论文详情
碳酸盐斜坡沉积层序地层研究
石油实验地质
1999年 21卷 第2期
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Title
SEQUENCE STRATIGRAPHY STUDY OF CARBONATE SLOPE DEPOSIT
Authors
QIN Jianxiong
ZENG Yongfu
CHEN Hongde
TIAN Jingchun
单位
成都理工学院 沉积所, 四川 成都 610059
Organization
Institute of Deposit, Chengdu College of Technology, Chengdu, Sichuan 610059, China
摘要
通过右江盆地二叠系层序地层研究表明,在海平面升降旋回的各个时期,均有重力流的发育,并显示各自特征的层序内部构型和成因格架。低水位期以盆缘-下斜坡混屑浊积岩为特征,陆棚边缘体系域中重力流相对较少;海侵期重力流以钙屑碎屑流及其再改造砂沉积为主;高水位期重力流沉积厚度大、分布广、成因类型丰富,主要以钙屑塌积岩、颗粒流、液化沉积物流、碎屑流及浊流大量发育为特征。
Abstract
Study on the Permian Sequence Stratigraphy of the Youjiang Basin reveals that gravity flow develops during every period of eustatic cycles and it displays individual characteristic internal configuration and genetic framework of sequences.Lowstand is characterized by basin margin-downslope miscellaneous lithic turbidites,and gravity flow is relatively less in shelf marginal systems.During transgressive periods,gravity flow is dominated by calcarenaceous clastic flow and its recomposed sand deposit.The deposit of gravity flow in highstand has large thickness,wide distribution and rich genetic patterns,and is mainly characterized by well-developed calcarenaceous colluvial rocks,grain flow,liquefied sediment flow,clastic flow,and turbidity flow.
关键词：
层序地层;
斜坡体系;
层序格架;
重力流沉积;
Keywords:
Sequence Stratigraphy;
slope systems;
sequence framework;
gravity-flow deposit;
DOI
https://doi.org/10.11781/sysydz199902110
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