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| History and Humanities Calaveras Gold The Impact of Mining on a Mother Lode County . ...Limbaugh, Ronald H. Calaveras gold : the impact of mining on a mother lode county / Ronald H. Limbaugh...(hardcover : alk. paper) . Gold mines and mining—California—Calaveras County— History—th century. I. Fuller...Placer Era : The Beginnings of Lode Mining, – : Mining Society in the Early Years : Ancillary...Industries : Preparing for Modern Mining : Lode Mining in the Golden Years : The Unstable Twenties |
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| Archive in 2012 with funding from University of California, Davis Libraries http://www.archive.org/det...RESOURCES OF CALAVERAS COUNTY, CALIFORNIA By WILLIAM B. CLARK, Mining Geologist California Division of...LYDON, Mining Geologist California Division of Mines and Geology County Report 2 CALIFORNIA DIVISION...1962 UNIYERSITY OF CALIFOI DAVIS STATE OF CALIFORNIA Edmund G. Brown, Governor THE RESOURCES Hugo...MINES AND GEOLOGY Ian Campbell, State Geologist COUNTY REPORT Price $4.00 2 6 1 - CONTENTS ABSTRACT |
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| GEOLOGIST .JUNE, 1918 ON GOLD HILL AND VICINITY, COUNTY, WESTERN UTAH. No. 4 TOOELE J. F. KEMP AND PAUL...interest, and as all came from a portion of the county regardingwhich records were few, a short contributionwas...publishedregarding them? Clifton and Gold Hill are two early mining campsformerly scenesof activity, quiet in later...collectedby E. E. Olcott, E.M., near Gold Hill, Tooele County, Utah. Trans. N.Y. Acad. Sciences,II: 127-128,...old dayson the slopesof Gold Hill. Modest deep mining had been developedat the Cane Spring and Alvarado |
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| 1943 TUNGSTEN DEPOSITS OF THE DARWIN INYO COUNTY, CALIFORNIA. L. KENNETH WILSON. HILLS, • ABSTRACT...mill within the district. The latter will eliminate current tendency toward selective mining which resultsin.... 1 Chief Geologist, E. L. Cord Mining Interests, Darwin, California. 543 546 : ...... 549 544 ................ Future of TungstenMining in the District ....................... 557 559 589 INTRODUCTION...the Sierra Nevada ores in the Darwin Hills,8 a district creditedwith a productionof approximately $5,000 |
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| prospectors and to investorsin this uncertaintype o.f mining property. As the origin of molybdeniteores has...this article was collectedby the writer in Pontiac county,Quebec,and in certainparts of the provinceof Ontario...Huddersfield,Masham,Onslo,w,and Thorne in Pontiac county,Que- bec,but,as'thelocalities visitedin Ontarioshowed...schist,and paragneiss. The oldest rocks in this district are undoubtedlythe ancient sedimentsof the Grenville...pegmatite. By far the greater portion of this district is coveredwith rocks of the Laurentian Systemand |
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| ENGINEERING GEOLOGY-FOLSOM DAM PROJECT, CENTRAL CALIFORNIA • GEORGE A. KIERSCH AND RAY C. TREASHER ...Petrology of quartz diorite ....................................... Weathering of quartz diorite .......most of the saddle embankments are founded on quartz diorite (Upper Jurassic). Metamorphicrocks of the...consists of Recent mining debrisand Pliocene(?)-Pleistocene channelgravels. The quartz diorite is extensivelyfracturedby...shearor fracture zone. The erratic weatheringof quartz diorite constitutesa seriousfounda- tion and excavationproblem |
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| Applied Earth Sciences, StanfordUniversity,Stanford,California 94305 Abstract The epithermalgold-silverdepositat...overprintedby both early,pervasivepropyliticalteration(quartz-adularia-albite-chlorite-calcite-pyrite +_epidote)...andlater, more fracture-controlledpotassicalteration(quartz-adularia-white mica-calcite-pyrite).Temporaltr...and propylitizedtuff is markedby fracturecoatings(quartz-adularia-pyrite-gold ___ albite ___ calcite___...eson microbrecciaveins(quartz-pyrite___ gold ___ chalcedony). Silicic(quartz-adularia-pyrite) andint |
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| Yeins.' The ore at Tonopahoccursalmost entirely in quartz veins in the "earlier andesite,"2 a rock which...the sulphosaltof silver,polybasite,in a gangueof quartz and adularia feldspar. In subsidiaryamountspyrite...314. •J. E. Spurr, "Geology of the Tonopah Mining District, Nevada," U.S. Geol. Surv. Professional Paper..."Geology of the Producing Part of the Tonopah Mining District, I9o9," Economic GEOr.OG¾, Vol. IV., pp. 68I-7•2...the characteristicunoxidizedore is that of white quartz blotchedand bandedxvithblack sulphidesof silver |
