赵海滨, 尹志刚, 汪岩, 牛延宏, 于荣文, 马丽玲, 李尚林, 赵军. 2006: 黑龙江北部嘉荫盆地中南部原划新近系时代的重新厘定. 地质通报, 25(4): 460-464.
    引用本文: 赵海滨, 尹志刚, 汪岩, 牛延宏, 于荣文, 马丽玲, 李尚林, 赵军. 2006: 黑龙江北部嘉荫盆地中南部原划新近系时代的重新厘定. 地质通报, 25(4): 460-464.
    ZHAO Hai-bin, YIN Zhi-gang, WANG Yan, NIU Yan-hong, YU Rong-wen, MA Li-ling, LI Shang-lin, ZHAO Jun. 2006: Redefinition of the original Neogene strata in the south-central Jiayin basin, northern Heilongjiang, China. Geological Bulletin of China, 25(4): 460-464.
    Citation: ZHAO Hai-bin, YIN Zhi-gang, WANG Yan, NIU Yan-hong, YU Rong-wen, MA Li-ling, LI Shang-lin, ZHAO Jun. 2006: Redefinition of the original Neogene strata in the south-central Jiayin basin, northern Heilongjiang, China. Geological Bulletin of China, 25(4): 460-464.

    黑龙江北部嘉荫盆地中南部原划新近系时代的重新厘定

    Redefinition of the original Neogene strata in the south-central Jiayin basin, northern Heilongjiang, China

    • 摘要: 黑龙江省北部嘉荫盆地北端的黑龙江南岸渔亮子组是中国最早发现爬行类动物化石的层位,盛产恐龙化石。长期以来,盆地中南部的地层被划为古近系孙吴组。对乌拉嘎镇、庆林林场的孢粉研究显示,该地层的时代属晚白垩世晚期,相当于马斯科里赫特早期,可与黑龙江南岸嘉荫地区的渔亮子组对比。孢粉组合中含有大量耐干旱盐碱的克拉梭粉(Classopollis)、麻黄粉(Ephedripites),但未见前人在该地层中发现和报道的反映温暖潮湿气候环境的鹰粉(Aquilapollenites)和槐叶萍科(Ariadmesporites)异孢。反映当时有一暂短的从温暖潮湿-干旱炎热的气候大变迁,这种变迁可能是造成恐龙大量死亡的原因之一。

       

      Abstract: The Yuliangzi Formation on the southern bank of the Heilongjiang RAver at the northern end of the Jiayin basin, Heilongjiang Province, is the horizon where reptile fossils were found in China earliest and there occur abundant dinosaur fossils. The strata in the south-central basin has long been assigned to the Neogene Sunwu Formation. Study of sporopollen in Wulaga Township and the Qinglin forest farm shows that the strata are late Late Cretaceous in age, corresponding to the early Maastrichtian, which may be correlated with the Yuliangzi Formation in the Jiayin area on the southern bank of the Heilongjiang RAver. In the sporopollen assemblage there are abundant drought-, salt- and alkali-enduring Classopollis and Ephedripites, but no once reported Aquilapollenites or Ariadnaesporites which reflects the warm-wet climatic environment has been found. This reveals that there occurred a great transient climatic change from the warm-humid one to dry-hot one then. This climatic change might be one of the causes for mass extinction of dinosaurs.

       

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