摘要
前人对松辽盆地营城组的时代存在不同认识。利用松辽盆地北部徐家围子断陷区营城组广泛发育的中—酸性火山岩取芯资料,开展了详细的火山岩锆石SHRIMP U-Pb年代学研究,结果表明营城组火山岩年龄集中在113—111Ma之间,属于早白垩世晚期的Aptian与Albian界线附近,从而明确该套火山岩应发育在营城组中上部的新认识,并由此说明营城组的顶界已跨入Albian。因此,认为松辽盆地营城组的时代为Hauterivian到Albian。
The age of the Yingcheng Formation in the Songliao Basin has been disputed. A suite of volcanic intermediate rocks to acidites, mainly acidic eruptive rocks, occurs widely in the Yingcheng Formation in the Xujiaweizi fault-depression in the northern Songliao Basin. SHRIMP zircon U-Pb geochronology gives ages between 111Ma and 113Ma for the volcanic rocks indicating that the volcanic succession formed around Aptian-Albian of the Early Cretaceous. Accordingly it is concluded that this suite of volcanic rocks was emplaced at the middle-upper part of the Yingcheng Formation. Based on available information, the age of the Yingcheng Formation in the northern Songliao Basin is most likely between Hauterivian and Albian.
出处
《地层学杂志》
CSCD
北大核心
2008年第1期15-20,共6页
Journal of Stratigraphy
基金
大庆油田勘探开发研究院天然气开发项目
关键词
火山岩
锆石SHRIMP
U-PB年代学
营城组
白垩系
松辽盆地
黑龙江
volcanic rocks, SHRIMP zircon U-Pb geochronology, Yingcheng Formation, Cretaceous, Songliao Basin, Heilongjiang Province