CAJ | 학술논문

根据新的测年资料，原燕山地区青白口系下部的下马岭组被厘定为中元古界延展系（1400～1200Ma）地层。对上部现在尚未获得精确年龄的长龙山组和景儿峪组，本文通过它们与下伏地层界线性质的研究，以及它们与辽南和华南等新元古代典型沉积盆地不同发展阶段沉积特征的比较，认为它们并不是象过去K-Ar年龄所指示的那样属于青白口纪（或拉伸纪）的晚期地层，而可能是在全球罗地尼亚超大陆开始进一步裂解背景下形成的南华纪（或成冰纪）早期沉积，年龄可能在780Ma和660Ma之间。因此，燕山地区的原“青白口系”可能都不是真正青白口纪（1000～800Ma）的地层，燕山地区的原“青白口系”可能要被全部解体。
근거신적측년자료，원연산지구청백구계하부적하마령조피전정위중원고계연전계（1400～1200Ma）지층。대상부현재상미획득정학년령적장룡산조화경인욕조，본문통과타문여하복지층계선성질적연구，이급타문여료남화화남등신원고대전형침적분지불동발전계단침적특정적비교，인위타문병불시상과거K-Ar년령소지시적나양속우청백구기（혹랍신기）적만기지층，이가능시재전구라지니아초대륙개시진일보렬해배경하형성적남화기（혹성빙기）조기침적，년령가능재780Ma화660Ma지간。인차，연산지구적원“청백구계”가능도불시진정청백구기（1000～800Ma）적지층，연산지구적원“청백구계”가능요피전부해체。
On the basis of the new datings, the Xiamaling Formation of the lower Qingbaokou System in Yanshan range has been identified as the deposits of the early Ectasian System(1 400 - 1 200 Ma), the middle Mesoprotero-zoic. As for the Changlongshan and Jingeryu Formations of the upper Qingbaikou that they are without more pre-cise dating up to now, through the research for the nature of the boundary between them and underlying strata, and the comparison with depositional characteristics of different stages of tectonic development in a number of representative Neoproterozoic basin in Liangdong Peninsula and south China, this paper tend that they are not the upper Qingbaikou (Tonian) as shown by previous K-Ar ages and are the deposits in the early Nanhua period (or early Cryogenian) under the background of that the Rodinia Supercontinent was further broken-up.Their age is be-tween 780 Ma and 660 Ma possibly. That is to say, the standard Qingbaikouan System in yanshan range is not the strata of the Qingbakouan Period and all the Qingbaikouan System in yanshan range will be disintegrated possi-bly.