【摘要】 位于哀牢山—金沙江新生代钾质碱性岩浆岩带南段的玉召块、马头湾和十里村透辉石花岗岩锆石SHRIMP定年结果为 38Ma、34Ma和 37Ma,相当于渐新世,属于喜马拉雅期,结合岩石化学、微量元素、稀土元素和Sr、Nd、Pb同位素组成等,对控岩机制、岩石的属性和成因以及锆石的成因进行探讨。更多还原

【Abstract】 Yushaokuai, Matouwan and Shilicun diopside granites lie in the south segment of the Ailaoshan-Jinshajiang Cenozoic alkaline magmatic rock belt. The SHRIMP technique was applied to determining U-Pb age of the Yuzhaokuai, Matouwan and Shilicun diopside granites. The results show that the Yuzhaokuai, Matouwan and Shilicun diopside granites were intruded at 38 Ma, 34 Ma and 37Ma, which should be Oligocene in time and belong to the Himalayan period. According to the pertrochemistry, trace element, lanthanon and Sr, Nd and Pb isotopic characteristics of the diopside granites and so on, the rock-controlled mechanism, petrological characteristics and origin as well as origin of zircon were discussed.更多还原