珠江口盆地白云凹陷断裂构造特征及其活动期次
|
摘要
对白云凹陷地震资料的解释分析表明,该凹陷断裂构造以正断层和走滑断裂为主,未见逆断层。在平面上,断裂主要为NWW至近EW走向,不同等级与不同走向断层表现为平行断层系、帚状断层系和雁列断层系等三种断层组合形式。剖面中,单条断层样式相对简单,主要呈现平面式、铲式和座椅式等构造样式;多条断层主要表现为花状组合、马尾状组合、Y字型组合和阶梯状组合等构造特征。通过对断裂活动强度统计发现,不同区域断裂的发育时间和发育强度亦有差异,其中50—30MaBP是断裂的强烈发育期,控制凹陷的同张裂期沉积充填;13.8—10MaBP受东沙运动的影响断裂再次活化,属于中等强度发育期。
Baiyun Sag(BYS) lies in the deep water area of the Zhujiang River Mouth Basin(PRMB).It is the largest,deepest and most potential sag in the north margin of the South China Sea.The faults in the BYS are mainly in normal type and may be divided into three groups by orientation,i.e.NWW,E-W and NE,with NWW predominant.On plane view these faults form parallel,fastigiated,and en echelon combinations.In vertical sections these faults form flower,horsetail,or ladder shaped combinations,while a single fault may be of planar,listric,or chair shape.The fault movement velocity varies in difference districts.Statistics indicates that the strongest fault activity occurred during the period of 50—30MaBP and controlled the sag formation and the syn-rifting sedimentation.The faulting rejuvenated in the Dongsha movement(13.8—10MaBP) with secondarily strong activity.
Baiyun Sag(BYS) lies in the deep water area of the Zhujiang River Mouth Basin(PRMB).It is the largest,deepest and most potential sag in the north margin of the South China Sea.The faults in the BYS are mainly in normal type and may be divided into three groups by orientation,i.e.NWW,E-W and NE,with NWW predominant.On plane view these faults form parallel,fastigiated,and en echelon combinations.In vertical sections these faults form flower,horsetail,or ladder shaped combinations,while a single fault may be of planar,listric,or chair shape.The fault movement velocity varies in difference districts.Statistics indicates that the strongest fault activity occurred during the period of 50—30MaBP and controlled the sag formation and the syn-rifting sedimentation.The faulting rejuvenated in the Dongsha movement(13.8—10MaBP) with secondarily strong activity.
引文
[1]庞雄,陈长民,彭大钧,等.南海珠江深水扇系统及油气[M].北京:科学出版社,2007:248—253.
[2]朱伟林,黎明碧,吴培康.珠江口盆地珠三坳陷石油体系[J].石油勘探与开发,1997,24(6):21—23.
[3]黄正吉.珠江口盆地陆相烃原岩与油气生成[J].中国海上油气(地质),1998,12(4):255—261.
[4]PANG Xiong,YANG Shaokun,ZHU Ming,et al.Deep-water fan systems and petroleum resources on the northernslope of the South China Sea[J].Acta Geologica Sinica,2004,78(3):626—631.
[5]邱燕,王英民,温宁,等.珠江口盆地白云凹陷陆坡区有利成藏组合带[J].海洋地质与第四纪地质,2005,25(1):93—98.
[6]彭大钧,陈长民,庞雄,等.南海珠江口盆地深水扇系统的发现[J].石油学报,2004,25(5):17—23.
[7]彭大钧,庞雄,陈长民,等.南海珠江深水扇系统的形成特征与控制因素[J].沉积学报,2006,24(1):10—18.
[8]KNIPE R J.Juxtaposition and seal diagrams to help analyzefault seals in hydrocarbon reservoirs[J].AAPG Bulletin,1997,81(2):187—195.
[9]WALSH J J,WATTERSON J,HEATH A E.Representa-tion and scaling of faults in fluid flow models[J].PetroleumGeoscience,1998,4:241—252.
[10]RICHARD H S.Fluid involvement in normal faulting[J].Journal of Geodynamics,2000,29:469—499.
[11]SMITH D A.Theoretical consideration of sealing and nose-aling faults[J].AAPG Bulletin,1966,15(1):14—27.
[12]ALLAN U S.Model for hydrocarbon migration and entrap-ment within faulted structures[J].AAPG Bulletin,1989,73(7):803—811.
