CAJ | 학술논문

冀西北早、中侏罗世地层尽管已有较长的研究历史,但在具体划分对比上与同处于燕山造山带的京西地区仍有所不同.前者划分为南大岭组、下花园组、九龙山组、髫髻山组和后城组,后者与下花园组相当的地层又分为窑坡组和龙门组.笔者通过研究认为,冀西北地区也发育有与京西相同层位的龙门组,只是以往将其或划归于下花园组,或分属到九龙山组;同时发现下花园组尚包含了部分南大岭组地层.重新划分后的地层层序为:侏罗系下统南大岭组,中统下花园组、龙门组、九龙山组、髫髻山组、后城组,完全可以与京西地区对比.本研究结论对于建立统一的燕山地区早、中侏罗世地层格架和地质构造演化过程的研究有重要意义.
기서북조、중주라세지층진관이유교장적연구역사,단재구체화분대비상여동처우연산조산대적경서지구잉유소불동.전자화분위남대령조、하화완조、구룡산조、초계산조화후성조,후자여하화완조상당적지층우분위요파조화룡문조.필자통과연구인위,기서북지구야발육유여경서상동층위적룡문조,지시이왕장기혹화귀우하화완조,혹분속도구룡산조;동시발현하화완조상포함료부분남대령조지층.중신화분후적지층층서위:주라계하통남대령조,중통하화완조、룡문조、구룡산조、초계산조、후성조,완전가이여경서지구대비.본연구결론대우건립통일적연산지구조、중주라세지층격가화지질구조연화과정적연구유중요의의.
The Early-Middle Jurassic strata in Northwestern Hebei even though has been researched for a long history, but t is still different with that in western Beijing (in the same region--Yanshan orogenic belt) as to the specific division and correlation. The strata in Northwestern Hebei area are divided into Nandaling Formation, Xiahuayuan Formation, Jiulongshan Formation,Tiaojishan Formation and Houcheng Formation while in the western Beijing area the strata that is considered the same layer to the Xiahuayuan Formation are divided into Yaopo Formation and Longmen Formation. Writers consider that,there is also the Longmen Formation in Northwestern Hebei area, the same layer to that in western Beijing, which are used to be considered as a part of the Xiahuayuan Formation or the Jiulongshan Formation. Writers also find that the Xiahuayuan Formation still contains a part of the Nandaling Formation. In this paper,the conclusions of a re-division are as follows: the Lower Jurassic Nandaling Formation, the Middle Jurassic Xiahuayuan Formation, Jiulongshan Formation,Tiaojishan Formation and Houcheng Formation, and they can be completely correlated with those in western Beijing area. These conclusions are very important to the establishment of the Early—Middle Jurassic stratigraphic framework and the study of the tectonic evolution in the Yanshan region.