Dahongshan
Southwest China, southern Kangdian metallogenic belt (western Yangtze Block), China
IOCGFe-Cu (Au)
- Type
- Iron oxide-copper-gold (IOCG)
The largest IOCG deposit of the Kangdian province, in volcano-sedimentary rocks of the Palaeoproterozoic Dahongshan Group; orebodies controlled by lithological contacts and faults, associated with subvolcanic intrusions. Mineralisation bracketed by zircons at 1681 ± 13 and 1659 ± 16 Ma, Neoproterozoic metamorphic overprint (biotite K-Ar and Ar-Ar 820 to 740 Ma). Four stages: albitisation (I, about 550 C), iron oxides (II, 450 C), copper sulphides (III, 350 C), quartz-calcite veins (IV, 250 C). Su et al. (2016): tourmaline delta11B from -14.7 to +5.9 ‰, magmatic fluids in stages I and II then mixing with basinal brines of marine origin.
δ11B in ‰ (per mil) Values of the same system
Standard : NIST SRM 951
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −9.81 ± 1.81 ‰ | −14.67 / −5.66 ‰ | 60 | stage I tourmaline (albitisation, about 550 C) Mean and standard deviation recalculated from 60 analyses, -14.67 to -5.66 (DHS10-13-1-1 -12.26; DHS10-13-1-2 -11.36; DHS10-13-1-3 -11.62; DHS10-13-1-4 -10.92; DHS10-13-1-5 -10.26; DHS10-13-2-1 -5.66; DHS10-13-2-2 -10.95; DHS10-13-2-3 -10.39; DHS10-13-2-4 -9.86; DHS10-13-2-5 -11.19; DHS10-13-2-6 -6.94; DHS10-13-2-7 -10.78; DHS10-13-2-8 -8.11; DHS10-13-2-9 -11.46; DHS10-13-3-1 -9.55; DHS10-13-3-2 -6.98; DHS10-13-3-3 -5.72; DHS10-13-2-10 -7.96; DHS10-13-2-11 -10.93; DHS10-13-2-12 -11.00; DHS10-13-2-13 -10.96; DHS14-96-1 -13.01; DHS14-96-2 -13.07; DHS14-96-3 -14.67; DHS14-96-4 -12.80; DHS14-96-5 -12.32; DHS14-96-6 -12.65; DHS14-96-7 -13.23; DHS13-38-1A -9.42; DHS13-38-2A -9.26; DHS13-38-3A -7.03; DHS13-45-2-1 -10.48; DHS13-45-2-2 -9.95; DHS13-45-2-3 -9.62; DHS13-45-2-4 -9.49; DHS13-45-2-5 -9.43; DHS13-45-3-1 -10.14; DHS13-45-3-2 -10.69; DHS13-45-4-1 -9.49; DHS13-45-4-2 -9.44; DHS13-45-4-3 -9.25; DHS13-45-4-4 -8.07; DHS13-45-4-5 -8.54; DHS13-45-4-6 -9.49; DHS13-45-4-7 -9.29; DHS13-45-4-8 -8.66; DHS13-45-5-1 -9.47; DHS13-45-5-2 -9.11; DHS13-45-5-3 -9.58; DHS13-45-5-4 -9.38; DHS13-38-1B -9.59; DHS13-38-2B -8.82; DHS13-38-3B -8.71; DHS13-38-4B -8.89; DHS13-38-5B -9.11; DHS13-38-6B -8.42; DHS13-38-7B -8.12; DHS13-38-8B -8.16; DHS13-38-9B -8.31; DHS13-38-10B -8.64). Table 3 means: DHS14-96 -13.1 (n = 7); DHS13-38 -8.7 (n = 13); DHS13-45 core -9.2 (n = 10); DHS13-45 rim -9.7 (n = 9); DHS10-13 core -8.8 (n = 12); DHS10-13 rim -11.0 (n = 9). Fluid delta11B calculated by the authors (Meyer et al., 2008): -13.1 to -4.1 ‰. | Su et al. (2016), Using elemental and boron isotopic compositions of tourmaline to trace … |
