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electrum vein in quartz

  • 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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  • The Geology of Hydrothermal Quartz Veins Gold mining

    The Geology of Hydrothermal Quartz Veins that are Gold Bearing When you first look at a quartz vein in a rock it looks like a very narrow vein but in reality a quartz vein develops into a sheet like body of quartz or other mineral that is carried in the cracks and fissures in the rock Pure Gold and Electrum; Gold Occurrences in Ohio; Land

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  • Quartz

    Quartz is a mineral composed of silicon and oxygen atoms in a continuous framework of SiO 4 siliconoxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO 2.Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar Quartz exists in two forms, the normal quartz and the high temperature quartz

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  • Electrum Project TUDOR GOLD

    Like the nearby Valley of the Kings deposit, gold and silver mineralization occurs as coarse electrum in several generations of quartz carbonate veins and vein breccias hosted within a deformed island arc related sequence. The intermediate to low sulphidation mineralization is present in most of the veins with pyrite, sphalerite, galena and

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  • Structure of a High Grade, Electrum Bearing, Quartz

    electrum bearing quartz carbonate veins. These quartz carbonate veins exist as dense stockwork and stockwork breccia, and as parallel, decimetre to metre spaced, lay ered vein sets. They, in turn, are cut by quartz carbonate veins containing base metal sulphide (sphalerite, galena, chalcopyrite), electrum and silver sulphide mineralization.

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    gold and 10,000 gpt silver. The vein dips with the hill side. The vein hanging wall is exposed for sn area of approximately 20 square metres. ThisveinandseverslothasfnthcKyuquotpeninsulaweredriUedby Taywin Resources in the late 1980% ( See vt Report 17.763). This drilling showed that the vein was of limited size, probably

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  • Electrum Mindat

    A quartz vein from Miller's Locality 3 that has been sawed for analysis. The 1 mm disseminated metallic grains that form crude layers in the Quartz are Electrum. Occasionally the gold occurred separately from the uranium and selenide mineralization.

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  • Invisible Gold from the Hishikari Epithermal Gold Deposit

    electrum and sulfide and sulfosalt minerals fill inter stices between grains of adularia and quartz. The late stage band in the center of the veins consists of euhe dral, vuggy and transparent quartz crystals which are occasionally covered with thin film of very fine grained pyrite and acicular crystals of stibnite (Nagayama, 1993a; Etoh et al., 2002).

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  • The Ag/Au ratio of native gold and electrum and the

    auriferous veins, and (3) the composition of native gold and electrum from gold silver vein deposits ranges 30 70 at % Ag, and is clearly higher than for the auriferous vein

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  • Electrum americancreek

    Electrum The Electrum property has the same base geology as PretivmsBrucejack mine (20km north) and Ascots Premier mine (25km south) with minimal exploration to date. All three deposits are low sulphidationepithermal systems with high grade electrum (a gold / silver alloy) in quartz veins, within the rich Hazelton bedrock formation.

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  • Bladed quartz texture and its relationship to electrum

    The bladed quartz is deposited as a scale on a crack c wall; b) polished hand specimen frrom a steep veein displaying phases of depoosition of masssive quartz annd of platy callcite pseudomo orphosed by qquartz The second type (thhe vein bladed quartz) ccan On O the other hand, h simulaations of boilling fluid be modeeled either ass a higher

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  • COLLOIDAL ORIGIN OF THE COLLOFORM BANDED MACRO

    millimetre wide bands containing bonanza grades of electrum a ) quartz adularia vein containing visible electrum (white) (courtesy of D. Jelev) with many oval voids. Filled hairline joints in the

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  • Formation and Aggregation of Gold (Electrum) Nanoparticles

    The electrum rich bands formed sequentially as coatings of the vein walls by aggregation of gold nanoparticles/colloids. All that glitters in the image is gold ( B ) Photomicrograph (reflected light) of fractal dendrites of electrum within a single band, oriented perpendicular to the vein

