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A review of intermediate sulfidation epithermal deposits ...

Epithermal deposits are responsible for 8% gold (Frimmel, 2008), ... but also includes a range of characteristics that are typical, but not necessarily exclusive, to one type of deposit. Sulfidation state of sulfide minerals is a function of fs 2 and temperature (1000/T, ...

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Exploration of Low Sulfidation Epithermal Vein Systems

Exploration of Low Sulfidation Epithermal Vein Systems L ow Sulfidation Epithermal Vein Deposits ("LSEVD") share many common characteristics whose recognition and interpretation allow explorationists to determine the magnitude of a given system and general location within the system, and thereby focus exploration. A brief

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Epithermal deposits: geological characteristics and ...

Epithermal deposits: geological characteristics and genetic processes for exploration and discovery One day short course, Sunday 17 November Presenter Stuart Simmons at [email protected] Short course description Epithermal deposits are diverse and .

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Epithermal Deposits of Turkey | SpringerLink

Jan 22, 2019 · Epithermal deposits are high-grade deposits dominated by open-space textures generally formed at depths of ~2 km with temperatures of < 400 °C. Due to their shallow-depth location, it is regarded that they represent easily mineable source of gold.

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Lithocaps – characteristics, origins and significance for ...

Fine grained clay minerals are epithermal gold-silver deposits of the Andes and their abundant, and textural destruction is common. Short-wave controls on mineralizing processes: Ore Geology Reviews 65: infra-red (SWIR) spectroscopy is an essential tool to aid in 327–364.

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Characteristics of some silver-, and base metal-bearing ...

Introduction. Although these deposits are generally similar to epithermal deposits of Nevada and Colorado in the western United States, they have some important differences. Because of this, data on the geological attributes of these deposits are very useful for developing models of ore formation that can be used in mineral exploration.

An Overview of Epithermal Gold Deposits - Nasdaq

Mar 23, 2011 · Shutterstock photo. Epithermal gold deposits are a type of lode deposit that contain economic concentrations of gold, silver and in some cases base metals including copper, lead and zinc . Gold is the principal commodity of epithermal deposits, .

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A Prospector's Guide to Alteration and Epithermal Gold ...

General Characteristics of Epithermal Related Mineralization Epithermal systems are predominantly "near surface" (<2 km depth) features that can be associated with the development of gold, silver and base metal mineralization.

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Geological Characteristics of Epithermal Precious and Base ...

Epithermal deposits are important sources of gold and silver that form at <1.5-km depth and <300°C in high-temperature, mainly subaerial hydrothermal systems. Such hydrothermal systems commonly develop in association with calc-alkaline to alkaline magmatism, in volcanic arcs at convergent plate margins, as well as in intra-arc, back-arc, and postcollisional rift settings.

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Low Sulphidation Epithermal Gold Deposits

You may hear the word telescope used in epithermal deposits. This means that the boiling zone moved during the life of the system, spreading the boiling zone over a greater vertical extent. Here are some better- known low sulfidation epithermals that you may have heard of.

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Epithermal gold deposits: Styles, characteristics, and ...

The Utanobori gold deposit is a low‐sulfidation, epithermal vein‐type deposit located in northern Hokkaido, Japan. The deposit is hosted by conglomerate, sandstone, and tuff of the Middle to ...

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Epithermal Gold Deposits - Styles, Characteristics, and ...

These examples represent the range in depth that epithermal deposits form, from just below the surface to more than 1 km depth. The two deposit styles form from fluids of distinctly different chemical composition in contrasting volcanic environments.

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Chemical, isotopic and mineralogical characteristics of ...

Chemical, isotopic and mineralogical characteristics of volcanogenic epithermal fluorite deposits on the Permo-Mesozoic foreland of the Andean volcanic arc in Patagonia (Argentina) Author links open overlay panel Harald G. Dill a Liliana I. Luna b Nicole Nolte c Bent T. Hansen d

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Epithermal Gold Deposits : their characteristics & modeling

• The term 'Epithermal' defined by Lindgren (1922, 1933) includes a broad range of precious metals (+ tellurides or selunides), base metals, Hg and Sb deposits, formed by aqueous fluids charged with igneous emanations at low T (< 200°C) and moderate pressure • Now it .

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Epithermal Deposits of Turkey | SpringerLink

Jan 22, 2019 · In the chapter the brief summary of selected epithermal deposits is emphasized the principal characteristics of important epithermal mineralisation all over Turkey including low, intermediate and high sulphidation types without taken into account their major economic element content on the base of reports from government and private companies ...

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Characteristics and Genesis of Epithermal Gold Deposits ...

Low- and high-sulfidation and hot spring epithermal gold deposits are dealt with as one genetic gold class. Alkalic epithermal and porphyry gold deposits are dealt with as a separate gold deposit class owing to their specific host-rock association and element enrichment (e.g., Mo, F, Be, Hg, W, and Sn).

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Epithermal deposits: geological characteristics and ...

Epithermal deposits are diverse and attractive exploration targets for precious metals because they can contain high metal grades and large resources, and they can overlie deep porphyry mineralization. This course focuses on the geological characteristics of epithermal deposits,

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Epithermal Gold Deposits Part 1! - USGS

Epithermal Gold Deposits Part II Geology and Gold Deposits of the Oatman District, Northwestern Arizona By Ed DeWitt, Jon P. Thorson,1 and Robert C. Smith2 Abstract Mines in the Oatman mineralized district, near Oatman in northwestern Arizona, have produced more than 1.98 million ounces of gold from mid-Tertiary, epithermal, silver-

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Characteristics of high-sulfidation epithermal deposits ...

Main geological characteristics of 14 selected high-sulfidation epithermal deposits Time Deposit/district, Age Metals, Local volcanic Principal host Genetically between host location (Ma) (tonnes)1 setting rocks related rocks rock & deposit Deposit form Motomboto, 1.9 Cu, Au, Ag Central-vent Dae dome, ands/dac/rhy Dioritic, qtz- <1.0 m.y. Hbx, veins, dis in Indonesia 60,000 t Cu. 4 i volcano flows, pyr and .

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Chapter 7 Exploration for Epithermal Gold Deposits

Lindgren (1922)first defined the epithermal environment as being shallow in depth, typi- cally hosting deposits of Au, Ag, and base metals (Table 1). Epithermal systems have also been exploited for a wide range of metals and minerals, including Hg, Sb, S, kaolinite, alunite, and silica.

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