Jinshandian
Daye district, Middle-Lower Yangtze River Metallogenic Belt, China
SkarnsFe
- Type
- Iron (magnetite) skarn with scapolite
Proven reserve of 130 Mt at 42.3 % Fe in two large orebodies (Zhangfushan and Yuhuasi) and several small ones, along the southern and western contacts of the Jinshandian pluton (quartz diorite and quartz monzonite, 127 to 132 Ma) with Middle Triassic carbonates holding evaporite horizons (gypsum, halite) and continental clastic rocks. Early stage (garnet, diopside, scapolite, albite, tourmaline), magnetite-scapolite stage, then late stage (pyrite, anhydrite). Zeng et al. (2020): scapolite Cl/Br and early tourmaline delta11B (-5.0 to -3.2 ‰) magmatic, then brines from evaporite dissolution in the magnetite and late stages (Cl/Br 2900 to 6200, apatite 87Sr/86Sr 0.7098 to 0.7109).
δ11B in ‰ (per mil) Values of the same system
Standard : NIST SRM 951
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −4.1 ± 0.6 ‰ | −4.9 / −3.2 ‰ | 8 | early-stage tourmaline (albitised diorite, sample 14JSD-25) Mean and standard deviation recalculated from 8 analyses, -4.9 to -3.2 (14JSD-25-1 -4.6; 14JSD-25-2 -4.9; 14JSD-25-3 -3.9; 14JSD-25-4 -3.6; 14JSD-25-5 -3.2; 14JSD-25-6 -4.6; 14JSD-25-7 -4.3; 14JSD-25-8 -3.5). Published mean -4.1 ± 0.6 ‰ (2σ). Fluid delta11B at 600 C (Meyer et al., 2008) from -3.7 to -1.9 ‰, mean -2.8 ‰. | Zeng et al. (2020), Tracking fluid sources for skarn formation using scapolite geochemist… |
87Sr/86Sr isotope ratio, no unit Values of the same system
Standard : NIST SRM 987
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.71043 ± 0.00037 | 0.70979 / 0.71092 | 31 | hydrothermal fluorapatite of the magnetite stage Mean and standard deviation recalculated from 31 analyses, 0.70979 to 0.71092 (14JSD-53-1 0.71043; 14JSD-53-2 0.70990; 14JSD-53-3 0.70987; 14JSD-53-4 0.71092; 14JSD-53-5 0.71085; 14JSD-53-6 0.70999; 14JSD-53-7 0.71029; 14JSD-53-8 0.71067; 14JSD-79-1 0.71032; 14JSD-79-2 0.70998; 14JSD-79-3 0.70979; 14JSD-79-4 0.70992; 14JSD-79-5 0.70984; 14JSD-79-6 0.70991; 14JSD-60-1 0.71050; 14JSD-60-2 0.71069; 14JSD-60-3 0.71020; 14JSD-60-4 0.71070; 14JSD-60-5 0.71020; 14JSD-60-6 0.71075; 14JSD-60-7 0.71071; 14JSD-60-8 0.71077; 14JSD-60-9 0.71080; 14JSD-60-10 0.71043; 14JSD-60-11 0.71087; 14JSD-60-12 0.71068; 14JSD-60-13 0.71060; 14JSD-60-14 0.71082; 14JSD-60-15 0.71043; 14JSD-60-16 0.71075; 14JSD-60-17 0.71066). Electronic Supplementary Table 5, values rounded here to 0.00001. Sample means: 14JSD-53 0.71037 (n = 8); 14JSD-79 0.70996 (n = 6); 14JSD-60 0.71062 (n = 17). Well above the skarn-related intrusions (0.7058 to 0.7061) and close to Middle Triassic seawater (0.7075 to 0.7085). | Zeng et al. (2020), Tracking fluid sources for skarn formation using scapolite geochemist… |
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Cite this page
IsoFind Atlas (2026). Jinshandian, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/jinshandian/ (accessed 2026-10-21).
@misc{isofind2026jinshandianisotopesignatures,
title = {Jinshandian, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/jinshandian/},
note = {Accessed 2026-10-21}
}Updated : 2026-10-21