南蒙古地区西南欧玉花岗岩LA-MC-ICP-MS锆石U-Pb定年及其地质意义OA北大核心CSCDCSTPCD
LA-MC-ICP-MS zircon U-Pb dating of granite of southwestern Oyu Tolgoi region in South Mongolia and its geological significance
对蒙古国南戈壁省东部的西南欧玉岩体黑云母花岗岩锆石进行了阴极发光照相，结果显示，其具有明显的振荡环带，为典型的岩浆锆石特征。对22颗锆石进行了LA-MC-ICP-MS U-Pb年龄测定，结果显示，21个测点的206Pb/238U年龄介于334±2~335±2Ma之间，年龄加权平均值为335±1Ma，表明西南欧玉岩体形成于早石炭世。
The zircons from biotite granite in southwestern Oyu Tolgoi region show clear oscillatory zoning, indicating that they were formed by normal crystallization of magma. U-Pb dating of 22 zircons was conducted by LA-MC-ICP-MS method. The re⁃sults show that the data of 21 zircons are clustered around the concordia of 334 ± 2~335 ± 2Ma, yielding a weighted mean 206Pb/238U age of 335.6±1Ma, which implies that the crystallization of biotite granite in southwestern …查看全部>>
陈正;李俊建
中国地质调查局发展研究中心，北京100037中国地质调查局天津地质调查中心，天津300170
天文与地球科学
斑岩铜矿带LA-MC-ICP-MS锆石U-Pb定年南戈壁蒙古
porphyry copper beltLA-MC-ICP-MS zircon U-Pb datingOmno GoviMongolia
《地质通报》 2016 (4)
578-582,5
中国地质调查局项目（编号1212010561510、1212010811061、1212011120330）
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