Yashan (Yichun Ta-Nb-Li deposit)
Western Jiangxi, Yichun, China
Magmatic (Ni-Cu-PGE, carbonatites)Ta-Nb (Li)
- Type
- Topaz-lepidolite rare-metal granite
Yashan pluton (Yichun granites), a lithium- and fluorine-rich rare-metal granite whose Li-mica and topaz-lepidolite units host the Ta-Nb-Li mineralisation. Although lithium rises from 89 to 8080 µg/g, whole-rock δ7Li stays between -1.5 and +1.5 ‰: closed-system magmatic differentiation barely fractionates lithium.
δ7Li in ‰ (per mil) Values of the same system
Standard : L-SVEC
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −1.3 ‰ | −1.3 / −1.3 ‰ | 2 | whole rock, protolithionite granite Mean and standard deviation recalculated from 2 samples, Table 2. External reproducibility ± 1.0 ‰ (2 SD); most samples were analysed only once. | Li et al. (2018), Lithium isotope fractionation during magmatic differentiation and hydro… |
| −1 ± 0.71 ‰ | −1.5 / −0.5 ‰ | 2 | whole rock, Li-mica granite Mean of 2 samples, each the mean of two repeated analyses, Table 2. External reproducibility ± 1.0 ‰ (2 SD); most samples were analysed only once. | Li et al. (2018), Lithium isotope fractionation during magmatic differentiation and hydro… |
| 1.3 ± 0.28 ‰ | 1.1 / 1.5 ‰ | 2 | whole rock, topaz-lepidolite granite (Ta-Nb-Li ore) Mean of 2 samples (YC10-10: mean of 1.4 and 0.8 ‰), Table 2; Li 7430 and 8080 µg/g. External reproducibility ± 1.0 ‰ (2 SD); most samples were analysed only once. | Li et al. (2018), Lithium isotope fractionation during magmatic differentiation and hydro… |
| 13.96 ± 5.07 ‰ | 9.7 / 19.8 ‰ | 5 | quartz from the granites Mean and standard deviation recalculated from 5 samples, Table 3. | Li et al. (2018), Lithium isotope fractionation during magmatic differentiation and hydro… |
| −0.28 ± 1.63 ‰ | −2 / 2 ‰ | 5 | micas from the granites (protolithionite, Li-mica, lepidolite) Mean and standard deviation recalculated from 5 samples, Table 3. Lepidolite from the topaz granites: +0.8 and +2.0 ‰, Li 35,500 and 54,500 µg/g. | Li et al. (2018), Lithium isotope fractionation during magmatic differentiation and hydro… |
| 2.08 ± 1.54 ‰ | −0.4 / 3.6 ‰ | 5 | feldspars from the granites Mean and standard deviation recalculated from 5 samples, Table 3. | Li et al. (2018), Lithium isotope fractionation during magmatic differentiation and hydro… |
Deposits of the same type
- Renli-Chuanziyuan (Mufushan batholith) China
- Tong'an-Baishuidong lithium district (Wutang granites) China
- Jiajika, No. X03 vein China
- Bayan Obo China
- Jinchuan China
- Piaohechuan (No. 4 intrusion) China
- Luobusa China
- Bailongshan China
Cite this page
IsoFind Atlas (2026). Yashan (Yichun Ta-Nb-Li deposit), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/yashan-gisement-de-ta-nb-li-de-yichun/ (accessed 2026-10-13).
@misc{isofind2026yashanyichuntanblidepositisot,
title = {Yashan (Yichun Ta-Nb-Li deposit), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/yashan-gisement-de-ta-nb-li-de-yichun/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13