摘要
利用最新的古生物、磁性地层年代资料及高分辨率层序延续时间推算,对鸡西群进行了精细的年代地层划分,确定了鸡西群形成时间为早白垩世凡兰吟早期—阿尔布中期,其中滴道组形成时间为130.9～128.3Ma,城子河组形成时间为125.1～116Ma,穆棱组形成时间为116～106.9Ma,东山组形成时间为106.9～101.7Ma。通过鸡西群二级层序湖平面升降曲线与全球海平面升降曲线对比,证实了鸡西盆地、勃利盆地的构造运动、古气候演变与全球海平面升降变化有着相同的大地构造背景。这一成果对吉林和黑龙江省东部早白垩世高精度地层划分对比及盆地构造作用与海陆变迁机制分析提供了精确的年代依据。
Using the latest paleontological, magnetostratigraphic and chronological data and the lasting time of the high-resolution sequences, the authors have made a detailed chronostratigraphic division of the Jixi Group and determined the Jixi Group formed in the Early Cretaceous early Valaginian to middle Albian. In the group, the Didao Formation formed at 130.9±128.3 Ma, the Chengzihe Formation at 125.1±116 Ma, the Muling Formation at 116±106.9 Ma, and the Dongshan Formation at 106.9±101.7 Ma. Through a correlation between the lake-level fluctuation curve of the second-order sequence in the Jixi Group with the curve of global eustasy, it is confirmed that the tectonic movement and paleoclimatic change of the Jixi and Boli basins had the same tectonic setting as the global eustasy. This result provides a precise chronological basis for the high-precision stratigraphic division and an analysis of basin tectonism and the mechanism for land and sea changes in Jilin and eastern Heilongjiang in the Early Cretaceous.
出处
《中国地质》
CAS
CSCD
2005年第1期48-54,共7页
Geology in China
基金
中国地质调查局地质大调查项目(200113000042)资助。
关键词
海平面升降
地质意义
地层时代
层序
盆地
形成时间
大地构造背景
黑龙江
东部
全球
Jixi group
chronostratigraphy
magnetostratigraphy
biostratigraphy
curve of global sea-level changes
Early Cretaceous
eastern Heilongjiang
