| Citation: | Yang Bo, Han Runsheng, Wu Jianbiao, Feng Zhixing, Ding Tianzhu, Wu Peng, Gong Hongsheng, Li Lingjie, Yuan Hang. Structural graded ore-controlling rule and ore-controlling structural combination pattern of Daliangzi lead-zinc deposit in southwestern Sichuan[J]. Bulletin of Geological Science and Technology, 2023, 42(1): 144-157. doi: 10.19509/j.cnki.dzkq.2022.0174
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The Daliangzi lead-zinc deposit is located in the southwestern Sichuan ore concentration area in the southwestern margin of the Yangtze block, and the ore body′s occurrence obviously controlled by the structure.Aiming at the problem of unclear ore-controlling rules and combinations of ore-controlling structures, based on the theory and method of ore field geomechanics, through the identification of the mechanical properties of typical ore-controlling structures at different levels and the structural screening of different stages, the ore-controlling structures, assemblages and their formation mechanisms were clarified. The research shows that the metallogenic structural system is the late Indosinian NE structural belt.Under the NW-SE principal compressive stress, the resulting structures of different scales control the occurrence of the ore deposit, ore body and ore vein; At the same time, form various structural assemblages: strike-slip at the deposit scale is dominated by fault-fold tectonic assemblages, and orebody-scale assemblages are "multi-shaped", "in-shaped" and "black fractured zone" structural assemblages.This study provides an important basis for prospecting and exploration in the deep and peripheral parts of the deposit.
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