湘南地区泥盆纪沉积特征及岩相古地理  

Sedimentological Characteristics and Lithofacies Palaeogeography of the Devonian in Southern Hunan Province

作　　者：邹光均 常博 曹创华 梁恩云 杨俊 凌跃新 李杰 Zou Guangjun;Chang Bo;Cao Chuanghua;Liang Enyun;Yang Jun;Ling Yuexin;Li Jie(Chengdu University of Technology,Chengdu Sichuan 610059;Hunan Institute of Geological Survey,Changsha Hunan 410116;Hunan Institute of Geological Hazard Investigation and Monitoring,Changsha Hunan 410116)

机构地区：[1]成都理工大学,四川成都610059 [2]湖南省地质调查所,湖南长沙410116 [3]湖南省地质灾害调查监测所,湖南长沙410116

出　　处：《国土资源导刊》2024年第2期33-42,共10页Land & Resources Herald

基　　金：湖南省地质院科技专项湖南骑田岭地区深部电磁结构建模应用及找矿方向研究(编号:hngstp202201);国家重点研发计划深地资源勘查开采重点专项(编号:2017YFC0601506)。

摘　　要：湘南地区位于扬子陆块和华夏陆块的结合带,泥盆纪沉积期受同生沉积断裂带控制明显,发育独特的“台—盆—丘—槽”古地理格局。通过对区内泥盆系剖面的详细研究,应用优势相成图法编制了泥盆系埃姆斯特阶、艾菲尔阶、吉维特阶、弗拉阶和法门阶岩相古地理图件,研究表明:下泥盆统至中泥盆统艾菲尔阶属陆相至碎屑滨浅海沉积体系,识别出河口湾、潮坪、泻湖等相及亚相;中泥盆统吉维特阶至上泥盆统法门阶属浅海碳酸盐沉积体系,识别出局限台地相、开阔台地相、台地边缘浅滩(粒屑滩)相、生物礁相以及台盆相等。系列图件的编制较为客观的反映了区内泥盆纪时期沉积盆地的形成、演化及相变迁移特征,对区内沉积型矿产及油气资源勘探具有一定的指导意义。The Southern Hunan region is located intermediate zone between Yangtze Block and Cathaysia Block,Which have a unique"platform-basin-hill-trough"paleogeographic pattern of the Devonian.Lithofacies have been investigated,on the basis of the Devonian sections collected during the field mapping projects.The lithofacies palaeogeography maps of the Emster,Eiffel,Givittian,Flavianand French stage are presented here.The lithofacies palaeogeographic analyses suggest that the coastal and shallow sea sedimentary system is further divided into such facies as estuary,tidal flat and lagoon facies during Lower Devonian to Middle Devonian.The carbonate platform sedimentary system is further divided into such facies as restricted platform,open platform,platform margin reef and platform basin during Middle Devonian to Upper Devonian.Results from this work improve the understanding of the Early Ordovician,and provide important information for evaluation of geological prospecting in the area.

关 键 词：湘南 泥盆纪 沉积特征 岩相古地理 

分 类 号：P531[天文地球—古生物学与地层学]