地质通报2017，Vol.36Issue(5)：698-705,8.
四川攀西红格矿区辉长岩和正长岩的SHRIMP U-Pb和Sm-Nd定年及其地质意义
SHRIMP U-Pb and Sm-Nd dating of the gabbro and syenite from the Hongge ore district in western Panzhihua and its geological significance
摘要
Abstract
Adopting the SHRIMP U-Pb and Sm-Nd method, this paper reported the dating results of the bedded ore-bearing gab?bros and alkaline syenites from the Hongge ore district in western Panzhihua area. The results show that the zircons from gabbro in Hongge have ages of 258.4±4.1Ma, 1841±34Ma and 2487±12Ma, the Sm-Nd isochron age of the gabbro, pyroxene and apatite sam?ples is 253 ± 14Ma, while the zircon U-Pb age of alkaline syenite is 257.2 ± 1.5Ma. These data show that the zircon U-Pb age (258Ma) of the typical mafic rock is similar to the Sm-Nd isochron age of the same samples, and also similar to the zircon U-Pb age of syenite. Considering the close relationship between layered gabbro and alkaline syenite rock in space and in time, it is suggested that both of them resulted from Permian Magmatism, but 1841Ma and 2487Ma zircon might have been magmatic zircon and inherit?ed zircons, which originated from the basement. These data imply the existence of Paleo-Petrozoic or even Archean materials in the lower part of Kangdian axis magmatic rock belt or the crystalline basement.关键词
攀西红格矿区/辉长岩/正长岩/SHRIMP锆石U-Pb定年/Sm-Nd等时线Key words
Panxi area (western Panzhihua) ore district/syenite/gabbro/SHRIMP zircon U-Pb dating/Sm-Nd isochron分类
天文与地球科学引用本文复制引用
李华芹,王登红,张利国,任海涛,王晓地,贾小辉,杨文强..四川攀西红格矿区辉长岩和正长岩的SHRIMP U-Pb和Sm-Nd定年及其地质意义[J].地质通报,2017,36(5):698-705,8.基金项目
中国地质调查局项目《中国矿产地质与区域成矿规律综合研究(中国矿产地质志)》(编号:1212011220369)和《全国重要矿产和区域成矿规律研究》(编号:1212010633903) （中国矿产地质志）
