廊固凹陷冶炼厂孔孢粉组合及其地层意义

SPOROPOLLEN ASSEMBLAGES FROM THE YELIANCHANG BOREHOLE IN THE LANGFANG-GU'AN SAG AND THEIR STRATIGRAPHICAL SIGNIFICANCE

  • 摘要: 冶炼厂LFK1孔位于河西务断裂上盘,孔深249m,自下而上依次为更新统中部杨柳青组、更新统上部欧庄组及全新统等。对LFK1的孢粉资料进行详细分析,自下而上划分出六个孢粉组合带,反映廊固凹陷地区植被演替及相应的气候演变,并结合测年和钻井资料,确定孢粉带I为中更新世,孢粉带II、III、IV和V为上更新世,孢粉带VI为全新世。

     

    Abstract: Yelianchang LFK1 borehole is located in the hanging wall of Hexiwu fault, the depth of it is 249 m and were composed of Middle Pleistocene Yangliuqing Formation, Early Pleistocene Ouzhuang Formation and Holocene deposits.Detailed sporopollen analysis on the Quaternary deposits from LFK1 borehole was conducted and 6 sporopollen-zones were identified.The results show that the vegetation succession and the corresponding climatic variation.According to the features of sporopollen assemblages and combined with dating and drilling data, we determine that Sporopollen-zone I is Middle Pleistocene, Sporopollen-zones II, III, IV and V are Early Pleistocene, Sporopollen-zone VI is Holocene deposits.

     

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