericites and kaolinites from four young porphyry copper deposits (Ok Tedi (1.2 Ma) and Yandera (6.5 Ma)...the stable isotope systematics of p o r p h y r y copper deposits have d e m o n strated that the h y d...situation applies to the P a n g u n a p o r p h y r y copper deposit o n Bougainville Island, although stable...present study of M e l a n e s i a n p o r p h y r y copper deposits we investi- 327 gate the evidence for |  | | Book | | percent of the world total for many substances (iron, copper, fertilizer chemicals, etc.), is becoming more...in the United States 4 Iron and Steel Aluminum Copper Zinc Lead Manganese Magnesium Chromium 95 98 102...important for so1ne metal ore deposits such as copper and molybdenum. The Bowen reaction series is important...is norite, which is commonly enriched in nickel, copper, and cobalt. 11 SEDIMENTARY ROCKS Syenites...or underground methods. If, as with uranium or copper, the ore minerals can be dissolved in place by |  | | Book | | constitute a sizable deposit for such metals as copper, lead, and zincârequires only that the amount of...solutions. Exceptions come immediately to mind. The copper deposits of Michigan are an outstanding example:...longcontroversial deposits, it seems clear that the source of copper was in the basalt flows or in a body of gabbro...may reasonably be assumed at depth, and that the copper, in part at least, was moved considerable distances...distances by fluids. Any hypothesis alleging that the copper has come from a different source, and that its |  | | Book (edition) | | Platinum, 1+75 13. The Nonferrous Metals 481 Copper, 1+81; Lead and Zinc, 527; Tin, 51+6; Aluminum...increased 100-fold, of mineral fuels 75-fold, and of copper, 63-fold. Those countries abundantly supplied with...geology to mineral finding in districts of waning mines. His knowledge is sought also by the metallurgist...two parts: metalliferous deposits, such as gold, copper, iron, or nickel (Part II) ; and nonmetallic substances...time Neolithic man became acquainted with gold and copper, he also used nephrite, sillimanite, and turquois |  | | Journal (article/letter/editorial) | | geology suggestthat it is exemplary of the porphyry copper depositgroup. To test that idea and to evolve three-dimensional...the table indicatesthat the "typical" porphyry copper deposit is eraplaced in late Cretaceous sediments...(quartz-sericite-pyrite), argillic (quartz-kaolin-montmorillonite),and propylitic (epidote--calcite-chlorite)...data from 27 A porphyrydepositis here definedas a copper major porphyrycopperand molybdenum depositsin and/or...and/or molybdenumsulfidedepositconsistingof North and SouthAmerica. Most significantis the disseminated |  | | Journal (article/letter/editorial) | | Andacollo copperâgold district, La Serena, Chile: preliminary data from the porphyry copper and possible...concentrated on copper and gold. These metals are mined, respectively, from a porphyry copper deposit and...presented and possible relationships between the copper and gold deposits are analysed. Geology of district...district is mostly confined to a fault-bounded, northâsouth depression partially filled with Tertiary...Cerro Toro 680 (base) Copperâgold veins Manto and vein gold deposits; porphyry copper Gold veins Manto and |  | | Journal (article/letter/editorial) | | less regular and well defined in the " porphyry copper " deposits than in the vein deposits such as those...in the porphyries t h a t contain disseminated copper deposits. Veinlets of saeeharoidal quartz or quartz...(Anderson, 1950), and in m a n y other " porphyry coppers." Narrow quartz veinlets which contain little or...addition to the molybdenite. I n a few areas in the north-central part of the district, pyrite is the most...ve~nlets are also very common in the porphyry coppers. As at Butte, the quartz-molybdenite veinlets m |  | | Journal (issue) | | shows in Tucson, Denver, Munich and Ste-Marie-aux-Mines Tel.: 949-494-5155 ⢠www.kristalle.com ⢠Email:...Email: info@kristalle.com Harz Mountains, Germany by GĂźnter Grundmann Thomas P. Moore Wendell E. Wilson...COVER: PROUSTITE, 3.5 cm, from St Andreasberg. Germany, found in 1899; ex collection of Richard Baldauf...District, Western Harz Mountains, Niedersachsen, Germany ........................... 