| 青海曲麻莱盆地红层JScJ7zfzneDfspDrffPs（希指蕨孢）的发现及其意义 |
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| 引用本文： | 段其发,涂兵,汤朝阳,赵小明,白云山.青海曲麻莱盆地红层JScJ7zfzneDfspDrffPs（希指蕨孢）的发现及其意义[J].地层学杂志,2012(1):31-36. |
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| 作者姓名： | 段其发 涂兵 汤朝阳 赵小明 白云山 |
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| 作者单位： | 武汉地质矿产研究所 |
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| 基金项目： | 中国地质调查局青海1/25万《曲麻莱县幅》区域地质调查项目(编号:200313000006)资助 |
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| 摘 要： | 青海南部沱沱河地区陆相红层分布广泛，确定这些红层的时代对认识青藏高原的形成过程具有重要意义。由于红层中化石稀少，因此，这些地层的形成时代长期以来未有定论。曲麻莱盆地是沱沱河盆地东部的一个次级盆地，在该盆地红层之中部灰色钙质泥岩中获得了相当数量的孢粉化石，其中希指蕨孢子居绝对优势，据此确定含化石的地层地质时代属晚白垩世。...
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| 关 键 词： | 孢粉 希指蕨孢 陆相红层 生物地层 白垩纪 曲麻莱盆地 青海 |
DISCOVERY OF SCHIZAEOISPORITES FROM THE QUMALAI BASIN,QINGHAI AND ITS GEOLOGICAL SIGNIFICANCE |
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| DUAN Qi-fa,TU Bin,TANG Chao-yang,ZHAO Xiao-ming and BAI Yun-shan.DISCOVERY OF SCHIZAEOISPORITES FROM THE QUMALAI BASIN,QINGHAI AND ITS GEOLOGICAL SIGNIFICANCE[J].Journal of Stratigraphy,2012(1):31-36. |
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| Authors: | DUAN Qi-fa TU Bin TANG Chao-yang ZHAO Xiao-ming and BAI Yun-shan |
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| Institution: | Wuhan Institute of Geology and Mineral Resource,Wuhan 430069 |
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| Abstract: | Terrigenous red beds overlying Jurassic and pre-Jurassic strata are widely distributed in northern Qinghai-Tibet plateau,and can provide geological and sedimentological information about the uplift of the Qinghai-Tibet plateau.Due to the lack of fossil evidence,the geological age of these red beds have been disputed for a long time.Dating these red beds can provide very important data for understanding the geological history of the Tibet plateau.Here we report pollen fossils from red beds overlying Triassic strata in the Qumalai basin of southern Qinghai.A poorly preserved but geologically significant pollen flora was discovered from a calcilutite at the middle part of the very thick red beds.This gray calcilutite is widely distributed in the mountain basins in northern Qinghai-Tibet plateau,often used as a marker bed by field geologists for stratigraphic correlation.The palynological assemblage is dominated by various Schizaeoisporites forms,with a small amount of Ephedripites and Classopollis.It is be assigned to a Late Cretaceous age.The predominance of Schizaeoisporites with few humid plant pollens and spores in the flora indicates that there an arid climate dominated southern Qinghai in the Late Cretaceous. |
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| Keywords: | spores and pollen Schizaeoisporites continental red beds biostratigraphy Cretaceous Qumalai Basin Qinghai |
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