| 内蒙古平庄-元宝山盆地早白垩世植物化石及地层时代 |
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| 引用本文： | 邓胜徽.内蒙古平庄-元宝山盆地早白垩世植物化石及地层时代[J].现代地质,1998,12(2):168-172,T001. |
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| 作者姓名： | 邓胜徽 |
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| 作者单位： | 中国石油天然气总公司石油勘探开发科学研究院 |
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| 摘 要： | 内蒙古赤峰市东南部的平庄—元宝山盆地杏园组和元宝山组为含煤地层，时代归属有争议。杏园组所产６属７种植物，主要为早白垩世的常见分子，反映时代为早白垩世早期，相当于凡兰吟期到欧特里夫早期，与辽西的沙海组、内蒙古霍林河盆地霍林河组下含煤段和海拉尔盆地大磨拐河组可以对比。元宝山组含１９属２１种，主要为阜新植物群的常见代表，说明其时代为早白垩世中期，相当于欧特里夫晚期到巴雷姆期，可同辽西的阜新组、内蒙古的霍林河组上段和伊敏组相对比。
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| 关 键 词： | 内蒙古 平庄—元宝山盆地 早白垩世 植物化石 |
PLANT FOSSILS FROM EARLY CRETACEOUS OF PINGZHUANG YUANBAOSHAN BASIN, INNER MONGOLIA |
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| Abstract: | he plant fossils dealt with in this paper were collected from the Pingzhuang Yuanbaoshan basin, Inner Mongolia. The coal bearing strata, yielding plant fossils are the Xinyuan Formation and the Yuanbaoshan Formation. Seven species belonging to six genera: Onychiopsis psilotoides (Stokes et Webb)Ward, Dicksonia silapensis (Prynada)Meng et Chen, Ginkgo sibirica Heer, Gmanchurica (Yabe et Oishi)Meng, Taxus sp., Podozamites eichwaldii Schimp and Desmiophyllum sp. were found from the former formation and the age is considered as the early Early Cretaceous, probably Valanginian to early Hauterivian. The Yuanbaoshan Formation is rather richer in plant fossils, from which 21 species were discovered. All the species are Equisetites burejensis (Heer)Krysht, Acanthopteris gothani Sze, Coniopteris concinna (Heer) Chen et al., Csetacea (Prynada), Conychioides Vassilevskaja, Dicksonia silapensis (Prynada)Meng et Chen, Cladophlebis sp., Nilssonia sinensis Yabe et Oishi, Pterophyllum liaoningense Meng et Chen, Nilssoniopteris beyrichii (Schenk) Nathorst, Ginkgo manchurica (Yabe et Oishi) Meng, Sphenobaiera multipartita Meng et Chen, Phoenicopsis angustifolia Heer, Elatites harrisii Chow, Cunninghamia asiatica (Krassilov)Meng et al., Sequoia minuta Sveshn., Taxus intermedius (Hollick)Meng et Chen, Podozamites lanceolatus (Let H.)Braun, Pityophyllum landstroemi, Pityolepis sp., Stenovachis sp.. This plant assemblage is compared with the floras from the Fuxin Formation of the Fuxin basin, Liaoning and the Yimin Formation of Hailaer basin, Inner Mongolia. The age is assigned to the middle Early Cretaceous, possibly late Hauterivian to Barriemian. |
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| Keywords: | Inner Mongolia the Pingzhuang Yuanbaoshan basin Early Cretaceous plant fossil |
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