MINERALOGY, PETROCHEMISTRY AND PETROLOGY OF THE ERHONGWA BASIC-ULTRABASIC COMPLEX IN XINJIANG
新疆二红洼基性-超基性杂岩体矿物、岩石化学及岩石学意义

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.