CAJ | 학술논문

海拉尔盆地大磨拐河组所产孢粉化石分属于3个孢粉组合.下部孢粉组合以蕨类植物海金沙科孢子为主,重要分子有Cicatricosisporites australiensis, Cyathidites minor, C. gracilis, C. minutaestriatus, Appendicisporites problematicus, A.jonsonii,Pilosisporites verus, Impardecispora apiverrucata, I. purverulenta, Triporoletes reticulates, Aequitriradites echinatus等;中部孢粉组合则以两气囊花粉如Pinuspollenites, Piceaepollenites, Abietineaepollenites, Abiespollenites等占绝大多数,同时见少量被子植物花粉Asteropollis sp., Tricolpites sp.等;上部孢粉组合中裸子植物花粉略有减少,但仍占重要地位,重要分子有Cicatricosisporites australiensis, C. minutaestriatus,C. gushanensis, Impardecispora purverulenta ,Foraminisporites wonthagiensis, Aequitriradites verrucosus, Triporoletes singularis, T. reticulates, Polyporites? sp.等.上述孢粉组合大体可与松辽盆地登娄库组,黑龙江省东部城子河组、穆棱组,辽西地区沙海组、阜新组等对比,代表了中国北方早白垩世特有的植物群面貌,而其中Asteropollis, Tricolpites和Polyporites等被子植物花粉化石的发现,可能暗示大磨拐河组的时代为早白垩世中、晚期的巴列姆(Barremian)期-阿普第(Aptian)期,其上部可能上延至早阿尔必(Albian)期.
해랍이분지대마괴하조소산포분화석분속우3개포분조합.하부포분조합이궐류식물해금사과포자위주,중요분자유Cicatricosisporites australiensis, Cyathidites minor, C. gracilis, C. minutaestriatus, Appendicisporites problematicus, A.jonsonii,Pilosisporites verus, Impardecispora apiverrucata, I. purverulenta, Triporoletes reticulates, Aequitriradites echinatus등;중부포분조합칙이량기낭화분여Pinuspollenites, Piceaepollenites, Abietineaepollenites, Abiespollenites등점절대다수,동시견소량피자식물화분Asteropollis sp., Tricolpites sp.등;상부포분조합중라자식물화분략유감소,단잉점중요지위,중요분자유Cicatricosisporites australiensis, C. minutaestriatus,C. gushanensis, Impardecispora purverulenta ,Foraminisporites wonthagiensis, Aequitriradites verrucosus, Triporoletes singularis, T. reticulates, Polyporites? sp.등.상술포분조합대체가여송료분지등루고조,흑룡강성동부성자하조、목릉조,료서지구사해조、부신조등대비,대표료중국북방조백성세특유적식물군면모,이기중Asteropollis, Tricolpites화Polyporites등피자식물화분화석적발현,가능암시대마괴하조적시대위조백성세중、만기적파렬모(Barremian)기-아보제(Aptian)기,기상부가능상연지조아이필(Albian)기.