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Wednesday, November 11, 2020 | History

2 edition of Disseminated/replacement gold deposits / E.A. Elevatorski. found in the catalog.

Disseminated/replacement gold deposits / E.A. Elevatorski.

Edward A. Elevatorski

Disseminated/replacement gold deposits / E.A. Elevatorski.

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  • 15 Currently reading

Published by Minobras in Dana Point, CA .
Written in English

    Subjects:
  • Gold ores.

  • Classifications
    LC ClassificationsTN420 .E41 1981
    The Physical Object
    Paginationiii, 114 p.
    Number of Pages114
    ID Numbers
    Open LibraryOL21621121M
    LC Control Number81-80059

    Mining activity was relatively small scale until the War of the Pacific when Chile annexed large areas of both Peru and Bolivia north of its old border, which included Chuquicamata. There was then a great influx of miners into the area drawn in by 'Red Gold Fever' (La Fiebre del Oro Rojo) [8] and soon Chuquicamata was covered with mines and Country: Chile.


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Disseminated/replacement gold deposits / E.A. Elevatorski. by Edward A. Elevatorski Download PDF EPUB FB2

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

M ost exploration geologists and researchers recognize a class of mineral deposits hosted by porphyritic-textured igneous rocks and characterized by stockwork styles, which form in large part from fluids released by cooling magmas. These so-called “porphyry deposits” are responsible for a significant fraction of the world's Cu and Mo resources and contain modest to significant amounts of.

Distal disseminated deposits associated with reduced intrusion-related systems Bald Mountain, Nevada Hitchborn et al. (), Nutt et al. () Nutt and Hofstra () True North, Alaska and Brewery Creek, Yukon Thompson and Newberry () Flanigan et al.

(), Poulsen () Epizonal and disseminated orogenic deposits. Epigenetic gold deposits in metamorphic terranes include those of the Precambrian shields (app, t Au), particularly the Late Archean greenstone belts and Paleoproterozoic fold belts, and of the late Neoproterozoic and younger Cordilleran-style orogens (app t lode t placer Au), mainly along the margins of Gondwana, Laurentia, and the more recent circum-Pacific.

A number of gold deposits including Au-VMS and the intrusion-related Doyon mine and Côté Gold deposit are not from the Timmins area but are added to cover a broader spectrum of gold metallogenic events in the southern Abitibi and the Swayze area (Côté Gold).

Data for Côté Gold from Kontak et al. () and Katz et al. chemistry of the Carlin deposit, the largest dissemi- nated replacement gold deposit in carbonate rocks discovered to date in the western United States.

The deposit Disseminated/replacement gold deposits / E.A. Elevatorski. book in secs. 13 T. 35 N., R. 50 E., in the Tuscarora Mountains in northern Eureka County, Nevada (Fig.

Sincethe Carlin. The Dian-Qian-Gui “Golden Triangle” area is located at the junction of Yunnan, Guizhou, and Guangxi provinces in southwest China ().It contains one of the largest concentrations of Carlin-type gold deposits, which are currently being sought and mined in the United States and China, in the world (Cline et al., ; Su et al., ).Gold deposits in the northern Dian-Qian-Gui area are.

Hydrothermal Alteration Mineralogy and Geochemistry of the Archean World-Class Canadian Malartic Disseminated-Stockwork Gold Deposit, Southern Abitibi Greenstone Belt, Quebec, Canada. Economic Geology, Vol.Issue. 6, p. Author: John Ridley. Epigenetic gold deposits in metamorphic terranes include those of the Precambrian shields (app–25, t Au), particularly the Late Archean greenstone belts and Paleoproterozoic fold belts, and of the late Neoproterozoic and younger Cordilleran-style orogens (app t lode t placer Au), mainly along the margins of Gondwana, Laurentia, and the more recent circum Cited by: 1.

Introduction. Sediment-hosted disseminated gold deposits also known as Carlin-type gold deposits, are largely replacement bodies with visually subtle alteration dominated by decarbonatization of silty carbonate host rocks (Arehart, ; Cline et al., ).The occurrence of gold in Carlin-type deposits is irregular and has been the source of much debate over the last 50 years (Bowell et al Cited by: 2.

