 | | Report (issue) | | PARAGENESIS OF THE BALD MOUNTAIN MASSIVE SULFIDE DEPOSIT, AROOSTOOK COUNTY, MAINE By John F. Slack...Stratigraphic Code December, 1997 2 INTRODUCTION The Bald Mountain Cu-Zn-Au-Ag deposit is a large volcanogenic...(VMS) body located in Aroostook County, northern Maine (Fig. 1). Bald Mountain is one of several VMS...obtained on primary mineralizing processes. The Bald Mountain deposit is very unusual among ancient VMS deposits...fabric and being only weakly metamorphosed. Bald Mountain probably is the most pristine large VMS deposit |  | | Book (volume) | | Mineralogy by Vandall T. King and Eugene E. Foord Maine Geological Survey DEPARTMENT OF CONSERVATION Walter...Resources Information, Maine Geological Survey Walter A. Anderson, State Geologist Maine Geological Survey...DEPARTMENT OF CONSERVATION 1994 Copyright ©1994 by the Maine Geological Survey, Department of Conservation. All...photograph: Fluorapatite, Pulsifer quarry, Auburn, Maine (2.2 cm specimen), Harvard Mineralogical Museum...Wendell E. Wilson, ©1985. The laws and policies of Maine and the United States prohibit discrimination in |  | | Report (issue) | | Polymetallic Veins and Replacement Deposits Part I Bald Mountain Gold Mining Region, Northern Black Hills, South...1857-C) Includes bibliographies. Contents: pt. 1. Bald Mountain gold mining region, northern Black Hills, South...[553.4' 1 '0978] 89-600050 CIP CONTENTS Bald Mountain gold mining region, northern Black Hills, South...Replacement deposits C21 Fissure veins C23 Mayflower mine C23 Mineral zoning C25 Isotope and fluid-inclusion...showing altered rock distribution in the Mayflower mine area, Utah C20 C5. Map showing principal ore bodies |  | | Journal (article/letter/editorial) | | view showing the Indian Queen mine ca. 1905 at Farlin, Beaverhead County. 208 ROCKS & MINERALS Downloaded...mines at Butte in Silver Bow County and the Black Pine mine in Granite County have produced many fine crystal...Beaverhead County, the pegmatites of Jefferson County, and the Snowbird mine in Mineral County continue...Highlands Centennial Nugget in 1989 in Silver Bow County. The seventh largest gold nugget found in Montana;...should be sent to the author. LOCATIONS BY COUNTY Beaverhead County Anderson deposit, sec. 16, T. 12 S., R |  | | Journal (article/letter/editorial) | | ORES OF GILPIN E•soN COUNTY, COLORADO. S. BASTIN. INTRODUCTION. An exhaustive report on the economic...economic geology of Gilpin County and adjacentportionsof Clear Creek and Bouldercounties, Colorado,'byEdsonS...principalminingcentersare the following: Gilpin County ................................... ['Central...GILPIN COUNTY, COLORADO. 263 [Idaho Springs. /Gilson. -[Alice. [Dumont. Clear Creek County .........underlessdeep-seated conditions, ORES OF GILPIN COUNTY, COLORADO. 265 faulting took place. Someof the |  | | 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...Goodsprings (Yellow Pine) Mining District, Clark County John C. Kepper MINERAL CATALOG 91 121 Gregory...Hen1in1orphite Azurile Barite, N1eikJe Mine Barite, '\forthun1berland Mine Bante, Rosebud t1ine Barile v;ith...inclusions Bolt½'OOdite Calcite, Meikle Mine Calcite, Getchell Mine Callaghanite Cassiterite and Hema tile |  | | Report (issue) | | PRELIMINARY REPORT ON THE ECONOMIC GEOLOGY OF GILPIN COUNTY, COLORADO. By EDSON S. BASTIN and JAMES M. HiLL...brief account of the economic geology of Gilpin County and adjacent portions of Clear Creek and Boulder...area includes the productive portions of Gilpin County and small adjacent parts of Boulder and Clear Creek...humidity. The principal mining centers are, in Gilpin County, Central City, Blackhawk, Nevadaville, Eussell...Clear