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  • Internal vein texture and vein evolution of SpringerLink

    The pre bonanza substage consists of a quartzadulariacarbonate assemblage that is observed within the secondary N4560°W veins, in veinlets that cut the

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  • Vein (geology)

    In geology, a vein is a distinct sheetlike body of crystallized minerals within a rock.Veins form when mineral constituents carried by an aqueous solution within the rock mass are deposited through precipitation.The hydraulic flow involved is usually due to hydrothermal circulation Veins are classically thought of as being the result of growth of crystals on the walls of planar fractures in

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  • Characteristics and Mineralization Age of the Fukusen No

    Electrum in the Fukusen No. 1 vein is associated with quartz + adularia + clay minerals. Pyrite showing acicular shape with small pores within grains is often found in the Fukusen No. 1 vein. Such texture of pyrite has resulted from marcasite inversion.

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  • Center Left Quartz sulfide vein showing native gold in

    Total historical lode gold production from four high grade quartz vein/shear deposits is 9,039 ounces of gold from 11,819 tons of ore, most of which was processed at a

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  • Colloidal origin of colloform banded textures in the

    Jun 16, 2013;;Electrum is highly concentrated in the finest quartzadularia colloform micro bands, which fill joints with widths up to 12 mm. We presume that the joints have filled in with more concentrated colloidal solutions than those in the macro bands, most likely due to extreme boiling of fluids in open or quasi open hydrothermal system.

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  • High Grade Gold Left In Old Mines & Finding Loads Of Vuggy

    Jul 16, 2018;;High grade gold from mineralized samples taken at a couple gold mines on our mineral property and finding loads of vuggy quartz veins all over the claim. Our goal this trip was to

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  • COLLOIDAL ORIGIN OF COLLOFORM BANDED TEXTURES IN

    dense sprinkles of electrum globules on the surfaces of some bands, we infer condensation of gaseous phase separated during the boiling of fluids. Key words colloform banded textures, cracks and pores of syneresis, electrum, adularia, vein quartz INTRODUCTION AND PROBLEM The detailed studies of colloform textures by

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  • CREEDE, COMSTOCK, AND SADO EPITHERMAL VEIN

    present within an ore shoot, within a vein or vein system, or within entire districts. Most Creede type veins are silver rich, and are dominated by pyrite, sphalerite, galena, and chalcopyrite; variabl e amounts of carbonate minerals, quartz, and barite are present. Most Comstock type veins are gold rich, and are dominated by quartz and adularia

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  • Mesothermal gold vein mineralization of the Samdong mine

    The veins are mineralogically simple, consisting of iron and base metal sulfides and electrum, and are associated with weak hydrothermal alteration zones (<0.5

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  • Waihi Epithermal Gold Silver Base Metal GeoScienceWorld

    The Waihi Epithermal Gold Silver Base Metal Sulfide Quartz Vein System, New Zealand Temperature and Salinity Controls on Electrum and Sulfide Deposition

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  • News 2017 Aton Resources Inc.

    Oct 16, 2017;;The vein is hosted mainly by coarse andesitic tuff breccias. Free gold is locally abundant in both the quartz vein and in the phyllic altered wallrock. The gold in the wallrock is always very fine grained, mossy and deep yellow while the gold in the vein quartz can be yellow to white (electrum) and grains can reach 1 2mm.

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  • Internal vein texture and vein evolution of the epithermal

    Two main vein filling stages are identified. stage 1 is a quartzadulariapyritegalenasphaleritechalcopyriteelectrumMn silicatecarbonate assemblage that fills the main EW

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  • Evidence for de sulfidation to form native electrum in the

    Native electrum occurs only within the second phase of mineralization and typically occurs within quartz and adjacent to cross cut first phase S rich veins. In places the electrum appears to replace or form overgrowths around existing sulfide phases.

