鲁西隆起和济阳坳陷新生代隆坳耦合关系

Cenozoic Uplifting/Subsidence Coupling Between the West Shandong Rise and the Jiyang Depression, Northern China

为探讨鲁西隆起的抬升史,研究鲁西隆起和济阳坳陷之间的隆-坳演化关系,进一步揭示渤海湾盆地的演化特征,主要利用裂变径迹分析和裂变径迹t-T模拟方法建立了新生代鲁西隆起的抬升史和济阳坳陷的沉降史。鲁西隆起三期抬升史分别为62～53Ma、44～37Ma和23～20Ma,济阳坳陷在65～46Ma和46～38Ma期间为快速构造沉降期,构造沉降量大,23Ma左右坳陷抬升。对比研究表明,新生代鲁西隆起的抬升与济阳坳陷沉降之间存在隆-坳耦合关系。鲁西隆起的抬升控制了济阳坳陷烃源岩的形成、油气运移时间和油气分布由南向北迁移,并为济阳坳陷古潜山油藏提供了有效的储集空间。研究还认为,鲁西隆起与济阳坳陷的隆坳耦合关系是渤海湾盆地及周边山系盆山耦合事件的一个组成部分。

This paper mainly studies the Cenozoic uplifting history of the West Shandong Rise and the subsidence of the Jiyang Depression in order to understand the uplifting history of the West Shandong Rise （WSR）, the relationship between the WSR and the Jiyang Depression, further better our insights into the Bohai Bay Basin. Our AFT analysis and AFT t-T model indicates that there were three relatively rapid stages for uplifting of the West Shandong Rise： 62～53 Ma, 44～37 Ma and 23～20 Ma. Meanwhile, two rapid subsidence with big a big magnitude of subsidence at 65～46 Ma and 46～38 Ma, and one uplifting at 23 Ma also took place in the Jiyang Depression. Comparison study shows that the uplifting of the West Shandong Rise at Cenozoic coupled well with the subsidence of the Jiyang Depression. Furthermore, the uplifting events not only control the formation of hydrocarbon＇s mother rock, and the time, distribution and migration of oil-gas, but also provide a reservoir space for the oil-gas in the buried hills. Our research also suggests that the uplift-depression coupling events are part of the couplings between the Bohai Bay Basin and its peripheral mountains.