南京湖山黄龙组石灰岩微相分析与沉积环境演化  

Analysis on Sedimentary Environment Evolution of Limestone Microfacies of the Huanglong Formation in the Hushan Area,Nanjing,Jiangsu,China

作　　者：孟艳 李壮福[2] MENG Yan;LI Zhuang-fu(School of Resources and Geosciences,China University of Mining and Technology,Xuzhou Jiangsu 221008,China;Key Laboratory of Coalbed Methane Resource and Reservoir Formation Process,Ministry of Education,China University of Mining and Technology,Xuzhou Jiangsu 221116,China)

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221008 [2]中国矿业大学煤层气资源与成藏过程教育部重点实验室,江苏徐州221116

出　　处：《矿物岩石地球化学通报》2021年第3期699-710,共12页Bulletin of Mineralogy, Petrology and Geochemistry

摘　　要：对南京湖山地区黄龙组地层剖面微相的研究有助于理解晚石炭世下扬子地区的沉积环境、构造运动,对恢复下扬子板块古地理、古气候具有重要意义。研究表明,湖山地区黄龙组的岩石以泥晶颗粒灰岩为主,其次为亮晶颗粒灰岩和泥晶灰岩。根据岩石薄片特征识别出6大类、18种岩石微相类型,再根据各种微相类型的形成原因与条件及其在垂向上的变化规律,共划分出5种微相序列组合。主要微相类型及微相序列组合反映了黄龙组的沉积环境为开阔潮下带、局限潮下带、潮坪及浅滩环境。The study of the stratigraphic microfacies of the Huanglong formation in the Hushan area, Nanjing, is not only helpful to understand the sedimentary environment and tectonic movement of the lower Yangtze region in the late Carboniferous, but also of great significance to restore the paleogeography and paleoclimate of the lower Yangtze plate. The research shows that rocks of the Huanglong formation include major micritic granular limestone and minor sparry granular limestone and micritic limestone. Based on characteristics of the thin sections of rocks, 6 categories and 18 types of microfacies of rocks have been identified. In accordance with the formation reasons and conditions of various microfacies and the vertical variation regularity of those microfacies, five types of microfacies sequence combinations have been classified. The main types of microfacies and microfacies sequence combinations reflect that sedimentary environments of the Huanglong formation were open subtidal zone, limited subtidal zone, tidal flat, and shallow platform environments.

关 键 词：南京湖山 黄龙组 石灰岩微相 微相序列组合 

分 类 号：P588.2[天文地球—岩石学]