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    • Ore genesis

      Lode gold deposits are usually hosted in basalt or in sediments known as turbidite, although when in faults, they may occupy intrusive igneous rocks such as granite. Lode gold deposits are intimately associated with orogeny and other plate collision events within geologic history. It is thought that most lode gold deposits are sourced from

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    • Geochemistry of hydrothermal gold deposits A review

      Geochemistry of hydrothermal gold deposits A review. Author links open and halogen elements in fluids included in the hydrothermal minerals related to gold mineralization have Y.B. Wang, F. Pirajno, J.L. Liu, Z.D. ZhaoGeochemistry and geochronology of the volcanic rocks associated with the Dongan adulariasericite

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    • Wisconsin Geological amp; Natural History Survey 187; Minerals

      Formula (Ce,Ca,Ce,La,Nd,Y)2(Al,Fe)3(Si2O7)(SiO4)O(OH) Monoclinic Description Allanite refers to a group of minerals found as an accessory in a number of different rocks such as syenite, granite and gneiss. It may also be a component of granite pegmatite. It is often associated with

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    • Sericitic and Advanced Argillic Mineral Assemblages and

      associated with sericitic alteration. Most of the advanced argillic assemblages at Resolution formed at relatively low temperatures, stable with kaolinite and dickite. Resolution contains fairly high levels of fluorine. The most important fluorine bearing minerals are biotite (~3 4 wt% F), topaz (~11 12 wt% F), fluorite (~49 wt% F), and

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

      The tellurides, which are usually associated with pyrite, are widely distributed, though not so abundant, but not always recognized; indeed by some miners they are mistaken for sulfides. For more information see minerals associated with gold ores. General Types of Gold Ores Gold deposits are often classified according to their association.

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    • Minerals Free Full Text Formation and Aggregation of

      The LS ores have electrum 177; gold as principal ore minerals, along with associated silver sulfides, selenides, tellurides, and sulfosalts, which generally occur with such gangue minerals as quartz, opal, adularia, and calcite (examples Sleeper, Round Mountain, Midas, Nevada); (2) High sulfidation or acid sulfate ores that form from

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    • Intrusion related gold deposits associated with tungsten

      An under recognized and economically important class of intrusion related gold deposits, which occur within magmatic provinces best known for tungsten and/or tin mineralization, is described with reference to seven major deposits (Fort Knox, Mokrsko, Salave, Vasilkovskoe, Timbarra, Kidston and Kori Kollo). These gold deposits contain a metal suite that includes some combination of bismuth

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    • Ore deposit geology Britannica

      The important vanadium minerals are patronite (VS 4), carnotite [K 2 (UO 2) 2 (VO 4) 2], and vanadinite, [Pb 5 (VO 4) 3 Cl]. Ore deposits mined solely for vanadium are rare because much of the vanadium in igneous rocks occurs in the relatively insoluble trivalent state, substituting for ferric iron in ferromagnesium silicates, magnetite (an

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    • Geophysical exploration for gold and associated minerals

      Geophysical exploration for gold and associated minerals, case study Wadi El Beida area, South Eastern Desert, Egypt (IP) and dipoledipole techniques were applied to outline the area of alteration that is associated with the gold and associated mineral deposits in the study area. While the presence of the gold cannot be detected

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

      The tellurides, which are usually associated with pyrite, are widely distributed, though not so abundant, but not always recognized; indeed by some miners they are mistaken for sulfides. For more information see minerals associated with gold ores. General Types of Gold Ores Gold deposits are often classified according to their association.

