中国西南四川盆地寒武纪沉积特征和岩相古地理

IF 4.2 Q2 ENERGY & FUELS
Lin Xie , Xuefei Yang , Yanhong Zhang , Yan Xu , Deming Zeng , Ruifeng Tang , Yao Du , Xingzhi Wang
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引用次数: 0

摘要

四川盆地的寒武纪发育了厚厚的黑色页岩、多种多样的碳酸盐岩和碎屑岩,它们沉积在不同的沉积环境中。位于长江上游地台的四川盆地记录了寒武纪的环境。通过对寒武纪详细的岩相分析,我们可以探讨当时的沉积环境和古地理环境。早寒武世沉积始于陆架层(琼珠寺层和沧浪铺层)的沉积。在这一阶段,四川盆地沉积了厚厚的页岩和碎屑岩。早寒武世末期,长江上游地台发育碳酸盐岩平台,四川盆地位于受限平台上(龙王庙地层)。中寒武统时期,四川盆地(豆豉溪地层)因不断退缩而形成滩涂和受限平台。在晚寒武世,四川盆地又位于碳酸盐岩平台(西乡池地层)。四川盆地寒武系有三种沉积体系:碎屑岩沉积体系、碎屑岩-碳酸盐混合沉积体系和碳酸盐沉积体系。纵向上,盆地呈现碎屑岩-碳酸盐岩沉积体系的演化特征。这三种沉积体系与寒武纪的三个 "过渡-回归 "周期相对应。早寒武纪初期的横断形成了下寒武统琼珠寺组的碎屑沉积系统。早寒武世后期的横断形成了中下寒武统的碎屑岩-碳酸盐混合沉积体系。晚寒武世初期的横断,形成了上寒武世西乡池组的碳酸盐沉积体系。随着晚新元大陆裂陷的结束,四川盆地进入稳定的克拉通盆地演化阶段,北部和西南部古陆发育。在琼珠寺-沧浪铺时期,盆地自西向东发育陆相沉积面;在龙王庙-西乡池时期,盆地自西向东发育潮汐平台-斜坡沉积面。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Sedimentary characteristics and lithofacies paleogeography of the Cambrian in Sichuan basin, Southwest China

Cambrian in Sichuan basin developed thick black shale, varies carbonate and clastic rock, which deposited in different sedimentary environment. Sichuan basin in the upper Yangtze platform contained a record of environment during the Cambrian. Detail facies analyses of Cambrian enable us to discuss the sedimentary environment and palaeogeographic setting. Sedimentation commenced in the Early Cambrian with the deposition of shelf facies (Qiongzhusi Formation and Canglangpu Formation). At this stage, thick shale and clastic rock deposited in Sichuan basin. At the end of the Early Cambrian, a carbonate platform developed in upper Yangtze platform, and Sichuan basin was located in restricted platform (Longwangmiao Formation). In the Middle Cambrian, tidal flat and restricted platform developed in Sichuan basin (Douposi Formation), because of continuous regression. During the Late Cambrian, Sichuan basin was located in carbonate platform again (Xixiangchi Formation). There are three types of sedimentary system in the Cambrian of Sichuan basin: clastic sedimentary system, clastics-carbonate mixed sedimentary system and carbonate sedimentary system. Vertically, the basin shows the evolutionary character of clastic-carbonate sedimentary systems. The three sedimentary systems correspond to three “transgression-regression” cycles of the Cambrian. The transgression in the initial period of the Early Cambrian led to the formation of clastic sedimentary system in the Qiongzhusi Formation of Lower Cambrian. The transgression in the later period of the Early Cambrian led to the formation of clastic-carbonate mixed sedimentary system in the Middle-Lower Cambrian. The transgression in the initial period of the Late Cambrian led to the formation of carbonate sedimentary system in the Xixiangchi Formation of Upper Cambrian. With the end of Late Sinian continental rifting ended, Sichuan basin entered a stable evolutionary stage of the craton basin, while the paleo-land developed in the north and southwest. In Qiongzhusi-Canglangpu period, the basin developed onshore-shelf sedimentary facies from west to east; In Longwangmiao-Xixiangchi period, the basin developed tidal flat-platform-slope sedimentary facies from west to east.

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来源期刊
Petroleum
Petroleum Earth and Planetary Sciences-Geology
CiteScore
9.20
自引率
0.00%
发文量
76
审稿时长
124 days
期刊介绍: Examples of appropriate topical areas that will be considered include the following: 1.comprehensive research on oil and gas reservoir (reservoir geology): -geological basis of oil and gas reservoirs -reservoir geochemistry -reservoir formation mechanism -reservoir identification methods and techniques 2.kinetics of oil and gas basins and analyses of potential oil and gas resources: -fine description factors of hydrocarbon accumulation -mechanism analysis on recovery and dynamic accumulation process -relationship between accumulation factors and the accumulation process -analysis of oil and gas potential resource 3.theories and methods for complex reservoir geophysical prospecting: -geophysical basis of deep geologic structures and background of hydrocarbon occurrence -geophysical prediction of deep and complex reservoirs -physical test analyses and numerical simulations of reservoir rocks -anisotropic medium seismic imaging theory and new technology for multiwave seismic exploration -o theories and methods for reservoir fluid geophysical identification and prediction 4.theories, methods, technology, and design for complex reservoir development: -reservoir percolation theory and application technology -field development theories and methods -theory and technology for enhancing recovery efficiency 5.working liquid for oil and gas wells and reservoir protection technology: -working chemicals and mechanics for oil and gas wells -reservoir protection technology 6.new techniques and technologies for oil and gas drilling and production: -under-balanced drilling/gas drilling -special-track well drilling -cementing and completion of oil and gas wells -engineering safety applications for oil and gas wells -new technology of fracture acidizing
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