Abstract
The distribution of gold in black-shale associations in various parts of the crust is non-uniform, but in most regions, the contents of the metal in carbonaceous shales are elevated by factors of 5-10: 6.7-65 ppb. A general estimate of average Au contents is given: 14.7 ppb for carbonaceous rocks and 2.0 ppb for clay shales. The main concentrator mineral is pyrite, which contains 27-1360 ppb. The pyrite content in sulphidized horizons in black shale ranges from 58-2000 ppm up to 2-6% by volume. The gold in the carbonaceous material often constitutes 18-60% of the total gold content of the rock. Aureoles of elevated gold content in black-shale horizons are controlled by jointing zones and are related to hydrothermal and metasomatic processes causing the redistribution and influx of heavy-metal components with plutonic solutions 032(KaAu = or > 10-300). Diagenesis also tends to raise Au contents in terrigenous beds. (Author's abstract)-A.W.H.Polytechnical Inst., Tomsk, USSR.
| Original language | English |
|---|---|
| Pages (from-to) | 114-124 |
| Number of pages | 11 |
| Journal | Geochemistry International |
| Volume | 23 |
| Issue number | 5 |
| Publication status | Published - 1986 |
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ASJC Scopus subject areas
- Geochemistry and Petrology
- Geophysics
Cite this
Gold distributions in black shale associations. / Korobeynikov, A. F.
In: Geochemistry International, Vol. 23, No. 5, 1986, p. 114-124.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Gold distributions in black shale associations.
AU - Korobeynikov, A. F.
PY - 1986
Y1 - 1986
N2 - The distribution of gold in black-shale associations in various parts of the crust is non-uniform, but in most regions, the contents of the metal in carbonaceous shales are elevated by factors of 5-10: 6.7-65 ppb. A general estimate of average Au contents is given: 14.7 ppb for carbonaceous rocks and 2.0 ppb for clay shales. The main concentrator mineral is pyrite, which contains 27-1360 ppb. The pyrite content in sulphidized horizons in black shale ranges from 58-2000 ppm up to 2-6% by volume. The gold in the carbonaceous material often constitutes 18-60% of the total gold content of the rock. Aureoles of elevated gold content in black-shale horizons are controlled by jointing zones and are related to hydrothermal and metasomatic processes causing the redistribution and influx of heavy-metal components with plutonic solutions 032(KaAu = or > 10-300). Diagenesis also tends to raise Au contents in terrigenous beds. (Author's abstract)-A.W.H.Polytechnical Inst., Tomsk, USSR.
AB - The distribution of gold in black-shale associations in various parts of the crust is non-uniform, but in most regions, the contents of the metal in carbonaceous shales are elevated by factors of 5-10: 6.7-65 ppb. A general estimate of average Au contents is given: 14.7 ppb for carbonaceous rocks and 2.0 ppb for clay shales. The main concentrator mineral is pyrite, which contains 27-1360 ppb. The pyrite content in sulphidized horizons in black shale ranges from 58-2000 ppm up to 2-6% by volume. The gold in the carbonaceous material often constitutes 18-60% of the total gold content of the rock. Aureoles of elevated gold content in black-shale horizons are controlled by jointing zones and are related to hydrothermal and metasomatic processes causing the redistribution and influx of heavy-metal components with plutonic solutions 032(KaAu = or > 10-300). Diagenesis also tends to raise Au contents in terrigenous beds. (Author's abstract)-A.W.H.Polytechnical Inst., Tomsk, USSR.
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M3 - Article
VL - 23
SP - 114
EP - 124
JO - Geochemistry International
JF - Geochemistry International
SN - 0016-7029
IS - 5
ER -