 | | Report (volume) | | Geologic Setting of Gold Occurrences in the Big Canyon Area, El Dorado County, California By ROBERT L. EARHART...Geologic setting of gold occurrences in the Big Canyon area, El Dorado County, California. (U.S. Geological...Bibliography: p. Supt. of Docs. No.: I 19.3:1576 1. Gold areas California El Dorado County. QE75.B9 no. 1576 557.3...of the Big Canyon area 5 Carbonate alteration 9 Gold occurrences 10 Big Canyon mine and related occurrences... Geologic Setting of Gold Occurrences in the Big Canyon Area, El Dorado County, California By Robert L. Earhart |  | | Report (issue) | | Director PROFESSIONAL PAPER 157 ~rlfE ~J.:, MOTHER LODE SYSTEM O~-, CALIFOl-tNIA BY ADOLPfI KNOPF \~..."'::'.'" ., Prepared in cooperation with the California State Mining Bureau ..!' . ,(".1\\. lit ~...Director Professional Paper 157 rfHE MOTHER LODE SYSTEM OF CALIFORNIA BY ADOLPH KNOPF 6-332 (February...(February 1939) Prepared in cooperation with the California State Mining Bureau Class,_ _ _ __ Book _____ GPO..._____________________________________ Output of gold ___ ⢠________ ________ __ ______ ___ ___ _______ |  | | Report (issue) | | STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY GOLD DEPOSITS OF THE WESTERN SIERRA NEVADA Field Trip...Economic Geologists Annual Meeting, Los Angeles, California February, 1984 Open-File Report 84-169 This...Menlo Park, California 2 California Division of Mines and Geology, Sacramento, California INTRODUCTION...source of the bulk of California's past gold production. Although gold mining decreased greatly in the years...and following World War II, dramatic increases in gold prices coupled with advances in extractive techniques |  | | Journal (article/letter/editorial) | | Zone, Sierra Nevada Foothills, California, USA GEORGE V. ALBINO* Corona Gold Inc., 1375 Greg Street, Suite...Suite 105, Sparks, NV, 89431, USA Abstract Albitite, locally aegirine- and riebeckite-bearing, formed as...along the Melones Fault Zone near Jamestown, California. Pyrite, magnetite, hematite and titanite are...assemblages that are typical of gold deposits of the Mother Lode Belt. Alkaline fluids responsible for...sodium metasomatism, fault zone, Sierra Nevada, California. Introduction MAJOR fault zones are commonly |  | | Report (issue) | | V cÂť STATE OF CALIFORNIA DEPARTMENT OF NATURAL RESOURCES GEOLOGY AND MINERAL DEPOSITS OF THE ANGELS...AND TUOLUMNE COUNTIES CALIFORNIA SPECIAL REPORT UN.VwKali^ 0^ 41 CALIFORNIA UAVIS At;-: DIVISION...fornia, by George 1-B. The Calera limestone, California, by George W. Walker. 1950. 8 pp., 1 pi.,...of part of the Delta-Mendota Canal near Tracy, California, by Parry Reiche. 1950. 12 pp., 5 figs. Price...Commercial "black granite" of San Diego County, California, by Richard A. Hoppin and L. A. Norman, Jr. 1950 |  | | Report (issue) | | GEOLOGIC SETTING, CHARACTERISTICS, AND GEOCHEMISTRY OF GOLD-BEARING QUARTZ VEINS IN THE KLAMATH MOUNTAINS IN...IN THE REDDING 1x2 DEGREE QUADRANGLE, NORTHERN CALIFORNIA by Miles L. Silberman1 and Joanne Danielson2...College, Redding, California 96003 Geologic Setting, Characteristics and Geochemistry of Gold-Bearing Quartz...in the Redding 1x2 Degree Quadrangle, Northern California Miles L. Silberman, U.S. Geological Survey, Denver...96003 ABSTRACT More than three million ounces of gold have been produced from several geological terranes |  | | Report (issue) | | Gold Au c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Cubic. Point Group: 4/m 3 2/m...Properties: Opaque in all but thinnest foils. Color: Gold-yellow with a reddish tint when pure, silver-white...Queensland; from Kalgoorlie, Western Australia, with gold telluride ores, also very large alluvial nuggets...Kare, Papua New Guinea. The worldâs most important gold district