Gaobanhe
Hebei, Yan-Liao rift basin (Xinglong), North China Craton, China
SEDEXpyrite, Zn, Pb
- Type
- Polymetallic pyrite SEDEX (Zn-Pb) in dolostones of the Gaoyuzhuang Formation (early Mesoproterozoic)
Ten orebodies in the Guandiya, Sangshu'an and Zhangjiayu sub-formations, mostly in members 4 and 5; pyrite makes up about 80 % of the sulphides. Re-Os isochron of syn-depositional pyrite: 1505 ± 55 Ma (Gao et al., 2020). Coordinates not published.
187Os/188Os isotope ratio, no unit Values of the same system
Standard : Rapport absolu, sans standard de référence
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 2.106 ± 1.167 | 0.7899 / 3.624 | 5 | syn-depositional colloform pyrite (present-day ratio) Mean and standard deviation recalculated from 5 analyses, 0.7899 to 3.624 (TFJ-HS-1 0.7899; TFJ-HS-3 2.024; TFJ-HS-5 2.880; TFJ-HS-7 1.210; TFJ-HS-10 3.624). Isochron of these five pyrites: 1495 ± 63 Ma, Osi 0.212 ± 0.082, MSWD 0.67. Detail: TFJ-HS-1: Re 149.1 ppt, common Os 31.82 ppt, 187Re/188Os 22.63, ± 0.0942; TFJ-HS-3: Re 136.8 ppt, common Os 9.013 ppt, 187Re/188Os 73.31, ± 0.078; TFJ-HS-5: Re 73.59 ppt, common Os 3.432 ppt, 187Re/188Os 103.6, ± 0.079; TFJ-HS-7: Re 73.43 ppt, common Os 8.954 ppt, 187Re/188Os 39.61, ± 0.052; TFJ-HS-10: Re 243 ppt, common Os 8.599 ppt, 187Re/188Os 136.5, ± 0.086. | Gao et al. (2020), Rhenium-Osmium isotope systematics of an Early Mesoproterozoic SEDEX p… |
| 1.887 ± 0.429 | 1.076 / 2.593 | 9 | syn-depositional laminated pyrite (present-day ratio) Mean and standard deviation recalculated from 9 analyses, 1.076 to 2.593 (TFJ-1 2.092; TFJ-3 1.863; TFJ-5 2.176; TFJ-8 2.089; TFJ-10 1.076; TFJ-12 2.593; TFJ-13 1.769; TFJ-15 1.794; TFJ-16 1.531). Isochron of these nine pyrites: 1532 ± 110 Ma, Osi 0.14 ± 0.13, MSWD 1.6. Detail: TFJ-1: Re 192.2 ppt, common Os 12.66 ppt, 187Re/188Os 73.29, ± 0.11; TFJ-3: Re 224.9 ppt, common Os 16.82 ppt, 187Re/188Os 64.57, ± 0.099; TFJ-5: Re 239.2 ppt, common Os 13.7 ppt, 187Re/188Os 84.3, ± 0.093; TFJ-8: Re 230.1 ppt, common Os 14.08 ppt, 187Re/188Os 78.96, ± 0.11; TFJ-10: Re 259.1 ppt, common Os 34.9 ppt, 187Re/188Os 35.86, ± 0.066; TFJ-12: Re 628.4 ppt, common Os 32.84 ppt, 187Re/188Os 92.43, ± 0.077; TFJ-13: Re 226 ppt, common Os 17.5 ppt, 187Re/188Os 62.39, ± 0.056; TFJ-15: Re 309.1 ppt, common Os 23.2 ppt, 187Re/188Os 64.35, ± 0.126; TFJ-16: Re 226.8 ppt, common Os 19.71 ppt, 187Re/188Os 55.59, ± 0.033. | Gao et al. (2020), Rhenium-Osmium isotope systematics of an Early Mesoproterozoic SEDEX p… |
| 0.181 | 1 | syn-depositional pyrite, initial ratio (14-point isochron at 1505 Ma) Single analysis (isochrone). Osi 0.181 ± 0.066, MSWD 1.2; mixture of seawater and hydrothermal fluid, Os mostly from seawater according to the authors. | Gao et al. (2020), Rhenium-Osmium isotope systematics of an Early Mesoproterozoic SEDEX p… |
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 14.606 ± 0.726 ‰ | 13.897 / 15.783 ‰ | 5 | syn-depositional colloform pyrite Mean and standard deviation recalculated from 5 analyses, +13.897 to +15.783 (TFJ-HS-1 +14.663; TFJ-HS-3 +14.144; TFJ-HS-5 +14.541; TFJ-HS-7 +15.783; TFJ-HS-10 +13.897). The text swaps the ranges of the two pyrite types (laminated +5.0 to +15.8 ‰, colloform +6.7 to +15.4 ‰) relative to Table 3, which is followed here. | Gao et al. (2020), Rhenium-Osmium isotope systematics of an Early Mesoproterozoic SEDEX p… |
| 11.253 ± 2.729 ‰ | 6.717 / 15.483 ‰ | 9 | syn-depositional laminated pyrite Mean and standard deviation recalculated from 9 analyses, +6.717 to +15.483 (TFJ-1 +9.029; TFJ-3 +15.483; TFJ-5 +11.923; TFJ-8 +6.717; TFJ-10 +10.096; TFJ-12 +11.675; TFJ-13 +13.134; TFJ-15 +13.890; TFJ-16 +9.329). The text swaps the ranges of the two pyrite types (laminated +5.0 to +15.8 ‰, colloform +6.7 to +15.4 ‰) relative to Table 3, which is followed here. | Gao et al. (2020), Rhenium-Osmium isotope systematics of an Early Mesoproterozoic SEDEX p… |
Deposits of the same type
- Red Dog United States
- McArthur River (HYC) Australia
- Sullivan Canada
- Red Dog (Anarraaq, Wulik) United States
- Wusihe China
- Langshan China
- Rajpura-Dariba India
- Aulus-les-Bains district France
Cite this page
IsoFind Atlas (2026). Gaobanhe, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/gaobanhe/ (accessed 2026-10-21).
@misc{isofind2026gaobanheisotopesignatures,
title = {Gaobanhe, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/gaobanhe/},
note = {Accessed 2026-10-21}
}Updated : 2026-10-21