Types of Copper Deposits in the World An Investor s

nbsp 0183 32 Types of copper deposits Determining value As mentioned there are many factors to look at when determining the value of a copper deposit Among

SEDIMENT HOSTED AU DEPOSITS MODEL 26a Berger

18 ensp 0183 ensp Carlin type deposits are epigenetic large tonnage low grade sediment hosted disseminated gold deposits The deposits are known mainly in northern Nevada and northwestern Utah where they are arranged in clusters and belts The deposits in this region are estimated to contain about 5 000 tonnes of gold more than half of which 3100

CHARACTERISTICS AND ORIGIN OF THE CARLIN TYPE

This type of gold deposits occurs locally as many superlarge ore deposits In the minerogenetic regions of this type of gold deposits very thick and widely distributed Paleozoic Mesozoic miogeosyncline sediments are developed tectonic movements and magmatic activities were developed extensively at the same time favoring ore formation and the formation of geothermal systems and the cycling

VEIN DEPOSITS

Vein deposits include most gold mines many large silver mines and a few copper and lead zinc mines Veins commonly consist of quartz sometimes of several varieties such as amethystine or chalcedony usually occurring as interlocking crystals in a variety of sizes or as finely laminated bands parallel to the walls of the vein

THE SOURCE AND TIMING OF GOLD IN OROGENIC GOLD DEPOSITS

The idea that gold concentrations are derived from host rock as the source of gold in deposits in Central Victoria is not new Australian geologist Daintree studying the layers of gold wrote into 1866 I had long ago come to the conclusion that most if not all

Carlin type gold deposits in SW Guizhou Province China represent the world s second largest concentrations of this type of deposits and show a close spatial relationship with paleo petroleum reservoirs Whether gold genesis is genetically related to the paleo

Carlin Type Gold Deposits

169 2005 Society of Economic Geologists Inc Economic Geology 100th Anniversary Volume pp 451–484 Carlin Type Gold Deposits in Nevada Critical Geologic Characteristics and Viable Models JEAN S CLINE University of Nevada Las Vegas 4505

Elephants in the Nevada Desert Carlin type Gold

Carlin type gold deposits account for 9 of the world s gold production These deposits are typically low grade high tonnage and they appear to be largely confined to Nevada USA While gold was first discovered in Nevada in the 1870 s it wasn t until 1961 when Newmont discovered and developed the first mine along a structurally faulted area now known as the Carlin Trend

Orogenic gold deposits A proposed classification in the

The so called mesothermal gold deposits are a distinctive type of gold deposit which is typified by many consistent features in space and time These have been summarized in a variety of comprehensive ore deposit model descriptions that include Bohlke 1982 Colvine et al 1984 Berger 1986 Groves and Foster 1991 Nesbitt 1991 Hodgson 1993 and Robert 1996

Lithogeochemistry of Carlin type gold mineralization in the Gold

The Gold Bar district contains five Carlin type gold deposits and four resources for a combined gold endowment of 1 6 M oz 50 t The gold deposits are hosted in Devonian carbonate rocks below parautochthonous and allochthonous

What Makes a World class Gold Deposit Investing News

1 What makes a world class gold deposit Look for lode Gold deposits are formed by a wide range of geological processes and according to the US Geological Survey generally fall into two

Carlin Type Gold Deposits in Nevada Critical Geologic

451 Carlin Type Gold Deposits in Nevada Critical Geologic Characteristics and Viable Models JEAN S CLINE † University of Nevada Las Vegas 4505 Maryland Parkway Las Vegas Nev ALBERT H HOFSTRA Mineral Resources

Types of Gold Deposits

27 ensp 0183 ensp Types of Gold Deposits Gold can be described according to its natural size and nature of occurrence Based on these gold occurs in six main forms 1 Large pieces of free gold gt 2mm in size that are known as nuggets 2 Pieces of gold and gangue quartz ironstone etc known as specimens

USGS Open File Report 466

Sedimentary rock hosted Carlin type gold deposits have been considered economically significant and geologically distinct since the early 1960 s This small database is to help western companies to get more information about these gold deposits in China and

Gold History of Use Mining Prospecting Assay amp

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 quot hardrock quot prospector seeking gold at the site of its deposition from mineralizing solutions

Gold Deposit Classification List of 10 Types of Gold Deposits

Gold Auriferous Deposits can be classified into types for which here is a List of 10 Types of Gold Deposits Auriferous porphyry dykes sills and stocks Auriferous pegmatites coarse grained granitic deposits albitite Carbonatites and carbonatite related deposits

NEW TYPE of GOLD Rich Deposit ask Jeff Williams

nbsp 0183 32 Rich Gold deposits can be found in Brecciated zones that have undergone hydrothermal alteration with mineralization These fall under the category of Propylitic alteration One of our viewers

structural altered rock type gold deposits cnki

gold deposits in northern Xinjiang can be divided into seven types namely epithermal gold deposits altered rock type gold deposits in the ductile shear zone micro fine grained dissemination gold deposits supergene and structural altered rock type vein

Exploration

J 2004 31 4 412 ZHANG Fu xin XIAO Li QI Ya lin Exploration and study of Carlin and Carlin like type gold deposits review and prospect J

Different Types of Gold Placers Classification of Placer

Beach Placers fine gold deposits can be found along the beach sands in many locations throughout the world Two well known areas in the United States include the rich deposits of Nome Alaska and the beaches of Southern Oregon Gold is either carried to the ocean by rivers and creeks from nearby sources or eroded directly from wave action along the beaches