is the Witwatersrand, Transvaal, South...and Hemlo districts. In the USA, in California, in the Mother Lode belt of the Sierra Nevada, with fine |  | | Report (volume) | | and Geochemistry of Gold Deposits of the Big Canyon Area, El Dorado County, California AVAILABILITY OF...ANGELES, California--Federal Bldg., Rm. 7638, 300 N. Los Angeles St. ⢠MENLO PARK, California--Bldg. 3...Rm. 8105, 125 South State St. ⢠SAN FRANCISCO, California--Customhouse, Rm. 504, 555 Battery St. ⢠SPOKANE...and Geochemistry of Gold Deposits of the Big Canyon Area, El Dorado County, California By J. THOMAS NASH...types of lode gold deposits in metamorphic rocks and their similarities to nearby Mother Lode deposits |  | | Journal (issue) | | Place Tucson, AZ 85741 â Continued on page 111 Gold! Introduction G old notes from the e d i t o r .............. by B. Birch 5 California The history of crystallized gold in C a lif o r n ia ...........otable gold occurrences of G eorgia & A labam a . . . . 65 by R. B. C ook N o rth C arolina gold ........hat's new in gold? Venezuelan gold (by W. E. W ilson) .......................... 89 A rizona gold (by W. E...89 Siberian gold (by W. E. W ilson) ................................. 89 C alifornia gold (by D. L e ic |  | Groves, D.I, Goldfarb, R.J, Gebre-Mariam, M, Hagemann, S.G, Robert, F (1998) Orogenic gold deposits: A proposed classification in the context of their crustal distribution and relationship to other gold deposit types. Ore Geology Reviews, 13 (1) 7-27 doi:10.1016/s0169-1368(97)00012-7 | Journal (article/letter/editorial) | | Ore Geology Reviews 13 Ĺ˝1998. 7â27 Orogenic gold deposits: A proposed classification in the context...their crustal distribution and relationship to other gold deposit types D.I. Groves a a,) , R.J. Goldfarb...DenĂer Federal Center, DenĂer, CO 80225, USA c Wiluna Gold Mines Limited, 10 Ord St., West Perth, WA...March 1997 Abstract The so-called âmesothermalâ gold deposits are associated with regionally metamorphosed...long-distance hydrothermal fluid migration. The resulting gold-bearing quartz veins are emplaced over a unique |  | | Report (issue) | | Foothills Melange and Adjacent Areas, Amador County, California GEOLOGICAL SURVEY PROFESSIONAL PAPER 827 IUREAU...Foothills Melange and Adjacent Areas, Amador County, California By WENDELL A. DUFFIELD and ROBERT V. SHARP GEOLOGICAL... ---------------------------------------~elange belt---------------------------------------------General...the melange belt ______ Problems of regional correlation-----------------------Eastern belt ----------...------------------------Logtown Ridge-~other Lode belt-------------------------Logtown Ridge Formati |  | | Report (issue) | | C3 A3 NO. 193 C.2 GOLD DISTRICTS OF CALIFORNIA BULLETIN 193 California Division of Mines and...Geology Sacramento, California, 1970 GOLD By William B. DISTRICTS OF CALIFORNIA Clark Geologist...Geologist, California Division of Mines & Geology, Sacramento, California UNIVERSITY LIBRARY U.C DAVIS '~'^...though Nugget. This 201 -ounce (troy) cluster of gold on display in the Division of Mines and Geology...Geology San Francisco's Ferry Building. Melted down as gold, it would be worth tome seven or eight The Fricof |  | | Report (issue) | | Harvard Open Pit, Jamestown Mine, Tuolumne County, California, March, 1998âSeptember, 1999 by R.P. Ashley1...Geological Survey Menlo Park, California 2 Stanford University Stanford, California Table of Contents Introduction...Jamestown mining district in western Tuolumne County, California (Fig. 1). This district is one of many located...districts along the Melones fault comprise the Mother Lode gold belt (Clark, 1970). The Harvard pit is the largest...Harvard that produced about 100,000 troy ounces of gold, mainly between 1906 and 1916 (Julihn and Horton |  | Taylor, R. D., Goldfarb, R. J., Monecke, T., Fletcher, I. R., Cosca, M. A., Kelly, N. M. (2015) Application of U-Th-Pb Phosphate Geochronology to Young Orogenic Gold Deposits: New Age Constraints on the Formation of the Grass Valley Gold District, Sierra Nevada Foothills Province, California. Economic Geology, 110 (5) 1313-1337 doi:10.2113/econgeo.110.5.1313 | Journal (article/letter/editorial) | | Young Orogenic Gold Deposits: New Age Constraints on the Formation of the Grass Valley Gold District, Sierra...Sierra Nevada Foothills Province, California Ryan D. Taylor,1,2,â Richard J. Goldfarb,1,3,4 Thomas Monecke...Valley orogenic gold district in the Sierra Nevada foothills province, central California, the largest historic...historic gold producer of the North American Cordillera, comprises both steeply dipping E-W veins located...about 70% of the 13 million ounces of historic lode gold production in the district. The oceanic host rocks |  | | Journal (article/letter/editorial) | | the California Gold Rush: Environmental Geochemistry of Arsenic in the Southern Mother Lode Gold District...University , Stanford, California, 94305 b U.S. Geological Survey , Menlo Park , California, 94025 Published...the California Gold Rush: Environmental Geochemistry of Arsenic in the Southern Mother Lode Gold District...the California Gold Rush: Environmental Geochemistry of Arsenic in the Southern Mother Lode Gold District...Stanford, California 94305 AND ROGER P. ASHLEY U.S. Geological Survey, Menlo Park, California, 94025 Downloaded |  | | Journal (article/letter/editorial) | | Metamorphic Origin of Ore-Forming Fluids for Orogenic Gold-Bearing Quartz Vein Systems in the North American...large number of gold-bearing quartz vein systems from the Mother Lode of southern California, through counterparts...δ15N values of 1 to 6 per mil. The δ18O values of gold-bearing vein quartz from different locations in...hydrothermal minerals indicate that the formation of these gold-bearing veins involved dilute, aqueous carbonic...Introduction OROGENIC or mesothermal lode gold mineralization in the form of gold-bearing quartz vein systems |  | | Journal (article/letter/editorial) | | Placer County California Wayne C. Leicht 875 North Coast Highway Laguna Beach, California 92651-1415 (949)...more or less consistent source of ďŹne crystallized gold specimens, with the exception of recent years during...specimens of crystallized gold in the future. INTRODUCTION Specimens of crystallized gold from what is now known...Since that time, substantial numbers of beautiful gold specimens have reached the market. The present owner/operator...claims under one name is not unprecedented in California. The 16 to 1 mine in Sierra County, the Red Ledge |  | | Journal (article/letter/editorial) | | information: http://www.tandfonline.com/loi/tigr20 Gold Deposits in China: Main Types and Potential Kaihui...2010. To cite this article: Kaihui Yang (1996) Gold Deposits in China: Main Types and Potential, International...V. H. Winston & Son, Inc. All rights reserved. Gold Deposits in China: Main Types and Potential1 KAIHUI...at 16:31 29 March 2015 Abstract The considerable gold resource potential in China has been increasingly...Himalaya-Tethys, and Nanling orogenic belts. A large number of gold deposits and geochemical anomalies have been discovered |  | | Journal (article/letter/editorial) | | The M OC K I N G B I R D Gold Mine Downloaded by [University of New Mexico] at 10:16 27 November 2014...Mariposa County, California F or the avid mineral enthusiast, gold, especially crystallized gold, is one of...all collectible species. Of the thousands of known gold occurrences, few have produced aesthetic macroscopic...Californiaâs Mother Lode belt and its