Gaoyan
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Location - China<
Age (of protore) - Neoproterozoic ~660 Ma
Original size - 3.1 million tonnes of Mn
References
Fan, D-L., Ye, J., Yin, L-M., and Zhang, R-F., 1999, Microbial processes in the formation of the Sinian Gaoyan manganese carbonate ore, Sichuan Province, China: Ore Geology Reviews, v. 15, p. 79-93.
major elements - trace elements - rare-earth elements - REE normalized - isotopes
Major Elements, oxide percent
|
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
% |
% |
% |
% |
% |
% |
% |
% |
% |
% |
% |
||
MnO |
Fe2O3t |
SiO2 |
Al203 |
CaO |
MgO |
K2O |
Na2O |
TiO2 |
P205 |
LOI |
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Average
|
Mn ore |
33.96 |
4.67 |
17.07 |
6.20 |
3.52 |
|
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| Gy23-1 | Rhodochrosite | 36.6 | 2.82 | 11.8 | 16.0 |
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| Gy53 | Rhodochrosite | 35.0 | 2.46 | 26.5 | 3.73 | 2.05 | 9.0 |
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| Gy26-1 | Rhodochrosite | 34.9 | 3.85 | 13.5 | 3.92 | 4.28 |
|
17.9 |
|||||
| Gy38 | Rhodochrosite | 34.5 | 18.70 | 18.7 | 7.23 | 3.49 | 0.25 |
7.1 |
|||||
| Gy30 | Rhodochrosite | 34.0 | 2.53 | 15.5 | 6.02 | 3.27 | 0.4 |
10.9 |
|||||
| Gy39 | Rhodochrosite | 33.8 | 2.23 | 14.2 | 8.89 | 4.33 | 0.2 |
12.5 |
|||||
| Gy37 | Rhodochrosite | 33.1 | 3.47 | 20.2 | 4.83 | 3.84 | 0.4 |
19.6 |
|||||
| Gy40 | Rhodochrosite | 32.6 | 3.86 | 20.5 | 3.58 | 3.94 | 0.15 |
13.1 |
|||||
| Gy34 | Rhodochrosite | 31.1 | 2.12 | 12.7 | 11.4 | 2.99 | 4.9 |
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| Gy42 | Dolomite | 9.88 | 2.64 | 16.0 | 20.1 | 10.6 | 5.9 |
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| Gy44 | Dolomite | 5.87 | 2.22 | 21.2 | 20.1 | 12.0 | 4.7 |
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| Gy48 | Dolomite | 3.96 | 2.43 | 18.0 | 21.1 | 13.3 | 7.8 |
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Trace elements, ppm
|
|---|
blank or nr = not reported; bd = below detection
Rare-earth elements, ppm
|
Rare-earth elements, normalized to chondritic values of Taylor & McLennan (1992) |
Isotopes |
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Sample |
lithology | δ34S ore, sulfide | %S host | δ34S host, sulfide | δ13C pdb | δ18O pdb | δ18O smow | MnO % | CaO % | 87Sr/86Sr | |||||
| avg | Mn ore | -4.88 |
-2.96 |
27.81 |
33.96 |
|
|||||||||
| Gy23-1 | Rhodochrosite | -4.2 | -4.15 | 26.6 | 36.6 | ||||||||||
| Gy53 | Rhodochrosite | -2.2 | -2.15 | 28.6 | 35.0 | 3.73 | |||||||||
| Gy26-1 | Rhodochrosite | -9.3 | -0.6 | 30.2 | 34.9 | 3.92 | |||||||||
| Gy38 | Rhodochrosite | -3.2 | -1.9 | 28.9 | 34.5 | 7.23 | |||||||||
| Gy30 | Rhodochrosite | -4.6 | -2.3 | 28.5 | 34.0 | 6.02 | |||||||||
| Gy39 | Rhodochrosite | -3.4 | -3.9 | 26.8 | 33.8 | 8.89 | |||||||||
| Gy37 | Rhodochrosite | -4.4 | -3.75 | 27.0 | 33.1 | 4.83 | |||||||||
| Gy40 | Rhodochrosite | -4.8 | -1.3 | 29.5 | 32.6 | 3.58 | |||||||||
| Gy34 | Rhodochrosite | -7.8 | -6.55 | 24.1 | 31.1 | 11.4 | |||||||||
| Gy42 | Dolomite |
-7.5 | -8.9 | 21.7 | 9.88 | 20.1 | |||||||||
| Gy44 | Dolomite | -4.1 | -6.0 | 24.7 | 5.87 | 20.1 | |||||||||
| Gy48 | Dolomite | -2.5 | -5.1 | 25.6 | 3.96 | 21.1 | |||||||||
