太行山中南段长城系赵家庄组沉积特征

发布时间：2018-07-08 21:39

  本文选题：前寒武纪 + 赵家庄组　； 参考：《西南石油大学学报(自然科学版)》2017年04期

【摘要】：前寒武纪沉积地层多因地质时代久远而受到过变质作用的强烈改造,因而沉积作用过程研究难度较大且较为薄弱。以详细的野外地质剖面测制工作为基础,结合区域地质背景资料分析,通过野外岩石类型鉴定、沉积构造鉴别及室内岩相古地理综合分析等,发现太行山中南段长城系赵家庄组发育陆相→海相的沉积岩相组合,主要形成环境为冲积扇相→潮坪相,地层顶底界线清晰,易于识别。赵家庄组完整的地层层序可划分为4段,包括粗碎屑岩层、砂岩页岩互层、页岩层和叠层石藻礁层,岩石类型丰富,地层沉积特征明显,具有明显的沉积环境指示作用,可以作为地质工作者进一步研究前寒武纪沉积环境及早期古生物的一个窗口。
[Abstract]:Most of the Precambrian sedimentary strata were strongly modified by metamorphism because of the long geological age, so the study of sedimentary process is difficult and relatively weak. On the basis of detailed field geological profile survey and analysis of regional geological background data, through field rock type identification, sedimentary structure identification and comprehensive analysis of indoor lithofacies and paleogeography, etc. It is found that the sedimentary lithofacies assemblage of marine facies developed in the Great Wall system of the Great Wall system in the central and southern Taihang Mountains. The main formation environment is alluvial fan facies and tidal flat facies. The boundary between the top and the bottom of the strata is clear and easy to identify. The complete stratigraphic sequence of Zhaojiazhuang formation can be divided into 4 sections, including coarse clastic rock, sandstone shale interbed, shale and stromatolite algal reef. It can be used as a window for geologists to further study the Precambrian sedimentary environment and early paleontology.
【作者单位】： 河北地质大学资源学院;
【基金】：国家自然科学基金(41172118) 河北省自然科学基金(D2013403018,D2012403010) 河北省教育厅青年基金(QN2015255)
【分类号】：P512.2
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本文编号：2108819