 | | Journal (issue) | | Basin | May 21 | Pueblo, CO Trip leader: Jeff May San Juan River Raft Trip | June 14-16 | Bluff, UT Trip...Gary Gianniny, Fort Lewis on the Water (FLOW) Colorado Glaciology | June 25 | Minturn/Vail, CO Trip leader:...Tournament Arrowhead Golf Club 15 On The Rocks: San Juan River Raft Trip 21 RMAG Powder River Basin Symposium...of exceptional glacial features in the central Colorado mountains » CONTINUED FROM PAGE 12 outcrop...and a fossil dig at a nearby quarry • Raft the San Juan River on a three-day float and see spectacularly |  | Lüders, Volker, Romer, Rolf L., Gilg, H. Albert, Bodnar, Robert J., Pettke, Thomas, Misantoni, Dean (2009) A geochemical study of the Sweet Home Mine, Colorado Mineral Belt, USA: hydrothermal fluid evolution above a hypothesized granite cupola. Mineralium Deposita, 44 (4) 415-434 doi:10.1007/s00126-008-0221-3 | Journal (article/letter/editorial) | | geochemical study of the Sweet Home Mine, Colorado Mineral Belt, USA: hydrothermal fluid evolution above a...ite–topaz– muscovite–fluorite and subsequent hübnerite and sulfide– fluorite–rhodochrosite mineralization...Geosciences, Virginia Tech, Blacksburg, VA 24061, USA T. Pettke Institute of Geological Sciences, University...Switzerland D. Misantoni Colorado Calumet Company Inc., P.O. Box 1169, Golden, CO 80402, USA al assemblage was...Keywords Mo porphyry deposits . Climax . Sweet Home . Colorado Mineral Belt . Rhodochrosite . Fluid inclusions |  | Lecumberri-Sanchez, Pilar, Romer, Rolf L., Lüders, Volker, Bodnar, Robert J. (2014) Genetic relationship between silver–lead–zinc mineralization in the Wutong deposit, Guangxi Province and Mesozoic granitic magmatism in the Nanling belt, southeast China. Mineralium Deposita, 49 (3) 353-369 doi:10.1007/s00126-013-0494-z | Journal (article/letter/editorial) | | the world's total reserves of tungsten are in China and most tungsten deposits are located in the Nanling...explores the potential genetic relationship between tungsten–tin (W–Sn) mineralization and shallower Ag–Pb–Zn...from S isotopic compositions of minerals. The hübnerite age (92.3–104.4 Ma) indicates that the Wutong...Nanling range. Keywords Cathaysia . Yanshanian . Hübnerite dating . Chalcopyrite disease . Fluid inclusions...Virginia Tech, 4044 Derring Hall, Blacksburg, VA 24061, USA e-mail: pilar@vt.edu R. L. Romer : V. Lüders Helmholtz |  | | Journal (article/letter/editorial) | | Argentina, and James R. Craig, Blacksburg, VA, USA With 5 figures and 1 table Márquez-Zavalía, M. F...920, hosted mainly by quartz and coexists with hübnerite and Bi minerals. Tellurium occurs locally in grains...minerals occur in quartz, generally accompanied by hübnerite, pyrite, chalcopyrite, and Bi- and Sn-bearing...idiomorphic minerals such as galena, pyrite, enargite, hübnerite, quartz, and barite. Brecciated structures are...analysis, not to averages. N. A. = not analized; SS = San Salvador vein; LR = La Rosario vein. Weight % Te |  | | Journal (article/letter/editorial) | | solid-solution series between hübnerite (MnWO4) and ferberite (FeWO4), is the main tungsten-bearing ore mineral...mineral in vein-type tungsten deposits. Much progress has been made on characterizing the mineralizing fluids...vein-type tungsten deposits. The modeling results indicate that solubilities of hübnerite and ferberite...pH=4-6) reach up to hundreds of ppm. The predominant tungsten, manganese, and iron species in fluids are HWO4―...mechanisms precipitating hübnerite and ferberite from acidic hydrothermal fluids. Hübnerite and ferberite are |  | | Journal (article/letter/editorial) | | University] at 06:43 31 December 2014 mine in Colorado, and they found virtually the entire series, with...include the rare minerals zinkenite, jamesonite, hübnerite, chalcocite, bismuth, bismuthinite, cassiterite...from the Sweet Home mine, near Alma, Park County, Colorado, where it occurs with rhodochrosite, fluorite...1997). Other Colorado localities include the Silverton-Eureka district, San Juan County, where tetrahedrite...the Longfellow mine, Red Mountain district, San Juan County (D. Bunk, pers. comm., 2010). Well-formed crystals |  | | Journal (issue) | | Cooper Nottingham, England Anthony R. Kampf L.A. County Mus. of Nat. Hist. Los Angeles, CA Joseph A. Mandarino...Bishop copper prospect near Lynch Station, Campbell County, Virginia . . . . . . . . . . . . . . . . . . ...phosphate mineral from the Gold Quarry mine, Eureka County, Nevada . . . . . . . . . . . . . . . . . . . 