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Gold Deposits and Their Geological Classification

2016-11-20 · deposit types. The development of a simple classification scheme for gold deposits, as presented here, has been approached with a full appreciation that there are many difficulties associated with classification of ore deposits in general. In the case of lode gold deposits, contrasting classifications

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Major Gold Deposit Types and Exploration process

2020-5-29 · Major Gold Deposit Types and Exploration process N. N. Singh Indo Gold Mines Private Ltd, 68B Sect-9, HM; Udaipur, India 313001 [email protected] Gold occurs as primary commodity in a wide range of gold deposit types and settings. Three main clans of deposits are now broadly defined, each including a range of specific deposit types with common

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Mineral Types of Gold Deposits and Regularities of Their ...

2019-5-16 · The gold-bearing deposits of southeastern East Sayan have been categorized according to mineral composition. The most important classification criterion is the composition of productive ore mineral assemblages specific to each of the distinguished types, whereas the use of other criteria results in the inevitable overlap of different structural, compositional, or genetic features of deposits ...

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Gold Deposits - an overview | ScienceDirect Topics

Eoin H. Macdonald, in Handbook of Gold Exploration and Evaluation, 2007 2.4.3 Intrusion-related deposits. Most intrusion-related gold deposits are generated above zones of active subduction at convergent plate margins. The margins range from primitive, through mature island arcs to continental margins. Sillitoe (1993) lists a number of important types: gold-rich copper and gold-only porphyry ...

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GEOLOGY OF SEDIMENTARY ROCK-HOSTED GOLD

2001-3-16 · type of ore-controlling structure or host of sedimentary rock-hosted gold deposits in P.R. China. These breccia bodies are conformable with stratigraphic units in the host rock. An example of this is the Shuangwang gold deposit (Fan, S.C. and Jin, Q.H., 1994), which is a large Carlin-type gold deposit in the Qinling area,

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Gold Deposits in the Earth’s History - Geology of Ore

2020-2-5 · The generally accepted approach at present is the subdivision of gold deposits into the following economically significant types: orogenic, epithermal, intrusion-related (related mostly to granitoid intrusions), paleoplacers, gold-bearing porphyry, gold-bearing VMS, and iron oxide copper gold (IOCG) ore deposits (Kerrich et al., 2000; Safonov, 2003; Frimmel et al., 2005; Groves et al., 2005 ...

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9 Ore Deposits and Economic Minerals – Mineralogy

9.3 Types of Ore Deposits 9.3.1 Magmatic Ore Deposits 9.75 Gold-bearing quartz vein at the Nalunaq Gold Mine in Southern Greenland. Meter stick for scale. Minerals containing elements of economic value are generally present in all igneous rocks, but the elements may not be concentrated enough to make mining economical.

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Orogenic gold deposits: A proposed classification in the ...

1998-4-1 · Most deposit types that contain ore-grade gold , whether with gold as the principal metal or together with copper, are sited along convergent plate margins (Sawkins, 1990). There are notable exceptions, such as gold-rich volcanogenic massive sulfide deposits developed along spreading ocean ridges (e.g. Bousquet) and other deposit styles ...

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(PDF) Epithermal gold deposits. Styles, characteristics ...

1995-9-30 · Figure 1. Generalized sketches showing the relation of fluid types to alteration zoning in the two styles of epithermal deposits. (a) In low-sulfidation

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Gold Deposits - EOLSS

2020-8-18 · 1. orogenic gold deposits 2. Carlin-type gold deposits 3. epithermal deposits 4. porphyry copper-gold deposits 5. iron oxide copper-gold deposits 6. gold-rich massive sulfide deposits The seventh type—the Witwatersrand pebble-conglomerate type— may be an ancient alluvial placer, but which others include in the orogenic gold type. In highly ...

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9 Ore Deposits and Economic Minerals – Mineralogy

9.3 Types of Ore Deposits 9.3.1 Magmatic Ore Deposits 9.75 Gold-bearing quartz vein at the Nalunaq Gold Mine in Southern Greenland. Meter stick for scale. Minerals containing elements of economic value are generally present in all igneous rocks, but the elements may not be concentrated enough to make mining economical.

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Gold Deposits - an overview | ScienceDirect Topics

Eoin H. Macdonald, in Handbook of Gold Exploration and Evaluation, 2007 2.4.3 Intrusion-related deposits. Most intrusion-related gold deposits are generated above zones of active subduction at convergent plate margins. The margins range from primitive, through mature island arcs to continental margins. Sillitoe (1993) lists a number of important types: gold-rich copper and gold-only porphyry ...

Read More
(PDF) Epithermal gold deposits. Styles, characteristics ...

1995-9-30 · 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 ...

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Characteristics and Models for Carlin-Type Gold Deposits ...

THIS Gold in 2000volume is organized around a classification of hypogene gold deposits that emphasizes their tectonic setting and relative time of formation compared to their host rocks and other gold deposit types (e.g., Sawkins, 1972, 1990; Groves et al., 1998; Kerrich et al., 2000).The temporal division of orogenic gold deposits into Archean, Proterozoic, and Phanerozoic follows closely the ...

