论文部分内容阅读
祁连山是我国岩浆活动最发育的地区之一。有侵入岩体数百个,由吕梁期至喜马拉雅期,从酸性岩至超基性岩,可呈岩脉、岩株和岩基状产出;既有受断裂控制的,也有与褶皱紧密联系的;它们与金属、非金属和稀有、放射性元素矿产有成生联系。依据该区1:20万区域地质调查取得的成果,即侵入岩的基本特征,与围岩的接触关系及同位素地质年龄资料,笔者对祁连山的岩浆侵入顺序进行了划分(图1);依据岩体群在时间上和空间上的分布特点,将祁连山细分为五个侵入岩区(图2),在此基础上阐述对该区岩浆活动规律的几点认识,仅供参考,文中欠妥之处,望批评指正。
Qilian Mountains is one of the most developed areas of magmatic activity in China. There are hundreds of intrusive rocks, from Luliang period to the Himalayan period, from acidic rock to ultrabasic rock, can be dikes, rock strains and rock-like output; both controlled by the fault, but also closely linked with the fold ; They are linked to metal, nonmetal and rare, radioactive mineral elements. Based on the results of 1: 200,000 regional geological survey in this area, that is, the basic characteristics of intrusive rocks, contact with surrounding rocks and isotopic geologic age data, the author classifies the magmatic intrusions in the Qilian Mountains (Figure 1) Based on the temporal and spatial distribution characteristics of soils, the Qilian Mountains are subdivided into five intrusive rocks (Figure 2). On this basis, some understanding of the law of magmatism in the area is presented for reference only. Where, hope criticism correct.