| 薛生升.中条山地区郭家沟基性-超基性岩LA-ICP-MS锆石U-Pb年代学及地质意义[J].地质与勘探,2019,55(1):64-76 |
| 中条山地区郭家沟基性-超基性岩LA-ICP-MS锆石U-Pb年代学及地质意义 |
| Zircon U-Pb ages of basic-ultrabasic rocks at Guojiagou, the Zhongtiao mountains and geological implications |
| 投稿时间：2018-03-05 修订日期：2018-06-25 |
| DOI：10.12134/j.dzykt.2019.01.006 |
| 中文关键词: 基性-超基性岩 中条山 横岭关亚群 U-Pb年龄 铜镍矿床 |
| 英文关键词: basic-ultrabasic rocks, Zhongtiao Mountais,Hanglingguan Subgroup, U-Pb age, Cu-Ni sulfide deposit |
| 基金项目:中国地质调查局项目《重要矿种关键问题调查与矿产地质专题填图试点》 （编号：DD20160124） 资助 |
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| 中文摘要: |
| 中条山主要由涑水片麻杂岩、绛县群、中条群、担山石群和熊耳群组成，并发育着著名的铜矿峪型矿床、胡-篦型矿床和横岭关型矿床。郭家沟基性-超基性岩主要侵位涑水片麻杂岩中，岩体由内向外发育着透闪岩-变余辉石岩-辉长岩-斜长角闪岩的岩相分带。透闪岩LA-ICP-MS锆石U-Pb显示岩体侵位于2303Ma，属于古元古代。通过岩体野外侵位、覆盖关系，结合已有同位素资料，我们认为绛县群横岭关亚群沉积时限在2189~2303Ma之间。同时根据岩体构造环境、岩体形态、岩相分带以及铜矿化情况，以及铜凹组和篦子沟组两套含矿地层中均出现本期岩浆锆石，认为本区基性-超级性岩中发育有铜成矿作用，找矿前景乐观。 |
| 英文摘要: |
| The Zhongtiao Mountains consists mainly of the Sushui gneiss complex, Jiangxian Group, Zhongtiao Group, Dhanshanshi Group and Xiong’er Group, where developed Tongkuangyu type, Hu-bi type and Henglingguan type copper deposits. The principal emplacement of the Guojiagou basic-ultrabasic rocks is the Sushui gneiss complex. The intrusion with lithological zoning，from the core to the edge, hosts tremolite-palimpsest pyroxenolite- gabbro- amphibolite. LA-ICP-MS zircon U-Pb dating of tremolite shows intrusion of rock mass occurred 2303Ma ago, which is a paleo-Proterozoic age. From the relationship between field emplacement and coverage of rock mass, combined with isotopic data, we suggest that the Hanglingguan Subgroup formed in 2189~2303Ma. According to the tectonic setting, rock shape, lithological zoning and copper mineralization, and both Tongwa Formation and Bizigou Formation, which are two ore-bearing strata, have detrital zircons that from Guojiagou basic-ultrabasic rock, we consider that the Guojiagou basic-ultrabasic rocks have copper mineralization, implying an optimistic ore-search prospect. |
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