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利用Re-Os同位素定年方法对云南境内金沙江-红河成矿带中的斑岩铜矿进行了年代学研究,获得了马厂箐(33.9±1.1)Ma和铜厂(34.4±0.5)Ma的新数据。表明马厂箐和铜厂两个矿区的斑岩型铜钼矿是基本同时形成的。结合前人获得的西藏玉龙铜矿(与马厂箐和铜厂位于同一成矿带)的辉钼矿Re-Os模式年龄(35.4,35.9,36.2 Ma),可以认为,金沙江-红河成矿带中近于等间距分布的3个新生代斑岩铜矿是基本同时形成的,均属始新世后期同一成矿集中期的产物。
Using the Re-Os isotopic dating method, the porphyry copper deposits in the Jinshajiang-Honghe metallogenic belt in Yunnan Province have been studied by chronology. The results show that Ma Zhuang (33.9 ± 1.1) Ma and Cu (34.4 ± 0.5) Ma New data It shows that the porphyry copper-molybdenum deposits in the two mines of Ma Changtao and Tongchang are basically formed at the same time. Combined with the Re-Os age of molybdenite (35.4, 35.9, 36.2 Ma) in Tibet’s Yulong copper deposit (which is located in the same metallogenic belt as that of Machanggou and Tongchang), it is considered that the Jinshajiang-Honghe mineralization Three Cenozoic porphyry copper deposits with near-equidistance distribution are basically formed at the same time, which belong to the same ore forming and concentrating period in the late Eocene.