陕西渭北东部寒武纪-奥陶纪岩相古地理与岩溶水赋存关系

Relations between Cambrian-Ordovician lithofacies-paleogeography and occurrence of karst groundwater in eastern Weibei, Shaanxi Province

摘要: 在系统研究大量野外实测剖面和钻孔资料的基础上,认为本区寒武纪—奥陶纪岩相古地理演化可分为3个海侵海退旋回,构成了一套独特的、完整的沉积序列。沉积层的岩溶发育程度与沉积环境密切相关,从开阔海、潮下、高能、滩环境沉积层,到开阔海、低能、间歇高能环境沉积层,再到滨海、潮上、泥云坪和泥灰坪环境沉积层,岩溶发育程度逐渐降低,富水程度逐渐减弱。

Abstract: Based on systematic study of many measured stratigraphic sections and borehole data, the evolution of Cambrian-Ordovician lithofacies-paleogeography in the eastern Weibei area, Shaanxi, can be divided into three cycles of marine transgression and regressi