沉积学报2025，Vol.43Issue(5)：1857-1873,17.DOI:10.14027/j.issn.1000-0550.2024.131
硅质碎屑—碳酸盐混合沉积:进展与分类新启示
Mixed Siliciclastic-Carbonate:Progress and New Revelations in Classification
摘要
Abstract
[Significance]The study of detrital-carbonate mixed components can indicate paleoclimate,paleoenvi-ronment,provenance supply,and sea/lake-level change,and is closely related to mineral and oil&gas resources;thus,it has garnered increasing attention.[Progress]Mixed sediments can be mainly divided into compositional mix-ing(narrow sense)and structural mixing(broad sense).When considering mixed sediments as mixed sedimentary products,the previous classification mainly includes four,three,and two components.However,whether clay com-ponents should participate in the classification of mixed deposits remains controversial.This study provides a new classification method,and tries to solve the problem of component participation partitioning,which can provide new idea for the mixed sediments.[Conclusions]Based on the division of clastic and carbonate components,the hydro-dynamic conditions of the sedimentary period can be judged by quantitative statistics of fine sediment content.Com-pared with the traditional classification scheme,the four components of carbonate grains,detrital grains,(dolo)mi-crite,and clay are retained,and the visual presentation effect and convenient operation feasibility are considered.In addition,mixed sedimentation was redefined into four types:punctuated,facies,in situ,and precipitation mixing.Four processes that cannot reflect the original sedimentary environment,such as source,diagenetic,karst,and frac-ture mixing,are classified as false mixing.[Prospects]As two branches of sedimentology,carbonate and clastic rocks have been studied as independent subject systems.The study of mixed sediments is also expected to help im-prove our understand of the mineral sources,interaction modes,and deposition processes of carbonate-clastic compo-nents and improve the discipline system of clastic and carbonate rocks.关键词
混积岩/假混合作用/分类方案/碳酸盐岩/碎屑岩Key words
hybrid sedimentary rock/pseudo-mixed/classification scheme/carbonate rock/clastic rock分类
天文与地球科学引用本文复制引用
穆财能,周荟佳,陈安清,侯明才..硅质碎屑—碳酸盐混合沉积:进展与分类新启示[J].沉积学报,2025,43(5):1857-1873,17.基金项目
四川省科技计划创新群体项目(2023NSFSC1986)Sichuan Province Science&Technology Plan Innovation Group Project,No.2023NSFSC1986 （2023NSFSC1986）
