地质通报2016，Vol.35Issue(4)：542-552,11.
内蒙古白乃庙铜矿区含矿中酸性侵入岩LA-ICP-MS锆石U-Pb年龄、地球化学特征及成矿时代
A tentative discussion on zircon U-Pb geochronology and geochemistry of ore-bearing intermediate-acid intrusive rocks in the Bainaimiao copper ore district and the metallogen-ic epoch
摘要
Abstract
In order to determine the metallogenic epoch and ore-forming environment of the Bainaimiao copper deposit, the au⁃thors carried out research on isotope geochronology and geochemistry of ore-bearing intermediate-acid rocks. LA-MC-ICPMS zir⁃con U-Pb dating shows that the ages of three ore-bearing granodiorites samples are 421.5±1.8Ma, 438.6±3.4Ma and 459.3±3.6Ma respectively. These rocks have peraluminous calc-lkaline characteristics, and are enriched in LREE. There is a weak positive anomaly of Eu. The trace elements are obviously depleted in Ta and Nb. According to comprehensive ages and geochemical characteristics of ore-bearing granodiorites and the regional tectonic background, the authors consider that the Bainaimiao copper deposit was on the whole formed in the early Paleozoic and characterized by multi-period mineralization. In addition, the metallogenesis was related to the subduction event of ancient Mongolia Ocean in the Early Paleozoic.关键词
白乃庙铜矿/中酸性侵入岩/LA-MC-ICP-MS锆石U-Pb年龄/地球化学特征/成矿时代Key words
Bainaimiao copper deposit/intermediate-acid rocks/LA-MC-ICP-MS zircon U-Pb age/geochemistry/mineraliza-tion age分类
天文与地球科学引用本文复制引用
赵利刚,李承东,常青松,高学生,许雅雯,樊建廷,张阔..内蒙古白乃庙铜矿区含矿中酸性侵入岩LA-ICP-MS锆石U-Pb年龄、地球化学特征及成矿时代[J].地质通报,2016,35(4):542-552,11.基金项目
国家自然科学基金项目（批准号41272065）和中国地质调查局项目 （）
