 | | Report (issue) | | the cover—Turquois crystals from Lynch Station, Virginia; x ca.; pho tograph by Neal Ycdlin; color plates...C. A. Michael. COLD NUGGET FROM SPOTSYLVANIA COUNTY: Longest dimension approximately 13 cm., photograph...of Virginia R. V. DIETRICH* Professor of Geology and Associate Dean of Arts & Sciences, Virginia Polytechnic...Polytechnic Institute Research Division Bulletin 47 Virginia Polytechnic Institute, Blacksburg, Va. 24061 *... © R. V. Dietrich and the Research Division of Virginia Polytechnic Institute, 1970 Printed and bound |  | | Book (volume) | | Marcasite, Pyrite, Selenite and Sphalerite. A few alluvial Diamonds have been found. ASHTABULA COUNTY CONNEAUT...CLERMONT COUNTY MILFORD, area creek gravels and alluvial deposits, rare⎯Diamond. CLINTON COUNTY WILMINGTON...deposit⎯Hematite. COSHOCTON COUNTY AREA, townships of Washington, Virginia, Bedford, Jackson, Jefferson...CUYAHOGA COUNTY CHAGRIN FALLS (on Geauga Co. line), area quarries⎯oilstone. DELAWARE COUNTY DELAWARE... as clusters and nodules⎯Pyrite (crystals sharply cubic). FRANKLIN COUNTY COLUMBUS, area countywide |  | | Book (volume) | | Marcasite, Pyrite, Selenite and Sphalerite. A few alluvial Diamonds have been found. ASHTABULA COUNTY CONNEAUT...CLERMONT COUNTY MILFORD, area creek gravels and alluvial deposits, rare⎯Diamond. CLINTON COUNTY WILMINGTON...deposit⎯Hematite. COSHOCTON COUNTY AREA, townships of Washington, Virginia, Bedford, Jackson, Jefferson...CUYAHOGA COUNTY CHAGRIN FALLS (on Geauga Co. line), area quarries⎯oilstone. DELAWARE COUNTY DELAWARE... as clusters and nodules⎯Pyrite (crystals sharply cubic). FRANKLIN COUNTY COLUMBUS, area countywide |  | | Book (volume) | | instance, a single Spodumene crystal from the Etta Mine near Keystone on the east side of the Mount Rushmore...The commercial production of minerals, principally Gold, Silver, Copper, Iron, Lead, Manganese and Zinc...beds, excavations, etc.Selenite roses. BRULE COUNTY AREA: in the Oacoma zone of the Pierre Fm. On Elm...gray Barite rosette up to 5 or 6 inches. CAMPBELL COUNTY MOUND CITY, W to the Missouri R., regional hillsides...gravels, etc.petrified wood, wood opal. CORSON COUNTY LITTLE EAGLE: area ridges, slopes, stream beds |  | | Report (issue) | | ORE DEPOSITS OF THE SIERRITA MOUNTAINS, PIMA COUNTY, ARIZONA. By F. L. RANSOME. INTRODUCTION. The Sierrita...Sierrita Mountains, mainly in a rather definite belt of foothills, is a group of prospects within what...about 6 miles, the gentle slope to the foothill belt in which the pros-, pects of the Papago district...slope toward the Altar Valley is interrupted by a belt of ridges and isolated hills composed of the schistose...mines and prospects of the Papago district. This belt is roughly estimated to be from 1 to 2 miles wide |  | | Journal (article/letter/editorial) | | of Science; Wellington, 1905.] -BALL, LIONEL, C. Gold, Platinum, Tinstone, and Monazite in the Beach Sands...1905.] --Preliminary Report on Recent Discovery of Gold at Oaks View, near Rockhampton. [Geological Survey...HINCKLEY. Notice of a New Fossil Mammal from Sioux County, Nebraska. [Nebraska Geological Survey, Vol. II...66 pp. with index.] -MoFFIT, F. H. The Fairhaven Gold Placers, Seward Peninsula, Alaska. [U. S. Geological...Report, Michigan Academy of Science, pp. 38, 39.] -MOSELEY, -MOSSMAN, ROBT. C. Meteorology. August,1905 |  | | Report (issue) | | VIRGINIA DIVISION OI MINERAT RESOURCES PUBTICATION 45 VIRGINIA GOID-RESOURCE DATA Polmer C. Sweet...Sweet ond Dqvid Trimble CO'N'NONWEALTH OF VIRGINIA DEPARTAAENT OF CONSERVATION AND ECONO'vlIC DIVISION... VIRGINA 1943 VIRGINIA DIVISION OF MINERAT RESOURCES PUBTICATION 45 VIRGINIA GOLD-RESOURCE DATA Polmer...at the old Melville mine near l,Jilderness, 0range County. (photograph from "Gold Seekers Turn Again to...volume 39,.