Models and Exploration Methods for Major Gold Deposit Types. Robert, F. [1] disseminated deposits, which occur peripheral to a causative replacement associated with compressional or.

References & Additional Information: Selected References: Bullis H R, Hureau R A, Penner B D - Distribution of Gold and Sulfides at Lupin, Northwest Territories: in Econ. Geol. v 89 pp ; Elevatorski E A - World Gold, Mines-Deposits-Discoveries (Extract): in Minobras Mining Services pp ; Lhotka P G, Nesbitt B E - Geology of un-mineralised and gold-bearing iron.

The assemblage of alteration minerals, disseminated distribution of sulfide minerals, and gold fineness show typical characteristics of orogenic gold deposits (Groves et al.,Groves et al.,Morrison et al., ) formed under upper greenschist to lower-amphibolite facies conditions (Eilu et al., ).Author: Ernowo Ernowo, Ernowo Ernowo, Franz Michael Meyer, Arifudin Idrus.

Geology of the Wharekirauponga Epitheimal Gold Deposit, Coromandel Region In book: Mineral deposits of New Zealand, Edition: 2, Publisher: Australasian Institute of Mining and Metallurgy, pp. Additional Physical Format: Online version: Elevatorski, Edward A.

Gold deposits guidebook. Dana Point, Calif.: Minobras,© (OCoLC) 1. Introduction. The Jiaodong gold deposits are currently the most important gold resources (with Au reserves of > t) in China (Yang et al., a), the leading gold-producing country globally (with Au production of ∼ t indata from the China Gold Association website).Jiaodong is also considered as perhaps the only world-class to giant gold accumulation on the planet where Cited by: North- east and east-west faults are the major structural control at the deposit, but a regional east-west fold system also exists.

Rhyolite flows and andesite dikes are found to the northeast and southwest, respectively. Details of the gold deposit at Thallium in the Carlin-type gold deposits Jerritt Can,'on can be found in HAWKL~S ().Cited by: The halogen data of fluid inclusions from Awak Mas and Salu Bullo are comparable to other gold deposits formed by fluid-mixing between deeply sourced fluids with some contribution of shallow water (meteoric water), i.e.

gold deposits in the Variscan belt of western Europe (Boiron et al., ) and epizonal orogenic gold deposits in Western Cited by: 2.

Abstract. The static price of gold coupled with increased costs for underground mining in the post-World War II era in the United States led companies such as the Newmont Mining Company to seek precious-metal properties amenable to low-cost mining (Ramsey, ).Cited by: Generally, these deposits contain massive and disseminated iron oxides (magnetite and/or hematite) that are partially or completely replaced by sul fi des, i.e., pyrite and chalcopyrite.

Physicochemical conditions of formation of epithermal gold-mercury deposits Article (PDF Available) in Geologiya i Geofizika 43(12) December with 75 Reads How we measure 'reads'. Paragenesis of Orogenic Mineralisation in the Reefton Gold field, West Coast Region November In book: Mineral Deposits of New Zealand Exploration and Research Monograph 31 (pp - ).

deposits in Arizona, history and production, types of deposits, grade specifications and marketing conditions. Total production of Arizona fluorspar from is estimated at 33, tons valued at $This report is possible through the efforts of Mr.

Elevatorski. The wording, geology, interpretation and analyses are Size: 1MB. focus on gold mining, reinforces the fact that there is a wide diversity in gold deposit types. There is a need to summarize such information and, more importantly, to attempt to synthesize it into a coherent classifica-tion of gold deposits.

The purpose of this paper therefore is to present aFile Size: KB. Abstract. The static price of gold coupled with incresed costs for underground mining in the post-Wold War II era in the United States led companies such as the Newmont Mining Company to seek precious-metal properties amenable to low-cost mining (Ramsey, ).Cited by: Elevation: 6, Feet (1, Meters) Primary Mineral: Gold Lat, Long: Elevation: 3, Feet ( Meters) Primary Mineral: Silver, Molybdenum, Copper Lat, Long:Comment: MINING METHOD IS OPEN PIT.

