东海西湖凹陷沉降史与构造演化
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摘要
本文利用钻井及地震剖面资料获取现今地层厚度数据,通过去压实、构造剥蚀量及沉积物负荷校正,计算不同时期的沉降量及沉降速率,恢复凹陷构造沉降史;在此基础上应用McKenzie的均一多幕拉伸模型计算单井拉伸因子β,其结果表明西湖凹陷由北向南雁列式开裂成盆;综合构造沉降、拉伸因子计算结果,并结合构造应力场特征,本文将西湖凹陷的新生代构造演化划分为左行拉伸裂谷、热沉降和右行拉伸裂谷三大阶段。
The Xihu depression is located in the northeast of Eastern China Shelf basin.With the drilling and seismic reflection profile data,stratigraphic unit depth and its lithologic association are given to describe present sedimentary column,compaction coefficients and surface porosity of each strata sequence.It is calculated by geometric method used to calculate the depositional amount and subsiding rate of each depositing period,to review the sedimentary process and burial history by back-stripping modeling.According to McKenzie's uniform lithosphere stretching modal,this paper analyzes the tectonic subsidence history and evolution of the Xihu depression by forward and reward modeling.The effect of eroding amount and sedimentary loading has been considered in the process of calculation.The sedimentary and tectonic subsiding rate history shows the character of three stage evolution:accelerate,decelerate and reaccelerate stages.Stretching factor β shows echelon distribution in plan map,and that the value of northern and southern sub-depressions decreases from north to south.The calculation result of tectonic subsidence history and stretching factor indicates that the echelon rifting of Xihu depression occurred from north to south.According to the character of stress field,the Cenozoic tectonic evolution of the Xihu depression could be divided into three stages:sinistral strike rifting(E1-E3),following thermal subsidence(N1) and late dextral strike rifting(N1-Q).
The Xihu depression is located in the northeast of Eastern China Shelf basin.With the drilling and seismic reflection profile data,stratigraphic unit depth and its lithologic association are given to describe present sedimentary column,compaction coefficients and surface porosity of each strata sequence.It is calculated by geometric method used to calculate the depositional amount and subsiding rate of each depositing period,to review the sedimentary process and burial history by back-stripping modeling.According to McKenzie's uniform lithosphere stretching modal,this paper analyzes the tectonic subsidence history and evolution of the Xihu depression by forward and reward modeling.The effect of eroding amount and sedimentary loading has been considered in the process of calculation.The sedimentary and tectonic subsiding rate history shows the character of three stage evolution:accelerate,decelerate and reaccelerate stages.Stretching factor β shows echelon distribution in plan map,and that the value of northern and southern sub-depressions decreases from north to south.The calculation result of tectonic subsidence history and stretching factor indicates that the echelon rifting of Xihu depression occurred from north to south.According to the character of stress field,the Cenozoic tectonic evolution of the Xihu depression could be divided into three stages:sinistral strike rifting(E1-E3),following thermal subsidence(N1) and late dextral strike rifting(N1-Q).
引文
陈斯忠.2003.东海盆地主要地质特点及找气方向.中国海上油气(地质),17(1):6-13.
邓属予,王源,汤镇辉,黄奇瑜,王廷章,游明圣,柯雪温.1992.台湾北部早第三纪沉积盆地的地体构造背景.台湾石油通讯,9(2):13-25.
邓属予.1994.台湾第三纪陆缘盆地的大地构造演化.海洋地质译丛,(1):27-33.
高德章,赵金海,薄玉玲,唐建.2006.东海及邻近地区岩石圈三维结构研究.地质科学,41(1):10-26.
高红芳,曾祥辉,刘振湖,白志琳.2005.南海礼乐盆地沉降史模拟及构造演化特征分析.大地构造与成矿学,29(3):385-390.
韩波,张训华,裴建新,张维冈.2007.东海及其邻域壳-幔结构与展布特征.地球物理学进展,22(2):376-382.
郝重涛,叶洪.1999.东海陆架盆地新生代扩张率的估算.地质科学,34(1):29-39.
江兴歌,朱建辉,蒋洪堪.1998.应用双层拉张模式研究冲绳海槽的拉张史.石油实验地质,20(4):398-404.
刘保华,徐世浙.1998.冲绳海槽沉降和热演化模式初探.海洋地质与第四纪地质,18(1):59-64.
孙肇才.2004.从东海石油地质重要进展看西太平洋大陆边缘新生代构造盆地的构造演化.海相油气地质,9(1-2):1-17.
