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CHEN Yue-jun1,PENG Yu-jing2,LIU Yue-wen2,SUN Gang2
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Abstract: “The Qinghezhen Group” was composed of the Siheshun, Beidagou, Wujiapuzi and Bailazi Formations. In the group, the Bailazi Formation was at the top of the group and was believed to be distributed to the south and north of the Qinghe fault. The formation was once discussed for the presence of microfossils of the deep water facies. The new results from present geological field work show that: to the north of the Qinghe fault, “the Bailazi Formation” is composed of calcmarble and of the metamorphosed volcanics of the alkalicbasalt, monzonitic andesitequartz keratophyre series and contains the Sinian microflora fossils. To the south of the Qinghe fault, “the Bailazi Formation” is composed of the magnesian marble, continental clastbearing quartz sandstone and the metamorphosed lavas of daciterhyolite series. The strata contain no stromatolites and microflora fossils which have been discovered in the middle Proterozoic strata in the adjacent Fanhe area to the west and were more intensively metamorphosed and deformed. Thus the strata are supposed to be the PaleoProterozoic. Hence, the strata of the socalled Bailazi Formation to the north and south of the Qinghe fault should belong to different strata composed of different rocks and formed in different tectonic units of different natures and in different sedimentary basins, thus should be dismembered. Now the Bailazi Formation to the north and south of the Qinghe fault can be called the Lujiapuzi and the Xibaoan Formationcomplex temporarily.
Key words: Lujiapuzi Formationcomplex, Xibaoan Formationcomplex, Bailazi Formation, Northern Liaoning Province, dismemberment
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CHEN Yue-jun,PENG Yu-jing,LIU Yue-wen,SUN Gang. Dismemberment of Bailazi Formation of the Qinghezhen Group[J].J4, 2006, 36(01): 24-0031.
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http://xuebao.jlu.edu.cn/dxb/EN/Y2006/V36/I01/24
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