丙南组的新认识  

A NEW KNOWLEDGE OF THE BINGNAN FORMATION

作　　者：王洪峰[1] 纪相田[1] 马玉孝[1] 

机构地区：[1]成都理工学院地质学系,成都610059

出　　处：《成都理工学院学报》2001年第1期21-27,共7页Journal of Chengdu University of Technology

摘　　要：通过攀西地区丙南组露头及典型剖面研究 ,详细论述了丙南组的岩性组合特征及分段 ,首次提出丙南组在部分地区为海相沉积的新观点。丙南组的时代自曾繁礻乃先生 1945年于攀枝花丙南渡命名至今 ,皆因未发现化石而暂置晚三叠世。通过野外实地调查及相关资料研究 ,以古气候因素、与邻区早三叠世青天堡组对比 ,以及丙南组与上覆大荞地组的接触关系等多方面资料 ,提出丙南组的时代归属应为早三叠世。The authors discussed in detail the characteristics of the rock assemblage and inferred paleoenvironment of the deposited Bingnan Formation by studying the outcrop and typical section of the Bingnan Formation in Panxi area. They advances a new viewpoint for the first time that the paleoenvironment of the deposited Bingnan Formation is a marine sedimentary environment in partial region. Before now, many scholars used to refer tentatively the age of Bingnan Formation to Late Trassic Epoch because of no fossils. Now, the age of the Bingnan Formation is first assigned to Early Trassian on the basis of its paleoclimatical data , its correlation with the conterminous Qingtianbao Formation(T 1), and its contact with the overlying Daqiaodi Formation(T 3).

关 键 词：丙南组 早三叠世 海相沉积 攀西地区 岩石组合 古环境 

分 类 号：P534.51[天文地球—古生物学与地层学]