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西准噶尔地槽褶皱带,形成以大断裂为主干的四条弧形构造带,成为区域构造格架。弧形大断裂及其派生次级断裂,为超基性岩浆侵贮提供了空间条件。超基性岩体成群出现,分段集中,总体成弧形带状展布。据不同性质断裂组合方式,对超基性岩带又分为人字型、折线型、串珠状等构造型式。随断裂作用强度由南往北变弱,超基性岩浆侵入活动亦依次减弱,岩体数量及出露面积减少和变小,成带性由明显至不明显,岩石类型、岩(体)带平均化学成分由偏基性向偏酸性演化,铬矿化碱弱。诸岩体(群)的空间分布规律,反映了地质构造的发展、演化特征。
West Junggar geosynclinal fold belt, forming a large fault as the backbone of the four arcuate tectonic zone, a regional tectonic framework. Large arcuate faults and their derived secondary faults provide the space conditions for ultramafic magmatic intrusion. Ultramafic rocks appear in groups, sub-sections concentrated, the overall arc-shaped strip distribution. According to different types of fracture combinations, the ultrabasic rocks are divided into herringbone, fold line, beaded and other structural types. The intensity of the fault weakens from south to north, and the ultramafic magmatic intrusions also decrease in turn, the number and area of rock mass decrease and decrease, and the zonality changes from obvious to insignificant. The rock type, The average chemical composition from partial to acidic evolution, chromium mineral alkali weak. The spatial distribution regularity of various rock mass (group) reflects the development and evolution characteristics of geological structure.