| −8.56 ± 1.47 ‰ | −11.57 / −5.95 ‰ | 39 | stage II tourmaline (iron oxide ore, about 450 C) Mean and standard deviation recalculated from 39 analyses, -11.57 to -5.95 (DHS13-1-1 -10.05; DHS13-1-2 -9.15; DHS13-1-3 -9.20; DHS13-1-4 -8.76; DHS13-1-5 -8.14; DHS13-1-6 -8.62; DHS13-1-7 -8.99; DHS13-1-8 -9.45; DHS13-1-9 -9.36; DHS13-1-10 -9.05; DHS13-1-11 -9.18; DHS13-1-12 -9.58; DHS13-1-13 -10.24; DHS14-72-1 -10.58; DHS14-72-2 -11.51; DHS14-72-3 -9.86; DHS14-72-4 -11.57; DHS15-49-1 -6.12; DHS15-49-2 -6.78; DHS15-49-3 -8.44; DHS15-49-4 -7.65; DHS15-49-5 -7.56; DHS15-49-6 -7.52; DHS15-49-7 -7.45; DHS15-49-8 -8.00; DHS15-49-9 -7.31; DHS15-49-10 -6.50; DHS15-53-1-1 -9.52; DHS15-53-1-2 -7.09; DHS15-53-1-3 -9.67; DHS15-53-1-4 -7.07; DHS15-53-2-1 -8.32; DHS15-53-2-2 -5.95; DHS15-53-2-3 -6.39; DHS15-53-3-1 -9.53; DHS15-53-3-2 -9.97; DHS15-53-3-3 -10.01; DHS15-53-3-4 -6.99; DHS15-53-3-5 -6.62). Table 3 means: DHS14-72 -10.9 (n = 4); DHS15-49 -7.3 (n = 10); DHS13-1 -9.2 (n = 13); DHS15-53 core -9.5 (n = 6); DHS15-53 rim -6.7 (n = 6). Fluid delta11B calculated by the authors (Meyer et al., 2008): -9.3 to -3.7 ‰. | Su et al. (2016), Using elemental and boron isotopic compositions of tourmaline to trace … |
| −2.46 ± 1.23 ‰ | −4.35 / −0.46 ‰ | 24 | stage III tourmaline (copper sulphide ore, about 350 C) Mean and standard deviation recalculated from 24 analyses, -4.35 to -0.46 (DHS13-60-1-1 -4.35; DHS13-60-1-2 -2.45; DHS13-60-1-3 -2.34; DHS13-60-2-1 -2.59; DHS13-60-2-2 -2.33; DHS13-60-2-3 -2.24; DHS13-60-3-1 -4.27; DHS13-60-3-2 -3.73; DHS13-60-3-3 -3.25; DHS13-60-3-4 -3.76; DHS13-60-4-2 -3.41; DHS13-60-4-3 -3.37; DHS13-60-4-4 -3.12; DHS13-60-5-1 -3.20; DHS13-60-5-2 -2.75; DHS13-60-5-3 -2.70; DHS15-134-1-1 -1.03; DHS15-134-1-2 -0.84; DHS15-134-2-1 -0.46; DHS15-134-2-2 -0.81; DHS15-134-3-1 -3.62; DHS15-134-3-2 -1.23; DHS15-134-4-1 -0.46; DHS15-134-4-2 -0.75). Table 3 means: DHS13-60 -3.1 (n = 16); DHS15-134 -1.2 (n = 8). Fluid delta11B calculated by the authors (Meyer et al., 2008): -1.2 to +2.6 ‰. | Su et al. (2016), Using elemental and boron isotopic compositions of tourmaline to trace … |
