trace elements associated with gold deposits.

Trace elements in fluid inclusions of sediment-hosted gold ...

Our distinction of fluid end members based on trace elements is supported by data reported from other hydrothermal ore deposits. Fluid inclusion analyses from Bingham Canyon and other porphyry Cu-Mo-Au deposits confirm selective enrichment of B and As in magmatic vapor, in contrast to enrichment of Rb, Cs, and K in magmatic brines ( Fig. 3 ...

Major and Trace Element Chemical Compositional Signatures ...

We analyzed the major and trace element chemical compositions of 66 gra-nitic rocks from 15 different areas in Japan. The intrusions from which the samples were collected were associated with Pb-Zn, Mo, Cu-Fe, Sn, or W mi-neralization and, for comparison, samples were also collected from intrusions not associated with any metal mineralization.

Geochemistry and geophysics of iron oxide-apatite deposits ...

The iron oxide-apatite (IOA) deposits of the eastern Adirondack Highlands, New York, are historical high-grade magnetite mines that contain variable concentrations of rare earth element (REE)-bearing apatite crystals. The majority of the deposits are hosted within sodically altered Lyon Mountain granite gneiss, although some deposits occur within paragneiss, gabbro, anorthosite, or ...

Geochemistry of the Copper Flat porphyry and associated ...

Geochemistry of the Copper Flat porphyry and associated deposits in the Hillsboro mining district, Sierra County, New Mexico, USA ... placer gold deposits. Lovering (1972) and Lover-ing and Heyl (1989) briefly described jasperoid in ... by XRF on fused glass discs and trace elements were analyzed using pressed powder briquettes. Major el-

Quartz-Pebble-Conglomerate Gold Deposits

ore zones within quartz-pebble-conglomerate gold deposits. These deposits concentrate gold along a bedrock surface because of the density of the gold particles relative to …

UNCLOAKING INVISIBLE GOLD: USE OF NANOSIMS TO EVALUATE ...

NanoSIMS maps reveal that gold occurs in two discrete episodes in each deposit. Elevated gold concentrations correlate with elevated concentrations of As, Sb, Cu ± Te, and lower 34 S/ 32 S ratios, compared to periods when gold was not deposited. Precipitation of elevated gold and trace elements at West Banshee was followed by precipitation of ...

Magmatic-Hydrothermal Gold Mineralization at the Lone Tree ...

Nanoscale secondary ion mass spectrometry analyses show that gold and associated trace elements occur in submicron-scale zones within arsenopyrite rims on pyrite. The average δ 34 S values of the arsenopyrite rims are 5.3 to 6.5‰ heavier than the pyrite cores, indicating cooling and an increasing H 2 S/SO 2 ratio. The highest grades resulted ...

Plutonic-Related Gold Deposits of Interior Alaska ...

Plutonk-relcttcd gold deposits in interior Alaska occur in the apexes of middle Cretaceous (mostly 93-86 Ma) reduced plutons and in spatially associated sedimentary and metamorphic rocks. Hydrothermal micas from these deposits have cooling ages 0 to 2 m.y. younger than those of magmatic micas and amphiboles from hosting intrusions.

USGS: Mineral Resources On-Line Spatial Data: gold

Petrology of volcanic rocks associated with silver-gold (Ag-Au) epithermal deposits in the Tonopah, Divide, and Goldfield Mining Districts, Nevada Miocene calc-alkaline volcanic rocks, part of the southern segment of the ancestral Cascades magmatic arc, are spatially, temporally, and likely genetically associated with precious metal epithermal ...

A Carbonaceous Sedimentary Source-Rock Model for Carlin ...

A Carbonaceous Sedimentary Source-Rock Model for Carlin-Type and Orogenic Gold Deposits ... organic matter, sedimented under anoxic to euxinic conditions, immobilizes and concentrates gold, arsenic, and a range of trace elements (particularly V, Ni, Se, Ag, Zn, Mo, Cu, U) present in marine bottom waters, into fine-grained black mudstone and ...

Statistical Study of Selected Trace Elements with ...

STATISTICAL STUDY OF SELECTED TRACE ELEMENTS WITH REFERENCE TO GEOLOGY AND GENESIS OF THE CARLIN GOLD DEPOSIT, NEVADA By MICHAEL HARRIS and ARTHUR S. RADTKE ABSTRACT Linear regression and discriminant analyses techniques were I applied to gold, mercury, arsenic, antimony, barium, copper,

Trace-element geochemistry of pyrite and arsenopyrite: ore ...

The distribution of Au and associated trace elements in pyrite and arsenopyrite from late Archean Hutti and Hira-Buddini orogenic gold deposits, eastern Dharwar Craton, southern India was investigated by laser ablation-inductively coupled plasma-mass spectrometry.