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    • Minerals Free Full Text Formation and Aggregation of

      The LS ores have electrum 177; gold as principal ore minerals, along with associated silver sulfides, selenides, tellurides, and sulfosalts, which generally occur with such gangue minerals as quartz, opal, adularia, and calcite (examples Sleeper, Round Mountain, Midas, Nevada); (2) High sulfidation or acid sulfate ores that form from

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    • Selenium in Some Epithermal Deposits of Antimony, Mercury

      SELENIUM IN SOME EPITHERMAL DEPOSITS OF ANTIMONY, MERCURY, AND SILVER AND GOLD By D. F. DAVIDSON ABSTRACT The presence of selenium in some epithermal ores of silver, gold, and mercury has long been known. Recent work indicates that epithermal silver and antimony deposits are commonly highly seleniferous, and that gold and mercury deposits are

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    • Ore deposit geology Britannica

      The important vanadium minerals are patronite (VS 4), carnotite [K 2 (UO 2) 2 (VO 4) 2], and vanadinite, [Pb 5 (VO 4) 3 Cl]. Ore deposits mined solely for vanadium are rare because much of the vanadium in igneous rocks occurs in the relatively insoluble trivalent state, substituting for ferric iron in ferromagnesium silicates, magnetite (an

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    • Indicator and Pathfinder Minerals in Gold Exploration

      Indicator and pathfinder minerals help explorers narrow down the search area for many different types of ore deposits, including gold. Indicator and Pathfinder Minerals in Gold Exploration.

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    • Intrusion related gold deposits associated with tungsten

      An under recognized and economically important class of intrusion related gold deposits, which occur within magmatic provinces best known for tungsten and/or tin mineralization, is described with reference to seven major deposits (Fort Knox, Mokrsko, Salave, Vasilkovskoe, Timbarra, Kidston and Kori Kollo). These gold deposits contain a metal suite that includes some combination of bismuth

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    • Minerals Associated or Found in Gold Placer Gold

      Associated Minerals Placer gold invariably is accompanied by other heavy minerals, which comprise the black, white, or yellow concentrates found in the sluice box when cleaning up.Table 3 lists these minerals roughly in the order of their commonness. Some of the characteristics noted under Remarks apply chiefly to the minerals as they are found in sluice box concentrates.

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    • Geophysical exploration for gold and associated minerals

      Geophysical exploration for gold and associated minerals, case study Wadi El Beida area, South Eastern Desert, Egypt (IP) and dipoledipole techniques were applied to outline the area of alteration that is associated with the gold and associated mineral deposits in the study area. While the presence of the gold cannot be detected

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    • Minerals Special Issues

      Minerals, an international, peer reviewed Open Access journal. Articles Advances in Application of Spectroscopic Techniques for Minerals Processing

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    • Intrusion Related Gold Deposits

      associated granite suites may elsewhere be associated with Sn W and W Mo Bi (Sn) mineralisation. Trace elements in alteration associated with fractionated granites can include F, B, Cs, Rb, and Li. Yttrium , Th and REE bearing minerals such as xenotime can be present in associated greisens and veins. Surficial geochemical criteria

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    • Ore Deposit Geology by John Ridley

      Chemical controls on solubility of ore forming minerals in hydrothermal solutions. Canadian Mineralogist 23, 333352. Cronan, D. S. Alteration and primary geochemical dispersion associated with the Bulletin lode gold deposit, Wiluna, Western Australia. Journal of Geochemical The Archean lode gold deposits at Wiluna, Western

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    • Mineral Classics Gold and Associated Minerals from Colorado

      Gold and Associated Minerals from Colorado. A great selection of historic, classic and contemporary Gold and Gold bearing minerals from all over the Colorado Mineral Belt, as far north as Boulder, and down into the San Juans

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    • Hydrothermal alteration styles in ancient and modern

      Hydrothermal alteration styles in ancient and modern orogenic gold deposits, New Zealand D. CRAW P. UPTON* D. J. MACKENZIE Geology Department University of Otago the associated alteration characteristics are less Structural relationships of alteration minerals and gold bearing vein swarms were determined in artificial exposures (mine

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    • Gold in Minerals and the Composition of Native Gold

      GOLD IN MINERALS AND THE COMPOSITION OF NATIVE GOLD By ROBERT S. JONES and MICHAEL FLEISCHER ABSTRACT Gold occurs in nature mainly as the metal and as various alloys. It forms complete series of solid solu173; tions with silver, copper, nickel, palladium, and

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    • Volcanogenic massive sulfide ore deposit

      Volcanogenic massive sulfide ore deposits, also known as VMS ore deposits, are a type of metal sulfide ore deposit, mainly copper zinc which are associated with and created by volcanic associated hydrothermal events in submarine environments These deposits are also sometimes called volcanic hosted massive sulfide (VHMS) deposits. The density generally is 4500 kg/m 3.

