Largest witherite producer in China.
Ref.:
- Jiao Shu-pei (1995): Formation conditions and genesis of the Bashan superlarge barium deposit, Chengkou County, Sichuan. Geotectonia et Metallogenia 18(3), 240-241 (in Chinese).
- Duanmu He-sun (1999): The geologic feature of Sinian witherite mineralized belt in Zhenba-Chengkou. Journal of Xi'an Mining Institute 19(4), 329-332 (in Chinese with English abstract).