太行山南缘王莽岭地区风化壳的地球化学特征与夷平面形成环境  

Characteristics of Weathering Crust and Formation of Planation Surface in Wangmangling at the Southern Edge of Taihang Mountain

作　　者：张蕾[1] 张绪教[2] 武法东[2] 邓会娟[1] 陈康 ZHANG Lei;ZHANG Xu-jiao;WU Fa-dong;DENG Hui-juan;CHEN Kang(Cores and Samples Center of Land and Resources,China Geological Servey,Sanhe,Hebei 065201;School of Earth sciences and Resources,China University of Geosciences(Beijing),Beijing 100083)

机构地区：[1]国土资源实物地质资料中心,河北三河065201 [2]中国地质大学(北京)地球科学与资源学院,北京100083

出　　处：《地球学报》2018年第5期635-642,共8页Acta Geoscientica Sinica

基　　金：中国地质调查局科研项目"实物地质资料信息产品开发与服务"(编号:121201013000150002-06)资助~~

摘　　要：通过野外考察、室内测试分析及区域对比,对王莽岭地区风化壳的特征与夷平面的形成环境进行探讨。从地貌学、古岩溶、风化壳等方面验证了王莽岭地区存在一级夷平面(1 400~1600 m)和一级古宽谷—山麓面(800~1100m)。通过对风化壳的地球化学测试分析,认为夷平面形成于湿热的气候环境,其上风化壳脱硅富铝化作用明显,但仍属于中等发育程度;古宽谷—山麓面形成于暖湿的气候环境,其上风化壳脱硅富铝化作用不强,发育程度为中等偏弱。最后,通过区域综合对比,初步推断夷平面是形成于渐新世的太行期夷平面,古宽谷—山麓面是形成于上新世的唐县期古宽谷—山麓面。Through field investigation,indoor test analysis and regional comparison,the characteristics of the weathering crust in the Wangmangling area and the formation environment of the plane of the surface are discussed.From the aspects of geomorphology,palaeokarst,and weathering crust,it is verified that there are planation surface(1 400~1 600 m)and paleo-valley-mountain surface(800~1 100 m)in Wangmangling.Through the geochemical test of the weathering crust,it is believed that the planation surface was formed in a hot and humid climatic environment,and the aluminiferization effect of the weathering crust on the weathering crust was obvious,but it was still moderately developed;paleo-valley-mountain surface was formed in a warm and humid climatic environment,and its weathering crust was not strong enough for desilication,and its development was moderately weak.Finally,through regional comprehensive comparisons,it is concluded that the planation surface is Taihang planation surface which was formed in Oligocene,and the paleo-valley-mountain surface is Tangxian planation surface which was formed in Pliocene.

关 键 词：太行山 王莽岭 夷平面 风化壳 

分 类 号：P594.2[天文地球—地球化学] P931[天文地球—地质学]