吉林大学学报(地球科学版) ›› 2019, Vol. 49 ›› Issue (1): 106-114.doi: 10.13278/j.cnki.jjuese.20180117
• 大陆架科学钻探 • 上一篇
祁江豪1,2, 吴志强1,2, 张训华2,3, 侯方辉1,2
Qi Jianghao1,2, Wu Zhiqiang1,2, Zhang Xunhua2,3, Hou Fanghui1,2
摘要: 为了识别胶莱盆地海阳凹陷在南黄海地区的东部延伸边界,利用穿越南黄海的OBS2013-SYS深地震测线开展2D速度结构模拟,在测线NW方向位于千里岩隆起带的OBS(海底地震仪)站位均观察到了折合走时突然增加的现象。速度结构模型显示胶莱盆地东侧海阳凹陷附近海域存在明显的低速沉积层增厚现象,模型自OBS06站位向NW方向,沉积层厚度由小于1.0 km显著增厚至2.5 km左右,推测该处为胶莱盆地海阳凹陷的东部边界断裂。结合前人在海阳凹陷识别出的控盆断裂进行分析,厘定了海阳凹陷在海区大体的构造边界和沉积中心,认为胶莱盆地东部控盆断裂可能延伸至连云港-石岛断裂一线,与嘉山-响水-千里岩断裂构成千里岩隆起带南北边界断裂带的一部分。海阳凹陷沉降中心可能位于南黄海海区连云港-石岛断裂北侧海阳凹陷的NE方向,发育的厚层白垩系可能存在较好的油气前景。
中图分类号:
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