摘要
针对当前不少学者认为柴达木侏罗纪盆地存在“前陆盆地”的观点,文章根据前人对前陆盆地的定义与识别标志,主要从柴达木侏罗纪盆地形成的大地构造背景、动力学机制、沉积特征、沉积相空间展布等方面,对其是否属“前陆盆地”进行了分析与讨论,认为:①柴达木侏罗纪盆地不具备典型“前陆”的特征,几乎不存在前陆盆地的可能性;②柴达木盆地在早中侏罗纪与晚侏罗纪有不同的成盆动力学机制与成盆构造背景:前者是弱松弛伸展环境,后者形成在弱挤压构造环境。结论:柴达木侏罗纪盆地不是前陆盆地。
At present many scholars believe that Jurassic Chaidamu basin is a foreland basin. Based on the previous definition and identification marks of foreland basin, this paper discusses whether Jurassic Chaidamu basin is a foreland basin from many respects including its tectonic setting, kinetic mechanism, sedimentary characteristics and spatial distribution of sedimentary facies. It is thought that Jurassic Chaidamu basin has no typical characteristics of foreland basins and there is almost no possibility of forming a foreland basin. It is believed that Chaidamu basin has different kinetic mechanisms and tectonic settings in Early-Middle Jurassic and Late Jurassic, with the former being a weak relaxed extensional tectonic setting, while the latter being a weak compressional tectonic setting. In the end it is concluded that Chaidamu Jurassic basin is not a foreland basin.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2006年第2期43-45,共3页
Natural Gas Industry
