英语语法分析

The ultramafic intrusive complex is composed of dunite, peridotite, pyroxenite, gabbro and their metamorphic products.

超镁铁质侵入杂岩体由纯橄岩，橄榄岩，辉石岩，辉长岩及它们的变质产物组成。

This paper deals with the geological characteristics of a dunite body with layering structure from Sichuan-Yunnan area.

本文对川滇地区某纯橄榄岩体的地质特征进行了初步研究。

The Ophiolite massifs are composed of mantle peridotite that is mainly harzburgite and dunite, and lacked of crust magmatite within the typical Ophiolite suite.

摘要该蛇绿岩带的岩体由地幔橄榄岩组成，主要岩石类型是方辉橄榄岩和纯橄榄岩，缺少典型蛇绿岩剖面中的洋壳单元。