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| MAGCOPPER SULPHIDE DEPOSIT IN PLUMAS COUNTY, TION CALIFORNIA, BY AND ITS MODIFICA- ASCENDING SECONDARY...described in this paperare situatedin Plumas County, California, on the west slopeof the east range of the...comains two geologicalmaps. In that portion of the district northeastof Indian Valley, with which we have...interstitial quartz in quartz- dioritesandgranodiorites. I.n thesegranularrocks' the quartz often fills...and hornblende•and is plainly later and yet the quartz is regardedas a constituentof the originalmagmaand |
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| The Tertiary gravels of the Sierra Nevada of California: U.S. Geol. Survey, Prof. Paper 73, 226 p. 7...MOUNT QUEENSLAND K. D. CORNELIUS The Mount Morgan mine is locatedabout450 milesnorth of Brisbanein east-central...10-inchlonghammerhead. (Photographed in February1967at mine coordinates260N, 160W; 565 feet below the original...with any pebbledikes that may have been present. Mining in the trunk of the ore pipesmay ultimatelyrevealthe...COMMUNICATIONS Typically,the pebbledikesare from oneto two feet thick,althoughthey havebeenobserved to |
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| thorough surprise to the Mining and Scientific Press. possessing the colors of Mining and Scientific Press...Press. ESTABLISHED 1S«50. Oldest Mining; Journal on the American Continent. e. No. 220 Market Street ,...in California and Colorado for '95; Our California Delegation in Congress; The Revival of Mining and...and Mining Machinery; "Jumping," 2. MECHANICAL PROGRESS.— A Drill Sharpening Machine; Silver from Silver...Magnetic Map of the Earth, 8. MINING From the Various Counties of California, Nevada and Other Pacific Coast |
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| possibilityof extensivepayabilityin the Jacobinareefs. Gold mining operations,however,have beenconductedon a very...sericite-chlorite in quartz pebbleconglomerates.Why not uranium? The only specimen of Canavieiras mine ore availableto...gneiss CANAVIEIRAS GEOLOGICAL CANAVlEIRAS MAP MINE AREA JACOBINA, BRAZIL SCAL Ir 0 I000 2000 ...correlation. GEOLOGY OF THE CANAVIEIRAS MINE The mine is situatedon the lower east flank of the steep-sided...(Chabu-type) (Piritoso-type) (Piritoso-type) The main mine workingsare in the Piritoso reef and extend into |
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| elements in veins and rocks. In the Goldfield district the ore is char- acteristicallydistributedin...spectrograph in the geologicallaboratories of the California Institute of Technology. A technique of silicateanalysis...ledgesof the district,the rockshave beenchanged to a porous, fine grained aggregateof quartz. In the second...alteredto a comparatively soft, light-colored mass of quartz, kaolinite, alunite, and pyrite. The boundary betweenthesetwo...resultedin the development in the wallrockof calcite,quartz, chlorite,epidote,and pyrite. The aluniticandpropylitictypesare |
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| GeologicFeatures of the West ShastaDistrict, California JOHN P. ALBERS U. S. GeologicalSurvey,345 MiddlefieldRoad...MiddlefieldRoad,Mail Stop901, MenloPark, California 94025 AND JOHN H. C. BAIN Bureauof Mineral Resources...Australia Abstract The West Shasta massive sulfide district is in the easternmost of a series of accreted...upperpart; and an upperunit typicallycontainingdark quartz phenocrystsin excessof 4 mm in diameter. Much of...km that constitutesthe limits of the former mining district. The youngestunit in the arc sequenceis the |
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| privatebranchrailroadconnects the chief mines of the district with the main line of the National Railwaysof...during the winter months. This district, like most other important mining districts in Mexico, was activelymined...closingdecadeof the nineteenthcentury. In I894 the various mining claimswere obtainedand consolidatedby GuggenheimBrothers...operations again ceased. About I927 Mr. Henry Wyman, a mining operator of considerable experiencein Mexican fields...million tons, and by profits thus gained give the mine somemuch neededexploration. He formed the Union |
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| pp. 941-950 BERYLLIUM-BEARING TUFF IN JUAB COUNTY, MORTIMER H. STAATZ AND THE THOMAS RANGE,............ 943 946 948 Potentialities of the district ........................................... References...Utah, are along the periphery of the fluorspar district at Spor Mountain. The beryllium is in altered...related fluorite, quartz, chalcedony,opal, calcite, and montmorillonite and with residual quartz, feldspar,...related to a second period of volcanic activity. The district promisesto be an important source of beryllium |
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| Vol. V., •9o5. 2C. R. Van Hise, Jour. o[ Canadian Mining Inst., Vol. X., •9o7. 599 6oo REGINALD E. ...bytownite), while ilmenite is generallypresentand quartz is common. At the edgeof the sheetsthe rock is...pink in color,showa considerable percentage of quartz and orthoclase,often in micrographicintergrowth...remarkablysimilar to diabasesills of the Lake Superior district, which are regardedas of Keweenawan (beingthe...plutonicequivalent of the surfaceflowsof the Copper district) or of Post-Keweenawanage.2 VEINS IN DIABASE-GABBRO |