Comment Type: Geology: Comment: GOLD TO SILVER RATIO IS Comment Type: Production: Comment: INITIAL PRODUCTION BY PAN CANA INDUSTRIES FROM HEAP LEACH OPERATION IN PROD. AU PROD.=OZ. CIL MILL COMMISSIONED AUG. gold to silver ratio is ore is also controlled by fracturing-brecciation.

general size of ore body is very large. best mineralization occurs at intersection of high. Descriptive models for epithermal gold-silver deposits: Chapter Q in. Epithermal gold-silver deposits are vein, stockwork, disseminated, and replacement deposits that are mined primarily for their gold and silver contents; some deposits also contain substantial resources of lead, zinc, copper, and (or) mercury.

These deposits form in the. Elevation: 6, Feet (2, Meters) Primary Mineral: Silver, Gold Lat, Long: comment type: economic factors: comment: presently mining operations are proceeding at the carlin, blue star, and maggie creek open pits, processing operations entail a low grade heap leach operation near the maggie creek pit and a cyanide agitation leach circuit near the carlin pit.

the bootstrap pit is presently depleated of ore and thus inactive. plans are underway to bring the gold quarry. Year Published: Descriptive models for epithermal gold-silver deposits: Chapter Q in. Epithermal gold-silver deposits are vein, stockwork, disseminated, and replacement deposits that are mined primarily for their gold and silver contents; some deposits also contain substantial resources of lead, zinc, copper, and (or) mercury.

The gold generally occurs within pyrrhotite micro-fractures, with occasional isolated specks in quartz. Sulphide replacement mineralization consists of 2 to 15% fine-grained disseminated pyrrhotite, trace to 2% arsenopyrite, trace to 2% pyrite, and trace gold and chalcopyrite occurring in.

Origin: This manganese deposits formed by weathering of basement rocks rich in manganese as a source of the ore which deposited in fissures and cracks with some replacement along fracture walls (El Shazly,).

The ore is a very low-temperature epithermal fissure deposit of black calcite type that occurs near the surface (oxidation zone) in. Jansen L J - Stratigraphy and structure of the Mission Copper deposit, Pima mining district, Pima County, Arizona: in Titley S R Advances in Geology of the Porphyry Copper Deposits, Southwestern North America University of Arizona Press, Tucson pp Epithermal gold-silver deposits are vein, stockwork, disseminated, and replacement deposits that are mined primarily for their gold and silver contents; some deposits also contain substantial resources of lead, zinc, copper, and (or) mercury.

These deposits form in the uppermost parts of the crust, at depths less than about 1, meters below. The Rise of the Gold Standard, 56 February 24 ‘An Act for taking off the Obligation and Incouragement for Coining Guineas for a certaine time therein mentioned’.

The act is reproduced below in its entirety. ——— Whereas by an Act made in the Eighteenth Yeare of. m oz of gold have been produced, sincefrom late Archaean ( Ma) greenstone belts of the Central Plateau, Tanzania.

North and east of Nzega (4/sup 0/12'S, 3/sup 0/11'E), 18% of the exposed basement, mainly Dodoman schists and granites, consists of metavolcanics and metasediments of the Nyanzian and Kavirondian Series.

Ownership in Falcon Gold Zimbabwe Ltd per cent Prior to Falcon Gold commencing open-pit mining inthis mine had accumulated production of kg of gold, grading at 6 g/t. The area is characterised by a rhyolite of the Upper Bulawayan Group with some small quartz veins striking south and southwest.

A novel model of intrusion related gold systems 3 Studia UBB Geologia,63 (1), 1 – 12 Fig. 1. Conceptual Model-Cross Section through the most important gold bearing geothermal- intrusive related type deposits,Author: Eugen Orlandea, Ferdomin SpA, Copiapo, Atacama, Chile, Şerban-Nicolae Vlad.Subject category Comment text; Deposit: Ore Bodies At Santa Rita Are A Complex Of Typical Porphyry Type Veins And Disseminated Ores That Have Been Secondarily Enriched, And Limestone Replacement Deposits Exhibiting Little Or No Enrichment, In And Around The Pervasively Altered And Intensely Shattered Santa Rita Stock.A.

Abrecht, J.,Stability relations in the system CaSiO3-CaMnSi2O6-CaFeSi2O6: Contributions to Mineralogy and Petrology, v. 74, p.