Shangbao (Nb-Ta)
Southern Hunan, Nanling Range, China
Magmatic (Ni-Cu-PGE, carbonatites)Nb-Ta
- Type
- Nb-Ta-bearing monzogranite
Highly fractionated A-type monzogranite (main stock 1.45 km², zircon dated at 80.01 ± 0.4 Ma), with 46 Nb-Ta orebodies and W-Sn and pyrite deposits around the pluton; abundant tourmaline (fluor-schorl). Zhao et al. (2021): disseminated and nodular tourmaline from -17.16 to -14.81 ‰, same boron source; vein tourmaline slightly heavier by Rayleigh fractionation.
δ11B in ‰ (per mil) Values of the same system
Standard : NIST SRM 951
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −16.48 ± 0.51 ‰ | −17.16 / −15.5 ‰ | 10 | disseminated tourmaline of the monzogranite (TD) Mean and standard deviation recalculated from 10 analyses, -17.16 to -15.50 (BJ01-1 -16.25; BJ01-2 -16.48; BJ02-1 -15.50; BJ02-2 -16.41; BJ02-3 -16.73; BJ02-1 -15.87; BJ02-2 -17.05; BJ02-3 -16.49; BJ03-1 -17.16; BJ03-2 -16.83). | Zhao et al. (2021), In-situ boron isotopic and geochemical compositions of tourmaline fro… |
| −15.76 ± 0.53 ‰ | −16.62 / −14.93 ‰ | 10 | yellow core of tourmaline nodules (TNy) Mean and standard deviation recalculated from 10 analyses, -16.62 to -14.93 (BH01-1 -16.30; BH01-3 -16.41; BH01-5 -15.52; BH02-1 -14.93; BH02-3 -15.43; BH02-5 -15.77; BH03-1 -15.67; BH03-3 -16.62; BH03-5 -15.27; BH03-7 -15.71). | Zhao et al. (2021), In-situ boron isotopic and geochemical compositions of tourmaline fro… |
| −15.37 ± 0.45 ‰ | −16.36 / −14.81 ‰ | 10 | blue rim of tourmaline nodules (TNb) Mean and standard deviation recalculated from 10 analyses, -16.36 to -14.81 (BH01-2 -15.82; BH01-4 -15.18; BH01-6 -15.54; BH02-2 -16.36; BH02-4 -15.13; BH02-6 -15.47; BH03-2 -14.81; BH03-4 -15.11; BH03-6 -15.23; BH03-8 -15.04). | Zhao et al. (2021), In-situ boron isotopic and geochemical compositions of tourmaline fro… |
| −13.98 ± 0.4 ‰ | −14.6 / −13.46 ‰ | 10 | hydrothermal vein tourmaline (TV) Mean and standard deviation recalculated from 10 analyses, -14.60 to -13.46 (BM01-1 -14.23; BM01-2 -13.64; BM01-3 -14.48; BM01-4 -14.09; BM02-1 -14.60; BM02-2 -13.54; BM02-3 -14.17; BM03-1 -13.68; BM03-2 -13.95; BM03-3 -13.46). | Zhao et al. (2021), In-situ boron isotopic and geochemical compositions of tourmaline fro… |
Deposits of the same type
Cite this page
IsoFind Atlas (2026). Shangbao (Nb-Ta), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/shangbao-nb-ta/ (accessed 2026-10-20).
@misc{isofind2026shangbaonbtaisotopesignatures,
title = {Shangbao (Nb-Ta), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/shangbao-nb-ta/},
note = {Accessed 2026-10-20}
}Updated : 2026-10-20