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选取水泄铜(钴)矿床主成矿阶段的石英样品进行40Ar39Ar快中子活化法同位素地质年龄测定,获得坪年龄59.2±0.8Ma,对应的等时年龄为59.8±0.5Ma,反等时线年龄为59.9±0.1Ma,三者在误差范围内完全一致,都可代表矿石的形成年龄。该年龄与兰坪盆地铜多金属矿集区的矿床形成时代一致,反映包括水泄铜(钴)矿床在内的区域矿床形成于喜马拉雅造山运动早期统一的构造地质背景之下,受同一期构造—热演化事件的制约。
The 40Ar39Ar fast neutron activation isotope geochronometry was used to select the quartz samples from the main ore-forming stage of the water-draining copper (cobalt) deposit. The average age was 59.2 ± 0.8Ma and the corresponding isochron age was 59.8 ± 0.5Ma. The age of 59.9 ± 0.1Ma, three within the error range exactly the same, can represent the age of formation of ore. This age coincides with that of the copper polymetallic deposits in the Lanping Basin, indicating that the regional deposits, including the water-draining copper (cobalt) deposit, were formed under the unified structural and geological background of the early Himalayan orogeny. Due to the same phase structure - Thermal Evolution Constraints.