摘要
中国东部陆缘中区第三纪主要发育5期构造火山事件高峰,分别发生在58～46Ma、38～36Ma、26～24Ma、20～16Ma、8～4Ma。形成的火山岩岩性相对单一,主要为玄武岩,大量隐伏于新生代含油气断陷盆地中,这与裂谷作用有关,而野外露头区只发育古新世、中新世和上新世火山岩。研究表明,火山作用伴随着盆地发育的全过程。成盆早期的火山岩代表着裂谷作用的开始。成盆中期火山活动相对强烈,不但形成大量火山岩,而且也是盆地生油岩发育的主要时期。盆地形成后期火山作用微弱。新生代火山作用的中心往往成为成盆中心和油气聚集区。
In the middle section of the eastern China continental margin, there are five tectonic-volcanic peaks in Tertiary, they are 58～46 Ma, 38～36 Ma, 26～24 Ma, 20～16 Ma and 8～4 Ma respectively. The lithology of volcanic rocks formed in these periods is fairly simple, mostly being basalt. Associated with rift action, most of volcanic rocks are buried under the Cenozoic oil-bearing fault basins and only Paleocene, Miocene and Pliocene volcanic rocks are exposed in the field. It has been showed that volcanism exists through the entire course of the basin's evolution. Volcanic rocks in the early period of basin formation marks the beginning of rift volcanism. Volcanism is relatively intense in the middle period of basin formation. Not only great deal of volcanic rocks, large amount of source rocks also were formed. In the late period of basin formation volcanism is weak. The centers of Cenozoic volcanism also are frequently the centers of basins in which much oil and gas were accumulated.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2003年第4期479-484,共6页
Journal of Jilin University：Earth Science Edition
基金
国家教育部博士点科学基金项目(200001870)
国家教育部留学回国人员科研启动基金资助
