quartz vein containing telluride

quartz containing gold for sale. If vein quartz contains gold we get excited If barren such as bull quartz Photos of gold ores quartz telluride gold ore and gold specimens...

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Gold-silver telluride ores, Colorado, U.S.A., I

This sliver of rock, 38 mm long and up to 9 mm wide, of dull grey vein quartz, is charged with fine-grained grey ore minerals. It contains galena around small vugs, minor pyrite, and grey tellurides (not identified, but probably at least two Pb/Ag/Au species, such as hessite and petzite) which may amount to bonanza metal grades, with hundreds ...

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Gold distribution in As-deficient pyrite and telluride ...

12%a Quartz vein containing two generations of pyrite (G1 and G2). The G1 pyrite occurs as dense disseminations of aggregate masses in milky quartz (Qz-1), whereas the G2 pyrite is present as veins or veinlets in light gray quartz (Qz-2). Note that quartz hosting the G2 pyrite is intensively fractured. b The second and third generations of pyrite.

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LOW SULFIDE AU QUARTZ VEINS (MODEL 36a; Berger, 1986)

Sulfide minerals are usually present as finely disseminated grains in quartz and wall rocks. In some deposits, massive clots of arsenopyrite, as large as tens of cm, may be present locally. In rare examples, gold-bearing veins may contain massive stibnite (10 to 50 volume percent of the vein material) throughout the deposit (see Berger, 1993). 263

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A New Occurrence of Rheniite (ReS2) and Telluride ...

±molybdenite in quartz- and magnetite veins associated with sodic/potassic-calcic alteration. A late, epithermal-style, telluride-bearing stage, spatially related to carbonate-quartz veins with argillic alteration that contains minor amounts of Re-free molybdenite, …

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The Formation of the Quartz-Gold-Telluride Veins of the ...

The Emperor vein system lies on the eastern margin of the Tavua volcanic structure. This is of Miocene age and occurs in basalts(the Mba Volcanics) probably underlain at about 2 km by calcite-rich sediments (the Vatukoro Formation). The lodes are generally flatmakes, or steep fault fillings, or complex shatter zones, and consist of quartz and altered wall rock.

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Photos of gold ores, quartz, telluride gold ore and gold ...

The most prominent is native gold - most of the native gold contains a small amount of silver, copper, platinum, etc. Telluride minerals are the most common minerals which contain significant gold in their make up. They include: Petzite (Ag,Au) 2,Te, with a gold content of about 25 per cent.

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Boulder County Colorado Mining Districts – Western Mining ...

Most of the valuable ore came from the intersection of veins. The fissure veins contain telluride minerals, chalcedonic quartz, pyrite and small amounts of free gold, sphalerite, marcasite, fluorite, and calcite. Tellurides occur as small blades 2.5 mm or less in length. The tellurides occur in seams within the fissure veins, striking northwest.

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AU-AG-TE VEIN DEPOSITS (MODEL 22b; Cox and Bagby, 1986)

Vein-type deposits: Ore minerals include gold-silver telluride minerals (calaverite, sylvanite), native gold and (or) native tellurium, and other telluride minerals (most commonly krennerite, petzite, hessite, coloradoite, melonite, altaite, tetradymite). Deposits also contain variable amounts of common base metal sulfide and sulfosalt minerals

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COMPOSITIONAL VARIATIONS OF Au-Ag TELLURIDE …

telluride minerals is within epithermal quartz veins associated with volcanic or subvolcanic rocks. Epithermal deposits also contain variable amounts of the common base metal sulfides and sulfosalts. Sampling and Analyses This study focuses on two veins from Arinem deposit such as Arinem and Bantarhuni veins, in which Te-

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Silver-rich telluride mineralization at Mount Charlotte ...

Sulfide–telluride mineralization. The D4 quartz veins exposed on the 22 level contain blue fluorescent scheelite and pyrite, rare chalcopyrite, sphalerite, and native gold. Scheelite forms orange aggregates up to 10 cm long (Fig. 6d). The vein selvages in GMD unit 8 comprise an inner "bleached" albite–sericite–ankerite and an outer ...

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Quartz Vein - an overview | ScienceDirect Topics

The pyrite vein and quartz vein samples from the Dapingzhang area were produced from the copper–lead–zinc–sulfur polymetallic sulfide deposit, which is in the town of Dapingzhang, Lantsang area, Pu'er, Yunnan Province. A few pure lump ores from the pyrite veins and quartz veins were used as raw materials and crushed to 0.5–1 mm. Pure pyrite was picked from a pyrite vein as the pyrite ...

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Ore petrography and chemistry of the tellurides from the ...

(iii) polymetallic sulfide–quartz stage: the principal gold mineralization stage, expressed as quartz veins containing pyrite, galena, chalcopyrite, sphalerite and telluride veinlets crosscutting the early quartz veins. (iv) Carbonate–quartz stage: expressed as quartz and calcite veinlets and stockworks, with a small amount of sericite ...

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Gold distribution in As-deficient pyrite and telluride ...

a Quartz vein containing two generations of pyrite (G1 and G2). The G1 pyrite occurs as dense disseminations of aggregate masses in milky quartz (Qz-1), whereas the G2 pyrite is present as veins or veinlets in light gray quartz (Qz-2). Note that quartz hosting the G2 pyrite is intensively fractured. b The second and third generations of pyrite.

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Telluride (ARDF #VA065) Au

Data summarized by Goldfarb and others (1997) show that gold-bearing quartz veins in the Valdez Group commonly contain pyrite, arsenopyrite, carbonate minerals, chlorite, and white mica and formed from water-rich fluids with 5 to 15 mole percent CO2 and significant amounts of CH4, N2, and H2S.

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quartz vein containing telluride