190Pt–4He age of PGE ores in the Alkaline–Ultramafic Kondyor Massif (Khabarovsk District, Russia)
190Pt–4He age of PGE ores in the Alkaline–Ultramafic Kondyor Massif (Khabarovsk District, Russia)
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碱性-超镁铁质康德尔地块（俄罗斯哈巴罗夫斯克区）PGE矿石的190Pt-4He年龄
DOI：
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发表时间：
2016
影响因子：
0.9
通讯作者：
N. Bortnikov
中科院分区：
文献类型：
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作者：
A. Mochalov;O. Yakubovich;N. Bortnikov
俄罗斯科学院前寒武纪地质和地质年代学研究所开发了一种新的190Pt-4He方法来测定异铂的年代。在这里，我们发表了第一个从主要矿物学和地球化学类型对异铁铂进行定年的结果。所得190Pt-4He年龄为129±6 Ma。康迪奥尔地块不同成因（岩浆成因、流体变质成因和交代成因）的异铁铂样品190Pt-4He年龄表明，PGM成矿与以苦橄岩为主的演化是同步、先后发生的，其次是阿尔丹地盾中生代构造岩浆活化的亚碱性和碱性熔体。
A new 190Pt–4He method for dating isoferroplatinum has been developed at the Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences. Here we publish the first results of dating of isoferroplatinum from the main mineralogical and geochemical types of PGE mineralization in dunite. The obtained 190Pt–4He age of isoferroplatinum is 129 ± 6 Ma. The gained 190Pt–4He age of isoferroplatinum specimens of different genesis (magmatic, fluid–metamorphogenic, and metasomatic) from the Kondyor Massif indicates that the PGM mineralization took place synchronously and successively with evolution of primarily picrite, followed by subalkaline and alkaline melts of the Mesozoic tectonic–magmatic activation of the Aldan Shield.