The Jiaodong type gold deposits Characteristics origin

The Jiaodong Peninsula in the eastern part of the North China Craton NCC constitutes China s richest gold province and one of the major gold fields in Asia Goldfarb et al 2014 The Early Cretaceous ca 125–120 Ma Goldfarb and Santosh 2013 Yang and Santosh 2014 gold deposits in this region have been broadly classified into two types 1 the Linglong type occurring as

Carlin–type gold deposit

Carlin–type gold deposits are sediment hosted disseminated gold deposits These deposits are characterized by invisible typically microscopic and or dissolved gold in pyrite and arsenopyrite This dissolved kind of gold is called quot Invisible Gold quot as it can only be

Gold Deposits

Gold Deposits Homestake Mine located in western South Dakota was created in 1876 Since the first production in 1878 almost 28 million troy ounces of gold have been extracted worth 987 million dollars at present price causing the mine to be the most valuable in the United States

Gold deposits rich in bismuth minerals An important type

Abstract Several gold deposits both in China and abroad are drawing attention because of their abundant bismuth minerals Comparative studies on some of them indicate that certain characteristics can aid in identifying standards and exploration criteria of the type

PDF IDENTIFYING THE GOLD DEPOSIT TYPE OF ONZON

Onzon Kanbani gold deposits located in Thabeikkyin Township Mandalay region Central Myanmar It is west 85km faraway from well know Mogok Township quot ruby land This area is a middle part of N S

Types of Gold Deposits

Types of Gold Deposits Gold can be described according to its natural size and nature of occurrence Based on these gold occurs in six main forms 1 Large pieces of free gold gt 2mm in size that are known as nuggets 2 Pieces of gold and gangue quartz

DIVERSITY OF CARLIN STYLE GOLD DEPOSITS

Diversity of Carlin Style Gold Deposits 1 John L Muntean and Jean S Cline Chapter 1 Nevada s Carlin Type Gold Deposits 7 What We ve Learned During the Past 10 to 15 Years Jean S Cline Chapter 2 The Carlin Gold System Applications to Exploration in 39

Orogenic type deposits

Predicting and identifying new type mineralizations is an important aim of ore deposit study To date the majority of orogenic type gold deposits has been well shown by worldwide studies However the other commodities of orogenic type are rarely discussed

Geology of Gold Mineralization amp How Gold Deposits

Beach Placers fine gold deposits can be found along the beach sands in many locations throughout the world Two well known areas in the United States include the rich deposits of Nome Alaska and the beaches of Southern Oregon Gold is either carried to the ocean by rivers and creeks from nearby sources or eroded directly from wave action along the beaches

Gold Deposits Gold info

Important deposits of this type are found in the USA Africa Western Australia Ghana and Brazil Epithermal Gold Deposits Epithermal deposits also belong to the primary gold deposits Here the gold lies fairly close to the surface in a depth of up to 1500 metres

Geology of the Sepon Copper and Gold Deposits Laos

18 ensp 0183 ensp additional areas of gold mineralization at Vang Ngang and Namkok West and copper gold mineralization at Khanong on the flanks of the Padan porphyry intrusion Fig 2 Manini et al 2001 Mineralization in the Sepon area was identified as having affinities to the Carlin type sediment hosted gold deposits of Nevada Sillitoe 1994

Gold Deposits in Metamorphic Belts Overview of Current

0128 01 3313 29 6 00 1 Gold Deposits in Metamorphic Belts Overview of Current Understanding Outstanding Problems Future Research and Exploration Significance DAVID I GROVES † Centre for Global Metallogeny Department of Geology and

Are There Carlin Type Gold Deposits in China A

In this study we selected the Shuiyindong and Jinfeng deposits two of the largest Guizhou Carlin type gold deposits to compare with the Getchell and Cortez Hills deposits two large but typical Nevada Carlin type Au deposits located in the Getchell and Cortez districts respectively This is the first study in which sample transects from both the Nevada and Guizhou deposits were

Red Clay Type Gold Deposits in China Acta Geologica

Red clay type gold deposits located in the south of China are situated not only in orogenic belts but also in inner cratons where climate is tropical subtropical with clear arid and humid The lateritic weathering crust often can be divided into five zones including topsoil siliceous duricrust zone multi color zone or red clay zone in some deposits pallid zone and saprolite

Carlin–type gold deposit

18 ensp 0183 ensp Carlin–type gold deposits are sediment hosted disseminated gold deposits These deposits are characterized by invisible typically microscopic and or dissolved gold in pyrite and arsenopyrite This dissolved kind of gold is called quot Invisible Gold quot as it can only be found through chemical analysis

Gold mining

Gold Deposits of this type contain the vast majority of gold It will usually be a Quartz rock with gold intertwined within If you find a piece of Quartz with gold in it you are probably very near to the mother lode although it will most likely have been eroded by the

GEOLOGY OF SEDIMENTARY ROCK HOSTED GOLD DEPOSITS

sedimentary rock hosted gold deposits surrounding this fold are the Bannian Yangyuo Begao and Luodong deposits and the Qingping Tangxinzhai prospects appendix I Luo X H 1994 Stratabound breccia bodies also are a type of ore controlling structure

Distribution character and genesis of gold deposits in

Epigenetic gold deposits in metamorphic terranes include those of the Precambrian shields approx 23 000–25 000 t Au particularly the Late Archean greenstone belts and Paleoproterozoic fold belts and of the late Neoproterozoic and younger Cordilleran style

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