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| Gold-bearing Polymetallic Veins and Replacement Deposits Part II U.S. GEOLOGICAL SURVEY BULLETIN 1857-F...169,1961 Stout St. LOS ANGELES, California-Federal Eldg., Rm. 7638,300 N. Los Angeles St. MENLO PARK, California-Bldg...8105,125 South State St. SAN FRANCISCO, California-Customhouse, Rm. 504.555 Battery St. SPOKANE, Washington~U... ANCHORAGE, Alaska-Federal Bldg, Rm. E-146,701 C St. Maps For maps, address mail orders to U.S. Geological...Gold-bearing Polymetallic Veins and Replacement Deposits Part II Gold in the Tintic Mining District, Utah |
 | Cheval-Garabédian, Florent, Faure, Michel, Marcoux, Eric, Gouin, Jérome, Picault, Maxime (2020) The La Bellière gold and antimony district (French Armorican Massif): A two-stage evolution model controlled by Variscan strike-slip tectonic. Ore Geology Reviews, 125. 103681pp. doi:10.1016/j.oregeorev.2020.103681 | Journal (article/letter/editorial) |
| Journal Pre-proofs The La Bellière gold and antimony district (French Armorican Massif): a twostage evolution...M. Picault, The La Bellière gold and antimony district (French Armorican Massif): a two-stage evolution...Elsevier B.V. The La Bellière gold and antimony district (French Armorican Massif): a two-stage evolution...florent-cg@hotmail.fr Abstract The La Bellière gold district, in the Ligerian domain of the Armorican Massif...of France in term of production. It shows gold-bearing quartz veins neighboring with a complex network |
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| ANTIGUA AND BARBUDA ARGENTINA ARMENIA AUSTRALIA AUSTRIA AZERBAIJAN BAHAMAS BAHRAIN BANGLADESH BARBADOS...Vienna International Centre PO Box 100 1400 Vienna, Austria fax: +43 1 2600 29302 tel.: +43 1 2600 22417 email:...1400 Vienna, Austria Email: Official.Mail@iaea.org © IAEA, 2018 Printed by the IAEA in Austria April 2018.................................. 72 Polymetallic iron oxide breccia complex deposits ...................partial melting, such as pegmatites (Bancroft district and Charlebois Lake, Canada); (b) Disseminations |
 | Santos, M.S., Cruz, Simone C.P., Lobato, L.M., Mandetta, P., Burgos, C.M. (2022) Structural and hydrothermal evolution of the shear-zone-related iron-oxide enrichment in metavolcano-sedimentary rocks of the intracontinental araçuaí orogen: The case of the espírito santo iron deposit. Ore Geology Reviews, 140. 103719pp. doi:10.1016/j.oregeorev.2020.103719 | Journal (article/letter/editorial) |
| Hydrothermal Evolution Of The Shear-Zone-Related Iron-Ox‐ ide Enrichment In Metavolcano-Sedimentary Rocks...Intracontinental Araçuaí Orogen: The Case Of The Espírito Santo Iron Deposit M.S. Santos, S.C.P. Cruz, L.M. Lobato, P...Hydrothermal Evolution Of The Shear-Zone-Related Iron-Oxide Enrichment In Metavolcano-Sedimentary Rocks...Intracontinental Araçuaí Orogen: The Case Of The Espírito Santo Iron Deposit, Ore Geology Reviews (2020), doi: https://doi...HYDROTHERMAL EVOLUTION OF THE SHEAR-ZONERELATED IRON-OXIDE ENRICHMENT IN METAVOLCANO-SEDIMENTARY ROCKS |
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| geochemical anomalies record the passage of metal-bearing solutions through the fracture system of the range...anomalies are concluded to have been formed by metal-bearing solutions that diffused into the fault system in...thanks are given Mr. Ralph G. Johnson, Kremmling District Ranger, Arapaho National Forest, and staff for...of Mr. Don Price, Eagle District Ranger, and Mr. Don Campbell, Minturn District Ranger, White River National...is as shown in table 1, except that the Manitou Dolomite is absent. The same sequence occurs also in the |
