| 太行山区的一些太古宙地层问题剖析 |
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| 引用本文： | 王启超,王琴廷,肖文暹,沈香萍.太行山区的一些太古宙地层问题剖析[J].地层学杂志,2008,32(4). |
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| 作者姓名： | 王启超 王琴廷 肖文暹 沈香萍 |
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| 作者单位： | 1. 河北省地勘局石家庄综合地质大队,河北石家庄,050081
2. 河北省地质调查院,河北石家庄,050081 |
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| 摘 要： | 相关论文对笔者所做狭义阜平群地层年龄的报道所做评论与实际不符,而其厘定地层生成年龄或为Sm-Nd等时值,但却是违背了所需具备的前提条件;或属侵入该群的岩体年龄;或为同侵入体年龄吻合的变质年龄。所述湾子群的碎屑锆石年龄等也为高级变质作用中H2O流体改造的再次均一化值;在空间分布上的亲缘关系也远大于新太古代五台群,并非所倾向的古元古代。赞皇群中部的原红鹤组被分离为古元古代官都群的依据与实际不符,解释有误。所称狭义阜平群最老层位索家庄组的命名地点实为花岗质侵入体所占据,所含麻粒岩为从北区移植至此。《中国地层典》所建阜平群的全部层序己被1/5万区调所改变。
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| 关 键 词： | 同位素年龄 阜平群 湾子群 官都群 赞皇群 索家庄组 太古宙 太行山区 河北 |
SOME PROBLEMS OF ARCHEAN STRATA IN THE TAIHANG MOUNTAINS |
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| WANG Qi-chao,WANG Qin-ting,XIAO Wen-xian,SHEN Xiang-ping.SOME PROBLEMS OF ARCHEAN STRATA IN THE TAIHANG MOUNTAINS[J].Journal of Stratigraphy,2008,32(4). |
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| Authors: | WANG Qi-chao WANG Qin-ting XIAO Wen-xian SHEN Xiang-ping |
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| Abstract: | This is a reply to comments in Journal of Stratigraphy on our report of the age of the Fuping Group.The ages of the Fuping Group proposed in their paper are up to interpretation.One of their ages is a Sm-Nd isochron age.Another is the age of an intrusive rock,and the third is the metamorphic age consistent with the intrusive.In fact,the detrial zircon age of the Wanzi Group they used was reset during the peak metamorphism due to hydrothermal fluid activities.The relationship between the Wanzi Group and Fuping Group in their spatial distribution is much closer than their relationship with the Neoarchean Wutai Group.The age of the Wanzi Group is unlikely Paleoproterozoic.The separation of the Honghe Formation from the Zanhuang Group and the renaming of this as the Paleoproterozoic Guandu Group is problematic too.The area where the Suojiazhuang Formation of the oldest Fuping Group was described is actually occupied by granitic intrusives.The granulites in this area are allochthonous rocks from the north.All of the stratigraphic sequences of the Fuping Group in the Chinese Stratigraphic Code have been modified and updated in the 1/50,000 regional geological survey. |
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| Keywords: | isotopic age Fuping Group Wanzi Group Guandu Group Zanhuang Group Suojiazhuang Formation Archean Taihang Mountains Hebei |
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