摘要
基于岩浆铬矿床与超镁铁质岩石的关系，从元素亲合性和共生规律的角度揭示了铝对铬成矿制约的主导作用。分析了铝和铬亲石、亲氧的二重性及其晶体化学的依存关系。论证了超镁铁Ｓｉ－Ｏ体系中铝丰度过高或过低均不利于铬的成矿。揭示了制约元素分散富集的因素都是在一定条件下互为依存和转化的。是在动态中的矛盾的对立和统一。
Based on the study of relation of magma-chromium deposits to ultramafic rocks,this paper has described the leading role of aluminum acting on chromium mineralization from the aspects of the affinity and intergrowth rule of elements.It is studied that the duality of lithophile and oxygenphile of aluminum and chromium,and the dependence among their crystal chemistry.Meanwhile,this paper describes that high or low content of aluminum in the ultramafic Si-O system is unfavourable for chromium mineralization.The factors which restrain concentration and dispersion of elements are interdependent and exchangeable in the certain condition,indicating the unity of opposites for contradiction in movements.
出处
《吉林地质》
1998年第1期32-35,42,共5页
Jilin Geology
基金
博士点基金
关键词
铝
铬矿床
成矿地球化学
超镁铁质岩
依存性
Ultramafic-rock Mantle source Silicate Isomorph Affinity Outer cation
