摘要
太平寨紫苏花岗岩套是由围岩即石英闪长质-英云闪长质紫苏斜长片麻岩深熔形成。变质流体相中水的局部富集是导致形成紫苏花岗岩套的深熔作用的重要因素。紫苏花岗岩套岩石中残晶斜长石和结晶斜长石化学成分对比表明深熔过程是在非平衡或亚稳状态下进行的。
Study on geological occurrence, residual minerals, crysralline minerals, and geochemistry of the charnockitic suite in Taipingzai area indicates that the suite of rocks was derived by anatexis of its surrounding rocks——dioriticonalitic hypersthene plagioclase gneisses. The local concentration of H_2O in metamorphic fluid is an important factor for anatexis of the previous rocks to form the charnockitic suite. A composition comparison between residualplagioclase and crystalline plagioclase suggests that the anatectic process proceeded under the condition of nonequilibrium or metastable melting.
出处
《岩石学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第2期136-144,T001,共10页
Acta Petrologica Sinica
基金
地矿部"七五"科技攻关第13项(86013-3-430)研究成果之一
关键词
紫苏花岗岩套
残晶矿物
成因
Charnockitic suite
Residual minerals
Crystalline minerals
Anatexis
