海南岛泥盆纪地层的发现及泥盆—石炭系界线划分  

THE DEVONIAN IN HAINAN ISLAND AND THE D/C BOUNDARY

作　　者：胡宁[1] 张仁杰[1] 冯少南[1] 

机构地区：[1]中国地质调查局宜昌地质矿产研究所

出　　处：《湖北地矿》2001年第4期2-6,共5页Hubei Geology & Mineral Resources

基　　金：地质行业科技发展基金(No.HY979820);国家自然科学基金:(No.49972094)

摘　　要：在海南岛昌江地区首次发现泥盆纪法门期牙形刺 Palmatolepis gracilis gracilis,P.gra-cilis sigmoidalis,Polygnathus germanus 等,并对原划分为早石炭世早期的 Cystophrentis kalaohoen-sis等珊瑚化石重新更正为晚泥盆世晚期,从而以确凿无疑的生物化石证据肯定了海南岛存在泥盆纪地层。根据含 Cystophrentis 珊瑚灰岩之上首次发现的海退事件沉积产物——砾岩和砂砾岩层,进一步确认两者以平行不整合面相分隔;通过岩石地层、层序地层和事件地层的综合分析,将海南岛泥盆-石岩系界线置于这套砾岩和砂砾岩之底。The Devonian Famennian Condonont fossils which include Palmatlepis gracilis gracilis, P. gracilis sigmoidalis, and Polygnathus germanus are discovered for the first time in the Changjiang area of Hainan Island. And the former early stage of the Lower Carboniferrous coral fossils, Cystophrentis kalaohoensis are classified to the late stage of the Upper Devonian Epoch. The regressive conglomerate and sandy conglomerate overlie Cystophrentis - bearing coral limestone through a proved parallel unconformity. The comprehensive analysis in petrological, sequential and event stratigraphy indicate that the boundary between Devonian and Carboniferrous lies below the above - mentioned conglomerate and sandy conglomerate.

关 键 词：泥盆纪 生物化石 泥盆-石炭系界线 多重地层划分 海南岛 砾岩 牙形刺 珊瑚化石 

分 类 号：P534.44[天文地球—古生物学与地层学]