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huebnerite

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Journal Article
Journal: Economic Geology
Published: 01 July 1981
Economic Geology (1981) 76 (4): 978–979.
Journal Article
Journal: Economic Geology
Published: 01 July 1980
Economic Geology (1980) 75 (4): 523–537.
...T. Casadevall; R. O. Rye Abstract The Tungsten Queen mine, Vance County, North Carolina, is a large quartz-huebnerite vein deposit of late Precambrian or early Paleozoic age that has undergone middle Paleozoic regional metamorphism of amphibolite grade. The preservation of large banded huebnerite...
Journal Article
Journal: Economic Geology
Published: 01 May 1938
Economic Geology (1938) 33 (3): 339–348.
...Vincent Paul Gianella Abstract In the Monitor district, are small irregular gold-silver deposits, in which huebnerite is present along with minerals characteristic of the epithermal zone. The gangue is chiefly quartz and rhodochrosite. The paragenesis of the huebnerite indicates...
Journal Article
Published: 01 May 2009
Geochemistry: Exploration, Environment, Analysis (2009) 9 (2): 125–138.
... and hydrologic features that may be used to better understand the provenance and evolution of the water. Veins containing fluorite, huebnerite, and elevated molybdenum concentrations are temporally and perhaps genetically associated with the emplacement of high-silica rhyolite intrusions. Both the rhyolites...
FIGURES | View All (10)
Journal Article
Journal: Economic Geology
Published: 01 May 1948
Economic Geology (1948) 43 (3): 181–206.
... the granite, the sericite and rhodochrosite, generally more distant therefrom. The metal-bearing minerals are molybdenite, pyrite, sphalerite, tetrahedrite, chalcopyrite, galena, gratonite, scheelite, and huebnerite, the huebnerite, tetrahedrite, and pyrite being most abundant. The scheelite and molybdenite...
Journal Article
Journal: Economic Geology
Published: 01 July 1980
Economic Geology (1980) 75 (4): 515–522.
... been worked to a depth of nearly 520 m and contains eight en echelon ore lodes that plunge 42 degrees to 65 degrees between S 10 degrees E and S 10 degrees W. Ore lodes commonly are encased in thin lenses of quartz-sericite greisen. The principal ore mineral is huebnerite and is accompanied...
Journal Article
Published: 01 April 1945
American Mineralogist (1945) 30 (3-4): 97–110.
...William A. White Abstract The tungsten deposit near Townsville is in an area which heretofore has not been known to be mineralized. The dominant ore mineral is huebnerite which occurs in a quartz vein containing much fluorite and sericite as well as small quantities of rhodochrosite, sulfides...
Journal Article
Journal: Economic Geology
Published: 01 March 2002
Economic Geology (2002) 97 (2): 415–423.
... mapping, and infrared microscopy. The chemical composition of wolframite changes from a nearly pure huebnerite (MnWO 4 ) core to nearly pure ferberite (FeWO 4 ) rims. This zonation correlates with a decrease in infrared transmittance from core to rims of wolframite crystals as demonstrated by Fourier...
FIGURES | View All (8)
Journal Article
Journal: Economic Geology
Published: 01 May 1995
Economic Geology (1995) 90 (3): 603–615.
... rutile, and columbite- tantalite exsolutions in cassiterite. In addition, discrete grains of columbite-tantalite and microlite locally occur in the pegmatites. Wolframite is represented by huebnerite and is associated with the last stage of cassiterite deposition, occurring in late vugs and/or quartz...
Journal Article
Journal: Economic Geology
Published: 01 February 1994
Economic Geology (1994) 89 (1): 150–157.
... by synthesizing wolframite, ferberite, and huebnerite from Na 2 WO 4 . 2H 2 O + FeCL 2 . 4H 2 O and/or MnCl 2 . 4H 2 O in a temperature range from 200 degrees to 420 degrees C. Significant temperature dependence is obtained from oxygen isotope fractionations in the quartz-cassiterite, quartz-wolframite...
Journal Article
Journal: Economic Geology
Published: 01 August 1992
Economic Geology (1992) 87 (5): 1253–1264.
