辽东半岛南部的石炭-二叠系界线  

THE BOUNDARY BETWEEN CARBONIFEROUS AND PERMIAN SYSTEMS IN THE SOUTH OF LIAODONG PENINSULA

作　　者：陈为公 范国清 

机构地区：[1]辽宁省地质矿产研究院,辽宁沈阳110032

出　　处：《辽宁地质》2000年第3期213-218,共6页

摘　　要：辽东半岛南部的太原组属石炭－二叠系(C－P)过渡层，其海相灰岩发育，类、牙形类等海相化石丰富，是东北南部和华北C－P界线研究较为理想的地区。目前国际上以牙形类化石Streptognathodusisolatus的首现为二叠系的底界，该牙形类化石的首现在我国尚难以确定，而以类Pseudoschwagerina(Sphaeroschwagerina)带的底界作为C－P界线已得到更多研究者的支持。与之相对应，辽东半岛南部太原组中上部类可归结为Sphaewoschwagerina－Rugosofusulina(SR)组合带，可作为C－P界线。ThemarinelimestoneofCarboniferous-PermiansystemsinTaiyuanF.inthesouthofLiaodongpeninsulaisdevelopedwellandcontentsanumberofmarinefossils,suchasFusulinidandConodot.ThesouthofLiaodongpeninsulaisafavourableareaforstudyingtheboundarybetweenCarboniferousandPermiansystemsinthesouthNortheastandNorthChina.InternationallyitiswidelyacceptedthatthestratigraphicpositionwhereStreptognathodusisolatusisfirstdiscoveredshoudbethebottomboundaryofPermiansystem.ButinChina,theplacewheretheConodotfossilisfirstdiscoveredisdifficulttoidentified.MoreandmorepaleotologistsinChinaconsiderthatthebottomboundaryofPseudoschwagerinazoneisusedastheboundarybetweenCarboniferousandPermiansystems.InthesouthofLiaodongpeninsula,Sphaeroschwageina-Rugosofusulina(SR)assemblagezone,whichisconcordantwithPseudoschwagerina,canbeusedastheboundarysignofCarboniferousandPermiansystems.

关 键 词：辽东半岛 石炭-二叠系 界线 牙形类 

分 类 号：P534[天文地球—古生物学与地层学]