桂林理工大学学报2025，Vol.45Issue(6)：825-836,12.DOI:10.3969/j.issn.1674-9057.2025.06.003
南华北盆地中东部山西组物源特征
Provenance characteristics of Shanxi Formation in the central-eastern part of southern North China Basin:evidence from sedimentary geochemistry
摘要
Abstract
The southern North China Basin is located in the southeastern North China Craton,at the junction of the North China and lower Yangtze plates.Investigating the provenance system is crucial to gain a deeper under-standing of the sedimentary pattern in this region.Focusing on the sandstones,siltstones,and mudstones in the Shanxi Formation in three wells drilled in the central part of southern North China Basin,this study conducted petrological and geochemical analyses of marine-continental transitional clastics in this formation.Using petrologi-cal and geochemical characteristic parameters,this study determined the provenance areas of the clastics and their tectonic settings.The results indicate that:1)both trace and rare earth elements exhibit relatively higher sensitiv-ity than major minerals in research into the provenance of marine-continental transitional clastics.2)Shanxi For-mation in the study area features a near-source,freshwater,neritic sedimentary environment that ranges from dys-oxic to oxygen-rich and from weakly reducing to weakly oxidizing conditions.3)This formation features a variety of sedimentary provenance areas.Sediments in the area originate primarily from uplifted continental island arcs,along with contributions from uplifted active continental margins and ancient passive continental margins.4)The Qinling-Dabie orogenic belt to the south serves as the provenance area of the clastics in the Shanxi Formation in the study area.The southern part of study area can be dated back to the early stage of the arc-continent collision,with primary provenance areas including continental island arcs and active continental margins.In contrast,the western part of the study area is formed in the late stage of the arc-continent collision.For its seaward side,the primary provenance areas consist of continental island arcs.For its landward side,the provenance areas prove to be a small number of uplifted paleo-passive continental margins of the North China Craton.关键词
山西组/海陆过渡相/地球化学/沉积环境/南华北盆地Key words
Shanxi Formation/marine-continental transitional face/geochemical/sedimentary environments/southern North China Basin分类
天文与地球科学引用本文复制引用
刘恩然,石砥石,乔鹏,郭天旭,王都乐,徐秋枫..南华北盆地中东部山西组物源特征[J].桂林理工大学学报,2025,45(6):825-836,12.基金项目
中国地质调查局油气资源调查中心基金项目(油科创[2023]-QN06号) （油科创[2023]-QN06号）
中国地质调查局项目(DD20240053 （）
DD20242060) （）
