河南平顶山地区第四纪地层序列划分  

Sequence of Quaternary Deposits in Pingdingshan , Henan Province

作　　者：杨长秀[1] 刘振宏[1] 武太安[1] 崔霄峰[1] 李春艳[1] 杨长青[1] 

机构地区：[1]河南省地质调查院

出　　处：《地质调查与研究》2004年第1期52-57,共6页Geological Survey and Research

基　　金：中国地质调查局国土资源大调查项目(200113000013)

摘　　要：根据岩石地层学、地貌学、孢粉学特征,将河南平顶山地区的第四系划分为4个岩石地层单位,由老到新分别为鲁山组、下汤组、社旗组和马塘组。鲁山组分布于前隆起岗地,为冲洪积成因,形成于225×104aB.P.。下汤组具二元结构,组成河流Ⅳ级阶地,属河流冲积成因,形成于64×104aB.P.。社旗组具二元结构特征,组成河流Ⅲ级阶地,属河流冲积成因,形成年代大于5.42×104aB.P.。马塘组也具二元结构特征,组成河流Ⅱ级阶地,属河流冲积成因,形成于2×104aB.P.。岩石地层单位的划分为探讨黄河—淮河冲积平原及南阳盆地的形成与演化提供了基础性资料。Accoding to the characters of petrostratigraphy, physiognomy and palynology, the Quaternary deposit can be divided into 4 lithostratigraphic units in Pingdingshan area, Henan Province. From The old to the new they are named Lushan, Xiatang, Sheqi and Matang Formatiom. Lushan Formation is loucated in the foreheaving area, formed by alluvial-pluvial evens. It's age is about 225×104 a B.P.. Xiatang, Sheqi and Matang Formation, all with binary structure, are the Ⅳ, Ⅲ, Ⅱterraces respectively , and they are all alluvial deposit. Their ages are respectively about 64×10~4 a B.P., 64×10~4 a B.P., and 2×10~4 a B.P.

关 键 词：河南平顶山 第四系 岩石地层 地貌 

分 类 号：P534.63[天文地球—第四纪地质学]