... an Mn-Pb-base metal association, and are composed of significant quantities of base metal-bearing manganese oxides. Bixbyite, braunite, hausmannite, huebnerite, jacobsite, and pyrochroite occur predominantly only in hydrothermal deposits, whereas chalcophanite, coronadite, crednerite, delta -MnO 2...
Journal Article
Journal: Economic Geology
Published: 01 November 1986
Economic Geology (1986) 81 (7): 1753–1759.
... metasedimentary rocks.Surface exposures of rubble and limited outcrop are extensively leached; molybdenum occurs as molybdite oxides and tungsten occurs in both ferberite and huebnerite end members of the wolframite series. There is an apparent zonation from an upper tungsten-topaz zone capped by massive silica...
Journal Article
Journal: Economic Geology
Published: 01 July 1981
Economic Geology (1981) 76 (4): 844–873.
... and are enriched in F, Sn, and Mo. The hydrothermal system commonly contains molybdenite grades above 0.30 percent and is characterized by intense K metasomatism and an abundance of fluorite and/or topaz. Tungsten is common and occurs as huebnerite or wolframite. The deposits are enriched in tin. The alkali-calcic...
Journal Article
Published: 01 April 1981
American Mineralogist (1981) 66 (3-4): 298–308.
... of monoclinic symmetry with both ferberite (FeWO 4 ), and huebnerite (MnWO 4 ), down to at least 400°C. The interplanar spacing of the 200 reflection of these solid solutions is also observed to vary linearly with composition. Solid solution is very limited between monoclinic and tetragonal tungstates. Less...
Series: Economic Geology Publishing Company, Economic Geology Publishing Company
Published: 01 January 1981
DOI: 10.5382/AV75.10
EISBN: 9781934969533
.... This caused stockwork fracturing of host rocks and pressure quenching of aplitic cupolas. Fracture filling by quartz, molybdenite, pyrite, fluorite, topaz, and/or huebnerite formed the orebodies. ...
Journal Article
Journal: Economic Geology
Published: 01 November 1970
Economic Geology (1970) 65 (7): 875–882.
... stock, and all the veins encircle the stock.Economic deposits were formerly mined but active mining has now ceased. The mineralogy is simple. Wolframite, huebnerite, and scheelite are the principal ore minerals along with sulfides and oxide minerals. Quartz is the prevalent gangue and sericite...
Image
F ig . 3. Photographs of wolframite crystals. a. Aggregate of idiomorphic w...
Published: 01 March 2002
the distribution of Fe (c) and Mn (d). In d, the insert box corresponds to detailed X-ray maps (e to h) (20 kV, 50 nA, counting time 1 s). e. to h. X-ray maps showing the distribution of Fe and Mn in rim (e and f) and core (g and h). Scale bars = 100 μm. fer = ferberite; hue = huebnerite; py = pyrite; sid
Journal Article
Journal: Economic Geology
Published: 01 November 2009
Economic Geology (2009) 104 (7): 1085–1086.
... Balassone, and Nicola Mondillo 267 Vol. 104, No. 5, 2009 Experimental study on metasomatism in huebnerite–CaCl 2 solution system— Itoe Tamura, Naotatsu Shikazono, and Masataka Nakata 276 Vol. 50, No. 1, 2009 In situ U-Pb and trace element analysis of accessory...
Journal Article
Published: 01 January 2001
European Journal of Mineralogy (2001) 13 (1): 159–165.
..., manganocolumbite, manganotantalite, huebnerite, and Hf-rich zircon. Schiavinatoite was found as a small portion of one greyish-pink well-formed flattened bipyramidal crystal about 4 mm across, most of which is Nb-rich behierite (see Table 2 and Fig. 1 ); the observed forms are a first and a second order...
FIGURES
Series: Society of Economic Geologists Guidebook Series
Published: 01 January 2006
EISBN: 9781934969915
... oxide veins has increased compared to the last stop. The rock between the vein halos is pervasively altered to clay, sericite with disseminated iron oxide. Along some of the vein walls, boxworks of iron oxide and quartz are abundant. Fluorite, rhodochrosite, ferrimolybdite and huebnerite have been...
FIGURES