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| OPHIR No. 7 MINING DISTRICT. SEYMOUR G. OLMSTEAD. INTRODUCTION. The Ophir Mining District is one of...discoveryand developmentof future minesin the older mining regionsmust depend,to a great extent, on the i...geologist'sideas to practicalmining. The Ophir District lies 6n the westernside of the Oquirrh Range,...Ophir, Mercur and Tintic mining districts,is undoubtedlythe greatest mining region in the State. As such...of Utah," Ophir District, by J. R. Murphy, Salt Lake City, 1872. "Mercur Mining District," by Spurt and |
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| couldresult in hypogene(?) deep-levelsulphates. The quartz-sericite type of alterationwith associated adulariaindicating...quartzandpotash,asis well known,commonlyformsa oneto ten footsheathin the wall on bothsidesof the vein...marked at YellowstonePark by the development of a quartz-orthoclase alteration. The effluentliquidfrom this...nearlyconstantfrom depositto deposit,oftenstartingwith quartz,pyrite and arsenopyriteand oxides,followedby the... 802) think that gainsof silicain "mesothermal"quartz veins and in garnet zonescan be accountedfor by |
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| AMERICAN GEOLOGIST DECEMBER, GNEISSI'C GALENA DISTRICT, ORE BRITISH No. 8 x9x7 FROM THE SLOCAN...examinedsomeof the silver-leaddepositsof the Slocanmining district and ½btained someinterestingdata concerning. the...thisrelation is the purposeof this paper. The district is located in southeastern British Columbia within...Arrow lakes on the west. The chief mining centersof the district are Nelson, Kaslo, Sandon, Silverton... chalcopyrite, and pyrite. The gangueis mostly quartz associatedwith small amounts of calcite and siderite |
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| tsand Their Host Rocks,West ShastaCopper-Zinc District ROBERTJ. HORTON, BRUCED. SMITH, U.S. GeologicalSurvey...The West Shastacopper-zincdistrict,ShastaCounty,California,containsmanyvolcanogenic sulfidedepositswithin...the massivesulfidesand sulfidepotentialwithinthe district(AlbersandBain, their hostrocks,(2) to determinethe...MASSIVE GEOLOGIC IRON MAP MOUNTAIN SULFIDE MINE OF STUDY AREA HORNETsuR•EF 5 0 0 FT • QUADRANGLE...electricaltechniquesappliedto mineralexploration within the district. Mostelectricaltechniquesmeasureresistivity(the |
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| STATE OF CALIFORNIA DEPARTMENT OF NATURAL RESOURCES GEORGE D. NORDENHOLT, Director DIVISION OF MINES...BRADLEY State Mineralogist JANUARY, 1934 No. CALIFORNIA JOURNAL OF MINES AND GEOLOGY QUARTERLY CHAPTER...OF MINES FERRY BUILDING, SAN FRANCISCO, CALIFORNIA CALIFORNIA STATE PRINTING OFFICE HARRY HAMMOND. STATE...SACRAMENTO. 1934 10323 LIBRARY UNIVERSITY OF« CALIFORNIA DAVIS 1 DIVISION OF MINES EXECUTIVE AND TECHNICAL...Olaf P. C. A. Logan, District Mining Engineer C. McK. Laizure, District W. Burling Tucker, Reid |
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| depositsoccursin well definedbeds, varyingin numberfrom oneto three,and havingan averagethicknessof one meter...arranged. Arrayfin mine. X 50. Psilomelane showing banded colloform texture. Arrayfin mine. x 50. Fro. 4...disseminatedin the gangue, and in places,at Porvenir mine (according to Ramdohr), showing an octahedrichabit...This type of occurrenceis characteristicin Arrayan mine. In Porvenir and Array/m minespyrolusiteshowsa ...pyrolusiteand psilomelane.Accordingto Ramdohr, in Porvenir mine, pyrolusitein part replacescalcite. Manganiteis |
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| AT THE OF THE ZINC-LEAD-COPPER MINDAMAR K. MINE, NOVA DEPOSITS SCOTIA D. WATSON CONTENTS PAGE.......... 411 ABSTRACT The Mindamar mine is in Richmond County on Cape Breton Island, Nova Scotia. The...in gangue composedmainly of dolomite, magnesite,quartz, sericite, talc, and chlorite. They were formed...most of the dolomiteand magnesiteand someof the quartz, partly in fracturesand partly by replacement....WATSON INTRODUCTION THE ore bodiesat the Mindamar mine are irregular lensesthat lie within a persistent |
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| faulting may have been devious. The result discoveredin mine or ledge or quarry still requires description, and...of the miners rules and customs;that all metal mining (except iron) in the westernstatesis carried on...whether,if a mining law were now proposedwhich was to go into effect in an early stageof mining development...that previousto •866 the greater part of the metal mining of the world,asidefrom placerandiron deposits,...upontypical veins. This was especiallytrue of the mining regionsaround Freiberg, in Germanyand of Cornwall |