Creek County, Idaho Springs, Gilson, Alice, Dumont, and Lawson; in Boulder County, Caribou and |  | Ayuso, R. A., Wooden, J. L., Foley, N. K., Seal, R. R., Sinha, A. K. (2005) U-Pb Zircon Ages and Pb Isotope Geochemistry of Gold Deposits in the Carolina Slate Belt of South Carolina. Economic Geology, 100 (2) 225-252 doi:10.2113/gsecongeo.100.2.225 | Journal (article/letter/editorial) | | obtained from rocks closely associated with pyrite-enargite-gold deposits at Brewer (quartz-topaz rhyolite...compositions of sulfide minerals (galena, pyrite, enargite, sphalerite, chalcopyrite, and molybdenite) and...Early Paleozoic 225 226 AYUSO ET AL. Eastern USA Virginia Carolina Slate Belt Study area Brewer...Granite BDH-129 zircon BR2B qpe Quartz-pyrite-enargite breccia Quartz sulfide breccia Gossan and massive...slate belt (Fig. 2). Gold-pyrite-chalcopyrite-enargite ores in breccias are associated with subvolcanic |  | | Report (volume) | | Louisiana........Prof. Gilbert D. Harris, Baton Rouge. Maine............Mr. C. Vey Holman, Bangor. Maryland....See Bauxite and Hallpysite. Asbestos. Tallapoosa County, with corundum deposits near Dudleyville; not found...commercial quantity or quality. Asphalt. Colbert County, small quantity has been shipped from near Leighton;...following localities: Bibb County, Pratts Ferry; Calhoun County, near Tampa; Clay County, T. 20, Pv. 7 E.; Jefferson...Jefferson County, at Elyton; Lee County, at Chewacla lime works; St. Clair County, at Gfeensport; Shelby |  | | Report (volume) | | .............................................. Maine...................................................See Bauxite and Halloysite. Asbestos. Tallapoosa County, with corundum deposits near Dudleyville; not found...commercial quantity or quality. Asphalt. Colbert County, small quantity has been shipped from near Leighton;...following localities : Bibb County, Pratts Ferry; Calhoun County, near Tampa; Clay County, T. 20 S., R. 7 E.;...; Jefferson County, at Ely ton; Lee County, at Chewacla lime works"; St. Clair County, at Greensport; |  | | Catalog/List | | 1-1/4xl-3/4" $ 20.00 3. ANHYDRITE Eagle Picher mine, Niaca, Chihuahua, Mexico Superb pale blue-white...excellent form. 2x3xl-1/2" $ 15.00 4. ACANTHITE Rayas mine, Guanajuato, Mexico Superb lustrous dark black globular...dolomite. 2x3x3/4" $ 50.00 15. CALCITE Mandawaska mine, Bancroft, Ontario, Canada Select dark tan 4 mm...sulfides. 2xl-3/4" $ 35.00 25. CHALCOCITEMusonoi mine, Shaba, Zaire Choice lustrous terminated gray metallic...crystals $ 25.00 on jet-black 27. CONNELLITE Czar mine, Bisbee, Cochise Co., Arizona Select rich dark blue | | | Report (issue) | | 31 University of Nevada Press, Reno, Nevada 89557 USA Copyright © 2004 by University of Nevada Press Photographs...Olivenite, 1.6-cm cluster, Majuba Hill Mine, Antelope district, Pershing County. N. Prenn collection. Photograph...Goodsprings (Yellow Pine) Mining District, Clark County John C. Kepper 91 References 467 Contributors...Mexican Mine Gold, Majuba Placer Pyromorphite after Galena with Conichalcite Gold, Round Mountain Mine...Almandine-Spessartine Annabergite Gypsum Quartz, Petersen Mountain Heterogenite Quartz (amethyst), faceted Arsenolite |  | | Report (issue) | | . . . . . . . . . . . . . . . . . . . . . . 1 County Listings. . . . . . . . . . . . . . . . . . . .... . . . . . . . 4 Mineral Localities Listed by County . . . . . . . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . . . . 7 Beaver County . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . . 7 Box Elder County . . . . . . . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . . . . 