| 斜锆石U-Pb定年应用于内蒙古东北部镁铁-超镁铁岩带的讨论 |
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| 引用本文： | 金松,杨时骄,张杨,梁恒.斜锆石U-Pb定年应用于内蒙古东北部镁铁-超镁铁岩带的讨论[J].化工矿产地质,2020(2):125-131. |
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| 作者姓名： | 金松 杨时骄 张杨 梁恒 |
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| 作者单位： | 1.河北地质大学资源学院;2.中化地质矿山总局地质研究院;3.山东省第一地质矿产勘查院 |
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| 摘 要： | 斜锆石作为一种岩浆锆石产于镁铁-超镁铁岩中,是测定其形成年代的理想对象。目前斜锆石定年应用最广泛的三种方法包括ID-TIMS法、SHRIMP法和LA-ICP-MS法,各自有其适用的范围及局限性。内蒙古东北部乃至兴蒙造山带的镁铁-超镁铁岩的斜锆石定年研究相对欠缺,该地区好老鹿场-牤牛海镁铁-超镁铁岩带由于锆石成因的复杂性造成其年代学研究出现了较大分歧。通过与前人研究进行对比分析在杜尔基镁铁-超镁铁岩定年样品CL图像中识别出斜锆石,结合斜锆石U-Pb定年研究现状分析认为在内蒙古东北部镁铁-超镁铁岩带采用LA-ICP-MS法斜锆石U-Pb同位素定年工作可行,有望取得良好的效果,可以为古亚洲洋构造域演化提供准确可靠的年代学依据。
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| 关 键 词： | 斜锆石 镁铁-超镁铁岩 U-Pb 同位素定年 锆石成因 兴蒙造山带 |
Discussion on U-Pb dating application of baddeleyite to mafic-ultramafic rock belt in northeast Inner Mongolia |
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| Jin Song,Yang Shijiao,Zhang Yang,Liang heng.Discussion on U-Pb dating application of baddeleyite to mafic-ultramafic rock belt in northeast Inner Mongolia[J].Geology of Chemical Minerals,2020(2):125-131. |
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| Authors: | Jin Song Yang Shijiao Zhang Yang Liang heng |
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| Institution: | (School of Nature Resources,Hebei GEO University,Shijiazhuang,Hebei,050031,China;Research Institute of Geology,China Chemical Geology and Mine Bureau,Beijing,100101,China;Shandong No.1 Geological and Mineral Exploration Institute,Jinan,Shandong,250014,China) |
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| Abstract: | As a kind of magmatic zircon produced in mafic-ultramafic rocks,baddeleyite is an ideal object to determine the age of formation.The three most widely used methods for dating of baddeleyite include ID-TIMS method,SHRIMP method and LA-ICP-MS method.These methods have their own scope and limitations.There is a relative lack of research on the baddeleyite dating of mafic-ultramafic rock in northeast Inner Mongolia and even in Xingmeng orogenic belt.Due to the complexity of zircon genesis,there is a great difference in the chronology of mafic-ultramafic rock belt in Haolao dear farm-Mangniuhai in this area.Through comparative analysis with previous studies,the baddeleyite was identified in CL images of Durky mafic-ultramafic dating samples.Combined the status quo of baddeleyite U-Pb dating,the analysis shows that the LA-ICP-MS method of U-Pb isotope dating is feasible in mafic-ultramafic rock in northeast Inner Mongolia.It is expected to achieve good results and provide accurate and reliable chronological basis for the evolution of paleo-Asian ocean tectonic domain. |
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| Keywords: | Baddeleyite Mafic-ultramafic rock U-Pb isotope dating Zircon genesis Xingmeng orogenic belt |
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