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前言出露于山西省五台山区的五台群,是研究前震旦纪地质的重要对象。百余年来,中外地质工作者做了大量工作,取得的成果使人们对该群的认识不断深入、广泛。六十年代中期,山西区调队通过一比二十万平型关幅区域地质测量,对五台群的变形变质特征、地层层序与划分、岩浆活动及成矿作用等首次做了全面的论述。所建立的地层层序已在七十年代纳入华北地区区域地层表,为进一步研究五台群奠定了基础。从七十年代末期开始,对该群的研究进入了新的阶段,各个领域的发现暴露出原有认识的某些重大缺陷,揭示了五台群更多的奥秘。本文是山西区调四分队几年来在五台山区开展一比五万区域调查及五台群专题研究的初步成果。
Preface The Wutai Group, which was exposed in Wutai Mountain of Shanxi Province, is an important target for the study of the former Sinian geology. For more than a hundred years, a great deal of work has been done by the Chinese and foreign geologists, and the achievements made in this field have made people’s understanding of the group ever-deepening and extensive. In the mid-1960s, Shanxi Province Tailings team made a comprehensive exposition of the deformation and metamorphism, stratigraphic sequence and division, magmatic activity and metallogenesis of Wutai Group through the geological survey of one to two hundred thousand flat-type seals. The established stratigraphic sequence was incorporated into the regional table of North China in the seventies, laying the foundation for the further study of the Wutai Group. Since the late 1970s, the research on this group has entered a new phase. The discoveries in various fields have exposed some major defects of the original understanding and revealed more mysteries of the Wutai Group. This article is the first result of a survey conducted by the Shanxi Tiaodu unit in one to five hundred thousand areas in Wutai Mountain in recent years and the special study of Wutai Group.