The Genesis of Dunites in the Songshugou Utramafic Rock Body, North Qinling;
北秦岭松树沟超镁铁质岩中两类不同成因的纯橄岩
Petrology, mineral chemistry and trace element geochemistry of the dunite xenoliths in gabbro-dioritic rocks from western Shandong indicate that the dunite xenoliths would be relicts of high degree partial melting of ancient (Archean) lithospheric mantle.
鲁西中生代辉长-闪长质岩石中纯橄岩捕虏体的岩石学、矿物化学及微量元素地球化学研究表明,纯橄岩捕虏体代表了古老岩石圈地幔的残留;地幔纯橄岩捕虏体中存在两种类型的交代作用,一是以填隙型金云母为代表的早期富含CO_2和H_2O的不活动流体的交代作用;二是以斜方辉石交代脉和网络状斜方辉石为代表的晚期富硅质熔(流)体的交代作用。
The Xiaozhangjiakou mafic-ultramafic complex, north Hebei, is composed mainly of pyroxenites and subordinate dunite.
冀北小张家口基性-超基性杂岩体主要由辉石岩和次要的纯橄岩组成,并含有方辉橄榄岩透镜状捕掳体。