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20.1 Metal Deposits – Physical Geology – 2nd Edition

Gold is present as minute flakes of native gold. This type of environment (i.e., around and above an intrusive body) is also favourable for the formation of other types of deposits—particularly vein-type gold deposits (a.k.a. epithermal deposits). Some of

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(PDF) ORE DEPOSITS (Ore Geology) - ResearchGate

Ore deposits formed by lateral secretion are formed by metamorphic. reactions during shearing, which liberate mineral constituents such as. quartz, sulfides, gold, carbonates and oxides from ...

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OROGENIC MINERALIZATIONS – – A NEW

2013-7-19 · deposit types - has been established by ProMine partners. The ProMine MD database was then queried to extract all deposits of these 16 major types. As a result, 16 homogeneous deposit populations were obtained, that were processed for potential and predictive mapping. ProMine final meeting – Levi – 23. rd . April 2013. Number. Association Name

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Introduction to Mineral Deposit Models - USGS

Mineral Deposit Models Dennis P. Cox and Donald A. Singer, Editors. INTRODUCTION. By Dennis P. Cox, Paul B. Barton, and Donald A. Singer. The U.S. Geological Survey has a long and distinguished history in assessing the mineral resources of the public

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Vein-type ore deposits: Introduction - ScienceDirect

1993-7-1 · Vein-type ore deposits: Introduction. In: S.J. Haynes (Editor), Vein-type Ore Deposits. Ore Geol. Rev., 8:205-211. A vein-type ore deposit is defined here, as: a deposit of ore filling a fissure, or fissures, in rock. This term is non-genetic and is non-restrictive with regard to orientation.

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Gold Deposits - EOLSS

2020-8-18 · 1. orogenic gold deposits 2. Carlin-type gold deposits 3. epithermal deposits 4. porphyry copper-gold deposits 5. iron oxide copper-gold deposits 6. gold-rich massive sulfide deposits The seventh type—the Witwatersrand pebble-conglomerate type— may be an ancient alluvial placer, but which others include in the orogenic gold type. In highly ...

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Where to Find Gold Deposits: The Different Types of Gold ...

Placer Gold Deposits (Gold Dust, Flakes & Nuggets in Streams and Creeks) Placer gold deposits start out as lode gold deposits in rock. After many, many years of being subjected to the elements of temperature, wind, water and time, gold-bearing rock can

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Orogenic gold deposits: deposit models to exploration ...

2013-4-10 · Orogenic gold deposits, or gold deposits in metamorphic rocks, are the spatially and temporally most widespread gold deposit type, defining important exploration targets in Precambrian shields and in Phanerozoic orogen ic belts. Detailed material for this globally important deposit type will be provided on tectonic and structural controls,

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(PDF) Epithermal gold deposits. Styles, characteristics ...

1995-9-30 · 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 ...

Read More
Characteristics and Models for Carlin-Type Gold Deposits ...

THIS Gold in 2000volume is organized around a classification of hypogene gold deposits that emphasizes their tectonic setting and relative time of formation compared to their host rocks and other gold deposit types (e.g., Sawkins, 1972, 1990; Groves et al., 1998; Kerrich et al., 2000).The temporal division of orogenic gold deposits into Archean, Proterozoic, and Phanerozoic follows closely the ...

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ORE DEPOSIT TYPES AND THEIR PRIMARY EXPRESSIONS

2005-8-17 · PRIMARY EXPRESSIONS OF ORE DEPOSITS A well known aspect of ore deposit expression is the association of particular ore types with particular host rock assemblages, i.e., the ore-host rock association (e.g., Stanton, 1972). This association broadly reflects the geological environment and processes that have formed the ore.

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20.1 Metal Deposits – Physical Geology – 2nd Edition

Gold is present as minute flakes of native gold. This type of environment (i.e., around and above an intrusive body) is also favourable for the formation of other types of deposits—particularly vein-type gold deposits (a.k.a. epithermal deposits). Some of

Read More
Classification of Mineral Deposits | Geology for Investors

2013-7-29 · Most mineral deposits are formed by more than one process, so attaching a single label to them is difficult. Hence, there is a tendency to talk about Stillwater Complex type or Carlin-type gold deposits, which rather defeats the purpose of finding a general

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(PDF) ORE DEPOSITS (Ore Geology) - ResearchGate

Ore deposits formed by lateral secretion are formed by metamorphic. reactions during shearing, which liberate mineral constituents such as. quartz, sulfides, gold, carbonates and oxides from ...

Read More
OROGENIC MINERALIZATIONS – – A NEW

2013-7-19 · deposit types - has been established by ProMine partners. The ProMine MD database was then queried to extract all deposits of these 16 major types. As a result, 16 homogeneous deposit populations were obtained, that were processed for potential and predictive mapping. ProMine final meeting – Levi – 23. rd . April 2013. Number. Association Name

Read More