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江西德兴新建英安玢岩岩筒中的捕虏包体,象深钻一样提供了扬子准地台深部岩石构成的信息。其中最重要的两种捕虏体是铁矿浆屑和铁铝榴石黑云母片麻岩。片麻岩所经历的变质作用事件,由老到新可表示为:PT_1~1—P_1~2—TP_2~1—P_2~2—TC_3—P_4~1—C_4~2。与TP_1~1和TP_2~1两个主要事件相应的变质矿物共生分别是Alm—Bi—Mt—Kf—P1—Q和Hc—Sill—Alm,相应地大致形成于600—700℃,3×10~8Pa,深12km和700°—800℃,>3×10~8Pa,深度≮20km。
The captive enclave in the newly built Angian quarry rock cylinder in Dexing, Jiangxi provides information on the composition of the deep rock in the Yangtze quasi-platform as well as deep drilling. The two most important of these are xenoliths and almandite biotite gneiss. The metamorphic event experienced by gneiss, from old to new can be expressed as: PT_1 ~ 1-P_1 ~ 2-TP_2 ~ 1 ~ P_2 ~ 2-TC_3-P_4 ~ 1-C_4 ~ 2. The metamorphic mineral assemblages corresponding to the two main events TP_1 ~ 1 and TP_2 ~ 1 are Alm-Bi-Mt-Kf-P1-Q and Hc-Sill-Alm respectively corresponding to roughly formed at 600-700 ℃ and 3 × 10 ~ 8Pa, depth 12km and 700 ° -800 ℃,> 3 × 10 ~ 8Pa, depth ≮ 20km.