Donggebi
Xinjiang, East Tianshan, Kanggur basin, China
PorphyriesMo
- Type
- Porphyry molybdenum
Porphyry molybdenum deposit (proven reserve 0.406 Mt Mo metal at 0.12 %) related to a 236 ± 2.2 Ma (U-Pb) porphyritic granite, molybdenite dated at 234 to 231 Ma (Re-Os), hosted by clastic rocks of the Gandun Formation. Wu et al. (2023): tourmalines from -15.9 to -12.3 ‰ according to Table 3, close to S-type granites or clastic-sediment-sourced fluids; fluids increasingly oxidized as sulphides precipitated.
δ11B in ‰ (per mil) Values of the same system
Standard : NIST SRM 951
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −13.1 ± 1 ‰ | −14.9 / −12.3 ‰ | 8 | disseminated tourmaline of the porphyritic granite (PG) Mean and standard deviation recalculated from 8 analyses, -14.9 to -12.3 (-12.9; -12.6; -12.3; -12.7; -12.3; -14.9; -14.6; -12.7). The text gives -14.9 to -13.0 ‰ (8 analyses), slightly different from the table. | Wu et al. (2023), Chemistry and boron isotope composition of tourmaline as a robust tool … |
| −14.5 ± 0.7 ‰ | −15.9 / −13.3 ‰ | 33 | hydrothermal tourmalinite in the host strata (TS) Mean and standard deviation recalculated from 33 analyses, -15.9 to -13.3 (-13.5; -13.9; -13.4; -13.9; -14.3; -14.7; -14.9; -14.4; -14.3; -14.0; -14.1; -13.9; -14.5; -15.4; -15.8; -14.6; -15.4; -14.6; -15.0; -15.6; -14.7; -15.0; -14.8; -14.4; -14.4; -15.0; -15.9; -14.2; -14.1; -13.9; -13.3; -13.4; -14.0). The text gives -15.9 to -13.3 ‰ (33 analyses, 6 samples), as in the table. | Wu et al. (2023), Chemistry and boron isotope composition of tourmaline as a robust tool … |
| −13.7 ± 0.6 ‰ | −14.9 / −12.5 ‰ | 48 | tourmaline of quartz-molybdenite veins (V1) Mean and standard deviation recalculated from 48 analyses, -14.9 to -12.5 (-14.6; -12.6; -13.6; -14.6; -13.9; -12.8; -13.2; -14.3; -14.1; -14.1; -14.3; -13.2; -13.4; -13.6; -14.8; -13.3; -13.6; -13.3; -14.1; -13.5; -13.0; -14.2; -13.7; -14.2; -14.9; -14.3; -13.5; -14.6; -14.1; -14.7; -14.7; -14.2; -13.8; -13.1; -13.8; -13.0; -13.9; -13.6; -13.5; -12.9; -13.9; -13.6; -13.7; -13.2; -12.5; -13.1; -13.4; -13.8). The text gives -14.8 to -12.5 ‰ (47 analyses, 5 samples), slightly different from the table. | Wu et al. (2023), Chemistry and boron isotope composition of tourmaline as a robust tool … |
| −13.4 ± 0.6 ‰ | −14.4 / −12.6 ‰ | 14 | tourmaline of quartz-polymetallic sulphide veins (V2) Mean and standard deviation recalculated from 14 analyses, -14.4 to -12.6 (-13.2; -13.4; -13.1; -13.5; -13.3; -14.3; -12.6; -12.7; -13.2; -12.8; -13.7; -14.4; -13.6; -14.1). The text gives -14.3 to -12.6 ‰ (14 analyses, 2 samples), slightly different from the table. | Wu et al. (2023), Chemistry and boron isotope composition of tourmaline as a robust tool … |
| −13.8 ± 0.6 ‰ | −15.1 / −12.6 ‰ | 19 | tourmaline of late quartz-calcite-fluorite veins (V3) Mean and standard deviation recalculated from 19 analyses, -15.1 to -12.6 (-13.8; -12.6; -14.0; -13.7; -13.6; -13.3; -13.4; -14.2; -14.3; -13.8; -13.8; -14.9; -13.6; -14.0; -15.1; -13.6; -13.7; -13.8; -13.4). The text gives -14.9 to -12.6 ‰ (19 analyses, 3 samples), slightly different from the table. | Wu et al. (2023), Chemistry and boron isotope composition of tourmaline as a robust tool … |
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Cite this page
IsoFind Atlas (2026). Donggebi, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/donggebi/ (accessed 2026-10-19).
@misc{isofind2026donggebiisotopesignatures,
title = {Donggebi, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/donggebi/},
note = {Accessed 2026-10-19}
}Updated : 2026-10-19