巴泉角砾岩的成因探讨

THE PETRO GENSIS OF BRECCIA IN BA QUAN URANIC DEPOSIT: A DISCUSSION

在《巴采矿花岗斑岩中交代钠长岩及其演化特征》一文中,作者揭示了巴泉花岗斑岩未被全部破碎成角砾,指出了马泉角砾岩非爆破成因。按M.E.Mcallcem和D.L.Reynolds等人的观点,流体化作用是爆发角砾岩筒成因的主要因素。笔者经过周密的野外调查,通过构造和岩石的分析工作,认为巴泉“岩筒”不是爆发角砾岩筒,“岩筒”中的角砾是经受强烈钠交代作用后被构造作用破碎成的构造角砾岩。

In the previous article, 'The character of metasomatic albitete and its evolution of granitophyre in Ba Quan uranodeposit' notes that the granophyre does not all fragment into breccia in which give a hint of petrogensis of the breccia. According to the viewpoints(of D.L.Reynolds, 1954, and M. E. Mcacallum, 1985)which proves the fluidization processes to be the petrogensis of explosion breccia, after a thorough investigation and detailed structural examination and petrological analysis, this paper demonstrates that the Ba Quan's breccia pipe is not explosionbreccia pipe, and the breccia is a structural breccia fragmented by structuralstresses after strong Na-metasomatism.