peripheral districts have produced many of the finest gold specimens...known, including incredible examples of crystallized gold from the Colorado Quartz, Red Ledge, Sixteen-to-One |  | | Report (issue) | | Archive in 2012 with funding from University of California, Davis Libraries http://www.archive.org/det...CALAVERAS COUNTY, CALIFORNIA By WILLIAM B. CLARK, Mining Geologist California Division of Mines ...Mining Geologist California Division of Mines and Geology County Report 2 CALIFORNIA DIVISION OF MINES...1962 UNIYERSITY OF CALIFOI DAVIS STATE OF CALIFORNIA Edmund G. Brown, Governor THE RESOURCES Hugo...Dolomite (see limestone) 93 : 32 32 Gold Lode gold - â Placer gold 76 93 Iron Lead 93 ----- Limestone |  | | Journal (article/letter/editorial) | | TectonicControlandFluid Evolutionin the QuartzHill, California,Lode Gold Deposits DON ELDER* AND SUSAN M. CASHMAN...Hill, in the KlamathMountainsof northernCalifornia,gold-bearingquartz-carbonate-pyrite-chlorite-sericite...edpathwaysfor ore fluidtransport. Introduction GOLD-BEARING veinsfoundat QuartzHill are representativeof...Sierra Nevada Mother Lode belt. math Mountainsproduced'"7.0 millionoz of Au from placerand lode sources(fromAlbers...depositsand In California, the Klamath Mountainsgeologic '-'120,000 oz of Au from lode mines. The tec |  | | Journal (article/letter/editorial) | | SeveralGold Mines in the Mother Lode, Tuolumne and Mariposa Counties, California R. H. WEIR, JR.,* ANDD...16802 Abstract Gold-bearingquartzveinsin the southernpart of the Mother Lode, California,formed from fluidswhich...fault zones. In the Coulterville district of the Mother Lode, these fluids altered ser- pentiniteto a ta...galena,tellurides(Pb, Ni, Ag, Au-Ag), and native gold precipitated last amongthe vein minerals. Observations...Alleghanydistrict,in the northernportionof the Mother Lode, reveals low-salinity (â˘2 equivwt %NaC1), C |  | | Journal (article/letter/editorial) | | known for a single discovery of large masses of gold and tellurobismuthite (âtetradymiteâ), virtually...important with respect to value, if nothing else. Gold specimens touted to be from localities that were...Attractive gold specimens became increasingly available from a wide variety of California localities...localities that produced good coarse gold. Entire collections focusing on gold were assembled by wealthy collectors...collectors in both the United States and Europe. Gold specimens became generally available for those willing |  | | Field Trip Notes | | ROADSIDE GEOLOGY AND MINING HISTORY OF THE MOTHER LODE 1994 Gregg Wilkerson and David Lawler BUREAU...UNIVERSITY or California ⌠⢠* * ** ROADSIDE GEOLOGY AND MINING HISTORY Âş OF THE MOTHER LODE April 9...Management Earth Science Field Trip Program Mother Lode '94 Bakersfield District Office Bureau of...ROADSIDE GEOLOGY AND MINING HISTORY OF THE MOTHER |*4 EART LODE Gregg Wilkerson and David Lawler INTRODUCTION...field guide follows, with minor modifications, California Division of Mines and Geology Bullet in 141 which |  | | Journal (article/letter/editorial) | | Componentsof Gold-BearingQuartz Veinsin the Northern Sierra Nevada Foothills Metamorphic Belt, California J. K...Departmentof Geologyand Geophysics, Universityof California,Berkeley,California94720and U.S. GeologicalSurvey... Mail Stop941,345 MiddlefieldRoad,MenloPark, California 94025 AND R. W. KISTLER U.S. GeologicalSurvey...Stop937, 345 MiddlefieldRoad,MenloPark, California 94025 Abstract Gold-bearingquartz veinsoccur in and near...in the Alleghany,GrassValley, Washington,and Mother Lode districtsyield concordant K-Ar andRb-Srages.The |
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Mockingbird Mine, Colorado area, Whitlock Mining District, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA