内蒙古迪彦庙白音高老组火山岩岩石学特征  

Petrological characteristics of volcanic rocks of Baiyingaolao Formation in Diyanmiao,Inner Mongolia

作　　者：张红晨[1] 贺秋利[1] 边雄飞 宋鹏[1] 王立考[1] 武鹏[1] 

机构地区：[1]石家庄经济学院,河北石家庄050031 [2]山东省第六地质矿产勘察院,山东招远265400

出　　处：《吉林地质》2013年第2期9-13,共5页Jilin Geology

基　　金：中国地质调查局项目(1212011120701);河北省科技计划项目(11277106D;12276709D);河北省教育厅科研计划项目(Z2010295)联合资助

摘　　要：内蒙古迪彦庙位于中朝古板块与西伯利亚古板块之间的兴蒙造山带,广泛分布中生代陆相火山岩。岩相学特征和硅酸盐分析表明,白音高老组为一套酸性火山岩,SiO2质量分数74.54%～77.21%,在TAS图上全部投在流纹岩范围,主要岩性为流纹岩、流纹质火山角砾岩、流纹质含角砾玻屑晶屑熔结凝灰岩。通过对迪彦庙白音高老组火山岩的地质特征、岩相学特征和岩石化学研究,认为该区火山岩的原始岩浆可能为中下地壳物质部分熔融形成。Diyanmiao of Inner Mongolia is situated in the Daxinganling-Mongolia orogenic belt between Sino-Korean paleo-plate and Siberia paleo-plate by extensively-distributed Mesozoic continental facies volcanic rocks.Petrographic characteristics and silicate analysis shows that Baiyingaolao Formation is composed of a set of acidic volcanic rocks,the average content of SiO2 is 74.54～77.21%,and all the plots on the TAS diagram are located in the rhyolite area.Volcanic rocks of the Baiyingaolao Formation are dominated by rhyolite,rhyolitic volcanic breccia,rhyolitic vitric crystal tuff containing breccia,tuffaceous sandstone,tuffaceous conglomerate.On the basis of field survey and study of geology,petrography and lithochemistry,these volcanic rocks were originated by partial melting of a source from middle-lower crustal magma.

关 键 词：白音高老组 火山岩 岩石学 内蒙古迪彦庙 

分 类 号：P588.14[天文地球—岩石学]