| 鄂尔多斯盆地宜川地区二叠纪孢粉化石组合特征 |
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| 引用本文： | 高存山.鄂尔多斯盆地宜川地区二叠纪孢粉化石组合特征[J].山东国土资源,2018,34(11). |
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| 作者姓名： | 高存山 |
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| 作者单位： | 山东省第七地质矿产勘查院 |
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| 摘 要： | 通过对延长油矿延223井晚古生代孢粉组合研究以及古植被的恢复,探讨了该区晚古生代孢粉植物化石组合的地层学和古气候意义。根据孢粉化石主要属种的时代分布及其在各样品中百分含量的规律性变化,自下而上建立了3个孢粉组合:Gulisporites cochlearius-Laevigatosporites minimus组合、Sinulatisporites-Florinites组合和Lueckeisporites permianus-Platysaccus radialis组合。根据对划分孢粉组合的特征分析,通过与邻区及华北地区晚古生代孢粉组合的对比,探讨了孢粉组合的时代意义。通过孢粉组合,推测了相应时期的古植被类型,并与前人在相同地质时期所建立的大植物化石带进行了对比,分析了各地质时期植被的兴起、发展、繁盛以及衰退绝灭的历史过程,研究区二叠纪植物群属于典型的华夏植物群,反映了一种温暖潮湿的热带雨林气候,二叠纪晚期随着松柏类植物所占比例的增加,气候有变干旱的趋势。
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| 关 键 词： | 二叠系 孢粉化石组合 古植被 古气候 延223井 鄂尔多斯盆地 宜川地区 |
Characteristics of Permain Sporopollen Fossil Assemblages in Yichuan Area of Ordos Basin |
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| GAO Cunshan.Characteristics of Permain Sporopollen Fossil Assemblages in Yichuan Area of Ordos Basin[J].Land and Resources in SHANDONG Province,2018,34(11). |
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| Authors: | GAO Cunshan |
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| Abstract: | Through study on Paleozoic sporopollen fossil assemblage of No.223 Yan well of Yanchang oil field, and the restoration of ancient vegetation, the significance of stratigraphy and paleoclimate of late Paleozoic plants fossil of pollen assemblages has been studied. According to the longitudinal distribution of main species of pollen fossils and regular change of percentage contents in all samples, 3 assemblages have been set up from lower to upper part, they are Gulisporites cochlearius Laevigatosporites minimus, Sinulatisporites Florinites and Lueckeisporites permianus Platysaccus radialis. According to characteristics analysis on these pollen assemblages, through comparision with adjacent areas and North China, significance of the times of these pollen assemblages has been studied. Through the establishment of pollen assemblages, the ancient vegetation types of corresponding periods have been inferred, and compared with the plant fosills in the same geological period, the rise, development, thriving and recession extincti historical process of vegetation in various geological periods have been analyzed. The Permian flora in the study area is typical Cathaysia flora. It reflects a warm and humidtropical rain forest climate. Accompanying with the increase of pine and cypress plants in late Permian, climate became more drought. |
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| Keywords: | Permian sporopollen fossil assemblage ancient vegetation Paleoclimate No 223 Yan well Ordos basin Yichuan area |
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