Deep xenoliths in alkalic porphyry, Liuhe, Yunnan, and implications to petrogenesis of alkalic porphyry and associated mineralizations |
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| Authors: | Xianfan Liu Xinzhi Zhan Zhenmin Gao Jiajun Liu Chaoyang Li Wenchao Su |
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| Institution: | (1) Open Laboratory of Geochemical Research, Institute of Geochemistry, Chinese Academy of Sciences, 550002 Guiyang, China;(2) Chengdu Institute of Technology, 610059 Chengdu, China |
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| Abstract: | Na-rich microlite-glass is first discovered in deep-source xenoliths in alkali-rich porphyry, Liuhe village, Heqing County,
Yunnan Province. It is shown that the ultramafic xenoliths originated from partial melting of primary mantle and the glass
resulted from metasomatism between the xenoliths and mantle fluid derived from mantle degassing. Mantle metasomatism not only
resulted in the enrichment of alkaline, large-ion elements, ore metals and volatiles but also created a favorable condition
for the generation of alkaline magmas. The mantle xenoliths and their characteristics of mantle metasomatism provide important
evidence for a better understanding of the petrogenesis and mineralization of the Cenozoic alkali-rich porphyry in western
Yunnan. |
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| Keywords: | deep xenoliths mantle metasomatism alkali-rich porphyry petrogenesis and mineralization |
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