摘要
二红洼杂岩体出露地表部分分南北两个岩体,在深部可能相连。分两个侵入期、4个岩相。通过对其矿物、岩石化学的研究表明,构成岩体主体部分的第一侵入期分异良好,是在液态重力分异的基础上,经重力分离结晶作用形成自橄榄岩相、橄榄辉长岩相向含石英苏长辉长岩相的分异趋势;第二侵入期辉长苏长岩相分异程度低。岩浆起源于上地幔,属于拉斑玄武岩系列,发生过金属硫化物的熔离作用。
The Erhongwa basic-ultrabasic complex, exposed 1.15 km southeast of Hami, Xinjiang, consists of the southern and northern rock bodies, which possiblly link together underground. Two intrusive periods and four petrofacieses can be distinguished. The rocks of the first period which constitute the main part of the complex are best differentiated and show a differentiation trend from peridotite facies and olivine-gabbro facies to quartz-bearing noritegabbro facies formed by gravity fractional crystallization based upon liquid gravity differentiation. The second period's gabbronorite facies is poorly differentiated. The magma originated from the upper mantle and belongs to the tholeiitic series which has undergone immiscible separation of metal sulfide.
出处
《地球学报》
EI
CAS
CSCD
1993年第Z1期43-54,共12页
Acta Geoscientica Sinica
