Zhunuo-Beimulang
Tibet, western Gangdese belt (southern Lhasa subterrane), China
PorphyriesCu-Mo
- Type
- Collision-related porphyry copper (Cu-Mo)
Westernmost porphyry system of the Gangdese, about 5 Mt of metal at 0.5 % Cu on average, not mined. Monzogranite porphyry (14.8 ± 0.2 Ma) and monzogranite (14.1 ± 0.2 Ma) coeval with mineralization, with diorite porphyry enclaves and dykes (13.1 ± 0.2 Ma); abundant tourmaline as disseminations and veinlets. Zheng et al. (2024): three tourmaline generations from -10.5 to -5.1 ‰, mixing of an oxidized dioritic magma and a granitic magma.
δ11B in ‰ (per mil) Values of the same system
Standard : NIST SRM 951
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −9.15 ± 0.43 ‰ | −9.9 / −8.59 ‰ | 11 | disseminated tourmaline of the monzogranite porphyry (Tur-1, pre-ore) Mean and standard deviation recalculated from 11 analyses, -9.90 to -8.59 (ZK0202-104.48-01 -9.23; ZK0202-104.48-02 -9.10; ZK0202-104.48-03 -8.83; ZK0202-104.48-04 -8.75; ZK0202-104.48-05 -8.86; ZK0202-104.48-07 -9.90; ZK0202-104.48-08 -9.35; ZK0202-104.48-09 -9.88; ZK0202-104.48-12 -8.59; ZK0202-104.48-13 -9.19; ZK0202-104.48-15 -9.01). Slight decrease from core to rim. | Zheng et al. (2024), Magma mixing and magmatic-to-hydrothermal fluid evolution revealed b… |
| −7.21 ± 1.01 ‰ | −9.71 / −5.09 ‰ | 22 | porphyritic tourmaline of diorite porphyry enclaves and dykes (Tur-2) Mean and standard deviation recalculated from 22 analyses, -9.71 to -5.09 (ZK002-93.3-03 -7.02; ZK002-93.3-04 -6.80; ZK002-93.3-05 -6.90; ZK002-93.3-06 -7.33; ZK002-93.3-07 -7.16; ZK002-93.3-08 -7.75; ZK002-93.3-09 -7.44; ZK002-93.3-10 -8.02; ZK002-93.3-12 -7.78; ZK002-93.3-13 -7.58; ZK002-155.6-01 -9.71; ZK002-155.6-02 -8.64; ZK002-155.6-03 -8.22; ZK002-155.6-04 -6.63; ZK002-155.6-05 -7.99; ZK002-155.6-06 -7.07; ZK002-155.6-07 -6.67; ZK002-155.6-08 -6.49; ZK002-155.6-09 -6.06; ZK002-155.6-10 -5.62; ZK002-155.6-11 -5.09; ZK002-155.6-12 -6.74). | Zheng et al. (2024), Magma mixing and magmatic-to-hydrothermal fluid evolution revealed b… |
| −9.53 ± 0.41 ‰ | −10.11 / −9.05 ‰ | 5 | hydrothermal tourmaline around Tur-1 (Tur-3-a) Mean and standard deviation recalculated from 5 analyses, -10.11 to -9.05 (ZK0202-104.48-06 -9.05; ZK0202-104.48-10 -9.34; ZK0202-104.48-11 -9.73; ZK0202-104.48-14 -10.11; ZK0202-104.48-16 -9.40). The text gives -10.1 to -9.0 ‰, Table 1 -10.1 to -9.1 ‰; the highest value of Table S3 is -9.049 ‰. | Zheng et al. (2024), Magma mixing and magmatic-to-hydrothermal fluid evolution revealed b… |
| −7.73 ± 0.59 ‰ | −8.16 / −7.06 ‰ | 3 | hydrothermal tourmaline around Tur-2 (Tur-3-b) Mean and standard deviation recalculated from 3 analyses, -8.16 to -7.06 (ZK002-93.3-01 -7.06; ZK002-93.3-02 -7.98; ZK002-93.3-11 -8.16). | Zheng et al. (2024), Magma mixing and magmatic-to-hydrothermal fluid evolution revealed b… |
