Our characteristics of epithermal deposits

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


J.W. Hedenquist, et al., report that epithermal ore deposits form at shallow depth. Lindgren based this conclusion on ore mineralogy and related textures, plus geologic reconstructions .. more recent studies indicate that most epithermal ores form over the temperature range of 150 to less than 300 degrees C, from the surface to as deep as 1 to ...

Characteristics of High Sulphidation Epithermal Gold ...


Characteristics of High Sulphidation Epithermal Gold Deposits of the Mio-Pliocene Age Volcanic Belt, Chile and Argentina Mirasol Resources Ltd.

H - Epithermal


White, N.C. (1991): High Sulfidation Epithermal Gold Deposits: Characteristics and a Model for their Origin; in High-temperature Acid Fluids and Associated Alteration and Mineralization, Geological Survey of Japan, Report No. 277, pages 9-20.

An Overview of Epithermal Gold Deposits | Investing News ...


A few other characteristics distinguish epithermal deposits. Perhaps most notably, they are found at shallow depths, meaning that they are susceptible to erosion and can be easily mined. Gold is ...

Challenges in maximising the value from epithermal gold ...


Characteristics of epithermal gold deposits Epithermal gold deposits are formed at shallow depths of up to 1.5 km below the surface of the earth. The mineralisation is deposited in and along openings in the host rock from ascending magmatic fluids.

Epithermal Gold/Silver Deposits - mingeoch.uni-jena.de


Epithermal Gold/Silver Deposits This text is based mostly on the Economic Geology Notes by Ron Morton and the notes by Jeff Hedenquist. See the references at …

Geochemical characteristics of igneous rocks associated ...


Newly synthesized data indicate that the geochemistry of igneous rocks associated with epithermal mineral deposits varies extensively and continuously from subalkaline basaltic to rhyolitic compositions.

Epithermal Gold Deposits : their characteristics & modeling


A mineral deposit model is a systematically arranged body of information that describes the essential attributes of a mineral deposit type. ¾Empirical (Descriptive) model: where the various attributes are

Characteristics and controls of the largest porphyry ...


Eleven gold‐rich porphyry copper and 14 epithermal gold deposits around the Pacific rim contain > 200 t (‐7 million oz) of gold. These large porphyry‐type deposits conform to a single overall model, whereas the large epithermal gold deposits are varied in both genetic type and mineralisation

Characteristics that distinguish types of epithermal …


Three distinctive groupings of epithermal deposits were recognized from a literature study of fifteen well-described precious- and base-metal epithermal districts, supplemented by L. J. Buchanan's 1981 compilation of data from 47 less completely documented deposits.

Vein Deposits - Earth science


Many epithermal deposits occur in remote regions of under-developed countries, and the construction of infrastructure, such as roads and mills, may be necessary before deposits can be mined. These expenses increase the cost of a mining operation and must be taken into consideration when calculating the economics of a deposit.

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, and ROBERT C. SMITH Geology and Gold Deposits of the Marysville Mining District, Montana By JAMES W. WHIPPLE Gold Deposits of the Boulder County Gold District, Colorado By JAMES A. SAUNDERS Part I is Chapter H U.S. GEOLOGICAL SURVEY …

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


Lithotectonic, mineralogical, and geochemical data on two silver- and base metal-bearing deposits from Peru and two from Mexico are compiled to facilitate comparisons with other epithermal deposits. Silver and base metal-bearing deposits of Mexico and Peru constitute an important portion of the

CHARACTERISTICS OF HIGH-SULFIDATION EPITHERMAL DEPOSITS ...


In Magmas, Fluids, and Ore Deposits, Ed.: J.FM. Thompson, Mineralogical Association of Canada Short Course Vol. 23 (1995) Chapter 19 CHARACTERISTICS OF HIGH-SULFIDATION EPITHERMAL

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

Epithermal deposits: geological characteristics and ...


Epithermal deposits: geological characteristics and genetic processes for exploration and discovery One day short course, Sunday 17 November Presenter

GOLD IN 2000 - Society of Economic Geologists


Characteristics and Models for Carlin-Type Gold Deposits A.H. Hofstra and J.S. Cline Characteristics and Genesis of Epithermal Gold Deposits D.R. Cooke and S.F. Simmons Exploration for Epithermal Gold Deposits J.W. Hedenquist, A. Arribas R., and E. Gonzalez-Urien

Characteristics of Epithermal High Sulfidation 2 ...


Characteristics of Epithermal High Sulfidation 2 - Download as PDF File (.pdf), Text File (.txt) or read online. The Cijulang prospect is part of Papandayan Project for gold exploration concession operated by …

Porphyry copper deposit - Wikipedia


Characteristics of porphyry copper deposits include: The orebodies are associated with multiple intrusions and dikes of diorite to quartz monzonite composition with porphyritic textures. Breccia zones with angular or locally rounded fragments are commonly associated with the intrusives.

Characteristics and Genesis of Epithermal Gold Deposits ...


This paper summarizes the characteristics of epithermal gold deposits and discusses potential ore deposition mechanisms. Epithermal deposits mostly form at …

EPITHERMAL GOLD DEPOSITS: STYLES, CHARACTERISTICS AND ...


3 Ore and Gangue The mineralogy of ores shows considerable overlap, but there are several pronounced differences, based on a compilationof mineral data for more than 130 epithermal deposits (White ...

Epithermal Gold Deposits Characteristics


The word epithermal comes from the Greek words for "nearby heat" referring to the fact that epithermal deposits form very close to the surface of the crust, by definition, within a thousand meters.

Epithermal gold deposits. Styles, characteristics and ...


Generalized sketches showing the relation of fluid types to alteration zoning in the two styles of epithermal deposits. (a) In low-sulfidation systems, the fluid at 1-2 km depth is near-neutral pH ...

Characteristics and controls of the largest porphyry ...


Australian Journal of Earth Sciences (1997) 44, 373-388 Characteristics and controls of the largest porphyry copper-gold and epithermal gold deposits in the

Metallogeny of the Gold Quadrilateral: style and ...


epithermal suites is more expressive, i.e. depending of sulfide amount, redox potential of fluids and igneous rocks petrochemistry, whether gold-silver epithermal deposits are related or not to a porphyry subvolcanic environment.

GEOLOGY AND GEOcHEMISTRY OF EPITHERMAL SYSTEMS


GEOLOGY AND GEOcHEMISTRY OF EPITHERMAL SYSTEMS CONTENTS The Geothermal Framework for Epithermal Deposits R.W. Henley A Practical Guide to the Thermodynamics of Geothermal R.W. Henley and K.L. Brown Fluids Hydrothermal Ore Deposits The Behavior of Silica in Hydrothermal Solutions R.O. Fournier Carbonate Transport and Deposition in the Epithermal …

Hydrothermal mineral deposit - Wikipedia


Hydrothermal epithermal deposits consist of geological veins or groups of closely spaced geological veins. Finally, Mississippi Valley-type (MVT) are hosted in limestone or dolostone that was deposited in a shallow marine environment in a tectonically stable intraplate environment.

Miocene and Early Pliocene Epithermal Gold-Silver Deposits ...


The contrasting types and characteristics of epithermal deposits and their affinities with as- sociated igneous rocks suggest that a genetic relationship is present between these Au-Ag deposits and their

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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