|934). VIRGINIA DIVISION OF RESOURCES PUBLICAIION 'YIINERAI VIRGINIA GOID.RESOURCE DATA |  | | Journal (volume) | | sand and granitic gravel are slightly mixed with gold in the beds of the Ramgunga, the Aluknunda, and...vein-stones. The ignorance and prejudice of the native mine-owner prohibits use of the wheel-barrow, the windlass...wrought to advantage, now remains unbroken in the mine, and undressed at the surface. All necessaries of...sometimes interlaid by quartz-rocks mixed with mica and talc. The micaceous and talcose slates are succeeded...mixed with the ores of manganese, as well as with talc and mica (Jacotinga). In some cases , however, the |  | Hall, R.B., Feininger, Tomas, Barrero, L., Dario, Rico H., Alvarez, A., , (1970) Mineral resources of parts of the Departments of Antioquia and Caldas, Zone II, Colombia. Open-File Report Vol. 1970 (70-148) US Geological Survey doi:10.3133/ofr70148 | Report (issue) | | RESOURCES................ .................. 17 Gold and silver................................. 17...silver to gold................. 22 Lode mines................................. , 23 Frontino Gold Mines............. 27 La Bramadora mine..................... 34 Berlin mine*.......................... 36... METALLIC" RESOURCES (CON'T.5 Gold and silver (con't.) Lode mines (cont.) El Limon mine.............. 40 Sma11....... 45 Pato Consolidated Gold Dredging Ltd.... 46 La Viborita mine........... 53 Sup^a placer |  | | Book | | siderite, Force Crag Mine, Braithwaite (MNS 4491) Back cover-'Daisy' gypsum, Birks Head Mine, Long Marton (MNS...Gill Mine, Caldbeck Fells (MNS 4492) (top right) Quartz, variety rock crystal, Carrock Fell Mine, Mosedale...(bottom left) Hematite, variety kidney ore, Nab Gill Mine, Boot (MNS 4490) (bottom right) ISBN O 85272 099...rocks unconformably and form an almost continuous belt surrounding the central fells. A small area of Devonian...present century when the area's last major lead mine, Greenside, closed in 1962. The celebrated graphite |  | | Report (issue) | | and C.M. Sears U.S. Geological Survey Reston, Virginia 22092 Open-File Report 92-448 This report is...Site Number, Site Name ...................... 6 County, State, Quadrangle, Latitude, Longitude .........Occurrences located in the Culpeper basin, Maryland and Virginia ..................... 168 H. Section H: Occurrences...Occurrences located in other areas of Virginia. ... 185 I. Section I: Occurrences located in North Carolina...information on all known Mesozoic occurrences of copper, gold, iron, lead, silver, zinc, barite,and fluorite. |  | | Book | | volume is dedicated is four-fold: (1) To locate by mine, deposit, or community those mineralized areas of...Co. Hematite CALERA, Shelby Co. Wavkllite CLAY COUNTY, Sec. 24. T. 19 S R., 7 E. STATUARY, Coosa Co...Co., (W. border of* Marble Crystalline TALLADEGA COUNTY Marble, (crystalline) VALLEY HEAD, DeKalb Co. Hematite...VILLAGE SPRINGS, Blount Co. Hematite WOODS COPPER MINE, Cloaburne Co. Sphalerite ARIZONA COVEI.I.ITE...Feldspar HISSOP, Coosa Co., (near) Beryl JACKSON COUNTY Hematite KENNEDYS, Clay Co., (near) Magnetite MILLERVILLE |  | | Book | | Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming Appendixes 615...Check of Common Minerals Common Fluorescent Minerals Gold Panning Values Colors and Symbols on a Geologic...the ancient gems), calcite, fluorspar, jadeite, pyrite, quartz family minerals ( agate, carnelian, chalcedony... opal, etc.), serpentine, and steatite (massive talc), as well as basalt, granite, limestone (and/ or...bodies. At a time when Neolithic man was picking up gold and copper nuggets to be hammered into ornaments |  | | Journal (article/letter/editorial) | | lamellae of talc and/or enstatite, both showing a consistent orientation relationship with olivine. Talc lamellae...consist of clino- and orthoenstatite intergrowths. Talc formation may be explained by exsolution, together...Kohlstedt and Vander Sande 1975; Putnis 1979; Moseley 1984; Otten 1985; Banfield et al. 1990). Several...00 Gooley et al. 1974; Arai 1978; Putnis 1979; Moseley 1984). Submicroscopic spinel-pyroxene intergrowths...lacking or has not been observed (Ashworth 1979; Moseley 1981; Drury and Van Roermund 1988; Dobrzhinetskaya |  | | Book (edition) | | WITH OR WITHOUT ACIDIC THE SILICATES EXCLUDED. Gold 122 and Compounds Platinum, Iridium, Ruthenium... Allophane Zeolite Section Heulandite 8. 325 Talc, Pyrophyllite, Sepiolite Glauconite 329 Serpentine...represent a few of the forms in a common species, pyrite, a compound of iron and sulphur. 8. Many more...dependent relations a fact often ex- figures pyrite. The various it is true, mutually CRYSTALLOGRAPHY...hemihedrism a kind that is presented by many crystals of pyrite. Fig. 48 is the hemihedral form resulting when |  | | Report (issue) | | Translated by William E. Brooks Geologist Reston, Virginia 20191 USA Special Paper 467 3300 Penrose Place, P...P.O. Box 9140 Boulder, Colorado 80301-9140, USA 2010 Copyright © 2010, The Geological Society of America...Place, P.O. Box 9140, Boulder, Colorado 80301-9140, USA. GSA provides this and other forums for the presentation...Place, P.O. Box 9140, Boulder, Colorado 80301-9140, USA www.geosociety.org Printed in U.S.A. GSA Books Science...2010003689 Cover: Wari mirror made of a mosaic of pyrite, turquoise, and shell, from the central or southern |  | | Journal (article/letter/editorial) | | north of Delhi, India (Dusseault, 1980); Mariposa County, California (Blake, 1877); and several localities...(Hampden County) and Warwick (Franklin County), Massachusetts; near Stafford (Stafford County), Connecticut;...Connecticut; in southern Virginia; in Stokes and Burke counties, North Carolina; at Pickens, South Carolina;...Chlorites Kaolinite Micas Pyrophyllite Serpentines Talc Vermiculite Nitrate Gerhardtite Source: Dana (1892)...imperfections. [To complete the picture: Minerals like pyrite, whose structures have similiar bonds in all directions |  | | Journal (article/letter/editorial) | | Vieira Brazil's premier gold province. Part II: geology and genesis of gold deposits in the Archean Rio...Rio das Velhas greenstone belt, QuadrilaÂtero FerrõÂfero Received: 25 April 2000 / Accepted: 12 March...Orogenic, gold deposits are hosted by rocks of the Archean Rio das Velhas greenstone belt in the QuadrilaÂtero...state, Brazil, one of the major gold provinces in the world. The gold deposits occur at the base of the...formation (BIF); (2) disseminated sul®de minerals and gold in hydrothermally altered rocks along shear zones; |  | Hwang, S.-L., Yui, T.-F., Chu, H.-T., Shen, P., Iizuka, Y., Yang, H.-Y., Yang, J., Xu, Z. (2008) Hematite and magnetite precipitates in olivine from the Sulu peridotite: A result of dehydrogenation-oxidation reaction of mantle olivine?. American Mineralogist, 93 (7) 1051-1060 doi:10.2138/am.2008.2784 | Journal (article/letter/editorial) | | studies have also shown that oriented mica + quartz + talc in phengite from the Dora-Maira whiteschist (Ferraris...greenschist; UHP Metamorphic belt = ultrahigh-pressure metamorphic belt. Optical microscopy under plane-polarized...meteorites (e.g., Ashworth 1979), plutonic rocks (e.g., Moseley 1981), and orogenic (including