Abstract
The Yinyan tin-bearing granites are composite. They yield a K-Ar age of about 92 Ma, therefore they appear to be late Yenshanian. They are oversatured, peralkaline and rich in fluorine, tin, molybdenum and bismuth. They have a REE pattern which is similar to the S-type granites of south China. Explosive volcanic phenomena can generally be seen at the top of granites.
Orebodies occur at the upper part of these granites, which have the shape of an inverted cup. Ore minerals are mainly major cassiterite and subordinate wolframite, bismuthinite and molybdenite. Ores are characterized by a hypidiomorphic texture and veinlet-impregnation structure. Four alteration zones can be recognized: (1) chlorite hornfels zone; (2) topaz-greisen zone, which forms the main portion of mineralization; (3) the incorporated potassium-silicate zone; and (4) the potash-silicate zone. Fluid inclusion study has demonstrated that the temperature at the time of mineralization varied from 160 to 360° C.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
Guiyang Institute of Geochemistry, Academia Sinica, 1979. Geochemistry of Granite in South China. Science Press (in Chinese).
Guo Wnkuei, 1982. On Granitoids Relevant to Metallogeny, Regional Geology of China, No. 2, 15–30 (in Chinese).
Li Xinqing, Rui Zongyao and Cheng Laixian, 1981. Fluid Inclusions and Mineralization of the Yulong Porphyry Copper (Molybdenum) deposit. Acta Geologica Sinica, Vol. 55, No. 3, 216–231 (in Chinese).
Rui Zongao, Huang Chongke, Xu Jue and Qi Guoming, 1982. Discrimination Between Ore-bearing Porphyry and Barren Porphyry from Fluid Inclusions in the Yu Long Porphyry Copper (Molybdenum) Deposit Belt of the Eastern Tibet Autonomous Region, Bulletin of the Insitute of Mineral Deposits, Chinese Academy of Geological Sciences, No. 2, 159–174 (in Chinese).
Zhu Xun, Huang Chongke, Rui Zongyao, Zhou Yaohua, Zhu Xianjia, Hu Congsheng and Mei Zhankui, 1983. The geology of the Dexing Porphyry Copper Ore Field, Geological Publishing House (in Chinese).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1988 United Nations New York
About this paper
Cite this paper
Xunfan, G., Yongqin, S., Jinghua, X., Shuzhao, L., Jinmao, L. (1988). A New Type of Tin Deposit — The Yinyan Porphyry Tin Deposit in China. In: Hutchison, C.S. (eds) Geology of Tin Deposits in Asia and the Pacific. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-72765-8_38
Download citation
DOI: https://doi.org/10.1007/978-3-642-72765-8_38
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-72767-2
Online ISBN: 978-3-642-72765-8
eBook Packages: Springer Book Archive