西南石油大学学报(自然科学版) ›› 2017, Vol. 39 ›› Issue (4): 47-56.DOI: 10.11885/j.issn.16745086.2016.03.22.04

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Depositional Characteristics of the Zhaojiazhuang Formation, Changcheng System, in the Middle–Southern Areas of the Taihang Mountains

WANG Qingchun, HE Ping, DU Jiangmin, LIU Rongfang, LI Wei   

  1. The College of Resources, Hebei GEO University, Shijiazhuang, Hebei 050031, China
  • Received:2016-03-22 Revised:2017-03-02 Online:2017-08-01 Published:2017-08-01

Abstract: As Precambrian sedimentary strata have likely been rigorously transformed due to metamorphism over a long period of geological time, studies on this sedimentary process are often challenging and yield unconvincing results. Employing a detailed field geological profile analysis, combined with an analysis of the regional geological background, we identified rock types and sedimentary structures, and conducted a comprehensive analysis of lithofacies and palaeogeography. Our results showed that the terrestrial→marine sedimentary facies in the Zhaojiazhuang Formation, Changcheng system of the mid-southern areas in the Taihang Mountains were formed mainly by alluvial fan facies→tidal flat facies. The boundary between the top and bottom layers was clearly visible and identifiable. The complete stratigraphic sequence of the Zhaojiazhuang Formation can be divided into four sections:coarse clastic rock, sandstones/shale interbed, shale, and layered limestone reef. The rock types are abundant, and the stratigraphic sedimentary characteristics are prominent. These features are significant indicators of the sedimentary environment and can be used by geologists to study the Precambrian sedimentary environment and early paleontology.

Key words: Precambrian, Zhaojiazhuang Formation, depositional characteristics, North China Craton, alluvial fan facies, tidal flat facies

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