陶瑞明.1994.从西太平洋板块构造探讨东海陆架盆地形成机制和类型划分.中国海上油气(地质),8(1):14-20.
王锋,朱文斌,胡德昭,徐鸣洁,赵忠岩.2005.东海盆地长江坳陷新生代反转构造研究.大地构造与成矿学,29(2):176-181.
王国纯.1987.东海陆架盆地的形成与演化.石油学报,8(4):18-25.
王震,张明利,王子煜,武法东,王林生.2005a.东海陆架盆地西湖凹陷不整合面剥蚀厚度恢复.石油实验地质,27(1):90-93.
王震,张明利,武法东,王子煜,王林生.2005b.东海盆地西湖凹陷地层剥蚀厚度研究.新疆石油地质,26(2):175-177.
王子煜,张明利.2005.东海西湖凹陷新生界主要不整合面地层剥蚀厚度恢复.地质论评,51(3):309-318.
武国忠,刘安,郭翔燕,吴世敏.2007.黑龙江省三江盆地绥滨坳陷沉降史分析.大地构造与成矿学,31(4):412-417.
胥颐,刘建华,郝天珧,刘劲松,李志伟.2006.中国东部海域及邻区岩石层地幔的P波速度结构与构造分析.地球物理学报,49(4):1053-1061.
许忠淮,吴少武.1997.南黄海和东海地区现代构造应力场特征的研究.地球物理学报,40(6):773-781.
许忠淮,徐国庆,吴少武.1999.东海地区现代构造应力场及其成因探讨.地震学报,21(5):495-501.
俞何兴.1991.东海盆地的地质构造格架与演化史.福建地质科技情报,(3):23-33.
张琴华.1994.东海地区壳体结构演化及其盆地形成机制探讨.大地构造与成矿学,18(4):311-320.
赵金海.2004.东海中新生代盆地成因机制和演化(上).海洋石油,24(4):6-14.
郑求根,周祖翼,蔡立国,陆永德,曹清古.2005.东海陆架盆地中新生代构造背景及演化.石油天然气地质,26(2):197-201.
周瑶琪,吴智平.2000.地层间断面的时间结构研究.北京:地质出版社,18-44.
周祖翼,贾健谊,李家彪,杨凤丽.2002.东海西湖凹陷反转构造定量研究:来自裂变径迹分析数据的约束.海洋地质与第四纪地质,22(1):63-67.
Emmerson B and McKenzie D.2007.Thermal structure and seis-micity of subducting lithosphere.Physics ofthe Earth andPlanetary Interiors,163:191-208.
McKenzie D.1978.Some remarks on the development of sedimentarybasins.Earth and Planetary Science Letters,40:25-32.
McKenzie D,Jackson J and Priestley K.2005.Thermal structureof oceanic and continental lithosphere.Earth and PlanetaryScience Letters,233:337-349.
Pubellier M,Ali J and Monnier C.2003.Cenozoic Plate inter-action of the Australia and Philippine Sea Plates:"hit-and-run"tectonics.Tectonophysics,363:181-199.
Pubellier M,Monnier C,Maury R and Tamayo R.2004.Platekinematics,origin and tectonic emplacement of supra-sub-duction ophiolites in SE Asia.Tectonophysics,392:9-36.
Sclater J G and Christie P A F.1980.Continental stretching:Anexplanation of the post-Mid-Cretaceous subsidence of thecentral North Sea basin.Journal ofGeophysical Research,85:3711-3739.
Sibuet J C,Hsu S K,Pichon X L,Le Formal J P,Reed D R,Moore G and Liu C S.2002.East Asia plate tectonicssince15Ma:Constraints from the Taiwan region.Tectono-physics,344:103-134.
邓属予,王源,汤镇辉,黄奇瑜,王廷章,游明圣,柯雪温.1992.台湾北部早第三纪沉积盆地的地体构造背景.台湾石油通讯,9(2):13-25.
邓属予.1994.台湾第三纪陆缘盆地的大地构造演化.海洋地质译丛,(1):27-33.
高德章,赵金海,薄玉玲,唐建.2006.东海及邻近地区岩石圈三维结构研究.地质科学,41(1):10-26.
高红芳,曾祥辉,刘振湖,白志琳.2005.南海礼乐盆地沉降史模拟及构造演化特征分析.大地构造与成矿学,29(3):385-390.
