摘要
通过对塔儿山—二峰山碱性偏碱性杂岩体各类岩石的野外地质特征和岩石化学研究,认为岩浆岩侵入顺序为闪长岩类→正长岩类→二长岩类→花岗岩→脉岩类。源区岩浆经历了钙碱性→偏碱性→碱性的演化系列。Al2O3、TFe2O3、Na2O+K2O、MgO质量分数呈现与SiO2相反的演化特点。岩浆源区随岩浆演化由上地幔到地壳逐渐变浅。
Through researching the field geological properties and petrochemical features of different types of rocks of alkalic and alkalescent complex in Ta'ershan Mountain-Erfengshan Mountain,this paper holds that the intrusion sequence of pyrogenic rock is dioritoid→syenitoid→monzonite→granite→phlebite,the source region rock-magma had gone through the evolutionary series of calc -alkali magma →alkalescent magma →alkalic magma,and the contents of Al2O3,TFe2O3,Na2O+K2O and MgO had presented the evaluative features contrary to SiO2,and the source region of rock-magma was becoming light gradually from upper mantle to earth crust along with the evaluation of the rock-magma.
出处
《科技情报开发与经济》
2010年第15期150-152,共3页
Sci-Tech Information Development & Economy
关键词
碱性偏碱性岩
杂岩体
侵入期次
岩石化学特征
alkalic and alkalescent rock
complex
intrusion period
petrochemical features