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河北兴隆中、上元古界旋回层序初步研究
引用本文:梅冥相,李志忠.河北兴隆中、上元古界旋回层序初步研究[J].地层学杂志,1998,22(2):102-108.
作者姓名:梅冥相  李志忠
作者单位:中国地质大学区域地质调查所
摘    要:以岩相及相序为基础,不同级别旋回层序及其有序叠加形式为研究核心,在进行1/5万区域地质调查的同时,对河北兴隆中、上元古界旋回层序特征进行了初步研究。将厚近万米、延续时间达10亿年左右的地层,划分为4个一级超层序、17个二级大层序、62个三级层序。三级层序的划分和识别建立在米级旋回层序及其有序叠加形式的基础之上。旋回性沉积记录的研究,为中、上元古界“系”的划分和建立提供了基本资料,一级超层序与银河年旋回存在成因联系。

关 键 词:旋回层序,中、上元古界,河北,兴隆

Preliminary Study on the Middle and Upper Proterozoic Cyclic sequences in Xinlong County, Hebei
Abstract:Based on the study of lithofacies and facies successions, cyclic sequences of var ious orders and their regularly vertical stacking patterns, the middle and upper Proterozoic are studied during the 1∶50 000 regional geological survey in Xinlong, Hebei, the strata are nearly 10 000 meters thick, the time span is about 100Ma±(1 800Ma-800Ma),4 first order supersequences and 17 second order megasequences constituted by 62 third order sequences are discerned in this set of strata. The division and discerning of third order sequences are based on meter scale cyclic sequences and their regularly vertical stacking patterns. The study of cyclic records of the middle and upper Pretozoic indicates that four first order supersequences are genetically related to the cycle of galactic year, all of which provide fundamental materials for the division of “system” in the Middle and Late Pretozoic.
Keywords:cyclic  sequences  Middle and Upper Pretozoic  Xinlong  Hebei  
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