UHP) peridotites...process. Ferraris et al. (2000) noticed oriented talc, quartz, and celadonitic mica inclusions occurring...reaction: 3 alumino-celadonite = muscovite + 5 quartz + talc + H2O + K2O (6) and commented that it is not an |  | | Journal (article/letter/editorial) | | reported in terrestrial and chondritic olivines (Moseley 1981; Ashworth 1979; Drury and van Roermund 1988;...magnetite from several maficultramafic complexes (Moseley 1984); (3) intergrowths of orthopyroxene and magnetite...of Fe3+-bearing, high-T olivine during cooling (Moseley 1984); or (3) oxidation (Haggerty and Baker 1967;...a high-T, Fe3+-bearing olivine during cooling (Moseley 1984). These olivines have a wide compositional...clinohumite-bearing metadunite from the 3800 Ma Isua supracrustal belt, West Greenland: Chemistry, petrology, and origin |  | | Journal (issue) | | Ordovician pluton at Croft Quarry 166 Tim Colman Gold in Britain: past , present and future 173 Mercian...by Tim Cullen. Back cover: Minerals of Golconda Mine. See notes on page 205. Photos by John Jones. Stephen...Members’ Evening, 2010: Shetland: John Aram Golcona Mine: John Jones James Hutton: Gerard Slavin, Gerry Shaw...than bio-conservation? One may wonder if the old mine would have been closed off had it become a bat roost...now largely American; it is mostly active in the USA with twothirds of its 32,000 workforce American, |  | | Report (volume) | | quadrangle..____________--_-___-_-_-_-______-_--Gold Hill quadrangle.__.__--__--_-_-__--_-_-___-_--______...Miscellaneous rocks.______________________________________ Virginia._____________________________________________________...______-_____ Virginia.___--_-_______-______----___------_-____________^__ West Virginia.____________..._________________________________________________ Gold.-_--_______-_____-___--____-__-_-____-___-___--_-_...Maucherite__ ___________________________________________ Pyrite._____________________________________________ Pyrrhotite |  | | Report (volume) | | common economic mineral groups, such as Copper, Gold, Silver, and other geologic subjects. A few of the...Economic geology Beatty Township Garrison Township Gold, Konoeivmi Lake area Porcupine area Natural gas...11 Los Angeles County Mus. Quart.; Science Ser. [Paleontology Pub.] Los Angeles County Museum Quarterly;...Jour. Sci. YirgiOia Geological Survey Bulletin. Virginia Journal of Science. Blacksburg, Va. CharlottesvUle...Vicksburg, Miss. W. Va. Acad. Sci. Proc. West Virginia Academy of Sciences Proceedings. Morgantown, W |  | | Report (issue) | | Pleaoc teturn this publication to the Virginia Geologieal Survcy whcn you havc no further uce for it...COMMONWEALTH OF VIRGINIA STATE COMMISSTON ON CONSERVATION AND DEVELOPMENT VIRGINIA GEOLOGICAL SURVEY...Deposits of Virginra BY ARTHUR A. PEGAU UNIVERSITY, VIRGINIA 1932 COMMONWEALTH, OF VTRGINIA STATE COMMISSION...COMMISSION ON CONSERVATION AND DEVELOPMENT VIRGINIA GEOLOGICAL SURVEY ARTHUR BEVAN, State Geologist Bulletin...33 Pegmatite Deposits of Virginia BY ARTHUR A. PEGAU UNIVERSITY, VIRGINIA 1932 RICHMOND: DrvrsroN |  | | Report (issue) | | mineral resources............................... 97 Gold and silver, lode mines................................ 100 La Bramadora mine.............................. 104 Berlin mine....................................... 105 Gold and silver, placers............................ 108 Supfa placer district............................. 123 Nueva Esperanza mine at Aranzazu...................... 123 Aguadas...prospects west of the Rio Cauca................ 136 Pyrite............................................... |
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