| −8.35 ± 1.01 ‰ | −10.52 / −6.01 ‰ | 47 | veinlet and disseminated tourmaline with chalcopyrite (Tur-3-c, main ore stage) Mean and standard deviation recalculated from 47 analyses, -10.52 to -6.01 (ZK002-93.3-14 -10.32; ZK002-93.3-15 -10.08; ZK002-93.3-16 -9.51; ZK002-93.3-17 -10.40; ZK002-93.3-18 -9.41; ZK002-93.3-19 -10.52; ZK002-93.3-20 -9.43; ZK002-93.3-21 -6.55; ZK002-93.3-22 -8.59; ZK002-93.3-23 -9.06; ZK0201-28.3-01 -8.32; ZK0201-28.3-02 -8.27; ZK0201-28.3-03 -8.93; ZK0201-28.3-04 -8.43; ZK0201-28.3-05 -8.84; ZK0201-28.3-06 -8.81; ZK0201-28.3-07 -7.98; ZK0201-28.3-08 -7.50; ZK0201-28.3-09 -8.51; ZK0201-28.3-10 -7.24; ZK0201-29.5-01 -7.72; ZK0201-29.5-02 -7.47; ZK0201-29.5-03 -7.73; ZK0201-29.5-04 -7.87; ZK0201-29.5-05 -7.09; ZK0201-29.5-06 -6.01; ZK0201-29.5-07 -8.24; ZK0201-29.5-08 -8.11; ZK0201-29.5-09 -7.35; ZK0201-29.5-10 -8.68; ZK0201-29.5-11 -8.41; ZK0201-29.5-12 -6.03; ZK0701-49.4-01 -9.19; ZK0701-49.4-02 -8.75; ZK0701-49.4-03 -8.63; ZK0701-49.4-04 -8.57; ZK0701-49.4-05 -6.82; ZK0701-49.4-06 -7.41; ZK0701-49.4-07 -8.39; ZK0701-49.4-08 -8.78; ZK0701-49.4-09 -8.92; ZK0701-49.4-10 -8.07; ZK0701-49.4-11 -7.43; ZK0701-49.4-12 -8.50; ZK0701-49.4-13 -8.31; ZK0701-49.4-14 -8.58; ZK0701-49.4-15 -8.65). Samples ZK0201-28.3, ZK0201-29.5, ZK0701-49.4 and ZK002-93.3. The discussion gives Tur-3 a range of -11.4 to -8.5 ‰, inconsistent with the data. | Zheng et al. (2024), Magma mixing and magmatic-to-hydrothermal fluid evolution revealed b… |
| −8.76 ± 0.47 ‰ | −9.31 / −8.26 ‰ | 5 | late-magmatic tourmaline 1 (Tur1-M, ZK0202-105) Mean and standard deviation recalculated from 5 analyses, -9.31 to -8.26 (ZK0202-105-1 -8.93; ZK0202-105-2 -9.31; ZK0202-105-3 -9.02; ZK0202-105-4 -8.29; ZK0202-105-5 -8.26). Published mean -8.8 ‰. Monzogranite crystallized near 690 °C (zircon): modelled magma near -10.3 ‰. | Wu et al. (2026), Tourmaline chemistry and boron isotopes record multistage magmatic-hydr… |
| −7.22 ± 0.63 ‰ | −8.04 / −6.35 ‰ | 12 | tourmaline 2 of the magmatic-hydrothermal transition (Tur2-O, orbicules, ZK01-395) Mean and standard deviation recalculated from 12 analyses, -8.04 to -6.35 (ZK01-395-1 -7.91; ZK01-395-2 -7.77; ZK01-395-3 -7.51; ZK01-395-4 -7.70; ZK01-395-5 -6.35; ZK01-395-6 -7.13; ZK01-395-7 -6.70; ZK01-395-8 -7.61; ZK01-395-9 -7.09; ZK01-395-10 -6.40; ZK01-395-11 -6.38; ZK01-395-12 -8.04). Published mean -7.2 ‰. | Wu et al. (2026), Tourmaline chemistry and boron isotopes record multistage magmatic-hydr… |
| −8.57 ± 0.35 ‰ | −9.17 / −8 ‰ | 12 | tourmaline 3 of potassic veins (Tur3-Po, ZK0801-240), associated with copper Mean and standard deviation recalculated from 12 analyses, -9.17 to -8.00 (ZK0801-240-1 -8.84; ZK0801-240-2 -8.00; ZK0801-240-3 -8.28; ZK0801-240-4 -8.17; ZK0801-240-5 -8.29; ZK0801-240-6 -8.84; ZK0801-240-7 -8.92; ZK0801-240-8 -9.17; ZK0801-240-9 -8.72; ZK0801-240-10 -8.48; ZK0801-240-11 -8.45; ZK0801-240-12 -8.73). Published mean -8.6 ‰. Modelled fluid near -5.8 ‰ at 390 °C (fluid inclusions of the nearby Zhunuo deposit). | Wu et al. (2026), Tourmaline chemistry and boron isotopes record multistage magmatic-hydr… |
