中朝板块新元古代微亮晶(臼齿构造)碳酸盐事件、层序地层和建系研究

STUDY OF THE NEOPROTEROZOIC MICROSPAR (MOLAR TOOTH) CARBONATE EVENTS, SEQUENCE STRATIGRAPHY OF THE SINO-KOREAN PLATE AND THE ESTABLISHMENT OF THE BEIHUAN SYSTEM

通过对中朝板块燕山、吉辽和徐淮地区新元古代地层的沉积学、旋回地层学、锶同位素地层学以及(臼齿构造)碳酸盐岩事件和海平面变化研究,特别是IGCP447项目的全球性综合调查和对比研究,提出了增建北华系的地层划分和对比方案:以南华系底界(730±10Ma)也就是全球性成冰系的底界为北华系的顶界,而北华系底界应该对应于青白口系顶界(850Ma),即以钓鱼台组底界作为青白口系与北华系的界线。辽宁大连金石滩剖面可以作为北华系界线层型剖面的候选剖面。

The Neoproterozoic strata are widely distributed in the Yanshan, Jilin-Liaoning, and XuzhouHuainan areas of the Sino-Korean Plate. Based on the sedimentology, sedimentary cyclicity, sedimentary events, and especially molar-tooth events and sea-level changes of the measured sections, a new division and correlation plan is suggested. The strata between the Nanhuan and Qingbaikou systems are suggested to be named a new system the Beihuan System. The base of the Diaoyutai Formation is proposed to mark the boundary between the Qingbaikou and Beihuan systems.