渤海海域辽东湾坳陷正断层联接及其转换带特征
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本文为国家自然科学基金项目(编号40802030)和中海油重点科技攻关项目(编号SC06TJTQL004)的成果。


Linkages of Normal Faults and Transfer Zones in the Liaodongwan Depression, Offshore Bohai Bay Basin
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    摘要:

    渤海辽东湾坳陷发育的大量正断层通过硬联接和软联接的形式发生了相互作用,并形成了丰富的转换带。根据正断层的倾向及其组合特征,将正断层软联接类型分为同向、对向和背向叠覆型三类,其形成的转换带类型相应分为转换斜坡、斜向背斜和地垒。发育在正断层叠置段内的转换带传递了正断层之间的伸展应变量,使其在三维空间里保持应变守恒。辽东湾坳陷转换带的形成演化主要经历了孤立正断层、转换带形成、转换带复杂化和转换带破裂等四个阶段。

    Abstract:

    There are many intersecting normal faults by hard and soft linkages in the Liaodongwan depression, offshore Bohai Bay Basin. Consequently, various types of transfer zones had developed in the overstepping normal faults. According to the dips and assembling characteristics of normal faults, three types of soft linkages of normal faults have been classified in the Liaodongwan depression, including the synthetic overstepping, convergent conjugate overstepping and divergent conjugate overstepping. Their corresponding transfer zones are relay ramps, oblique anticlines and horsts, respectively. The zones transferred the extensional strains and made the threedimensional strain conversation between the segmented normal faults. The evolution of the transfer zones could be divided into four stages which involve the isolated faults, transfer zones formation, complication and broken. The structural traps in the transfer zones are the favourable exploration objectives in the offshore Bohai Bay Basin.

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余一欣,周心怀,汤良杰,魏刚,王应斌,吕丁友.2009.渤海海域辽东湾坳陷正断层联接及其转换带特征[J].地质论评,55(1):79-84,[DOI].
.2009. Linkages of Normal Faults and Transfer Zones in the Liaodongwan Depression, Offshore Bohai Bay Basin[J]. Geological Review,55(1):79-84.

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  • 收稿日期:2008-05-26
  • 最后修改日期:2008-09-16
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