北祁连山早晚奥陶世蛇绿岩层序与岩石特征  

SEQUENCES AND THE PETROLOGIC CHARACTERISTICS OF THE EARLY AND THE LATE ORDOVICIAN OPHIOLITE STRATA IN THE NORTH QILIAN MOUNTAINS

作　　者：董必谦 陶洪祥[2] 

机构地区：[1]中国建材地质勘查中心青海总队,810008 [2]西安地质学院地勘系,710054

出　　处：《西安地质学院学报》1992年第2期26-33,共8页

摘　　要：本文依据岩石学、岩石化学、痕量元素丰度值等资料,论证北祁连山早、晚奥陶世两期蛇绿岩层序结构,并与典型蛇绿岩层序相对比,认为这两套蛇绿岩具有超镁铁岩、镁铁岩、浅色岩组成的堆积杂岩和基性熔岩、深海沉积岩等的层序结构与岩石特征。The sequences and structures of the early and late Ordovician ophiolite strata in the north Qilian Mountains are expounded and proved in accordance with the data derived from petrology, petrochemistry, rare elements etc.and correlated with the typical ophiolite strata sequences.It is considered that the both ophiolitic suites are of the stratal configuration and the features of the complexes accumulational lava and the abyssal sediments composed of ultramafite, mafite and leucolith rocks.

关 键 词：蛇绿岩 堆积 杂岩 层序 岩石特征 

分 类 号：P588.3[天文地球—岩石学]