(PDF) Accumulation of Trace Elements into Black Shale ...

It is inferred that sediments coeval with those where sedimentary pyrite is enriched in Au and associated trace elements are more likely to be source rocks of orogenic and Carlin-style gold deposits.

Trace elements in fluid inclusions of sediment-hosted gold ...

GEOLOGY | Volume 44 | Number 12 | 1015 Trace elements in fluid inclusions of sediment-hosted gold deposits indicate a magmatic-hydrothermal origin of the Carlin ore trend Simon J.E. Large1, Edine Y.N. Bakker1, Philipp Weis1,2, Markus Wälle1, Mike Ressel3, and Christoph A. Heinrich1,4 1Institute of Geochemistry and Petrology, Department of Earth Sciences, ETH Zurich, …

Geology and trace-element geochemistry of the Umuna gold ...

Geology and trace-element geochemistry of the Umuna gold-silver deposit, Misima Island, Papua New Guinea ... a number of gold occurrences peripheral to the deposit may be the result of localized enrichments in the distal parts of this system. Alteration mineralogy associated with mineralization is characterized by sericite-smectite adjacent to ...

Gold, Mining and Prospecting: Trace Minerals found with Gold

Trace Minerals found with Gold Forward: ... These are the most common minerals associated with lode gold; there are others. Posted by Geotek at ..., indicator minerals, lode deposits, magnetite, metal bearing minerals, placer deposits, trace elements, trace minerals. 6 comments: Unknown April 6, ...

Uncloaking invisible gold: Use of NanoSIMS to evaluate ...

Uncloaking invisible gold: Use of NanoSIMS to evaluate gold, trace elements, and sulfur isotopes in pyrite from Carlin-type gold deposits Article in Economic Geology 104(7):897-904 · December ...

Mineral hosts for gold and trace elements in the regolith ...

Mineral-trace element associations have been investigated in the regolith developed onmineralised rocks, at the Boddington Cu-Au deposit and Mt Percy gold deposit, WesternAustralia. A detailed characterisation of the mineralogy and geochemistry has been achievedusing in situ microanalyses on regolith materials. The use of Laser Ablation-InductivelyCoupled Plasma-Mass Spectrometry (LA-ICP …

trace elements associated with gold deposits

Gold, Mining and Prospecting: Trace Minerals …. 3 · : Gold, Mining and Prospecting · · Lode gold is found in solid rock that is often discovered by tracing placer gold back to its source often using the indicator minerals found associated...

Intrusion Related Gold Deposits

associated granite suites may elsewhere be associated with Sn-W and W-Mo-Bi-(Sn) mineralisation. • Trace elements in alteration associated with fractionated granites can include F, B, Cs, Rb, and Li. Yttrium-, Th- and REE-bearing minerals such as xenotime can be present in associated greisens and veins. Surficial geochemical criteria

In-situ trace elements on pyrite and arsenopyrite of the ...

1. Introduction. Laser ablation inductively-coupled plasma mass spectrometry (LA-ICPMS) has been widely applied to investigate gold and associated trace elements in auriferous pyrite and arsenopyrite from lode-gold deposits (Large et al., 2009, Cook et al., 2013, Li et al., 2014, Deng et al., 2020a).Studies of gold occurrence in these sulfides revealed that gold is concentrated with some ...

VOLCANIC-ASSOCIATED MASSIVE SULFIDE DEPOSITS …

Volcanic-associated massive sulfide deposits are among the most likely of all deposit types to have associated ... Deposit trace element geochemistry ... can contain anomalous concentrations of gold, silver, and cobalt. Deposits associated with felsic volcanic and

Distribution and speciation of trace elements in iron and ...

1. Introduction. Fe and Mn oxides are highly reactive minerals found in sedimentary environments, where they influence the fate and transport of potentially toxic trace elements and essential micronutrients (Brown et al., 1999, Brown and Parks, 2001, Manceau et al., 2002b).These minerals commonly occur as crusts and coatings on outcrops and stream pebbles, as nodules in soils and in marine and ...

List Minerals Associated with Gold

To know what type of rock is gold associated with you must see that the minerals most common in placer deposits are platinum, iridosmine, magnetite, iron pyrites, ilmenite, zircon, garnets, rutile and barytes; wolfram, scheelite, brookite and diamonds are less common. Diamonds are associated with gold in Brazil, and also occasionally in the Urals and in the United States. In auriferous quartz ...

Trace element characteristics of selected epithermal gold ...

