Occurrence of so-called Dushan Jade, which is a mixture of mainly zoisite and anorthite with minor hornblende and subordinate amounts of chrome-bearing minerals such as chromian epidote, chromian micas and volkonskoite, to which it owes its colour. The "jade" occurs as veins in a body of tremolitized gabbro.
A classic Chinese jade occurrence.
Located about 8 km north of Nanyang city.
References
- Jianhong Zhang, Zhaohui Li, and Xuefang Wang (1989): Mineralogical Studies of Jades from Dushan, Nanyang. Acta Petrologica et Mineralogica 8(1).
- Fujian Jiang (2005): Analysis of Dushan Jade Petrology Feature. Journal of Xinyang Normal University (Natural Science Edition), 18(3), 285-288 (in Chinese).
- Qiyun Xiao, Keqin Cai, and Fujian Jiang (2009): Tentative Discussion on the Mineral Cataclasis Jade-forming Process of Dushan Jade in Nanyang City, Henan Province. Acta Geoscientica Sinica 31(5), 607-615.
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