CAJ | 학술논문

库卫岩体主要由橄榄辉长岩、辉长岩、角闪辉长岩及斜长角闪岩组成。岩体稀土元素含量低，∑REE值为9.97×10-6~26.43×10-6，角闪辉长岩（La/Yb）N值为1.77~1.83，铕的正异常弱；橄榄辉长岩（La/Yb）N值为3.07~4.42，具明显的正铕异常。岩体不相容元素含量低，具明显的Sr，Rb，K正异常和Nb，Ta负异常，没有明显的P，Ti异常。岩体La-ICP-MS锆石U-Pb年龄为（381.2±2.8）Ma，形成于陆缘弧环境。岩浆主要来自于亏损地幔，可能受俯冲板片流体的交代。
고위암체주요유감람휘장암、휘장암、각섬휘장암급사장각섬암조성。암체희토원소함량저，∑REE치위9.97×10-6~26.43×10-6，각섬휘장암（La/Yb）N치위1.77~1.83，유적정이상약；감람휘장암（La/Yb）N치위3.07~4.42，구명현적정유이상。암체불상용원소함량저，구명현적Sr，Rb，K정이상화Nb，Ta부이상，몰유명현적P，Ti이상。암체La-ICP-MS고석U-Pb년령위（381.2±2.8）Ma，형성우륙연호배경。암장주요래자우우손지만，가능수부충판편류체적교대。
The Kuwei pluton is made up of olivine gabbro,gabbro,hornblende gabbro and plagioclase amphibolite.The pluton REE content is quite low,so that its∑REE changes only between 9.97 × 10-6~26.43 × 10-6.The (La/Yb)N of horn-blende gabbro reaches 1.77~1.83 with the weakly positive Eu anomaly.The (La/Yb)N of olivine gabbro reaches 3.07~4.42 with the obviously positive Eu anomaly.The content of incompatible elements is quite low,and with the Sr,Rb,K pos-itive anomaly,Nb,Ta negative anomaly without P,Ti obviously anomaly.Zircon La-ICP-MS U-Pb age of this pluton is (381.2±2.8) Ma,and formed in continental margin arc environment.The magma is mainly from the depleted-mantle,and it maybe affected by slab fluids explanation.