江苏晚古生代孢粉组合序列

结合新得的孢粉材料 ,总结了江苏泥盆纪—二叠纪孢粉组合序列 ,共计 7个组合 (带 ) :1)五通组下部观山段AL组合 (Fa2 b- c) ;　 2 )擂鼓台段中下部 L H组合 (Fa2 d) ;　 3)擂鼓台段中上部 L C组合 (Tn1 a— Tn1 b早期 ) ;　 4a)擂鼓台段顶部 MD组合 (Tn1 b晚期— Tn2 ) ;　 4b)“老坎组”MC组合 (Tn1 b晚期— Tn2 ) ;　 5 )高骊山组 DP组合(Tn3— V1 - 2 ) ;　 6 )龙潭组 GM组合 (P21 — P1 2 ) ;　 7)大隆组 CS组合 (暂名 ) (P22 )。简要介绍了每个组合的内容和特征并对某些地层的时代作了进一步讨论。

Succession of Late Palaeozoic Palynological Assemblages in Jiangsu

Based on the published data(Ouyang Shu & Chen Yong xiang,1987a、b、1989;Chen Yong xiang & Ouyang Shu,1985,1987;Lu,1994,etc.)and newly discovered material,the succession of the Late Palaeozoic palynological assemblages(zones)in Jiangsu Province are summarized.In ascending order,with the assumed ages they are: 1) the Aneurospora asthenolabrata Radiizonates longtanensis (AL)Assemblage(Fa 2 b c)from the Guangshan Member of the Wutung Formation in the suburbs(Longtan)of Nanjing; 2) the Retispora lepidophyta Apiculiretusispora hunanensis (LH)Assemblage(Fa 2 d)from the middle lower parts of the Leigutai Member of the Wutung Formation.in Jurong,Baoying and Longtan; 3) the Knoxisporites literatus Reticulatisporites cancellatus (LC)Assemblage(Tn 1 a-lower Tn 1 b)from the middle upper parts of the Leigutai Member in Jurong,Baoying and Longtan; 4a) the Auroraspora macra Dibolisporites distinctus (MD)Assemblage(upper Tn 1 b—Tn 2)from the uppermost part of the Leigutai Member in Baoying,Longtan,Kongshan and Chenjiabian, Jiangning; 4b) the Auroraspora macra Schopfites claviger (MC) Assemblage(roughly the same age as 4a probably from the “Laokan Formation” in Binhai of northern Jiangsu; 5) the Lycospora denticulata Reticulatisporites peltatus Assemblage(Tn 3—V 1-2 ) from the Gaolishan Formation in Jurong; 6) the Macrotorispora gigantea Patellisporites meishanensis Assemblage(P 2 1—P 1 2) from the Lungtan Formation. in a bore hole of southern Jiangsu;and 7) the Leiosphaeridia changxingensis Schizosporis (CS) Assemblage(tentatively named, P 2 2) possibly from the Dalong Formation (marine) of the same bore hole. The characteristics,correlation and age of each assemblage are introduced and deduced, especially the age of the LC Assemblage is discussed in some detail because Streel(1986) and Fairon Demaret(1986) believed it to be Early Caroniferous,the present author still insists the original dating of Tn 1 a lower Tn 1 b,i.e.the latest Strunian of Devonian or latest Famennian, on account of the Devonian plants Leptophloeum rhombicum and Archaeopteris mutatoformis occurring in the upper part of the Leigutai Member as well as palynological and stratigraphical grounds.