燕山西段及太行山区长城系底界的讨论  

THE BASAL BOUNDARY OF THE CHANGCHENG SYSTEM IN THE WESTERN YANSHAN AND TAIHANGSHAN

作　　者：林晓辉[1] 吴昌华[1] 

机构地区：[1]天津地质矿产研究所,天津300170

出　　处：《地层学杂志》2002年第1期46-49,共4页Journal of Stratigraphy

基　　金：国家自然科学基金项目 ( No.49972 0 6 5 )资助

摘　　要：对燕山型长城系底部层位存在有不同的认识 ,从含钾盆地、大红峪海侵超覆、团山子组海进或海退的问题提出长城系底部地层属于大红峪组的观点。大红峪期时 ,燕山地区只存在一个含钾盆地 ,造成多层含钾页岩沉积 ,而串岭沟组不含钾。以前所划各组段的海侵超覆实为大红峪组的海侵超覆 ,是兴城运动在燕山西段的反映 ,其底部有明显的相变特征。由此把燕山西段及太行山区长城系底部层位重新划为大红峪组 ,则团山子组存在的不协调现象也就迎刃而解。同时还认为昌平德胜口剖面与青龙大杖子剖面几可逐层对比 ,阳原牛坊沟剖面与代表“青龙上升”的剖面相似 。There have been different views about the Changcheng System in the western Yanshan and Taihangshan region. The authors of this paper consider that the basal part of the Changcheng System should be absigned to the Dahongyu Formation and think that there was a potassium-bearing basin during the Dahongyu period, and that potassium-bearing shales were deposited during the Dahongyu period too. A transgressive overlap took place also in that period, but no transgressive overlap was known from the Changzhoukou to Tuanshanzi period. There was Xingcheng movement in the western Yanshan and Taihangshan region.

关 键 词：长城系 含钾页岩 牛坊沟剖面 郭万井剖面 河北 燕山 太行山 海进特征 中新元古代 

分 类 号：P534.3[天文地球—古生物学与地层学]