| 3.98 ± 0.56 ‰ | 2.95 / 5.88 ‰ | 27 | stage IV tourmaline (late quartz-tourmaline-dolomite vein, about 250 C) Mean and standard deviation recalculated from 27 analyses, +2.95 to +5.88 (DHS13-71-1-1 +2.95; DHS13-71-1-2 +3.74; DHS13-71-1-3 +3.68; DHS13-71-1-4 +2.99; DHS13-71-1-5 +3.88; DHS13-71-1-7 +3.70; DHS13-71-1-8 +3.43; DHS13-71-1-9 +4.13; DHS13-71-1-10 +5.88; DHS13-71-2-1 +4.17; DHS13-71-2-2 +4.02; DHS13-71-2-3 +3.95; DHS13-71-2-4 +4.22; DHS13-71-2-5 +3.76; DHS13-71-2-6 +3.94; DHS13-71-2-7 +3.64; DHS13-71-3-1 +4.09; DHS13-71-3-2 +4.37; DHS13-71-3-3 +3.76; DHS13-71-3-4 +3.79; DHS13-71-3-5 +4.35; DHS13-71-3-6 +4.22; DHS13-71-3-7 +3.69; DHS13-71-5-1 +3.64; DHS13-71B-1 +4.18; DHS13-71B-2 +4.49; DHS13-71B-3 +4.79). Table 3 means: DHS13-71 core +4.1 (n = 17); DHS13-71 rim +3.8 (n = 10). Fluid delta11B calculated by the authors (Meyer et al., 2008): +7.4 to +10.4 ‰. Two spots at +12.10 and +9.46 ‰ (DHS13-71-1-6 and 1-11, unstable signal, inclusions) excluded, as by the authors. | Su et al. (2016), Using elemental and boron isotopic compositions of tourmaline to trace … |
δ18O in ‰ (per mil) Values of the same system
Standard : V-SMOW
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 8.2 ± 0.4 ‰ | 7.9 / 8.5 ‰ | 2 | stage II apatite Mean and standard deviation recalculated from 2 analyses, +7.9 to +8.5 (DHS14-38 +8.5; DHS14-72 +7.9). Fluid delta18O calculated at 450 C (Zheng, 1991 to 1999): DHS14-38 +8.1; DHS14-72 +7.4 ‰. | Su et al. (2016), Using elemental and boron isotopic compositions of tourmaline to trace … |
| 8.4 ‰ | 1 | stage II actinolite Single analysis (DHS14-106). Fluid delta18O calculated at 450 C (Zheng, 1991 to 1999): DHS14-106 +9.9 ‰. | Su et al. (2016), Using elemental and boron isotopic compositions of tourmaline to trace … | |
| 12.9 ± 0.1 ‰ | 12.8 / 12.9 ‰ | 2 | stage IV quartz Mean and standard deviation recalculated from 2 analyses, +12.8 to +12.9 (DHS14-138 +12.8; DHS15-100 +12.9). Fluid delta18O calculated at 250 C (Zheng, 1991 to 1999): DHS14-138 +3.9; DHS15-100 +3.8 ‰. The two quartz give 3.9 and 3.8 ‰ although the heavier quartz should give the heavier fluid. | Su et al. (2016), Using elemental and boron isotopic compositions of tourmaline to trace … |
Deposits of the same type
- Olympic Dam Australia
- Khetri Copper Belt, Madan Kudan and Kolihan India
- Khetri Copper Belt, Chandmari India
- Singhbhum Copper Belt India
- Olympic Dam Australia
- Kiirunavaara (Kiruna) Sweden
- Grängesberg and Blötberget Sweden
- El Laco Chile
Cite this page
IsoFind Atlas (2026). Dahongshan, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/dahongshan/ (accessed 2026-10-21).
@misc{isofind2026dahongshanisotopesignatures,
title = {Dahongshan, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/dahongshan/},
note = {Accessed 2026-10-21}
}Updated : 2026-10-21