摘要
通过对川北中三叠统钻井取心、岩屑录井、地球物理测井等资料的研究,进行了碳酸盐岩-蒸发特征的膏(盐)岩米级旋回岩石的叠置样式剖析、剖面上米级旋回划分以及Fischer图解的绘制、可容空间分析、构造-层序岩相古地理图的绘制。结果表明:川北中三叠统发育2个Ⅲ级层序,存在2个周期的可容空间变化。该时期沉积相带主要受包括西部巴彦喀拉海、秦岭海槽海侵与海退因素以及印支早幕全区构造格局因素的共同制约,下部层序内沉积特征相对上部层序更为局限,上部层序是藻颗粒的重要发育时期。
According to the researches of core,cuttings and logging data,the paper makes the summary of Milankovich lithology styles and the division of Milankovich cycles in the section.Then,the Fischer plot is drawn and the accommodating space is analysed.Finally,the tectonic-sequence lithofacies-paleogeographic map of the Middle Triassic series is drawn.The results suggest that there are two 3th order sequences and two A/S cycles in the Middle Triassic Series.In this period,the sedimentary facies are mainly controlled by the sea level of Bayan Kara Sea,the Tsinglingense trough and the structural framework of the Hercynian-Indochina period.Contrary to the lower sequence,the facies are more opened in the upper sequence,where mainly develop the algae more.
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第1期61-67,共7页
Journal of Chengdu University of Technology: Science & Technology Edition
基金
国家科技重大专项(2011ZX05005-002)
关键词
中三叠统
层序
Fischer图解
可容空间
沉积演化
Middle Triassic series
Ⅲ-order sequence
Fischer plot
accommodation space
facies evolution
