| 河北省北部张北县一带全新世中期砂层的成因 |
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| 引用本文： | 王行军,蔺晓峰,王德强,专少鹏,班长勇,刘玉君.河北省北部张北县一带全新世中期砂层的成因[J].吉林大学学报(地球科学版),2007(Z1). |
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| 作者姓名： | 王行军 蔺晓峰 王德强 专少鹏 班长勇 刘玉君 |
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| 作者单位： | 河北省地质调查院 河北工业大学廊坊分校 河北省地质调查院 河北廊坊 河北廊坊 |
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| 基金项目： | 国土资源部区域地质调查项目(冀勘地1998[70]) |
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| 摘 要： | 在冀北张北县发育一套特殊的砂层,因其内部赋存有数量众多的细石器而备受地质工作者的关注,但对其成因却有不同认识。从地层学、年代学、古生物学、砂粒表面及组合特征、砂体分布及产状等方面,对砂层进行了研究与分析。砂层分布于二级阶地或向阳低矮平缓山坡之上,临近水源,呈近东西向展布;堆积物呈灰褐色,分选性差、磨圆度差,不显层理,且其中含有细石器、陶器碎片、灰烬层等古人类文化遗存;粒度分析结果及扫描电镜研究表明,砂层形成于水动力条件中等的河流环境,后期又经过了改造;砂层之中富含丰富的哺乳动物化石及生成于温湿气候条件下的孢子花粉;测年资料证实砂层形成于全新世中期—全新世大暖期。诸多证据表明全新世中期砂层原始环境为河流环境,后期为古人类所利用,应为古人类活动而留下的遗存,属于人工堆积,为古村落遗址。
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| 关 键 词： | 冀北 全新世中期 砂层 成因 人工堆积 |
The Originatio Study of Mid-Holocene Sand Bed in Zhangbei,Northern Hebei Province |
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| WANG Xing-jun,LIN Xiao-feng,WANG De-qiang,ZHUAN Shao-peng,BAN Chang-yong,LIU Yu-jun .Hebei Institute of Geology Survery,Langfang,Hebei ,China .Hebei University of Technology,Langfang,Hebei ,China.The Originatio Study of Mid-Holocene Sand Bed in Zhangbei,Northern Hebei Province[J].Journal of Jilin Unviersity:Earth Science Edition,2007(Z1). |
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| Authors: | WANG Xing-jun LIN Xiao-feng WANG De-qiang ZHUAN Shao-peng BAN Chang-yong LIU Yu-jun Hebei Institute of Geology Survery Langfang Hebei China Hebei University of Technology Langfang Hebei China |
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| Institution: | WANG Xing-jun1,LIN Xiao-feng2,WANG De-qiang1,ZHUAN Shao-peng1,BAN Chang-yong1,LIU Yu-jun1 1.Hebei Institute of Geology Survery,Langfang,Hebei 065000,China 2.Hebei University of Technology,Langfang,Hebei 065000,China |
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| Abstract: | There is a special sand bed in Zhangbei county,northern Hebei province.It's attented by many geology workers,because there are many microlithic tools in it.But there are different cognition on its genesis.The paper studied the character of the special sand bed form stratigraphy and chronology and paleontology and sand surface structure and sand combination and sand bed shade and attitude of rocks.Deposit lay on the second terrace and facing the sun and low and short and flat mountain slope,and draws near waterhead,disperses by east-west direction.Deposit is a suit of gray brown fine sand.It does not show bedding,and there are many remains of ancient man,such as microlithic tools,crockery pieces,ash bed.It is bad that the sorting and roundness.The result of grain size distribution and Scanning electron microscope analysising shows that the Mid-Holocence sand bed's sand primitive formatting environment is the water environment of medium river,moreover has been reformed in evening again.The sands contains rich mammal fossil and rich sporopollen which is fond of wet and warm environment.The measuring year result expresses that sand bed formed in Mid-Holocence,which is the climate optimum time of Holocence.A lot of evidences show that Mid-Holocence sand bed in northern Hebei province formed in the river environment,moreover has been reformed by ancient man in evening again,is remains of ancient man activity,belong to manual deposit,is site of ancient villages. |
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| Keywords: | northern Hebei Province Mid-Holocene sand bed genesis manual deposit |
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