中条山地区晚太古界绛县群宋家山亚群地层划分的探讨

通过深入研究中条山北部、东部安山岩分布区岩性组合、矿化类型和岩石地球化学特征，并以晚太古-早元古代火山活动为线索，探讨了其形成的地质背景。在前人工作基础上，提出了建立宋家山亚群的意见，认为该套变质岩系应早于晚太古界绛县群铜矿峪亚群，是基于中条山地区基底层涑水杂岩之上的晚太古界最老的地层层位。

The Strata Division in Songjiashan Subgroup of Jiangxian Group of Late Archean in Zhongtiaoshan Area

The metamorphic rock series distributed in the three structural erosional ＂skylight＂ in the andesite area in the northern and eastern Zhongtiaoshan area occur a unique mineralization type and ore-forming association. But the ownership and division of the stratigraphic horizon have long been debated a lot.This paper discusses its forming geological background through deep-researching its lithologic association, mineralized type characteristic and rock geochemical feature under the clue of late Archean-lower Proterozoic and makes a suggestion of establishing Songjiashan subgroup on the basis of previous work .It is considered that the set of metamorphic rock series should he earlier than Tongkuangyu subgroup of Jiangxian group of late Archean. It is the oldest stratigraphic horizon overlying Sushui complex of foundation bed in Zhongtiaoshan area .