Yindongzi-Tongmugou

Shaanxi, eastern Qinling, China

SEDEXPb-Zn-Ag

Type: Stratiform Pb-Zn(-Ag) in a Devonian rift (sedimentary exhalative)

Stratiform and stratabound sulphide bodies of a Devonian rift basin, hosted by clastic sediments and possibly altered tuffites; tourmaline in banded jaspers, albitites, scapolite-biotite rocks and quartz-tourmaline veins. Highly chlorine-rich minerals (scapolite, biotite, hornblende): saline brines or former evaporites in the host rocks. Fluid inclusions at 160 to 230 °C (Zhang et al., 1989). Jiang (2001): tourmalines from -8.8 to -7.6 ‰, calculated fluid +4 to +6 ‰, no marine evaporites; non-marine evaporites possible. Coordinates not published.

δ11B in ‰ (per mil) Values of the same system

Standard : NIST SRM 951

Value	Range	n	Mineral or matrix	Source
−7.6 ‰		1	tourmaline in footwall banded jasper (Yindongzi mine) Single analysis (92Ag-10).	Jiang (2001), Boron isotope geochemistry of hydrothermal ore deposits in China: a prelimi…
−8.5 ± 0.3 ‰	−8.8 / −8.2 ‰	3	tourmaline from quartz-tourmaline veins in footwall albitites (Tongmugou mine) Mean and standard deviation recalculated from 3 analyses, -8.8 to -8.2 (92Zn-20 -8.2; 92Zn-21A -8.5; 92Zn-21B -8.8). Calculated hydrothermal fluid +4 to +6 ‰ at 160-230 °C.	Jiang (2001), Boron isotope geochemistry of hydrothermal ore deposits in China: a prelimi…

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Cite this page

IsoFind Atlas (2026). Yindongzi-Tongmugou, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/yindongzi-tongmugou/ (accessed 2026-10-19).

@misc{isofind2026yindongzitongmugouisotopesign,
  title = {Yindongzi-Tongmugou, isotope signatures},
  author = {{IsoFind Atlas}},
  year = {2026},
  url = {https://www.isofind.tech/isotopes/en/deposits/yindongzi-tongmugou/},
  note = {Accessed 2026-10-19}
}

Updated : 2026-10-19