Magma Mixing Texture: Biotite Reaction Rim from Chaoshan Pyroxence Diorite Porphyry in Tongling Area, Anhui, China

摘要：

Tongling area is one of the largest copper and gold mineralization areas related to granitoids in China. There exists a controversy on the evolutionary mechanism of the intrusive rocks in this area. The authors discovered that partially resorbed amphibole phenocrysts are mantled by a reaction rim of biotite, clinopyroxene, feldspar and opaque minerals, in which biotites are inside, clinopyroxenes, feldspar and opaque minerals are outside, in Chaoshan pyroxence monzodiorite porphyry. It is also seen that clinopyroxene phenocrysts have resorbed cores or partially resorbed clinopyroxenes have the same reaction rim as amphibole phenocrysts. It is thought that the coexistence of biotite reaction rim of clinopyroxenxe and amphibole phenocrysts in the same thin section is compatible with the mixing between evolved basaltic magma and trachytic magma rich in K formed in the lower crust Therefore, these phenomena may be a type of magma mixing texture.

关键词： magma mixing texture biotite reaction rim Touting area.

作者: Di Yongjun Wu Ganguo Zhang Da Zhao Hailing Yu Xinqi Zang Wenshuan

作者单位: State Key Laboratory of Geological Processes and Mineral Resources, Beijing 100083, China;School of State Key Laboratory of Geological Processes and Mineral Resources, Beijing 100083, China

会议类型: 国际会议

会议名称: The IPACES 6th Annual Meeting(“现代地球科学，交流与合作国际学术研讨会暨第六届IPACES学术年会)

会议地点: 武汉

会议语种:英文

页码: 262-265

在线出版日期: 2007-04-25（万方平台首次上网日期，不代表论文的发表时间）