大兴安岭中南部宝日勿苏地区宝D1井早白垩世孢粉化石
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摘要
通过对大兴安岭中南部宝日勿苏地区地质调查井宝D1井井深22~255.70 m井段发现的孢粉化石的系统分析研究,共获得孢粉化石47属65种(包括未定种).根据孢粉化石属种类型及其含量和变化特征,将孢粉化石组合划为Lycopodiacidites-Densoisporites-Piceaepollenites组合,时代为早白垩世早期,孢粉化石赋存地层相当于白音高老组.通过系统分析孢粉组合中主要孢粉属种及其母体植物的生长环境,推测大兴安岭中南部地区在早白垩世早期为暖温带-亚热带气候条件.同时旱生植物的大量出现,表明该区在早白垩世早期受到了干旱气候的影响,但与典型的干旱环境不同,推断与当时的火山活动有关.
With systematic studies on the sporopollen fossils discovered from the section of 22-255.70 m of B-D1 well in Bor Us area,central-southern Daxinganling Mountains,47 genera and 65 species(including undefined species)are obtained. According to their palynomorphs,contents and variation characteristics,the sporopollen fossils are assigned to the Lycopodiacidites-Densoisporites-Piceaepollenites assemblage with geological age of early stage of Early Cretaceous.The host stratum is corresponding to the Baiyingaolao Formation. Based on the analysis on the growing environment of major species and their parent plants,it is inferred that the central-southern Daxinganling Mountains were in warm temperate-subtropical climate conditions during the early stage of Early Cretaceous. In the meantime,the appearance of a large number of xerophytes indicates the influence of drought but different from typical arid environment,which is possibly related to volcanic activity at the time.
With systematic studies on the sporopollen fossils discovered from the section of 22-255.70 m of B-D1 well in Bor Us area,central-southern Daxinganling Mountains,47 genera and 65 species(including undefined species)are obtained. According to their palynomorphs,contents and variation characteristics,the sporopollen fossils are assigned to the Lycopodiacidites-Densoisporites-Piceaepollenites assemblage with geological age of early stage of Early Cretaceous.The host stratum is corresponding to the Baiyingaolao Formation. Based on the analysis on the growing environment of major species and their parent plants,it is inferred that the central-southern Daxinganling Mountains were in warm temperate-subtropical climate conditions during the early stage of Early Cretaceous. In the meantime,the appearance of a large number of xerophytes indicates the influence of drought but different from typical arid environment,which is possibly related to volcanic activity at the time.
引文
[1]宋之琛,尚玉珂,刘兆生,等编.中国孢粉化石(第二卷)中生代孢粉[M].北京:科学出版社,2000:3-578.
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[13]余静贤,苗淑娟.延边地区早白垩世孢粉组合[J].中国地质科学院天津地质矿产研究所所刊,1983,4:55-79.
[14]宋之琛,刘耕武,黎文本,等.内蒙古二连盆地早白垩世孢子花粉[C]//内蒙古二连盆地早白垩世介形类和孢子花粉.合肥:安徽科技出版社,1986:106-334.
[15]程金辉,尚玉珂.内蒙古满洲里扎赉诺尔煤矿早白垩世孢粉组合序列和古气候研究[J].古生物学报,2015,54(3):316-341.
[16]张春彬.黑龙江鸡西穆棱组孢子及其地层意义[J].中国科学院南京地质古生物研究所,1965,4:163-198.
[17]中国科学院北京植物研究所古植物研究室孢粉组.中国蕨类植物孢子形态[M].北京:科学出版社,1976:1-381.
[18]黎文本,尚玉珂.鄂西中生代含煤地层中的孢粉组合[J].古生物学报,1980,19(3):201-219.
[2]Norris G.Miospores from the Purbeck beds and marine Upper Jurassic of southern England[J].Palaeontology,1969,12(4):574-620.
[3]赵传本.孢粉学的侏罗-白垩系界线划分标志[J].大庆石油地质与开发,1985,4(4):1-10.
[4]Dettmann M E.Upper Mesozoic microfloras from South-Eastern Australia[C]//Proc Roy Soc Vict,1963,77(1):1-152.
[5]钱丽君,等.陕西北部侏罗纪含煤地层及聚煤特征[M].西安:西北大学出版社,1987:1-202.
[6]张望平.新疆准噶尔盆地侏罗纪孢粉组合[C]//新疆北部二叠纪至第三纪地层及孢粉组合.北京:中国环境科学出版社,1990:57-96.
[7]蒲荣干,吴洪章.黑龙江东部晚中生代地层的孢子花粉[J].中国地质科学院沈阳地质矿产研究所所刊,1982,5:383-456.
[8]黎文本.吉林蛟河早白垩世孢粉组合[J].中国科学院南京地质古生物研究所集刊,1984,19:67-119.
[9]刘兆生.山西大同早、中侏罗世孢粉组合[C]//古植物学与孢粉学文集1号.南京:江苏科学技术出版社,1986:85-124.
[10]蒲荣干,吴洪章.辽宁西部中生界孢粉组合及其地层意义[C]//辽宁西部中生代地层古生物(2).北京:地质出版社,1985:121-212.
[11]吴洪章,张心丽.辽宁北票组上含煤段孢粉组合[J].古生物学报,1983,22(5):564-572.
[12]蒲荣干,吴洪章.辽西中侏罗世孢粉组合[J].中国地质科学院沈阳地质矿产研究所所刊,1982,4:169-184.
[13]余静贤,苗淑娟.延边地区早白垩世孢粉组合[J].中国地质科学院天津地质矿产研究所所刊,1983,4:55-79.
[14]宋之琛,刘耕武,黎文本,等.内蒙古二连盆地早白垩世孢子花粉[C]//内蒙古二连盆地早白垩世介形类和孢子花粉.合肥:安徽科技出版社,1986:106-334.
[15]程金辉,尚玉珂.内蒙古满洲里扎赉诺尔煤矿早白垩世孢粉组合序列和古气候研究[J].古生物学报,2015,54(3):316-341.
[16]张春彬.黑龙江鸡西穆棱组孢子及其地层意义[J].中国科学院南京地质古生物研究所,1965,4:163-198.
[17]中国科学院北京植物研究所古植物研究室孢粉组.中国蕨类植物孢子形态[M].北京:科学出版社,1976:1-381.
[18]黎文本,尚玉珂.鄂西中生代含煤地层中的孢粉组合[J].古生物学报,1980,19(3):201-219.