MAGNETIC STUDY OF MAGMATIC EMPLACEMENT PROCESS OF FENGHUANGSHAN ROCK BOTY IN ANHUI PROVINCE
Yu Qinfan1, Guo Youzhao2, 3
1. China University of Geosciences, Beijing 100083;
2. Institute of Geophysical and Geochemical Exploration, Ministry of Geology and Mineral Resources, Langfang 065000;
3. Academy of Geophysical and Geochemical Exploration Technique, Anhui Bureau of Geology and Mineral Resources, Hefei 230022;
4. Aerogeophysical Survey and Remote-Sensing Center, Ministry of Geology and Mineral Resources, Beijing 100083
According to magnetic analysis of 302 rock samples from 25 sampling points of Fenghuagshan rock body in Tongling area, Anhui Province, the magnetic fabrics obtaned in the study area can represent flow magnetic fabrics during magmatic emplacement, because they were not considerably influenced by tectonic activity after the formation of magma; the process of magmatic emplacement was a quasi-static process, in which the mobility of magma was rather weak, and the differentiation and assimilation-hybridization were quite strong; the early stage of magmatic emplacement might have been controlled by the NNE-trending maximum principal compressional shear, whereas the late stage was probably conditioned by the southwest maximum principal compressional shear; the southwest part of Fenghuangshan rock body where the Yaoyuanshan ore deposit is located is the hanging wall of the rock body, whereas the northeast part where the Xianrenchong ore deposit is situated is the lying wall of the rock body, suggesting that Fenghuangshan rock body pitches southwestward; in areas adjacent to the southwest part of Fenghuangshan rock body (such as in Lailong Mountain) there might exist small stocks formed in the same period as the emplacement of Fenghuangshan rock body, which are promising areas for ore prospecting.
余钦范, 郭友钊, 曹奋扬, 董金明. 安徽凤凰山岩体岩浆侵位过程的磁性研究[J]. 物探与化探, 1997, 21(3): 203-208.
Yu Qinfan, Guo Youzhao, . MAGNETIC STUDY OF MAGMATIC EMPLACEMENT PROCESS OF FENGHUANGSHAN ROCK BOTY IN ANHUI PROVINCE. Geophysical and Geochemical Exploration, 1997, 21(3): 203-208.
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