摘要
琼东南盆地的发展经历了由断陷到坳陷的演化过程，盆内充填了巨厚的沉积地层，该套地层在上、下第三系内可识别出14个层序，断陷期6个坳陷期8个。断陷期层序发育主要受控于幕式构造运动，层序由冲积扇、河流、湖泊、扇三角洲和碎屑滨岸体系沉积的粗碎屑岩组成。坳陷期层序发育主要受控于全球海平面变化并具有典型被动大陆边缘特征，低位域由企底扇、斜坡扇和海底水道沉积组成；海进体系域和高位体系域由三角洲、碎屑滨岸、碳酸盐台礁和浅海陆架体系沉积组成．
The Qiongdongnan basin involved from a fault basin into a downwarped basin .and is filled with very thick sediments. of this suite sediments, 14 sequences can be recognized in the Lower-upper Tertiary .with 6 sequences being formed in faulting stage and 8 being formed in down warping. In faulting stage .the de velopment of sequence was mainly controlled by episodic tectonic movement, and the sequence consists of coarse clastic sediments deposited in alluvial fan, river, lake, fan-delta and clastic littoral environments. In the down-warping stage,the formation of sequence was mainly controlled by global change of sea level .and the sequence is characteristic of typical passive continental margin and includes lower systern tracts. Pro gressive system tracts and high system tracts. The lower system tracts conslsts of basln botton fan. slope fan and submarine channel sediments,and progressive and high system tracts consist of delta system,clastic littoral system,carbonate platform reef system and neurotic shelf systems.
出处
《石油实验地质》
CAS
CSCD
北大核心
1998年第2期124-128,共5页
Petroleum Geology & Experiment
基金
中国海洋石油总公司"九五"重点科技攻关项目!"海上油气勘探目标模拟评价系统研制"
