摘要
火—沉粘土岩是由火山喷发的细碎屑物经大气搬运降沉在各种介质中,受水解、强烈粘土化而形成,是当前沉积学研究中的薄弱环节。重点研究了火—沉粘土岩中微量元素的地球化学特征及其与花岗岩中相应元素特征的区别,并利用板块构造消减带两侧上地幔软流圈中熔浆化学分异理论,对火—沉粘土岩的物源岩浆类型和化学分异机制进行了探讨。
Volcanic-sedimentary claystone of hydrolysis and strong clayization of fine fragments that are erupted and are transported by air fall, and are deposited in various kinds of media. It is a weak link in the current study of sedimentology. This paper puts emphasis on the study of the geochemical features of the trace elements in volcanic-sedimentary claystone and their difference from the features of corresponding elements in granite. This paper also discusses the source magma type and chemical differentiation mechanism of the volcanic-sedimentary claystone by applying the theory of chemical differentiation of molten magma in the upper mantle asthenosphere on both sides of the subduction zone.
出处
《中国区域地质》
CSCD
1993年第4期348-355,共8页
Regional Geology of China