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| Because of the discovery of the native copper and iron deposits in the Northern Peninsula, that region...contributions to our knowledge of the geology of the iron ranges remained scattered and fragmentary. The post-World...Northern Peninsula in both the Copper Country and the iron ranges by the U.S. and Michigan Geological Surveys...Ontonagon, Houghton, and Keweenaw Counties GROUP Iron and Dickinson Counties Jacobsville Sandstone u...Oronto Group a.. 3: co w C: _J 0 0 Marquette Iron District, Baraga and Marquette Counties diabase dikes |
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| Mii^ix^v BtmiiAU FERRY BUILDING - SAN FRANOSCC im^ ibiiiiiiliiii .III— Bb^aa^Aai^^AMM^Haai^^i^iaMHaMaMtaau... Copper. Scmi-mctals. Antimony. Tellurium. Iron. NON-METALS. 1. DIAMOND. Native carbon, C. ...Oroville of an apparent pipe of serpentinized rock bearing a resemblance to tlie diamond pipes of South Africa...diamonds have been obtained from the placers in this district and it leads all other districts in the State...Calaveras County It occurs in the : copper-bearing schists, and speci- mens have come from Copperopolis |
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| Oroville of an apparent pipe of serpentinized rock bearing a resemblance to the diamond pipes of South Africa...been obtained from the placers It seems in this district and it leads all other districts in the State...State. Calaveras County It occurs in the copper-bearing schists, and specimens have come from Copperopolis...intermixed. It is mixed with alum in the Sunset district. Lake County: At the Sulphur Bank quicksilver...Tuttletown and Jamestown. 8. GOLD. Native gold, Au. Isometric. arborescent gold-yellow. Good forms |
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| by a later and broader study does not belittle the im¬ portance of earlier investigations; where many papers...CARBONATES . Calcite . Magnesite Rhodochrosite Siderite Dolomite Ankerite Huntite Aragonite Strontianite . Witherite...a molar volume of 11-250 + 0-007 cc. CHEMISTRY Iron, zinc, and possibly manganese, may substitute partly...partly for magnesium in the natural mineral. The iron-bearing variety, found in Skye, has been called ferropericlase...Ferropericlase may alter to brucite with separation of iron oxide (Tilley, 1951). OPTICAL AND PHYSICAL PROPERTIES |
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| . . . . . . . 2.1 Iron and Steel Refiners . . . . . . . . . . . . . . . 2.1.1 Iron (Fe) . . . . . . .... . . . . . . . . . . . . . . . . . . 2.3.1 Gold (Au) . . . . . . . . . . . . . . . . . . 2.3.2 Silver.... . . . . . . 3.6 Kiruna-Type Magnetite Apatite Iron Ore . . . . . . . . . . . . . . . . 3.7 Granite.... . . . . . . . . . . . . . . . . . . . . . 4.7 Iron Oxide Copper Gold Deposits . . . . . . . . . . .... . . . . . . . . . . . . . 4.18 Lahn–Dill-Type Iron Deposits . . . . . . . . . . . . . . . . . . . |
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| never documented by geologists working in the district during its decades of maximum activity. Hence.................................................. Iron Deposits ···- ·································...Gogebic and Menominee iron districts also was 1911 to 1920. The Marquette district peaked during 1941 to...to 1950. With declines in both copper and iron production, more and m.ore mines became inaccessible and...AND KEWEENAW COUNTIES MARQUETTE IRON DISTRICT, MARQUETTE COUNTY IRON AND DICKINSON COUNTIES M inor felsile |
 | Velasco, F., Herrero, J. M., Yusta, I., Alonso, J. A., Seebold, I., Leach, D. (2003) Geology and Geochemistry of the Reocin Zinc-Lead Deposit, Basque-Cantabrian Basin, Northern Spain. Economic Geology, 98 (7) 1371-1396 doi:10.2113/gsecongeo.98.7.1371 | Journal (article/letter/editorial) |
| pyrite with dolomite as gangue. Microprobe analyses of different generations of dolomite revealed nonstoichiometric...with various amounts of iron (up to 14 mol % of FeCO3). Replacement of host dolomite, openspace filling of...accompanied by ore deposition and, locally, filling of dolomite sands and clastic sediments in karstic cavities...regional limestone, host-rock dolostone and ore-stage dolomite suggest an early hydrothermal alteration of limestone...dolomitization was followed by a second period of dolomite formation produced by the mixing of basinal metal-rich |