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  • The Kago low sulfidation gold and silver deposit A

    Vein, breccia veins and host rock samples were prepared as doubly polished thin sections and polished sections. 5.4. Chemical composition of electrum. Electron probe micro analysis (EPMA) was carried out to determine the chemical composition of electrum from high grade quartz vein breccia. Polished sections were measured using a JEOL JX 8800R.

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  • Electrum Mindat

    A quartz vein from Miller's Locality 3 that has been sawed for analysis. The 1 mm disseminated metallic grains that form crude layers in the Quartz are Electrum. Occasionally the gold occurred separately from the uranium and selenide mineralization.

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  • Mineralization of the Northwest Quartz Pyrite Gold Veins

    Nov 01, 2012;;The earliest stage, stage 1, is characterized by sphalerite + chalcopyrite + pyrite ± magnetite veins cutting the host rocks that were altered to chlorite + illite + epidote. Precious metal deposition started in stage 2 as electrum, native gold, and gold silver tellurides deposited with pyrite, quartz, and carbonate.

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  • COLLOIDAL ORIGIN OF THE QUARTZ ADULARIA MILLIMETRE

    form banding, vein adularia, vein quartz, Khan Krum deposit, Bulgaria This study was nancially supported in part by the National Science Fund of Bulgaria (DO 02 82/2008 project).

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  • Electrum Mineral information, data and localities.

    Viking property (Thor vein) M. Minnett, H. Sandeman and D. Wilton (2012) Geochemistry of the host rocks and timing of gold electrum mineralization at the Viking property, Newfoundland. Newfoundland and Labrador Department of Natural Resources Current Research 2012 pp61 84

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  • Geological and Geochemical Characteristics of the

    Mar 17, 2017;;Electrum occurs as discrete grains with size of <190 m in the vein quartz. Small amounts of quartz veinlets with coarsegrained (0.12 mm) specular hematite occur in the late stage, and are cut by translucent quartz veinlets as the late barren stage.

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  • Vein textures and chemistry of ore minerals Chula

    is characterized by quartz carbonate chlorite adularia pyrite veins and breccias intruding volcaniclastic sedimentary to andesitic volcanic breccia. Gold and electrum form as inclusion, fine grained and mainly concentrated in pyrite host, based on quartz textural and petrological analysis.

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  • Using Cambria Quartz With Veins in Your Home The Spruce

    It has a touch of green and gold, that was inspired by seaweed and greys inspired by the sandy seashore. The vein pattern looks like low tide on a mossy beach. The quartz companies have all discontinued most of their greens, so the Galloway is extremely exciting for

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  • Porphyry Gold Deposits, University of Utah

    Abstract. 1 The Kori Kollo deposit is the largest gold deposit in Bolivia (150 metric tons Au; 3rd largest in South America). Hypogene mineralization is hosted in wallrock and a sheeted pyrite polymetallic vein system developed in the apical portion of a porphyritic andesitic dacitic intrusion emplaced within Silurian clastic sedimentary rocks.

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  • GEOLOGICAL BRANCH ASSESSMENT aris.empr.gov.bc.ca

    The Electrum vein occurs at an elevation of 180 m The area experiences high rainfall in the winter months and s heavily forested with western red cedar, test the dip extension of the lower C Zone quartz vein (Figure 6). Hole 87 29 intersected a zone of quartz stringers and

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  • Au Ag Te Ores from Epithermal Quartz Veins of the

    The ore deposit is of representative epithermal Au Ag quartz vein type developed in Miocene andesite. Two Te concentrated veins were investigated in the present

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  • Colloidal and physical transport textures exhibited by

    It is reasonably clear that disequilibrium or far from equilibrium conditions lead to the formation of silica colloids and their deposition in many epithermal deposits. This implies ore forming solutions had elevated concentrations of dissolved silica, well in excess of amorphous silica saturation. We have previously demonstrated that such colloidal silica particles were deposited in

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