摘要
根据熊耳群顶部古风化壳的确立、汝阳群底部小沟背组下切河谷沉积特征、白草坪组大型具刺疑源类和洛峪口组宏观藻类的发现以及罗圈冰碛岩在地层柱中的对比位置,笔者对熊耳群之上至寒武系辛集组之下的地层进行了重新厘定,将其归入新元古界(1000～570Ma),代表华北地台在Rodinia超大陆聚合-离散期的沉积记录(青白口系和震旦系)。
According the ancient weathering crust at top of the Xiong' er Group,incised valley deposits in the Xiaogoubei Formation at the base of the Ruyang Group,discovery of large-sized acanthomprphidia acritarchs in the Baicaoping Formation and megafossil algae in the Luoyukou Formation and location of the Luoquan tillite in the Neoproterozoic column ,the authors consider that the strata above the Xiong' er Group and below the Cambrian Xinji Formation should be assigned to the Neoproterozoic(1000to570Ma B.P.)and are the sedimentary Qingbaikou System and Sinian System)records of the assembly and breakup of the supercontinent Rodinia(Qingbaikou System and Sinian System)in the North China plat-form.
出处
《地质通报》
CAS
CSCD
北大核心
2002年第3期130-135,共6页
Geological Bulletin of China
基金
地矿部地质行业科学技术发展基金(HY979819)
国土资源部地调局专项DKD2001007)
科学技术部"九五"攀登专项(95-专-01-3-3)
关键词
熊耳群
下切河谷沉积
罗圈冰碛岩
新元古代
地层
华北地台
Xiong' er Group
incised valley filling
Luoquan tillite
Neoproterozoic
southern margin of the North China platform
