Geochemistry and exploration criteria for epithermal cinnabar and stibnite vein deposits in the Kuskokwim River region, southwestern Alaska

Gray, John Edward; Goldfarb, Richard J.; Detra, D.E.; Slaughter, K.E.

doi:10.1016/0375-6742(91)90009-j

Cited by 13 publications

(4 citation statements)

References 4 publications

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“…Veins containing cinnabar and liquid Hg in the open pit and small ore piles at the mine site are sources of Hg that have eroded into Cinnabar Creek. Abundant cinnabar and a few beads of liquid Hg have been observed in stream-sediment samples collected from Cinnabar Creek (Gray et al 1991).…”

Section: Cinnabar Creek Minementioning

confidence: 98%

Mercury in vegetation and soils at abandoned mercury mines in southwestern Alaska, USA

Gray

Theodorakos

2002

GEEA

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We chemically analysed vegetation (willow and alder) and soil samples collected at three abandoned mercury (Hg) mines and at background sites in southwestern Alaska and compared Hg concentrations, speciation and distribution. Total Hg and methylmercury (MeHg) concentrations were higher in vegetation and soil samples from all the mine sites compared to samples from the background sites, but there was no correlation between total-Hg concentrations in vegetation and total-Hg concentrations in soil or between total-Hg and MeHg concentrations. However, the percent MeHg of the total Hg was higher in samples from the background sites compared to samples from the mine sites and is higher in vegetation samples than in corresponding soil samples. The percent MeHg is an order of magnitude higher in the willow samples than in corresponding alder or soil samples. The percent of divalent Hg [Hg(II)] is highest in soil samples from the retort and background areas. The higher percent MeHg in vegetation and soil in samples from background sites may be explained by the higher proportions of reactive Hg species, such as Hg(II), at these sites compared to the surface mined and tailings areas where most of the Hg is in the elemental and cinnabar (HgS) forms. Dissolved gaseous Hg species are more readily accumulated in vegetation and are more readily methylated than solid phases like HgS and liquid Hg.

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Section: Cinnabar Creek Minementioning

confidence: 98%

Mercury in vegetation and soils at abandoned mercury mines in southwestern Alaska, USA

Gray

Theodorakos

2002

GEEA

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“…The Au-dominant veins are characterized by a single hydrothermal pulse, an intense sericitization and low-temperature formation (FI homogenization temperatures of 121 °C to 316 °C). The Au, Hg, Sb, and Bi metals association is commonly related to shallow epithermal systems (Gray et al,1991;Bornhorst et al, 1995). The source of the fluids in this model, like classic LS epithermal models (Henley, 1986;Sillitoe, 1993;Hedenquist et al, 2000), is meteoric.…”

Section: A New Genetic Model For the San Dimas Districtmentioning

confidence: 99%

Genesis of the telescoped Eocene silver and Oligocene gold San Dimas deposits, Sierra Madre Occidental, Mexico: Constraints from fluid inclusions, oxygen - deuterium and noble gases isotopes

Montoya-Lopera

Levresse

Ferrari

et al. 2020

Ore Geology Reviews

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“…Geochemical exploration is a significant method for finding various types of ore deposits in mineral exploration [1][2][3][4][5][6][7][8]. Many deposits have been discovered by geochemical data processing and anomaly identification [9].…”

Section: Introductionmentioning

confidence: 99%

Identifying Geochemical Anomalies Associated with Gold Mineralization Using Factor Analysis and Spectrum–Area Multifractal Model in Laowan District, Qinling-Dabie Metallogenic Belt, Central China

Chen

Zhao

et al. 2020

Minerals

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The Laowan deposit is a typical gold deposit in the Qinling-Dabie metallogenic belt, which produces the most gold resources in Central China. After being explored for decades, follow-up exploration requires additional theoretical support. In this study, the factor analysis (FA) and spectrum–area (S–A) multifractal model were used to process multi-element geochemical data from 369 samples collected in the study area for identifying the geochemical anomalies associated with gold mineralization. The results showed that: (1) the mean Au content in this region is up to 1000 times higher than the Au background values of the upper crust of the South Qinling unit; (2) the factor analysis revealed that Au, Ag, Cu, As, Sb, and S can be used as direct ore-prospecting criteria; (3) the observed elemental zonation is consistent with the zonation of metallic elements in the magmatic–hydrothermal system. This supports the magmatic–hydrothermal origin of the Laowan deposit; (4) the spectrum–area fractal model can help to decompose the geochemical patterns in a complex geological setting. The decomposed geochemical anomaly map obtained by the S–A multifractal model indicated that highly anomalous areas have a great relationship with the Au occurrence and can be a guidance for further exploration in the study area.

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Geochemistry and exploration criteria for epithermal cinnabar and stibnite vein deposits in the Kuskokwim River region, southwestern Alaska

Cited by 13 publications

References 4 publications

Mercury in vegetation and soils at abandoned mercury mines in southwestern Alaska, USA

Mercury in vegetation and soils at abandoned mercury mines in southwestern Alaska, USA

Genesis of the telescoped Eocene silver and Oligocene gold San Dimas deposits, Sierra Madre Occidental, Mexico: Constraints from fluid inclusions, oxygen - deuterium and noble gases isotopes

Identifying Geochemical Anomalies Associated with Gold Mineralization Using Factor Analysis and Spectrum–Area Multifractal Model in Laowan District, Qinling-Dabie Metallogenic Belt, Central China

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