[13]YIELDING G,FREEMAN B,NEEDHAM D T.Quantita-tive fault seal prediction[J].AAPG Bulletin,1997,81(6):897—917.
[14]陈汉宗,吴湘杰,周蒂,等.珠江口盆地新生代主要断裂特征和动力背景分析[J].热带海洋学报,2005,24(2):52—61.
[15]周蒂,王万银,庞雄,等.地球物理资料所揭示的南海东北部中生代俯冲增生带[J].中国科学D辑,2006,36(3):209—218.
[16]孙珍,庞雄,钟志洪,等.珠江口盆地白云凹陷新生代构造演化动力学[J].地学前缘,2005,12(4):489—498.
[17]孙龙涛,陈长民,詹文欢,等.应用分形几何预测珠江口盆地白云凹陷有利成藏区[J].中国海上油气,2006,18(4):241—246.
[18]黄春菊,周蒂,陈长民,等.深反射地震剖面所揭示的白云凹陷的深部地壳结构[J].科学通报,2005,50(10):1024—1031.
[19]吴湘杰,周蒂,庞雄,等.白云凹陷地球物理场及深部结构特征[J].热带海洋学报,2005,24(2):62—69.
1)庞雄.1988.对白云地区早中新世岩隆的讨论.珠江口盆地(东部)石油地质科技报告集第二集(下册),581—597.
[2]朱伟林,黎明碧,吴培康.珠江口盆地珠三坳陷石油体系[J].石油勘探与开发,1997,24(6):21—23.
[3]黄正吉.珠江口盆地陆相烃原岩与油气生成[J].中国海上油气(地质),1998,12(4):255—261.
[4]PANG Xiong,YANG Shaokun,ZHU Ming,et al.Deep-water fan systems and petroleum resources on the northernslope of the South China Sea[J].Acta Geologica Sinica,2004,78(3):626—631.
[5]邱燕,王英民,温宁,等.珠江口盆地白云凹陷陆坡区有利成藏组合带[J].海洋地质与第四纪地质,2005,25(1):93—98.
[6]彭大钧,陈长民,庞雄,等.南海珠江口盆地深水扇系统的发现[J].石油学报,2004,25(5):17—23.
[7]彭大钧,庞雄,陈长民,等.南海珠江深水扇系统的形成特征与控制因素[J].沉积学报,2006,24(1):10—18.
[8]KNIPE R J.Juxtaposition and seal diagrams to help analyzefault seals in hydrocarbon reservoirs[J].AAPG Bulletin,1997,81(2):187—195.
[9]WALSH J J,WATTERSON J,HEATH A E.Representa-tion and scaling of faults in fluid flow models[J].PetroleumGeoscience,1998,4:241—252.
[10]RICHARD H S.Fluid involvement in normal faulting[J].Journal of Geodynamics,2000,29:469—499.
[11]SMITH D A.Theoretical consideration of sealing and nose-aling faults[J].AAPG Bulletin,1966,15(1):14—27.
[12]ALLAN U S.Model for hydrocarbon migration and entrap-ment within faulted structures[J].AAPG Bulletin,1989,73(7):803—811.
[13]YIELDING G,FREEMAN B,NEEDHAM D T.Quantita-tive fault seal prediction[J].AAPG Bulletin,1997,81(6):897—917.
[14]陈汉宗,吴湘杰,周蒂,等.珠江口盆地新生代主要断裂特征和动力背景分析[J].热带海洋学报,2005,24(2):52—61.
[15]周蒂,王万银,庞雄,等.地球物理资料所揭示的南海东北部中生代俯冲增生带[J].中国科学D辑,2006,36(3):209—218.
[16]孙珍,庞雄,钟志洪,等.珠江口盆地白云凹陷新生代构造演化动力学[J].地学前缘,2005,12(4):489—498.
[17]孙龙涛,陈长民,詹文欢,等.应用分形几何预测珠江口盆地白云凹陷有利成藏区[J].中国海上油气,2006,18(4):241—246.
[18]黄春菊,周蒂,陈长民,等.深反射地震剖面所揭示的白云凹陷的深部地壳结构[J].科学通报,2005,50(10):1024—1031.
[19]吴湘杰,周蒂,庞雄,等.白云凹陷地球物理场及深部结构特征[J].热带海洋学报,2005,24(2):62—69.
1)庞雄.1988.对白云地区早中新世岩隆的讨论.珠江口盆地(东部)石油地质科技报告集第二集(下册),581—597.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心