CAJ | 학술논문

塔尔结拜一带镁铁质杂岩体位于新疆阿尔泰山东段，由十余个小的镁铁质岩体组成，岩相分带明显，主要由橄榄辉石岩、橄榄辉长岩、辉长岩、辉长辉绿岩等组成。岩石具贫钠(Na2O=0.44%~2.14%)、贫钾(K2O=0.05%~0.56%)的特征，属低钾(拉斑玄武岩)系列。岩石Mg#值为0.70~0.85；弱的正铕异常(δEu=0.97~1.18)，稀土元素总体呈右倾特征；岩石具Ba，Ta富集，Rb，Th，K，Ti亏损特征，具非常发育的分离结晶作用，橄榄辉石岩、橄榄辉长岩主要由早期结晶相聚集而成。岩体Ce/Pb在2.61~10.00，说明岩石受一定程度同化混染作用。结合临近库卫岩体的特征和区域构造演化特征，推测塔尔结拜侵入杂岩形成于早—中泥盆世，岩浆来源于亏损型地幔。
탑이결배일대미철질잡암체위우신강아이태산동단，유십여개소적미철질암체조성，암상분대명현，주요유감람휘석암、감람휘장암、휘장암、휘장휘록암등조성。암석구빈납(Na2O=0.44%~2.14%)、빈갑(K2O=0.05%~0.56%)적특정，속저갑(랍반현무암)계렬。암석Mg#치위0.70~0.85；약적정유이상(δEu=0.97~1.18)，희토원소총체정우경특정；암석구Ba，Ta부집，Rb，Th，K，Ti우손특정，구비상발육적분리결정작용，감람휘석암、감람휘장암주요유조기결정상취집이성。암체Ce/Pb재2.61~10.00，설명암석수일정정도동화혼염작용。결합림근고위암체적특정화구역구조연화특정，추측탑이결배침입잡암형성우조—중니분세，암장래원우우손형지만。
Taerjiebai rock body lies in the east belt of Altay mountains in Xinjiang,which is made up of more than ten mafic intrusions.Taerjiebai rock body has very petrography zoning,the main rocks in the complex are olivine-pyroxe-nite, olivine-gabbro, gabbro, gabbro diabase etc. Rocks has the characteristic of lacking Na and K (Na2O=0.44%~2.14%, K2O=0.05%~0.56%), which is belong to tholeiite. The value of Mg# between 0.70 and 0.85, not obvious Eu anomalies (δEu=0.97~1.18); they have relatively high Ba, Ta and rather low Rb, Th, K and Ti. Evidences for greatly developmental fractional crystallization comes from the petrography,petrochemistry and REEs geochemistry.Olivine pyroxenites and olivine gabbros are mainly formed by assembly of early crystallized.Respondence form Ce/Pb=2.61~10.00, the rocks must have been subjected to contamination. Taerjiebai rock body was formed in Early-Middle Devonian.On the basic of Kuwei rock body and regional tectonic development, the magmatic source belong to the depleted mantle.