摘要
东海新生代沉积厚度最大可达10km。分为三个发展时期。第一阶段从晚白垩世至中始新世,由于中国大陆向东濡散和掀斜断块作用,在大陆边缘由陆缘裂谷盆地转化为浅海沉积盆地。第二阶段从晚始新世至中中新世,由于喜马拉雅陆缘造山带的形成和中国大陆边缘的隆升联合作用结果,在大陆边缘由环绕大陆分布的带状地堑转化为前陆盆地。第三阶段从晚中新世至第四纪,由于太平洋板块向西俯冲,形成弧后断陷及弧前坳陷。从横向上看,不同性质和时代的沉积,由西向东,由老到新,依次排列。从盆地性质上看,由老到新,张性盆地和压性盆地交替形成,叠置在一起。因此不同时代和性质的盆地,具有不同的石油地质条件和油气成藏规律。
The maximum thickness of Cenozoic sediment resaches 10,000m, which can be divided into three developmental stages. The first stage is from Late Cretaceous to Middle Eocene, when the epicontinental rift basin in the continental margin changed into neritic sedimentary basin because the Chinese continent crept eastwards and also because of the tilted-block action. The second stage is from Late Eocene to Middle Miocene. During this time, the zonal gradens, distributed around the continent, were transformed into foreland basins, due to the formation of Himalayan orogenic zone and the rise of Chinese continental margin. The third stage is from Late Miocene to Quaternary, and the back-arc rifts and frontarc depressions were developed since the Pacific Plate subducted towards the west. Generally speaking, sediments with different ages and natures were getting younger towards the east. Ten-sional basins and compressive basins superposed each other alternately with ages from old to young, therefore basins different in ages and natures, have different petroleum geological conditions and oil (gas) accumulation patterns.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
1992年第2期1-11,共11页
Marine Geology & Quaternary Geology
关键词
东海
新生代
沉积盆地
成盆期
East China Sea Cenozoic sedimentary basin Basining period
