摘要
对比研究表明,内蒙古"宝音图隆起"和狼山地区的古元古代宝音图岩群与新太古代色尔腾山岩群都是由中低级变质的各种片岩、大理岩组成,一致的岩石组合和变质相暗示二者可能是等同物而不是两个岩群。以物探资料为据的构造研究也证实,"宝音图隆起"与狼山地区之间并无槽-台级的大型断裂构造分开,二者实为统一的构造整体而不是分属槽台,只因两侧被两条近于平行的NE向断裂围限,使其总构造线方向呈NE或NNE向而与色尔腾山的构造线不同。结论认为,"宝音图隆起"仍是华北陆块的一部分,不属于内蒙古—大兴安岭地槽褶皱系。
Comparing the Palaeoproterozoic Buyant Rock Group in the Buyant uplift and Langshan Mountain with the Neoarchean Seertengshan Rock Group in the northern margin of the North China platform, it can be confirmed that both Rock Groups are mainly composed of schists and marbles with midˉlower metamorphism. The similar rock association and metamorphic facies indicate that both Rock Groups may be the same one. The geophsical prospecting also proved that between the Buyant uplift and Langshan Mountain there is no a great fault separating them into foldbelt and platform. The Buyant uplift with NE or NEE strike direction has two parallel faults with EˉW strike in the north and south and another two prallel faults with NE strike in the east and west, which makes the Buyant uplift look like a rhombus body in the Caledonian foldbelt. In fact, Buyant uplift and Langshan Mountain are both in or belong to the North China platform.
出处
《地质调查与研究》
2004年第1期18-23,共6页
Geological Survey and Research
基金
中国地质调查局地质调查综合研究项目(20001020221003)