237...com Colorado Chapter Order now!! Minerals of Colorado Order from: Friends of Mineralogy—Colorado Chapter...BISHOP COPPER PROSPECT near Lynch Station, Campbell County, Virginia Henry Barwood Route 3, Box 144 Auburn |  | | Journal (article/letter/editorial) | | pohwatp@si.edu FLUORITE Elmwood Mine, Carthage, Smith County, Tennessee R egular readers of this column will...sphalerite, 8.8 cm high, from the Elmwood mine, Smith County, Tennessee. Note the gemmy corners of the cube...pieces are all from the fluorspar district, Hardin County, Illinois. Cincinnati Museum Center specimens,...cubes from Trestia, Transylvania region, Maramures County, Romania, appears to be a complete replacement...describe is difficult. The Burnt Hill tungsten mine, York County, New Brunswick, is located in a metamorphic |  | | Journal (article/letter/editorial) | | Geochemistry of cassiterite and wolframite from tin and tungsten quartz veins in Portugal A.M.R. Neiva ⁎ Department...others are heterogeneous. Inner patches, rich in a hübnerite component, rarely occur in crystals from the Filharoso...doi:10.1016/j.oregeorev.2006.05.013 Most tin and tungsten deposits are spatially associated with granitic...granitic rocks. Tin deposits that contain subordinate tungsten have been reviewed by Heinrich (1990), while ...Reviews 33 (2008) 221–238 the deposits in which tungsten is the dominant metal and the next most abundant |  | | Journal (article/letter/editorial) | | wolframites have a wide range of compositions, from hübnerite- (MnWO4) to ferberite-rich (FeWO4). Deposition...have been proposed to govern the wolframite H/F (hübnerite/ferberite ratio) defined as 100 at. Mn / (Fe +...in the fluid which promoted the deposition of hübnerite. Therefore, the H/F ratio can be used to distinguish...environments in perigranitic W ore-forming systems. Hübnerite is a simple mineralogical indicator for a strong...control on W deposition. Keywords: wolframite, hübnerite, W deposition, magmatic control, W ore deposit |  | | Journal (article/letter/editorial) | | Bert Ottens specimen and photo. The Yaogangxian Tungsten Mine Downloaded by [Florida International University]...University] at 20:11 23 August 2013 Yizhang County, Chenzhou, Hunan Province, China BERTHOLD OTTENS Klingenbrunn-Bahnhof...economy, and although perhaps not a major metal, tungsten still plays an important role (Maby 2000). China...of the world’s tungsten and contains nearly 45 percent of the world’s known tungsten reserves. Clearly...Clearly, tungsten figures prominently in China’s overall mining industry. In the year 2000, about 37,000 tons |  | Yuan, Shunda, Peng, Jiantang, Hu, Ruizhong, Li, Huimin, Shen, Nengping, Zhang, Dongliang (2008) A precise U–Pb age on cassiterite from the Xianghualing tin-polymetallic deposit (Hunan, South China) Mineralium Deposita, 43 (4) 375-382 doi:10.1007/s00126-007-0166-y | Journal (article/letter/editorial) | | deposits in this region, reveal that the large-scale tungsten– tin mineralization in the central Nanling region...2006; U–Pb dating for cassiterite, columbite, and hübnerite, Gulson and Jones 1992; Romer and Wright 1992;...Moreover, in terms of crystal chemistry, like in hübnerite (e.g., Romer and Lüders 2006), lead is unlikely...many large-scale tungsten and tin deposits with more than 90% of the Chinese tungsten Miner Deposita...43:375–382 resources and is one of the largest tungsten–tin polymetallic metal provinces on Earth. The |  | | Journal (article/letter/editorial) | | “magnesiowolframite”, 35 – 64 mol.% ferberite and 7–16 mol.