云南马头湾透辉石花岗斑岩锆石SHRIMP U-Pb年龄研究  

The SHRIMP U-Pb Age of Matouwan Diopside Granite Porphyry in Yunnan Province

作　　者：刘红英[1] 夏斌[1] 张玉泉[1] 

机构地区：[1]中国科学院广州地球化学研究所边缘海地质重点实验室,广东广州510640

出　　处：《地球学报》2003年第6期552-554,共3页Acta Geoscientica Sinica

基　　金：中国科学院知识创新工程重要方向性项目 (KZCX2 SW 117;KZCX2 10 1)的成果

摘　　要：位于云南省西部鹤庆县北衙Pb、Au等矿区西边的马头湾透辉石花岗斑岩锆石SHRIMPU Pb年龄为 34Ma ,反映该岩体的岩浆在上侵定位时的结晶时间或成岩时间 ,相当于渐新世 ,属于喜马拉雅期 ;成岩时间还表明 :控岩的哀牢山 金沙江走滑拉分的深断裂带受控于印度与欧亚两大板块的碰撞 (4 5Ma左右 ) ,其年龄基本相当或略晚于前者 。The SHRIMP technique was applied to determining U-Pb age of the Matouwan diopside granite porphyry in western Yunnan Province. The results show that the Matouwan diopside granite porphyry was intruded at 34 Ma,which should be Oligocene in time and belong to Himalayan period. The age indicates that the Ailaoshan-Jinshajiang deep fracture zone is controlled by the collision of the Indian plate with the Eurasian continental plate at about 40 Ma.The formation of Matouwan diopside granite porphyry must have had inherent connection with the collision of the two plates.

关 键 词：锆石 SHRIMPU-Pb年龄 透辉石花岗斑岩 马头湾 云南 

分 类 号：P578.941[天文地球—矿物学] P597[天文地球—地质学]