地层学杂志

前人对华北平原太行山前第四纪地层进行过广泛的研究,但由于研究侧重点不同以及受当时技术手段的限制,目前仍缺乏基于年代学与环境测试资料的详细系统研究,这不但影响了区域第四纪地层的详细划分和对比,而且在某种程度上严重制约了华北平原地下水系统的精确划分、水资源准确评价、地下水调蓄以及地下水回灌等研究工作。为此,我们在太行山前地区、滹沱河冲洪积扇的顶部实施了一个第四纪科研钻孔(ZD08-1),孔深400m,涵盖了上新世晚期以来的地层。钻孔进行了全孔取芯,基于岩性特征、沉积旋回、古地磁、光释光以及孢粉测试数据,结合区域第四纪地层资料,对钻孔第四纪地层界线做出了详细划分,并建立了本区晚新生代以来的地层年代序列,为区域第四纪地层划分与对比、古气候环境重建以及区域地下水的深入研究奠定了翔实基础。

Previous studies on Quaternary stratigraphy in the piedmont of North China Plain were lacked a detailed stratigraphic framework because of the scarcity of geochronological and paleoenvironmental data.This deficiency limits the reliability of the subdivision and regional correlation of Quaternary strata,and also affects the regional groundwater researche of the North China Plain,such as groundwater resources evaluation,groundwater regulation and storage,and groundwater recharge.To improve the Quaternary stratigraphy of the North China Plain,a research drill core(ZD08-1,400min depth)was made in the piedmont of the Taihang Mountains,at the top of the Hutuohe alluvial fan deposits,which cover all strata since the late Pliocene.With full core recovery,807paleomagnetic samples,17OSL samples,and 380pollen samples,the drill core was studied carefully.Based on lithostratigraphic and sedimentary cycle analyses,in combination with regional stratigraphic data,Quaternary stratigraphic boundaries were identified and borehole stratigraphic sequence was established.The study provides a reference for regional stratigraphic subdivision and correlation of Quaternary strata in the North China Plain.