% hübnerite). The origin of the hydrothermal mineralization...Wolframite as a solid solution of ferberite and hübnerite (FeWO4 and MnWO4) together with scheelite are...are the most common minerals of primary tungsten ore deposits. The wolframite occurs in numerous mineral...also in Pb – Zn ore veins and scheelite skarns. Hübnerite is typical also for meso- to epithermal subvolcanic...subvolcanic ore vein deposits. Locally, the ferberite – hübnerite solid solution shows elevated contents of Nb, |  | | Journal (article/letter/editorial) | | MICHAEL J. GOBLA 19055 East Bethany Place Aurora, Colorado 80013 gobla@copper.net Unless otherwise noted...Indian Queen mine ca. 1905 at Farlin, Beaverhead County. 208 ROCKS & MINERALS Downloaded by [University...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; |  | | Journal (article/letter/editorial) | | wolframite from Mn-rich and Fe-poor wolframite (hübnerite) to Mn-poor and Fe-rich wolframite (ferberite)...variation is observed in a zoned crystal, in which hübnerite is rimmed by ferberite. This variation may indicate...ranging from Mn-rich and Fe-poor wolframite (hübnerite) to Mnpoor and Fe-rich wolframite (ferberite)...paragenetic sequence has been reported in the Grey River tungsten deposit, Newfoundland, Canada (Chatterjee and...of the Henderson porphyry molybdenum deposit, Colorado, with experimental and theoretical models of porphyry |  | Ortelli, M., Kouzmanov, K., Wälle, M., Ubrig, N., Casanova, V. (2018) Fluid Inclusion Studies in Opaque Ore Minerals: I. Trace Element Content and Physical Properties of Ore Minerals Controlling Textural Features in Transmitted Near-Infrared Light Microscopy. Economic Geology, 113 (8) 1845-1860 doi:10.5382/econgeo.2018.4615 | Journal (article/letter/editorial) | | such as sphalerite, cassiterite, scheelite, or hübnerite (Roedder, 1971). With the implementation of the...Analyses San Cristobal (Peru) San Cristobal (Peru) Morococha (Peru) Morococha (Peru) Butte (USA) Butte...Butte (USA) Butte (USA) Butte (USA) Butte (USA) Butte (USA) Butte (USA) Butte (USA) Pereta (Italy) Polymetallic...Abbreviations: cv = covellite, en = enargite, hü = hübnerite, mo = molybdenite, O = completely opaque, py =...12,000 to 2,000 cm–1 (800–5,000 nm). A quartz-tungsten-halogen source and a CaF2 beam splitter with an |  | Bobos, Iuliu, de Sá, Carlos Marques, Noronha, Fernando (2021) Mineralogy, Fluid Inclusions, and Oxygen Isotope Geochemistry Signature of Wolframite to Scheelite and Fe,Mn Chlorite Veins from the W, (Cu,Mo) Ore Deposit of Borralha, Portugal. Minerals, 12 (1) 24 doi:10.3390/min12010024 | Journal (article/letter/editorial) | | creativecommons.org/licenses/by/ 4.0/). 1. Introduction Tungsten mineralization in magmatic-hydrothermal deposits...scheelite (CaWO4 ). Wolframite is the main dominated tungsten mineral in granite-related systems, whereas in...of f O2 than the Mn2+ end-member wolframite (hübnerite) and the composition of ferberite might also be...during wolframite crystallization influence the hübnerite vs. ferberite proportions of wolframite [27]....a mixed composition between ferberite (F) and hübnerite (H), where the Fe amount of 0.53 atoms per formula |  | Putz, Hubert, Paar, Werner H., Topa, Dan, Makovicky, Emil, Roberts, Andrew C. (2006) Catamarcaite, Cu6GeWS8, a new germanium sulfide mineral species from Capillitas, Catamarca, Argentina: description, paragenesis and crystal structure. The Canadian Mineralogist, 44 (6) 1481-1497 doi:10.2113/gscanmin.44.6.1481 | Journal (article/letter/editorial) | | digenite, chalcocite, covellite, sphalerite, hübnerite, luzonite, wittichenite, several Ge-bearing sulfides...catamarcaite, new mineral species, copper germanium tungsten sulfide, crystal structure, kiddcreekite, La Rosario...enargite–luzonite, tennantite – tetrahedrite – goldfieldite, hübnerite, bismuth sulfosalts (e.g., aikinite–bismuthinite...ore is spatially associated with subordinate hübnerite, pyrite, chalcopyrite, tennantite, wittichenite...rarely, the tungsten–germanium sulfide can be observed in direct contact with hübnerite (Fig. 2b). The |  | Talla, Dominik, Beran, Anton, Škoda, Radek, Losos, Zdeněk (2017) Polarized FTIR spectroscopic examination on hydroxylation in the minerals of the wolframite group, (Fe,Mn,Mg)[W,(Nb,Ta)][O,(OH)]4. American Mineralogist, 102 (4) 867-875 doi:10.2138/am-2017-5664 | Journal (article/letter/editorial) | | present—besides scheelite, CaWO4—the most important tungsten ore mineral group. They typically occur within...end-member compositions—FeWO4 (ferberite) and MnWO4 (hübnerite). Sporadically, Zn forms an essential component...hydrous phase into the structure of this important tungsten ore mineral. Experimental methods Sample description...Supplemental1 Table 1; six samples are dominated by the hübnerite component, and five samples by the ferberite component...Fe(NO3)2·9H2O for ferberite, Mn(NO3)2·4H2O for hübnerite and Mg(NO3)2·6H2O for huanzalaite, respectively |  | | Journal (article/letter/editorial) | | FROM THE HAVEY PEGMATITE, POLAND, ANDROSCOGGIN COUNTY, MAINE. W. B. Simmons and A. U. Falster, Maine...pegmatite in Poland, Androscoggin County, Maine, is part of the Oxford County pegmatite field that occurs in...mineral specimens. As is common to many Oxford County pegmatites, the Havey pegmatite has a well-formed... (columbite-tantalite) are mined for their tin, tungsten, and tantalum, respectively. This is done unethically...comprehensive study yet analyzing the ferberite-hübnerite (FeWO4–MnWO4) solid-solution series. Wolframite |  | | Journal (article/letter/editorial) | | Stanford University, Stanford, California 94305–2115, USA Robert L. LINNEN Department of Earth Sciences, University...Stanford University, Stanford, California 94305–2115, USA Abstract The speciation of tin in nine hydrous haplogranitic...granitic systems (see Lehmann 1990 for a review). Tungsten, niobium and tantalum also concentrate in such...cotype specimen from the Foote mine, North Carolina, USA; crystal-structure information from Kossiakoff &...foils, models for W and Ta include a sample of hübnerite, (Mn0.7Fe0.3)WO4, from Montebras, Creuse, France) |  | | Journal (article/letter/editorial) | | Prague 1, CZ-115 79, Czech Republic The tin-tungsten Krásno ore district near Horní Slavkov (Slavkovský...include arsenopyrite, fluorapatite, fluorite, hübnerite, chalcopyrite, carpholite, cassiterite, quartz...topaz and scheelite. Key words: Sn-W ores; tin-tungsten mineralization; mining history; ore geology; mineralogy;...occurrences in the Krásno Horní Slavkov area and tungsten ores, by ruling of February 11, 1961, with cassiterite...chalcopyrite as ore minerals. The mining of tin and tungsten ores was terminated in January 1991. The Rudné |  | | Journal (article/letter/editorial) | | Ramírez and Grundvig 2000) hosts the main tin–tungsten deposits of the Navasfrías district (geographic...(EMPA) of cassiterite, 13 of ferberite, 20 of hübnerite, 10 of ixiolite, 45 of Nb–Ta-rich rutile, and...crystal structure of cassiterite as trace elements. Tungsten is generally related to the presence of wolframite...dissolved and recrystallized later as wolframite II (hübnerite) (Fig. 4d). The average ferberite composition...mineralization event. The mean formula of this hübnerite I is (Fe0.41Mn0.58)Σ1WO4, whereby Nb substitutes |  | | Journal (volume) | | relationships Rick Turner and Michael S. Rumsey 3-46 Hübnerite in Alpine-type fissure veinlets in the Cambrian... (1986). Lithogeochemical study of some Mendip county rocks with particular reference to boron. Bulletin... 46 Journal of the Russell Society (2010) HÜBNERITE IN ALPINE-TYPE FISSURE VEINLETS IN THE CAMBRIAN...Bridgend, CF32 OPU The rare manganese tungstate, hübnerite, has been discovered as discrete bladed crystals...ore bed at two localities in the Harlech Dome. Tungsten minerals are rare in Wales, but the presence of |  | | Journal (article/letter/editorial) | | some people who knew him. Hal Miller of Boulder, Colorado wrote: In the fall of 1955 Butte was an exciting...is rare. Years later, however, Ed visited me in Colorado and revealed the best of all the Butte digenites—a...confused with Colorado specimens, but at that time rhodochrosites were not coming out of Colorado. [Quoted...able to acquire the balance of the lot. The Cohen tungsten mine in the Dos Cabezas Mountains, Cochise Co...some extraordinary hübnerite crystals from the Adams mine, San Juan Co., Colorado. These needed to be |
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