四川省前寒武系基底研究述评

COMMENTS ON THE RESEARCH ON THE PRECAMBRIAN BASEMENT IN SICHUAN

前寒武系基底占有地壳自身演化90％的漫长历史,在人们研究地球的形成、地壳演化和生命起源;研究岩浆作用、变质作用、成矿作用等方面,涉及到广泛的基础学科领域,理所当然的受到人们的特殊重视。在国际地科联组织下,我国成立了“前寒武系构造样式及成矿作用”(IGCP-247项)后继项目中国组,笔者作为该组成员,曾于1986年对四川前寒武系基底研究现状进行过一次清理,本文即在此基础上撰写而成。作者既对四川省前寒武系基底研究的进展、现状以及存在的不同认识和争论进行了述评,也提出了今后的展望和建议。

Because geologic history of Precambrian basement accounts for 90% of crustal evolution history, the research on Precambrian basement is of great importance to the research on the formation of earth and crustal evolution, the origin of life, magmatism, metamorphism, mineralization etc. According to the plan of the International Union of Geologic Sciences (IUGS), a Chinese group for the succeeding item of 'The Structrual Pattern and Ore-formation in the Precambrian System' (IGCP-247 item) has been estab- lished in China. Auther, as a member of the group, investigated the present situation of the research on the Precambreian basement in Sichuan in 1986. On the base of this investigation, the present paper has commented on the present situation, progress, different viewpoints in the research on the Precambrian basement in Sichuan, and made prospects and suggests.