| 新疆和田杜瓦地区晚二叠世孢粉组合 |
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| 引用本文： | 侯静鹏.新疆和田杜瓦地区晚二叠世孢粉组合[J].新疆地质,1990(1). |
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| 作者姓名： | 侯静鹏 |
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| 作者单位： | 中国地质科学院地质研究所 |
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| 摘 要： | 本文论及所研究的新疆塔里木盆地和田地区原来分别属于叶尔羌群(J_(1-2))和二叠—三叠系(杜瓦组上部)两个部分采集的孢粉化石.沉积物中含有多种对地层研究非常重要的生物化石,如介形虫、叶肢介、鱼及孢粉等.根据孢粉组合的研究,这些地层可视为上二叠统,其孢粉组合以裸子植物花粉占主导地位为特征,可与新疆吉木萨尔县大龙口晚二叠世晚期地层梧桐沟组对比,并相当于西欧的镁灰岩统和苏联的鞑靼阶.
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| 关 键 词： | 晚二叠世 孢粉组合 裸子植物 无肋双囊粉 |
LATE PERMIAN SPORES AND POLLEN ASSEMBLACE IN DUWA DISTRICT, HOTAN, XINJIANG |
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| HOU Jingpeng.LATE PERMIAN SPORES AND POLLEN ASSEMBLACE IN DUWA DISTRICT, HOTAN, XINJIANG[J].Xinjiang Geology,1990(1). |
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| Authors: | HOU Jingpeng |
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| Abstract: | This paper deals with the research on the fossil sporo-pollen collected from the Yarkant Group ( J1-2 ) and the Permian-Triassic strata (upper part of Duwa Formation P2d) . in two sections in Hotan district of Tarim basin, Xinjiang respectively. The sediments are contain various fossils, such as ostracods, conchostracans, fish and sporo-pollen, which are stratigraphically very important. According to the study on the sporopollen assemblage from the sections, the strata can be considered to belong to the Upper Permian.
The assemblage is characterized by the dominance of the gymnospermous pollen, which generally attains 87-95% of the total number. They are mainly non striate bisaccate pollen grains as follows: Alisporites sublevis, A. tenuicorpus, A. hotanensis, Pteruchipollenites reticorpus, Falcisporites nuthallensis, F .zapfei,Klausipollenites scha-ubergeri, Vitreisporites Pallidus, Platysaccus minus, Bactrosporites longiformis , Sul-catisporites luminosus, Limitisporites rhombicorpus, Illinites. In which of them the most abundant striate bisaccate pollen grains are Protohaploxypinus and its species: P. ovaticorpus, P. latissimus,P. cf. volaticus, P. dilutatus, P. prefectusi P. samoilo-vichii. The other species are Lueckiasporites virkkiae, Striatopodocarpites tojmensis.S. cancellatus, S. lineatus. Taeniaesporites noviaulensis, T. novimundi, T. symmetricus, Striatoabieites richteri, Hamiapollenites exolescus and Vittatlna. Besides, Pteridophytic spores only occupy 5-13%.
Based on the characteristics of the spores and pollen assemblage its strata can be correlated with the Wutonggou Formation of Dalongkou, Xinjiang. Externally, it is equivalent to the Zechstein of West Europe and the Tatarin of USSR. |
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| Keywords: | late Permian spores and pollen assemblage gymnosperm non striate bisaccate pollen |
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