Abstract
Applicability of oxygen isotope geothermometers to sulphate minerals from the Kuroko deposits has been discussed by utilizing oxygen isotope fractionation factors determined for the anhydrite-water and baryte-water systems, together with the existing isotopic data and models. The depositional T of the anhydrite- gypsum orebody at the Shakanai mine is estimated to be approx 200oC, assuming direct precipitation of anhydrite from sea-water. At these T approx 50% of calcium sulphate originally dissolved in the Miocene sea-water was precipitated to form the orebody. The total volume of sea-water required to produce a known amount of the anhydrite- gypsum orebody was calculated. Baryte in the black ore from the Shakanai mine may have been precipitated at T considerably lower than 250oC which is widely accepted as the depositional T of the black ores based on the sulphur isotopic data. However, this discrepancy remains to be studied in the future, because the number of oxygen isotopic data from the baryte and ore solutions is very limited.- H.S.
| Original language | English |
|---|---|
| Title of host publication | Mining Geology |
| Pages | 257-264 |
| Number of pages | 8 |
| Volume | 29 |
| Edition | 4 |
| Publication status | Published - 1979 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Environmental Science(all)
Cite this
Oxygen isotope geothermometry applicable to sulphate minerals from the Kuroko deposits. / Kusakabe, M.; Chiba, H.
Mining Geology. Vol. 29 4. ed. 1979. p. 257-264.Research output: Chapter in Book/Report/Conference proceeding › Chapter
}
TY - CHAP
T1 - Oxygen isotope geothermometry applicable to sulphate minerals from the Kuroko deposits.
AU - Kusakabe, M.
AU - Chiba, H.
PY - 1979
Y1 - 1979
N2 - Applicability of oxygen isotope geothermometers to sulphate minerals from the Kuroko deposits has been discussed by utilizing oxygen isotope fractionation factors determined for the anhydrite-water and baryte-water systems, together with the existing isotopic data and models. The depositional T of the anhydrite- gypsum orebody at the Shakanai mine is estimated to be approx 200oC, assuming direct precipitation of anhydrite from sea-water. At these T approx 50% of calcium sulphate originally dissolved in the Miocene sea-water was precipitated to form the orebody. The total volume of sea-water required to produce a known amount of the anhydrite- gypsum orebody was calculated. Baryte in the black ore from the Shakanai mine may have been precipitated at T considerably lower than 250oC which is widely accepted as the depositional T of the black ores based on the sulphur isotopic data. However, this discrepancy remains to be studied in the future, because the number of oxygen isotopic data from the baryte and ore solutions is very limited.- H.S.
AB - Applicability of oxygen isotope geothermometers to sulphate minerals from the Kuroko deposits has been discussed by utilizing oxygen isotope fractionation factors determined for the anhydrite-water and baryte-water systems, together with the existing isotopic data and models. The depositional T of the anhydrite- gypsum orebody at the Shakanai mine is estimated to be approx 200oC, assuming direct precipitation of anhydrite from sea-water. At these T approx 50% of calcium sulphate originally dissolved in the Miocene sea-water was precipitated to form the orebody. The total volume of sea-water required to produce a known amount of the anhydrite- gypsum orebody was calculated. Baryte in the black ore from the Shakanai mine may have been precipitated at T considerably lower than 250oC which is widely accepted as the depositional T of the black ores based on the sulphur isotopic data. However, this discrepancy remains to be studied in the future, because the number of oxygen isotopic data from the baryte and ore solutions is very limited.- H.S.
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UR - http://www.scopus.com/inward/citedby.url?scp=0018657785&partnerID=8YFLogxK
M3 - Chapter
AN - SCOPUS:0018657785
VL - 29
SP - 257
EP - 264
BT - Mining Geology
ER -