Early Precambrian geology of the Yebaishou uplift in western Liaoning province
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摘要: 通过１∶５万地质填图工作，将叶柏寿隆起区的早前寒武纪建平群变质岩系进行了解体。新的研究成果表明区内基底岩系主要由晚太古代ＴＴＧ和ＣＡ质侵入杂岩及少量表壳岩，早元古代变质火山—沉积岩组成。最老的表壳岩呈捕掳体状分布在ＴＴＧ、ＣＡ质侵入杂岩中，ＣＡ质杂岩（辘轳井二长片麻岩）侵入ＴＴＧ质杂岩（叶柏寿片麻杂岩）中。Abstract: The Early Cambrian Jianping Group established in the Yebaishou uplift by the lithostratigraphic method in western Liaoning was disintegrated by present geological mapping （1∶ 50 000 ） which adopted the tectono petrological event method. The research work gives the following conclusions: （1）The basement of the Yebaishou uplift consists of Late Archean trondjemite tonalite granodiorite （TTG） calc alkaline （CA） intrusive complex and granopegmatite with a small amount of supracrustal rocks and Early Proterozoic metamorphosed volcanic sedimentary rocks. （2）The oldest rocks are supracrustal rocks, which occur as xenoliths in earlier sodium rich rocks （TTG rock series） and later potassium rich rocks （CA rockseries）. The CA complex （the Lulujing monzonitic gneissic complex） is intruded into the TTG complex （Yebaishou gneissic complex）. （3）The Early Proterozoic volcanic sedimentary rocks overlie unconformably the Late Archean rock complex.
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Key words:
- Yebaishou uplift /
- Precambrian /
- supracrustal rock /
- TTG CA intrusive complex
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