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    • Geology of Gold Mineralization amp; How Gold Deposits are Formed

      GeologyFormationOriginSignificanceContentResearchResourcesGold is relatively scarce in the earth, but it occurs160;in many160;different kinds160;of rocks and in many different geological environments. Though scarce, gold is concentrated by geologic processes to form commercial deposits of two principal types lode (primary) deposits and placer (secondary) deposits. Lode deposits are the targets for the hardrock prospector seeking gold at the site of its deposition from mineralizing solutions. Geologists have prSee more on prospectorsparadiseLive Chat
    • Volcanic Minerals Oregon State University

      Another 5.4 million ounces of gold remains in the deposits. The gold is found in altered rocks in all parts of the stratigraphic sequence. Diagram from ITAM Gold by the Minerals Council of Australia. Gold in Porphyry Deposits . Gold and copper are found in ore bodies associated with porphry.

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    • List Minerals Associated with Gold

      To know what type of rock is gold associated with you must see that the minerals most common in placer deposits are platinum, iridosmine, magnetite, iron pyrites, ilmenite, zircon, garnets, rutile and barytes; wolfram, scheelite, brookite and diamonds are less common. Diamonds are associated with gold in Brazil, and also occasionally in the Urals and in the United States. In auriferous quartz

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    • EPITHERMAL GOLD DEPOSITS STYLES, CHARACTERISTICS

      Published in SEG Newsletter, 1995, No. 23, pp. 1, 9 13 EPITHERMAL GOLD DEPOSITS STYLES, CHARACTERISTICS AND EXPLORATION Noel C. White1 and Jeffrey W.

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    • Gold Mineral information, data and localities.

      Gold mineral data, information about Gold, its properties and worldwide locations.

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    • Remote sensing for mineral exploration ScienceDirect

      1. Introduction. Remote sensing is the science of acquiring, processing, and interpreting images and related data, acquired from aircraft and satellites, that record the interaction between matter and electromagnetic energy (Sabins, 1997, p. 1).This report reviews the use of remote sensing for mineral exploration.

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    • (PDF) Mineral spectra associated with gold deposits

      Mineral spectra associated with gold deposits. compilation of the different alteration types associated with gold deposits. spectra of minerals are provided as references.

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    • Critical Elements in Alkaline Igneous Rock Related

      Alkaline igneous rock related gold deposits, primarily of Mesozoic to Neogene age, are among the largest epithermal gold deposits in the world. These deposits are a subset of low sulfidation epithermal deposits and are spatially and genetically linked to small stocks or clusters of intrusions possessing high alkali element contents.

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    • Gold The mineral native Gold information and pictures

      Gold is one of the heaviest minerals. Gold is usually associated with Pyrite and other sulfides, An odd occurrence from a country with few known mineral deposits is the Porgera Mine, Enga Province, Papua New Guinea. The Pacific Island of Fiji is also known for its production of Gold in the Emperor Mine, Viti Levu.

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    • Structures of Mineral Deposits Geology In

      Gangue mineral association e.g. gold associated with quartz ankerite veins. f. Trace metal association e.g. gold associated with arsenic and mercury in trace amounts. g. Structural controls e.g. laterite deposits associated with unconformities, replacement deposits associated with crests of anticlines. h.

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    • Wyoming State Geological Survey

      Gold in Wyoming. Gold, the intrinsically valuable quot;royal metal,quot; derives its value from the combination of its rarity and beauty along with its softness (2.5 to 3 on the mohs hardness scale), malleability, ductility, ease of alloying with other metals such as copper and silver, and

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    • CobaltStyles of Deposits and the Search for Primary

      sedimentary rock hosted deposits in back arc and rift environments associated with mafic ultramafic rocks. Metasedimentary cobalt copper gold deposits (such as Blackbird, Idaho), iron oxide copper gold deposits, and the five element vein deposits (such as Cobalt,

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