| 吐鲁番拗陷中侏罗世孢粉植物群及古环境 |
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| 引用本文： | 王永栋,江德昕.吐鲁番拗陷中侏罗世孢粉植物群及古环境[J].沉积学报,1997,15(3):133-140. |
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| 作者姓名： | 王永栋 江德昕 |
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| 作者单位： | 1 (中国科学院南京地质古生物研究所,南京 210008; |
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| 摘 要： | 根据吐鲁番拗陷葡１井和草南１井中侏罗世的孢子花粉化石及其组合特征，研究孢粉植物群、古植被面貌及古生态环境，探讨中侏罗世的古气候性质、演变及其对聚煤作用和油气生成的影响。
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| 关 键 词： | 中侏罗世 孢粉植物群 古生态 古气候 吐鲁番拗陷 |
| 收稿时间： | 1997-05-13 |
Middle Jurassic Palynoflora and its Palaeoenvironmental Implication in Turpan Depression,Xinjiang |
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| Wang Yongdong \ Jiang Dexin \ Yang Huiqiu,and Sun Feng.Middle Jurassic Palynoflora and its Palaeoenvironmental Implication in Turpan Depression,Xinjiang[J].Acta Sedimentologica Sinica,1997,15(3):133-140. |
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| Authors: | Wang Yongdong \ Jiang Dexin \ Yang Huiqiu and Sun Feng |
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| Institution: | 1 Nanjing Institute of Geology and Palaeontology,Academia Sinica,Nanjing 210008;2 Lanzhou Institute of Geology,Academia Sinica,Lanzhou 730000 |
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| Abstract: | The terrestrial sediments are well developed in the Turpan Hami Basin in eastern Xinjiang,which show the important petroliferous and coal bearing significance.Abundant fossil spores and pollen grains of 97 species assigned to 45 genera are recovered from the Middle Jurassic Xishanyao,Sanjianfang and Qiketai Formations of Boreholes PU1 and CN1 in Turpan depression.Three palynological assemblage zones representing Aalenian to Bajocian,early Bathonian and late Bathonian are recognized as:1) Cyathidites Cycadopites Quadraeculina (CCQ) Zone;2) Cyathidites Classopollis Piceites (CCP) Zone and 3) Granulatisporites Classopollis Podocarpidites (GCP) Zone.The Middle Jurassic palynoflora is dominanted by conifers,ginkgo cycads as well as ferns.From Aalenian Bajocian to late Bathonian,ferns represented by Cyatheaceae,Dicksoniaceae and Osmundaceae gradually decreased,while conifers including Coniferales,Pinaceae,Podocarpaceae and especially Cheirolepidiaceae increased in abundance.The palynoflora indicates a warm and humid climate in Aalenian to Bajocian,and somewhata semi arid and hot climate condition in early to middle Bathonian.The warm humid climate is favorable for the accumulation of coal,oil and gas resources,while the arid and hot climate results in the weakness and even termination of hydrocarbon formation. |
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| Keywords: | Middle Jurassic\ palynoflora\ paleoecology paleoclimate\ Turpan depression |
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