10 Cache County . . . . . . . . . . . . . . . . . . . . . . . |  | | Report (volume) | | ........................................ Clark County.............................................................. Lincoln mine........................................ Bennett mine.........................prospects...................................... Elko County.................................................. CONTENTS. 5 Deposits and mines Continued. Elko County Continued. Mud Springs district Continued. Page...................................... 67 Spruce Mountain district..................................... |  | | Report (issue) | | 16. 17. 18. Historic open pit of the Haile Gold Mine, South Carolina .......................................... 20 iii Tables 1. 2. The Haile Gold Mine reserve and resource estimates ................... Haile Gold Mine, South Carolina Figure 1. Historic open pit of the Haile Gold Mine, South Carolina...the open pit of the Haile deposit of Lancaster County, South Carolina, which produced approximately 50...resources in the region. Table 1. The Haile Gold Mine reserve and resource estimates. [Accessed March |  | | Journal (article/letter/editorial) | | GEOLOGY AND ECONOMIC VALUE OF THE PITCHBLENDE COUNTY, DEPOSITS OF GILPIN COLORA•DO. PERCY R. ALSDORF...pitchblendefor the entire world occursin Gilpin County,Colo., this paperis especiallydevotedto the studyof...22, 1906. 266 PITCHBLENDE DEPOSITS OF GILPIN COUNTY, COLO. 267 rial; thusknowingthe rate of discharge...gram). Geology.--In "PitchblendeDepositsof Gilpin County,"•' Mr. E. S. Bas.tin states: "The predominant...rocksof QuartzHill andneighboring parts of Gilpin County are pre-Cambrianigneousand sedimentary rocksand |  | | Journal (issue) | | the Poor Farm in the southeast section of Lincoln County, North Carolina, and is suggestive of the place...nation of quartz and tourmaline, also from Lincoln County, North Carolina. The tourmalines are nearly uniform...important " find " was that made by Mr. Harn in Lincoln County, of a single deposit of emerald green muscovite...Nittany Moun tains, near the town of Leinont, Centre County, Penn. The crystals occur singly or in parallel...from a placer a mile or two below the town. At a mine about three miles southeast fair specimens of red |  | | Report (volume) | | the Lawson-DumontFall River District Clear Creek County Colorado By C. C. HAWLEY and FRANK BAKER MOORE...of the Lawson-Dumont-Fall River district, Clear County, Colo. 2. ~ap showing major faults (veins) of the...analysis of biotite-quartz-plagioclase gneiss, Almaden mine _____ -------------- ________ ----------_ 4. Modes...THE LAWSONDUMONT-FALL RIVER DISTRICT, CLEAR CREEK COUNTY, COLORADO By C. C. HAWLEY and FRANK BAKER MooRE...the Front Range mineral belt, is in Clear Creek County, Colo., just west of the highly productive Central |  | Tornos, Fernando, Velasco, Francisco, Slack, John F., Delgado, Antonio, Gomez-Miguelez, Nieves, Escobar, Juan Manuel, Gomez, Carmelo (2017) The high-grade Las Cruces copper deposit, Spain: a product of secondary enrichment in an evolving basin. Mineralium Deposita, 52 (1) 1-34 doi:10.1007/s00126-016-0650-3 | Journal (article/letter/editorial) | | Survey, National Center, MS 954, Reston, VA 20192, USA 4 Laboratorio de BiogeoquÃmica de Isótopos Estables...only the secondary ore, the mine has a projected life until 2022. The mine will produce ca. 1 Mt of copper...Scheiber et al. (2015). HCH and HCL refer, following mine terminology, to cementation zones developed on the...approximate depth of 1500 m was attained. At the mine site, the basement is located at a depth of ca....calcarenite and sandstone-microconglomerate. At the mine site and unconformably above the basement, it contains |  | | Report (issue) | | a short article on California diamonds. Amador County: A few small stones have been picked up near the...the towns of Volcano, Oleta and Fiddletown. Butte County: In 1853 it was observed that diamonds occurred..."Wliite Rock canyon and at Smith's Flat. Fresno County Small diamonds are reported to have been found...found a few miles north of Coalinga. Nevada County A 1-^ carat stone was found at French Corral. Siskiyou...El Dorado County Forest Hill. About : sixty have been : : : Bar. Trinit}^ County : INIicroscopic |  | | Book | | commercial ores and secondary minerals by state, county, township, and geologic range. For easy identification...61 232 PART The Making 43 II 5 7 3 III Mine PART 267 IV Glossary 279 Bibliography 291...cities, and many of today’s prosperous western county seats began as mining-boom camps. trating sand...Whether you such as those listed alphabetically by county, township, and range in Part II of this book. Where...minerals which make lovely cabinet specimens. old mine western states, to kick up and oxidation, |  | | Report (volume) | | ........................................ 13 Enargite ......'....................-.........-..........Bulletin 61. COVELLITE. From the East Greyrock mine, Butte, Mont. Collected by G. W. Tower. Analysis...[BULL. 220. POLYDYMITE. A massive ore from the mine of the Canadian Copper Company, Sudbury, district...Another nickel-iron sulphide, from the Worthington mine, SauTt branch of the Canadian Pacific Railway, 25...STROMEYERITE. From the Silver King mine, Calico, San Bernardino County, Cal. Specific gravity, 6:28. Analysis |  | | Book (edition) | | by Prof. John G. Smock, and that for the Eocky Mountain region by Mr. C. Whitman Cross. To these gentlemen...mmed at Broken Arrow aud Trout creek, in Sc. Clair county. The strata in this field are more faulted und...prong of Canoe creek, in St. Clair county, to Ha\sop creek, in Bibb county, a distance of 60 miles. Down to...to Helena, in Shelby county, the field has an average width of 5 or 6 miles. Below that point the width...miles being in the latitud" of Blocton, in Bibb county. The south ern end of this field has a greater |  | | Report (issue) | | ever since. Besides the La Grange mine, the largest hydraulic mine now in active operation, it contains...mines, particularly in the northern portion of the county. Large bodies of gravel of lower grade yet remain... Murphy, of the Union Hill mine; Mr. Pierre Bouery, of the La Grange mine; Mr. W. D. Ayers, of Poker...Globe mine; but more particularly to Mr. H. L. Lowden, formerly county surveyor of Trinity County, who...prominent, remarkably even crested ridge of South Fork Mountain, having an altitude of nearly 6,000 feet. The |  | Jin, Xiao-ye, Li, Jian-wei, Hofstra, Albert H., Sui, Ji-xiang (2017) Magmatic-hydrothermal origin of the early Triassic Laodou lode gold deposit in the Xiahe-Hezuo district, West Qinling orogen, China: implications for gold metallogeny. Mineralium Deposita, 52 (6) 883-902 doi:10.1007/s00126-016-0710-8 | Journal (article/letter/editorial) | | galena, sphalerite, chalcopyrite, tetrahedrite, and enargite. Gold occurs mainly as invisible gold in pyrite...Geological Survey, MS-963, Box 25046, Denver, CO 80225, USA 1.5 Ma (2σ) on two ore-related hydrothermal sericite...that several granitic dikes in the Zaozigou gold mine (Fig. 2) are contemporaneous with plutons of the...common. Minor galena, sphalerite, chalcopyrite, and enargite are present in different The Laodou quartz diorite...galena, sphalerite, and chalcopyrite (Fig. 7f). Enargite occurs mainly in microfractures in arsenopyrite |
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