韩波,张训华,裴建新,张维冈.2007.东海及其邻域壳-幔结构与展布特征.地球物理学进展,22(2):376-382.
郝重涛,叶洪.1999.东海陆架盆地新生代扩张率的估算.地质科学,34(1):29-39.
江兴歌,朱建辉,蒋洪堪.1998.应用双层拉张模式研究冲绳海槽的拉张史.石油实验地质,20(4):398-404.
刘保华,徐世浙.1998.冲绳海槽沉降和热演化模式初探.海洋地质与第四纪地质,18(1):59-64.
孙肇才.2004.从东海石油地质重要进展看西太平洋大陆边缘新生代构造盆地的构造演化.海相油气地质,9(1-2):1-17.
陶瑞明.1994.从西太平洋板块构造探讨东海陆架盆地形成机制和类型划分.中国海上油气(地质),8(1):14-20.
王锋,朱文斌,胡德昭,徐鸣洁,赵忠岩.2005.东海盆地长江坳陷新生代反转构造研究.大地构造与成矿学,29(2):176-181.
王国纯.1987.东海陆架盆地的形成与演化.石油学报,8(4):18-25.
王震,张明利,王子煜,武法东,王林生.2005a.东海陆架盆地西湖凹陷不整合面剥蚀厚度恢复.石油实验地质,27(1):90-93.
王震,张明利,武法东,王子煜,王林生.2005b.东海盆地西湖凹陷地层剥蚀厚度研究.新疆石油地质,26(2):175-177.
王子煜,张明利.2005.东海西湖凹陷新生界主要不整合面地层剥蚀厚度恢复.地质论评,51(3):309-318.
武国忠,刘安,郭翔燕,吴世敏.2007.黑龙江省三江盆地绥滨坳陷沉降史分析.大地构造与成矿学,31(4):412-417.
胥颐,刘建华,郝天珧,刘劲松,李志伟.2006.中国东部海域及邻区岩石层地幔的P波速度结构与构造分析.地球物理学报,49(4):1053-1061.
许忠淮,吴少武.1997.南黄海和东海地区现代构造应力场特征的研究.地球物理学报,40(6):773-781.
许忠淮,徐国庆,吴少武.1999.东海地区现代构造应力场及其成因探讨.地震学报,21(5):495-501.
俞何兴.1991.东海盆地的地质构造格架与演化史.福建地质科技情报,(3):23-33.
张琴华.1994.东海地区壳体结构演化及其盆地形成机制探讨.大地构造与成矿学,18(4):311-320.
赵金海.2004.东海中新生代盆地成因机制和演化(上).海洋石油,24(4):6-14.
郑求根,周祖翼,蔡立国,陆永德,曹清古.2005.东海陆架盆地中新生代构造背景及演化.石油天然气地质,26(2):197-201.
周瑶琪,吴智平.2000.地层间断面的时间结构研究.北京:地质出版社,18-44.
周祖翼,贾健谊,李家彪,杨凤丽.2002.东海西湖凹陷反转构造定量研究:来自裂变径迹分析数据的约束.海洋地质与第四纪地质,22(1):63-67.
Emmerson B and McKenzie D.2007.Thermal structure and seis-micity of subducting lithosphere.Physics ofthe Earth andPlanetary Interiors,163:191-208.
McKenzie D.1978.Some remarks on the development of sedimentarybasins.Earth and Planetary Science Letters,40:25-32.
McKenzie D,Jackson J and Priestley K.2005.Thermal structureof oceanic and continental lithosphere.Earth and PlanetaryScience Letters,233:337-349.
Pubellier M,Ali J and Monnier C.2003.Cenozoic Plate inter-action of the Australia and Philippine Sea Plates:"hit-and-run"tectonics.Tectonophysics,363:181-199.
Pubellier M,Monnier C,Maury R and Tamayo R.2004.Platekinematics,origin and tectonic emplacement of supra-sub-duction ophiolites in SE Asia.Tectonophysics,392:9-36.
Sclater J G and Christie P A F.1980.Continental stretching:Anexplanation of the post-Mid-Cretaceous subsidence of thecentral North Sea basin.Journal ofGeophysical Research,85:3711-3739.
Sibuet J C,Hsu S K,Pichon X L,Le Formal J P,Reed D R,Moore G and Liu C S.2002.East Asia plate tectonicssince15Ma:Constraints from the Taiwan region.Tectono-physics,344:103-134.
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