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

作　　者：刘志辉[1,2] 陈建强[3] 

机构地区：[1]河北省地震局,石家庄050022 [2]吉林大学地球探测与科学技术学院,长春130026 [3]中国地质大学(北京),北京100083

出　　处：《华北地震科学》2013年第2期13-17,共5页North China Earthquake Sciences

基　　金：廊坊市城市活断层探测及地震危险性评价项目(冀发改投资[1443]号)

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。Yelianchang LFK1borehole 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 LFK1borehole was conducted and 6sporopollen-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.

关 键 词：廊固凹陷 孢粉 第四纪 

分 类 号：P319[天文地球—固体地球物理学]