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内蒙古中部苏尼特左旗地区三叠纪A型花岗岩锆石SHRIMP U-Pb年龄及其区域构造意义 被引量:113

SHRIMP U-Pb zircon dating of Triassic A-type granites in Sonid Zuoqi,central Inner Mongolia,China,and its tectonic implications
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摘要 内蒙古苏尼特左旗地区A型花岗岩位于索伦山-贺根山构造带内。高精度锆石SHRIMPU-Pb测年结果显示该花岗岩的侵位年龄为222Ma±4Ma。其成因可能与中亚造山带碰撞造山后的岩石圈伸展作用有关。 A-type granites occur along the Solon-Hegen tectonic zone in the Sonid Zuoqi area, central Inner Mongolia. High-precision SHRIMP U-Pb zircon dating of the A-type granites indicates that they were emplaced at 222±4 Ma. Their genesis might be related to post-coUisional orogenic lithospheric extension of the Central Asian orogenic belt during the Triassic.
出处 《地质通报》 CAS CSCD 北大核心 2007年第2期183-189,共7页 Geological Bulletin of China
基金 国家自然科学基金重点项目(批准号:40234045) 国家自然科学基金面上项目(批准号:40473030)资助。
关键词 A型花岗岩 锆石SHRIMP U-PB定年 三叠纪 苏尼特左旗 内蒙古 A-type granite SHRIMP U-Pb zircon dating Triassic Sonid Zuoqi, Inner Mongolia
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