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浙江大学学报（理学版）
浙江大学学报（理学版）  2016, Vol. 43 Issue (1): 57-63    DOI: 10.3785/j.issn.1008-9497.2016.01.010
地球科学     
徐州-淮北地区张渠组层序地层格架
Sequence stratigraphic framework of Zhangqu Formation in Xuzhou-Huaibei area
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摘要： 因新元古代地层缺少古生物化石，地层对比至今仍是难点.徐州淮北是衔接我国南北新元古代地层对比的关键地区，其中张渠组是新元古代地层对比的关键层位.以露头界面识别和米级旋回叠置规律研究为基础，利用沉积过程中发生的重要沉积事件——最大海泛事件、风暴事件及臼齿碳酸盐岩事件，并结合费希尔图解和海进海退经水深校正建立海平面变化曲线等层序划分对比方法，实现了对张渠组地层的等时性划分对比，将张渠组划分为6个三级层序，建立了张渠组层序地层对比格架.根据Sr同位素测年资料，张渠组底部和顶部绝对年龄分别为811 和792 Ma，每个三级层序的年限约为3.1 Ma.
关键词： 张渠组;  层序地层;  海平面变化;  新元古代;  徐州-淮北地区    
Abstract: s the key region to bridging the stratigraphic correlation of Neoproterozoic in Chinas northern and southern region, thus Zhangqu Formation is the key position of Neoproterozoic stratigraphic correlation. Therefore, it is necessary to establish the sequence stratigraphic framework of Zhangqu Formation. This study is based on the identification of the outcrop interface and the research of the regularly vertical stacking patterns of the meterscale cyclic sequences, and uses the important events of the sedimentary processes, namely the maximum flooding events, storm sedimentary events and molartooth carbonate events. Combing with the Fischer diagram and the transgressionregression by water depth correction of sea level change curves, the isochronous stratigraphic division and correlation of the Zhangqu formation are implemented and achieved. Zhangqu Formation is divided into six thirdorder cyclic sequences, and the sequence stratigraphic correlation framework is established. According to the Sr isotope dating data, the absolute geological ages of the bottom and top of Zhangqu Formation are 811 and 792 Ma, respectively, and the geological age of every thirdorder cyclic sequence is about 3.1 Ma.
出版日期: 2016-03-31
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刘为付

引用本文:

刘为付. 徐州-淮北地区张渠组层序地层格架[J]. 浙江大学学报（理学版）, 2016, 43(1): 57-63.

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https://www.zjujournals.com/sci/CN/Y2016/V43/I1/57

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