| −6.69 ± 0.75 ‰ | −7.72 / −5.21 ‰ | 7 | tourmaline 4 cementing the tourmaline breccia (Tur4-B, ZK0003-150) Mean and standard deviation recalculated from 7 analyses, -7.72 to -5.21 (ZK0003-150-1 -6.81; ZK0003-150-2 -6.68; ZK0003-150-3 -7.06; ZK0003-150-4 -5.21; ZK0003-150-5 -6.64; ZK0003-150-6 -6.73; ZK0003-150-7 -7.72). Published mean -6.7 ‰. Heaviest values; modelled fluid near -3.6 ‰ at 365 °C, after removal of about 50 % of the boron (Rayleigh). | Wu et al. (2026), Tourmaline chemistry and boron isotopes record multistage magmatic-hydr… |
| −7.3 ± 1.2 ‰ | −9.79 / −5.72 ‰ | 20 | tourmaline 5 of the propylitic alteration (Tur5-Pr, ZK0001-70 and ZK001-30) Mean and standard deviation recalculated from 20 analyses, -9.79 to -5.72 (ZK0001-70-1 -6.37; ZK0001-70-2 -6.54; ZK0001-70-3 -5.72; ZK0001-70-4 -5.81; ZK0001-70-5 -6.50; ZK0001-70-6 -6.51; ZK0001-70-7 -7.22; ZK0001-70-8 -6.72; ZK0001-70-9 -6.35; ZK0001-70-10 -5.98; ZK001-30-1 -9.51; ZK001-30-2 -7.53; ZK001-30-3 -7.26; ZK001-30-4 -9.79; ZK001-30-5 -9.49; ZK001-30-6 -7.71; ZK001-30-7 -7.59; ZK001-30-8 -7.95; ZK001-30-9 -7.62; ZK001-30-10 -7.81). Published mean -7.3 ‰. Ca-Ti-Sr-rich; input of light diorite-related boron according to the authors. ZK0001-70 from -7.22 to -5.72 ‰, ZK001-30 from -9.79 to -7.26 ‰. | Wu et al. (2026), Tourmaline chemistry and boron isotopes record multistage magmatic-hydr… |
| −9.02 ± 0.69 ‰ | −10.07 / −8.04 ‰ | 17 | tourmaline 6 of the phyllic alteration (Tur6-Ph), associated with copper Mean and standard deviation recalculated from 17 analyses, -10.07 to -8.04 (ZK01-228-1 -8.52; ZK01-228-2 -9.48; ZK01-228-3 -10.07; ZK01-228-4 -8.51; ZK01-228-5 -8.65; ZK01-228-6 -8.34; ZK01-228-7 -9.05; ZK01-228-8 -8.04; ZK01-228-9 -8.73; ZK01-228-10 -8.14; ZK01-228-11 -8.25; 105-1 -9.32; 105-2 -8.93; 105-3 -9.60; 105-4 -9.89; 105-5 -9.92; 105-6 -9.87). Published mean -9.0 ‰. Renewed felsic magmatic fluid input, near 280 °C. Eleven ZK01-228 analyses and six labelled only "105-1" to "105-6" in the appendix, with no drill-hole reference. | Wu et al. (2026), Tourmaline chemistry and boron isotopes record multistage magmatic-hydr… |
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Cite this page
IsoFind Atlas (2026). Zhunuo-Beimulang, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/zhunuo-beimulang/ (accessed 2026-10-20).
@misc{isofind2026zhunuobeimulangisotopesignatu,
title = {Zhunuo-Beimulang, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/zhunuo-beimulang/},
note = {Accessed 2026-10-20}
}Updated : 2026-10-20