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| Analysis of fault characteristics of Gaosong ore field in Gejiu Tin Deposit |
| Received:January 06, 2020 Revised:February 16, 2020 |
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| DOI： |
| KeyWord:conjugate joints;fault structural feature;tectonic stress;tectonic movement; Gasong ore fields |
| Author | Institution |
| ZHENG Dezhi |
昆明理工大学 |
| YANG Rongsen |
昆明理工大学 |
| TIAN Yuan |
昆明理工大学 |
| NI Chunzhong |
昆明理工大学 |
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| Abstract: |
| According to the observation of the geometric features of the structural plane, kinematic properties of the F7 fault in the gaosong ore field mine and the statistics and measurements of the joints in the nearby area,it is shown that the F7 fault is a right torsional reverse fault, and the development characteristics of the joints in the area around the F7 fault in the study area are summarized, the dominant joint inclination is SE130°± 5°and NW310°±5°,joints are not developed in N-S direction.Through the measurement of conjugate joints, 16 sets of joint data were obtained,the analysis of the equatorial projection shows that the NW-SE and NE-SW stresses are obvious, but the EW stress is not obvious.On the basis of previous studies on ore-field structure, the tectonic activities in the study area are divided into four phases, namely:the NS compressive stress is from late Indosinian to early Yanshanian,the NW-SE stress is in the middle and late Yanshan period,the NE-SW compressive stress is the early Himalayan,the EW pressure is the late Himalayan period,Among them, the middle and late Yanshannian is the metallogenic period. Through analyzing and studying the fault characteristics of the orefield,the above provides help for the analysis of the structural evolution history of the mining area and the prospecting work. |
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