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| Italian mlcanoes Chris Kilburn & Bill McGuire 2. Au\'ergne Peter Cattermole 3. Iceland Thor Thordarson...catastrophe: A1ow11Pelee and the desrruction ~ 5 im-Pierre. Jfartinique Al\\yn Scarth Monitoring the... I made it a stipulation that e:ich en~ in rn:, ·st ,, ,u.d be fully referenced. After eight years the...in edutainment and , i,itor :nt·.!:.I~i·,1::.cor:,:im.: space nee taken up by specimens. Fortunatdy. ther....-s :,J r.:port too, ,, ith the n:di co, ery and im estigati, e cataloguing of an historic rr.ir;.:ralcull |
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| ----------------------------- * * Lake Albion mining district --- -- --- »« » -«- «« jvieadow v>reeK * "« Caribou...Mineralized areas Continued Page Caribou mining district -----«--"--..-----»«----. T net* .LJCIA.C T nlro....... ..... ...... ..... ..... Guinn Mountain district -. Conclusions --------------------- - - 64...of Front Range viewed to southwest across Middle St. Vrain Creek . 3. View west across Blue Lake to Pawnee...Pawnee Peak and Mount 4. View north across Middle St. Vrain Creek 5. View east across North Fork Middle |
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| creeks of the South Platte River, opening the Alma district in 1861. Engraving by Paul Frenzeny and Jules...Geology Geology of the Sweet Home mine and Alma district......................... 101 by Dean Misantoni...Alma mining district on the eastern slope of central Colorado’s M osquito Range. The district, near the...Mount Bross, 4.5 miles west of Alma. The Alma district opened in 1861 when prospectors, in one of the...rich, exhausted quickly. By 1864, the Alma mining district was largely deserted. Mining began anew in 1871 |
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| LIST OF SYMBOLS XV SOURCE ROCKS FOR METAL-BEARING FLUIDS l Konrad B. Krauskopf Crust versus mantle...aqueous phase Generation and emplacement of water-bearing magmas Generalizations regarding hydrothermal fluids...of aqueous phase lv,s Source Rocks for Metal-Bearing Fluids KONRAD B. KRAUSKOPF Stanford University...beginning is assumed to be that found in the troilite of iron meteorites (since the concentration of uranium and...Ta 1.0 ital 0.02 0.7 0.1 0.77 W 0.004 0.005 0.006 Au 0.09 0.01 0.0X Hg 0.21 0.01 0.06 ait 6 0.1 1 Pb Bi |
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| [V 'g>_...X uiu I U MUL-y '*£' .-»\ /fsVuMtOA! /'ST»„"^SUU5>»MAR1P0SA ) , 9\ S»N /r K. ^V \ "'J''"\BtNlT0\...source of a number of commercial products. The gem-bearing pegmatites of San Diego County have aroused special...Oroville of an apparent pipe of serpentinized rock bearing a resem- blance to the diamond pipes of Sonth...diamonds have been obtained from the placers in this district, and districts in the State. It it leads all...greasy. Luster metallic, sometimes dull, earthy. Iron-black to dark steel-gray. Streak gray. H. 1 2.09 |
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| performance in electronic systems, and tantalum-bearing alloys are especially valued for their thermal...Bastnaesite-Fluorite-Barite Deposit of the Kizilcaören District, Eskisehir, Turkey. G. Morteani and M. Satir (with...240 X Contents Geological Settingof Tantalum-Bearing Mineralization in the Caledonides of SE Ireland...Granite-Hosted Tantalum Deposits: An Approach via District Analysis. P. 1. Pollard (with 1 Figure) . . ....worked for feldspars used in porcelain manufacture. Johann Gadolin, former student of Torbern Bergman at the |