300 by G. Grundmann...District Western Harz Mountains Niedersachsen, Germany GĂźnter Grundmann Eschenweg 6 D-32760 Detmold grundmann |  | | Book | | the United States of North America, its dependencies and Canada by Elsevier North Holland Inc Set by...with basic and ultrabasic rocks, 77 Orthomagmatic copper-nickel-iron (-platinoid) deposits associated with...are chalcopyrite and galena from which we extract copper and lead respectively, and important among industrial...governmentâs reluctance to allow large isolated have mines or mine a because ment unemploy into plunged communities...simply the unwanted in which the usually intergrown. Mines commonly possess mineral dressing plants minerals |  | | Book | | Allen & Unwin Australia Pty Ltd, 8 Napier Street, North Sydney, NSW 2060, Australia First published in 1983...on 12 point Melior by Computape (Pickering) Ltd, North Yorkshire and printed in Great Britain by Richard...::::'.- o I ⢠Sweden ustra ,a ⢠Denmark W . Germany ⢠2 ⢠Austria ⢠A New Zealand ⢠⢠Switzerland...1949 1969 1978 100 .-+:::'. ~ C t) ,._ :J 0 North America 48300 42000 Middle East 332800 369600 ...of extraction techniques capable of dealing with copper ores averaging less than 1 % Cu opened up the possibility |  | | Book | | Turkey, Cyprus, Israel, Jordan, Egypt, Tunisia, North America, and China. Many of these found their way...Turkey, Cyprus, Israel, Egypt, Tunisia, China, and North America. The word âlithologyâ appears in boldface.... . . . . . . . . . . . . . . . 152 7.4 Native Copper (Cu) . . . . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . . 154 7.5 Other Copper Minerals . . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . . 158 7.5.1 The Copper Ore Minerals . . . . . . . . . . . . . . . . . |  | | Book (edition) | | , ' . â˘, ,.⢠⢠t --â˘- """"" ' The Lornex copper-molybdenum mine and plant, Highland Valley, British...Bibliography: p. Includes index. I. Geology, Economic. 2. Mines and mineral resources. I. Bateman, Alan Mara, joint...many exploration geologists as there are in all of North America. The organization of the first two editions...corrected and updated the material on the Zambian Copper Belt. In addition, detailed critical reading of...ago, the rate of increase in the consumption of copper and iron was directly proportional to the increase | | | Journal (article/letter/editorial) | | Implication ăťć č¤ é 复 Including for Freezing Native Coppers of Optimum (2) Hydrocarbon-bearing Their ăťčĺˇ...anorthite and labradorite megacrysts containing native coppers, as described in Part 1, in basaltic rocks, from...island arc and in the western continental margin of North America, respectively. A finding of Muntz metal...rule in nature. Concerning the genesis of native coppers coexistent with the hydrocarbon, the exsolution...suggested and can account for crystal growth of native coppers based on the theory of Ostwald ripening. While |  | | Journal (article/letter/editorial) | | Project. In common withseveral othermajorporphyry copper deposits in theregion,E1Abra is relatedto a regionalstructure...mineralizationrelated to potassicalterationsexhibit high copper/ironratios,with increasingiron in time. The da...been interpreted as a deep exposureof a porphyry copper due to erosion of upper zones. A multiple intr...located in E1 Loa Province, Chile, 42 kilometers north of the Chuquicamataopen-pit mine (Fig. 1). It is..., 1062 GEOLOGY OF THE EL â˘tBR.4 PORPHYRY i COPPER DEPOSIT 1063 ii ½1'tlLĹ 7'OCOPI LLA ,'A MA |  | | Journal (article/letter/editorial) | | Porphyry Copper Deposits R. H. Sillitoe Department of Mining Geology, Royal School of Mines, Imperial...Consort Road, London SW7 2BP, England Porphyry copper deposits carrying more than 0.4 gin/ton gold are...content are likely to have developed in porphyry copper systems at or near to their present sites in the...has become generally accepted that most porphyry copper deposits may be divided into two categories depending...molybdenum values in some island arc porphyry coppers (Titley, 1978), it seems generally to be true that |  | | Book | | economic geologists worldwide, considering that copper was first mined about 3000 years ago on the island...influenced the discussion of oreforming processes for copper-zinc-Iead sulfides in sedimentary and volcanic...on Ore Deposits in Aachen, Federal Republic of Germany, September 16-19, 1985. Base metal sulfide deposits...and Kuroko-type, Iberian Pyrite Belt and Turkish copper deposits, in addition to sulfide ore deposits in...Genesis of Kupferschiefer Mineralization in West Germany F.-P. Schmidt and G. Friedrich (with 24 Figures) |  | | Book | | a â | Âť tes MINES AND MINERALS OF THE GREAT AMERICAN RIFT (COLORADO-NEW MEXICO) Sine â_â<...Bie. WA âRIM. - Bake TARO OC ARC RO2MINES AND MINERALS OF THE GREAT AMERICAN RIFT (COLORADO-NEW...Cataloging in Publication Data Holmes, Richard Walker. Mines and minerals of the Great American Rift (Colorado-New...Bibliography: p. Includes index. 1. Mines and mineral resourcesâColorado. 2. Mines and mineral resourcesâNew Mexico...this book is to preserve information about the mines and minerals of the Great American Rift in New Mexico |
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