沉积学报2024，Vol.42Issue(3)：1032-1046,15.DOI:10.14027/j.issn.1000-0550.2022.089
川东飞仙关组鲕粒滩岩性识别及其分布特征
Lithology and Distribution Characteristics of the Oolitic Beach from the Feixianguan Formation,Eastern Sichuan Basin
摘要
Abstract
[Objective]To solve the problems such as unclear lithological variations of the Feixianguan Formation on the western side of the marine trough's southern segment and within the plateau interior of the eastern part of the Si-chuan Basin,[Methods]the lithological types and characteristics of the Feixianguan Formation were studied by com-prehensively using multiple geological data such as cores,drilling and logging,and an intelligent identification method of lithological logging based on machine learning was proposed,which solved the technical problems of fine identifi-cation of lithology in the old area,and revealed the lithology,distribution and evolution of the Feixianguan Formation in the area.[Results and Conclusions](1)The Feixianguan Formation is mainly composed of lithology such as mudstone,mud crystal limestone,argillary limestone,granule limestone,granulous dolomite,mud crystal dolomite,paste dolomite,and gypsum rock;(2)Comparison found that the improved gradient-boosted decision tree algorithm,namely Stochastic Gradient Boosting Decision Tree(SGBDT),is superior to other algorithms for constructing lithology models,and is more suitable for carbonate rock complex lithology identification;(3)The granule limestone developed intensively in the area south of the Kaijiang-Liangping Sea Trough between Feixianguan I period and Feixianguan Ⅲ period,and the granulous dolomite was concentrated in the Feixianguan Ⅱperiod and distributed and scattered;(4)The distribution of the oolitic shoal in the area exhibits significant varia-tion.The main development of the plateau ancient geomorphological high point and the edge of the platform in the Feixianguan I period.In the Feixianguan Ⅱ period,most of the the oolitic shoal at the edge of the platform were developed,and a small number of ancient landforms in the platform were developed.And the main development of the plateau ancient geomorphological high point in the Feixianguan Ⅲ period.关键词
SGBDT算法/岩性识别/沉积演化/鲕粒滩分布特征/飞仙关组/川东Key words
stochastic gradient boosting decision tree(SGBDT)algorithm/lithology identification/sedimentary evolution/distribution characteristics of the oolitic beach/Feixianguan Formation/eastern Sichuan Basin分类
天文与地球科学引用本文复制引用
叶榆,程超,蒋裕强,易娟子,邓虹兵,李曦,谷一凡,陈雁..川东飞仙关组鲕粒滩岩性识别及其分布特征[J].沉积学报,2024,42(3):1032-1046,15.基金项目
国家自然科学基金项目(41430316) （41430316）
国家科技重大专项(2017ZX05008-004-008)[Foundation:National Natural Science Foundation of China,No.41430316 （2017ZX05008-004-008）
National Science and Technology Major Project,No.2017ZX05008-004-008] （）
