LA-ICP-MS Zircon U-Pb Ages and Implications for Tectonic Setting of the Mangling Granitoid Plutons in Qinling Orogen Belt

详细信息   

• 责任者：Qin Haipeng (Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Wu Cailai
• 刊名：Geological Review
• 出版年：2012
• 卷期：58(4)
• 关键词：花岗岩 ; granite ; 铀—铅计时 ; U-Pb dating ; 秦岭 ; Qinling Mountains
• 页码：p.783-793
• 图表：8 illus., 2 tables, 47 refs.
• 分类号：0801
• issnNo：ISSN0371-5736
• isbnNo：CN11-1952/P

摘要

The Mangling granite is located on the north side of the Shannan-Danfeng fault, eastern sector of the north Qinling Orogen. The granite is in North-West-West strech and in agreement with structural lineament. This paper reports the results of Zircon LA-ICP-MS U-Pb age and geochemical data. The results show that the Mangling granite includs two granite emplacements. Early monzogranite whose ages ranging from (158.4 ± 1.8) Ma to (160.5 ± 1.3) Ma belongs to Late Jurassic Early Cretaceous period and the late alkali granite has an age of (124.1 ± 2.0) Ma belonging to Middle Cretaceous. In addition, sample 09CL264 give inherited core age of (1 883 ± 36) Ma and (1 860 ± 35) Ma belonging to Proterozoie and may represent its protolith age.