These elements (Hg, Sb, and Tl) are closely associated with eath other in epithermal deposits, but do not covary with gold. Furthermore, Bi, Te and W are less enriched in epithermal deposits as ...

Identifying Pathfinder Elements for Gold in Multi-Element ...

gold prospects in the Wa-Lawra gold belt, northwest Ghana. The objectives of the study were to define gold relation- ships with other trace elements to determine possible pathfinder elements for gold from the soil geochemical data. The study focused on seven elements, namely, Au, Fe, Pb, Mn, Ag, As and Cu. Factor analysis and hierarchical cluster

Multi-Stage Evolution of Gold-Bearing Hydrothermal Quartz ...

quartz and its trace elements chemistry will provide insight into the structure and composition of veins at the gold deposit. Such information will help to better understand the quartz vein genesis at the Mokrsko gold deposit. 2. Mokrsko Gold Deposit 2.1. Geological Setting

CU, AU, AND ZN-PB SKARN DEPOSITS (MODELS 18b,c; Cox …

Summary statistics for trace elements associated with selected Cu-Au skarn deposits are presented in tables 1 to 3. Ranges and means for elements (As, Cd, Se, Pb, Cr, and Hg) that are potentially harmful to aquatic biota are highly variable among deposits of the same type, and within different parts of single deposits (table 1A -C). 92 2 -----

Elements Associated with Gold

On a Periodic Table, elements often found to associate with gold have been group/classified. Elements Universally Associated with Gold Elements Typical in Minerals Commonly Associated with Gold Elements Concentrated in Gold Bearing Mineral Associations of Individual Orebodies Elements Characteristic of Gold Only Ores Elements with Traces Commonly found in Gold and its …

Prospecting for Minerals

Geochemical prospecting is based on systematic measurement of one or more of the chemical properties of rock, soil, glacial debris, stream sediment, water, or plants. The chemical property most commonly measured is the content of a key "trace" element.

Distribution of trace elements between carbonaceous matter ...

1. Introduction. Carbonaceous matter (CM), which is also referred to organic matter, bitumen, kerogen, graphite, hydrocarbon, and humic substances in the literature, is commonly associated with sulfides in sedimentary rocks, and can liberate a variety of volatile species and trace elements into fluids during burial, thermal, and regional metamorphism (e.g., Large et al., 2011).

Gold and associated trace elements in Newfoundland lake ...

Gold and associated trace elements in Newfoundland lake sediment: their application to gold exploration ... Gold is the only universal indicator although Sb gives a broader dispersion pattern at the Hope Brook deposit. Copper, Pb and Zn have above-background content down-ice from some mineralized zones.

Lucia M. Patterson Department of Geological Sciences and ...

Vertical and lateral zoning patterns between Au and associated trace elements at the Deep Star deposit have been documented most recently by Heitt et al. (2003). Correlations between Au and clay minerals in CTGDs have been documented by Kuehn and Rose (1992) at the Carlin deposit, Cail and Cline (2001) at theGetchelldeposit,andHeittetal.

The Geology of Rare Earth Elements

An economic method for recovering rare earth elements from these deposits has not yet been found. Many other deposits of this type have been identified around the world, but information on their rare earth elements content is generally lacking. Trace amounts of rare earth elements have also been identified in magnetite-apatite replacement deposits.

Browse the USGS Publications Warehouse

Reconnaissance for radioactivity in the Gold Hill Mining Area, Boulder County, Colorado, Part 1, 1955, Trace Elements Memorandum 563 A A study of radioactivity in modern stream gravels and its possible application as a prospecting method, 1955, Trace Elements Memorandum 629

Iron oxide copper gold ore deposits - Wikipedia

Iron oxide copper-gold deposits are also often associated with other valuable trace elements such as uranium, bismuth and rare-earth metals, although these accessories are typically subordinate to copper and gold in economic terms. Some examples include the Olympic Dam, South Australia, and Candelaria, Chile, deposits.

Spitskop deposit, West Coast District, Western Cape, South ...

Reference: Belcher, R.W., Rozendaal, A. and Przybylowicz, W.J. (2004): Trace element zoning in pyrite determined by PIXE elemental mapping: evidence for varying ore-fluid composition and electrochemical precipitation of gold at the Spitskop deposit, Saldania Belt, …

Trace element composition of iron oxides from IOCG and IOA ...

Jul 17, 2018· Trace element compositions of magnetite and hematite from 16 well-studied iron oxide–copper–gold (IOCG) and iron oxide apatite (IOA) deposits, combined with partial least squares-discriminant analysis (PLS-DA), were used to investigate the factors controlling the iron oxide chemistry and the links between the chemical composition of iron oxides and hydrothermal processes, as …