西南石油大学学报（自然科学版）2025，Vol.47Issue(5)：24-38,15.DOI:10.11885/j.issn.1674-5086.2024.07.21.02
川中北部地区下寒武统沧浪铺组沉积特征及演化模式
Sedimentary Characteristics and Evolution Model of Lower Cambrian Canglangpu Formation in Central and Northern Sichuan Basin
摘要
Abstract
To deepen the understanding of the sedimentary facies of the Lower Cambrian Canglangpu Formation in the northern part of the Sichuan Basin and clarify the favorable areas for the distribution of carbonate beaches.Based on core,logging,seismic and field outcrop data,this paper studies the sedimentary characteristics and evolution model of the Lower Cambrian Canglangpu Formation.The results show that:1)The sedimentary facies of Canglangpu Formation in the study area can be divided into four types:muddy water tidal flat facies,mixed platform facies,restricted platform facies and open platform facies.The muddy water tidal flat facies can be divided into two subfacies of intertidal zone and subtidal zone,and the lithology is mainly clastic rock.The mixed platform facies can be divided into two sub facies:platform flat and platform depression,which are dominated by mixed rock deposits.The restricted platform facies and the open platform facies are dominated by carbonate deposits.The former is dominated by dolomite,and the latter is dominated by limestone.2)From west to east,muddy water tidal flat facies,mixed platform facies,restricted platform facies and open platform facies are successively developed in the first member of Canglangpu Formation under the influence of western terrigenous debris injection and Deyang-Anyue rift trough.3)During the sedimentary period of the second member of Canglangpu Formation,the early rift trough was almost filled up,and the muddy water tidal flat facies was the main sedimentary facies.In summary,the favorable beach bodies in the study area are mainly developed in the restricted platform-open platform facies on the east side of the pre-rift trough.Affected by the rift trough and regression,the beach bodies gradually migrate eastward.关键词
沉积演化/沉积模式/下寒武统/沧浪铺组/四川盆地Key words
sedimentary evolution/sedimentary model/Lower Cambrian/Canglangpu Formation/Sichuan Basin分类
石油、天然气工程引用本文复制引用
屈海洲,杨诗媛,李居正,文思颖,周琳琅..川中北部地区下寒武统沧浪铺组沉积特征及演化模式[J].西南石油大学学报（自然科学版）,2025,47(5):24-38,15.基金项目
国家自然科学基金(42472174,42272181) （42472174,42272181）
中国石油-西南石油大学创新联合体科技合作项目(2020CX010301) （2020CX010301）
