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tungsten

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Journal Article
Published: 28 February 2017
European Journal of Mineralogy (2017) 29 (5): 897-905.
...Dan Holtstam; Luca Bindi; Ulf Hålenius; Ulf B. Andersson Delhuyarite-(Ce) is a new mineral (IMA no. 2016-091) with ideal formula Ce 4 Mg(Fe 3+ 2 W)□(Si 2 O 7 ) 2 O 6 (OH) 2 . It is named after Juan and Fausto de Elhuyar (Delhuyar), chemists and metallurgists, who in 1783 isolated tungsten metal...
FIGURES
Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2405(01)
... of the Earth's accretion. Tungsten isotopic considerations are important for understanding the early history of the Earth. The small excess of 182 W in the bulk silicate Earth (BSE) compared to the isotopic composition of chondrites indicates that core formation occurred during the lifetime of the now-extinct...
Journal Article
Published: 01 June 2000
Mineralogical Magazine (2000) 64 (3): 377-388.
FIGURES | View All (7)
Journal Article
Published: 01 December 1999
The Canadian Mineralogist (1999) 37 (6): 1431-1438.
Journal Article
Published: 01 October 1998
The Canadian Mineralogist (1998) 36 (5): 1211-1216.
Journal Article
Published: 01 June 1998
Mineralogical Magazine (1998) 62 (3): 421-429.
Journal Article
Published: 01 August 1996
The Canadian Mineralogist (1996) 34 (4): 745-768.
Journal Article
Published: 01 September 1994
The Canadian Mineralogist (1994) 32 (3): 567-574.
Journal Article
Journal: Economic Geology
Published: 01 November 1991
Economic Geology (1991) 86 (7): 1401-1433.
...P. J. Pollard; R. G. Taylor; R. P. Taylor; David I. Groves Abstract Tin with associated tungsten and rare earth element mineralization at the Zaaiplaats mine is hosted by alkali feldspar granites of the Lebowa Granite Suite which intrude granophyric granites of the Rashoop Granophyre Suite. From...
Series: GSA Special Papers
Published: 01 January 1990
DOI: 10.1130/SPE248-p55
... of 22, and the iron is also enriched by a similar factor, which indicate that arsenic is associated with pyrite in this sample; (3) antimony is enriched in the vitrinite concentrates of the three foreign coal samples; (4) tungsten is enriched in the vitrinite concentrates of the four samples where...
Journal Article
Journal: Geology
Published: 01 April 1987
Geology (1987) 15 (4): 337-340.
Journal Article
Journal: Economic Geology
Published: 01 November 1985
Economic Geology (1985) 80 (7): 1872-1895.
...John R. Bowman; J. J. Covert; A. H. Clark; G. A. Mathieson Abstract Contact skarn formation at the CanTung scheelite deposit (Tungsten, Northwest Territories, Canada) involved replacement of calcitic marbles by garnet-pyroxene, pyroxene-pyrrhotite, amphibole-pyrrhotite, and bidtite-pyrrhotite...
Journal Article
Journal: Economic Geology
Published: 01 August 1984
Economic Geology (1984) 79 (5): 883-901.
Journal Article
Published: 01 January 1983
Bulletin de la Société Géologique de France (1983) S7-XXV (1): 71-82.
... France sedimentary structures silicates soft sediment deformation spatial variations statistical analysis tin trace elements tungsten Western Europe ...
Journal Article
Journal: Economic Geology
Published: 01 November 1982
Economic Geology (1982) 77 (7): 1725-1738.
... of and hosts to several tungsten and mostly separate, minor tin occurrences. Domain 2 is characterized by sparse low-amplitude magnetic anomalies. Tin granites are common and most deposits also have minor wolframite occurrences.Gamma-ray spectrometer measurements have been made over outcrops of most granitoids...
Journal Article
Journal: Economic Geology
Published: 01 April 1971
Economic Geology (1971) 66 (2): 215-225.
...F. S. Turneaure Abstract Plutonic tin and tungsten deposits, subvolcanic tin, silver, and zinc deposits, conditions of formation GeoRef, Copyright 2008, American Geological Institute. 1971 ...
Journal Article
Journal: Economic Geology
Published: 01 November 1970
Economic Geology (1970) 65 (7): 889-892.
Journal Article
Journal: Economic Geology
Published: 01 November 1970
Economic Geology (1970) 65 (7): 875-882.
...A. Mannan Sheikh Abstract Las Guijas tungsten district is located 58 miles southwest of Tucson, Arizona. The area studied has six pre-Quaternary rock units: granite, granite dikes, volcanic breccia, andesite and rhyolite dikes, black biotite minette, and sedimentary rocks of Cretaceous age...
Journal Article
Journal: Economic Geology
Published: 01 October 1970
Economic Geology (1970) 65 (6): 609-680.
... available field evidence. Some 225 specimens were analyzed representing 53 deposits and several ore types, chiefly the tin and tungsten ores.The stratigraphic record suggests that ores of the subvolcanic setting of central and southern Bolivia formed at depths on the order of 350 to 2,000 m and at total...
Journal Article
Journal: Economic Geology
Published: 01 August 1970
Economic Geology (1970) 65 (5): 592-593.