Late Palaeozoic palynomorph assemblages from the Karoo Supergroup and their potential for biostratigraphic correlation, Kalahari Karoo Basin, Botswana

Bulletin of geosciences

Modie BN¹  Le Hérissé A¹ 

关键词: Kalahari Karoo Basin;    Late Carboniferous-Permian;    pollen;    spores;    assemblage zones;   

DOI  :  

来源: Czech Geological Survey

【 摘 要 】

LateCarbonifeoustoPermiancoresamplesfromtwoboreholesections,STRAT1andCKP6,thatpenetratetheglacialtopostglacialandcoal-bearingLowerKaroosequence,KalahariKarooBasin,Botswana,containwellpreservedpollenandsporepalynomorphs.Thepalynomorphassemblagescomprise165speciesofsporesandpollen,andfewacritarchsandchlorophyceanalgae.Thispaperpresentsalocalbiozonationofthreesucceedingassemblagezones,recognisableineachboreholesection.Theassemblagezonesarenamed:theHamiapollenitesbullaeformisBiozone,theCyclogranisporitesgondwanensisBiozoneandthePlatysaccuspapilionis-StriatopodocarpitesfususBiozone,inascendingorderofstratigraphy.AssemblagesarecomparedandcorrelatedwithassemblagesdescribedfromotherGondwanaareasofAfrica,Australia,Arabia,SouthAmericaandAntarctica.AgeneralanalysisoftaxafromtheKalahariKarooBasinindicatesadistinctsimilaritywithassemblagesfromtheParanáBasinofSouthAmerica.TheHamiapollenitesbullaeformisBiozoneiscomparablewiththeVittatinacostabilisIntervalZoneoftheParanáBasin.AssemblagesfromtheCyclogranisporitesgondwanensisandthePlatysaccuspapilionis-StriatopodocarpitesfususzonesarecomparablewiththeLueckisporitesvirkkiaeIntervalZone.AgedeterminationfortheassemblagesintheKalahariKarooBasinisinferredfromcomparisonwithsimilarassemblagesfrompreviousGondwanastudies,andrangesfromtheLateCarboniferous(Kasimovian-Gzhelian)tolatestEarlyorpossiblyearliestMiddlePermian(LateCisulariantoEarlyGuadalupian).

【 授权许可】

Unknown