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| descriptive of structure and deposits in a single district. 3. Three papers on aviation as applied to exploration...interested in the search for and exploitation of metal-bearing ores. Metal-mining papers were last published in...Operation of the Blueberry Mine, Marquette Iron District. By R.S. Arcurmstp and L: S$: Caanot, Jr......: ihe Historical Outline of Mineral pieatccere im Moe es 55 5 BDL By Joun eee ‘By V. R. Garrias...Fractures of the Real del Monte Area, Teche Silver District, Mexico. By Epwarp WissEr. Geology of Lead-zinc-copper |
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| K. R.E. Starkey, Bromsgrove, U.K. N.J. Elton, St Austell, U.K. R.F. Symes, Sidmouth, U.K. A.D...now being generated from the company’s Labrador Iron Mine, prospects for some real activity at Parys...Mine worked a number of veins in the north face of Iron Crag, of which the Roughton Gill South Vein was...northern Lake District and include workings in Silver Gill, on Balliway Rigg and the workings in Iron Crag (which...fathom levels situated under and on the west side of Iron Crag. Other workings to be considered within the |
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| oxygen isotope ratios in fine-grained sedimentary dolomite in the Barney Creek Formation of the McArthur...surrounding the giant stratiform HYC Zn-Pb-Ag deposit. Dolomite within the halo shows an 18O-enriched and 13C-depleted...PDB), relative to normal Proterozoic sedimentary dolomite beyond the halo (δ18O = 20–23‰ and δ13C = 0 to...carbon isotope fractionation equation between dolomite and HCO3–, it is possible to estimate the temperature...carbon and oxygen isotope variations measured in dolomite and ankerite in a series of drill holes through |
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| galena that had been recently found in the Tenmile district, Summit County. In his booklet, which today would...number of rare minerals in the alkalic rocks of Iron Hill, Gunnison County. Colorado pegmatite bodies...Indications of the principal metals produced by each district will give the knowledgeable collector some hints...hints as to the principal ore minerals in each district. I have made no attempt to list directions to the...LOCALITIES BOULDER COUNTY Locality 1.-Gold Hill district, Copper King mine. Bravoite, cobaltite, garnierite |
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| stratigraphy and structure of the rocks of the district, sedimentary, igneous, and metamorphic; (3) the...to ore and gangue minerals; (4) the information bearing on the age of the deposit; and (5) the reasons...Schrifttum über die Lagerstätten in Nordeuropa ist im wesentlich englisch verfaßt, hauptsächlich deshalb...a stratigraphie et la structure des roches du district (roches sédimentaires, ignées et métamorphiques);...raisons justifiant la position assignée a ce dépôt au sein de la classification modifiée de Lindgren (pour |
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| NO C OST DATE 5 _._Z .5...5...Q. S...^^. .^.iM,s4L..(e. 19a.A.. DEPARTMENT OF THE INTEUIOR...CHARLES D. WALCOTT, DIRECTOR THE MENOMINEE IRON-BEARING DISTRICT OF MICHIGAN BY WILLIAM SHIRLEY BAYLEY ...of the Menominee area 34 Relations to other iron-bearing areas 34 Shape and size of the Menominee tongue...tongue Economic importance of the district Previous work in the district 35 Method of 33 35 36 - ...Falls of the Sturgeon 195 196 196 Randville dolomite 200 Distribution and topography 200 The northern |
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| Chapters on the Coeur d'Alene Mining District, the Blackbird Mining District, and the Sawtooth Mountains by...Chapters on the Coeur d'Alene Mining District and the Blackbird Mining District, and to Ben Sheppard for reviewing...reviewing the chapter on the Blackbird Mining District. Those who contributed photographs, or specimens...problems are with mine names and occasional1y mining district names. Mining districts, generally are not now...the Coeur d'Alene District is the name presently used for the entire silver district that runs from Kellogg |
