合肥盆地白垩纪伸展构造格局
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摘要
合肥盆地早白垩世演化过程长期存在争议.利用最新的油气勘探地震资料,系统分析了盆地内主要断层及其东缘的郯庐断裂伸展活动在地震剖面上的构造表现,并在此基础上论述了合肥盆地东部白垩系朱巷组、响导铺组、张桥组的断裂—沉积响应.结合同位素年代学资料综合分析认为,合肥盆地伸展活动的起始时间为早白垩世中期,持续至古近纪末.同时采用2DMOVE模拟软件对断层的分析也支持了这一认识.该时期合肥盆地呈现复合式断陷构造格局,盆地东西部受北北东向郯庐断裂带与吴集断裂的伸展作用控制,出现了北北东向的半地堑式断陷盆地.同时,盆地北界及内部近东西向南倾断裂(寿县—定远断裂、肥中断裂、肥西—韩摆渡断裂)的伸展活动,又控制出现了近东西向、北断南超的半地堑式盆地,总体上为复合断陷盆地,其伸展活动发生在华北克拉通岩石圈减薄的背景下,与太平洋板块高角度俯冲有关.
The evolution of the Hefei basin is an unresolved problem.On the basis of new seismic data across the basin and Tan-Lu fault during the Cretaceous zone,we analyzed the tectonic framework of the basin and sedimentary features of the Cretaceous Zhuxiang,Xiangdaopu,Zhangqiao Formations.The results indicate that the extension of the Hefei basin possibly started in the mid Early Cretaceous and lasted to the Paleogene.The fault analysis by 2DMOVE modeling software also supports the idea.The Hefei basin presented a complex tectonic framework in this period;the eastern and the western borders of the basin were controlled by the Tanlu normal fault and the Wuji normal fault with a NNE direction,thus forming a semi-graben with a NNE strike.At the same time,the Shouxian,Feizhong,Feixi-Hanbaidu faults were formed with NS direction within the basin to form a semi-graben which onlapped in the south and faulted in the north.So the Hefei basin was a complex faulted-depression in this period.The extension happened under the lithospheric thinning setting of the North China Craton and was related to the high angular subduction of the Pacific plate.
The evolution of the Hefei basin is an unresolved problem.On the basis of new seismic data across the basin and Tan-Lu fault during the Cretaceous zone,we analyzed the tectonic framework of the basin and sedimentary features of the Cretaceous Zhuxiang,Xiangdaopu,Zhangqiao Formations.The results indicate that the extension of the Hefei basin possibly started in the mid Early Cretaceous and lasted to the Paleogene.The fault analysis by 2DMOVE modeling software also supports the idea.The Hefei basin presented a complex tectonic framework in this period;the eastern and the western borders of the basin were controlled by the Tanlu normal fault and the Wuji normal fault with a NNE direction,thus forming a semi-graben with a NNE strike.At the same time,the Shouxian,Feizhong,Feixi-Hanbaidu faults were formed with NS direction within the basin to form a semi-graben which onlapped in the south and faulted in the north.So the Hefei basin was a complex faulted-depression in this period.The extension happened under the lithospheric thinning setting of the North China Craton and was related to the high angular subduction of the Pacific plate.
引文
[1]Zhou J G,Zhao Z J,Deng H Y.Tectonic evolu-tion of the Hefei basin and analysis of its petrole-um potential.Acta Geologica Sinica,1999,73(1):15~24.(周进高,赵宗举,邓红应.合肥盆地构造演化及含油气性分析.地质学报,1999,73(1):15~24).
[2]Song C Z,Niu M L,Liu G S,et al.Inversionmechanism of Meso-Cenozoic basins of southernTan-Lu fault and its adjacent areas.Journal ofHefei University of Technology(Natural Sci-ences),2002,25(3):325~330.(宋传中,牛漫兰,刘国生等.郯庐断裂带南段及邻区中、新生代盆地的反转机制.合肥工业大学学报(自然科学),2002,25(3):325~330).
[3]Chen H Y,Shu L S,Zhang Y Y,et al.Mesozo-ic-cenozoic tectonic evolution of the Hefei basin.Geological Journal of China Universities,2004,10(2):250~256.(陈海云,舒良树,张云银等.合肥盆地中新生代构造演化.高校地质学报,2004,10(2):250~256).
[4]LI Y P,Wu S G,Han W G,et al.A study ongeophysical features of deep structures of theHefei basin and the southern Tan-Lu fault zone.Chinese Journal of Geophysics,2006,49(1):115~122.(李云平,吴时国,韩文功等.合肥盆地和郯庐断裂带南段深部地球物理特征研究.地球物理学报,2006,49(1):115~122).
[5]Zhu G,Niu M L,Liu G S,et al.Structural mag-matic and sedimentary events of the Tan-Lu faultbelt during its early cretaceous strike-slip move-ment.Acta Geologica Sinica,2002,76(3):325~334.(朱光,牛漫兰,刘国生等.郯庐断裂带早白垩世走滑运动中的构造、岩浆、沉积事件.地质学报,2002,76(3):325~334).
[6]Xu Z W,Yang R Y,Ren Q J.Character andgenesis of vein type gold deposits in the Xiaotianvolcanic basin in Anhui province.Journal of Nan-jing University(Natural Sciences),1993,29:658~669.(徐兆文,杨荣勇,任启江.安徽晓天—磨子潭火山岩盆地脉状金矿床特征及成因.南京大学学报(自然科学),1993,29:658~669).
[7]Zhu G,Niu M L,Liu G S,et al.(40)Ar/~(39)Ar dating for the strike-slip movement on theFeidong part of the Tan-Lu fault belt.Acta Geo-logica Sinica,2005,79(3):303~316.(朱光,牛漫兰,刘国生等.郯庐断裂带肥东段走滑运动的40Ar/39Ar法定年.地质学报,2005,79(3):303~316).
[8]Zhu G,Wang Y S,Wang D X,et al.Constraintsof foreland sedimentation and defor-mation on sy-norogenic motion of the Tan-Lu fault zone.Chi-nese Journal of Geology,2006,41(1):102~121.(朱光,王勇生,王道轩等.前陆沉积与变形对郯庐断裂带同造山运动的制约.地质科学,2006,41(1):102~121).
[9]Zhu G,Xu Y D,Liu G S,et al.Structural anddeformational characteristics of strike-slipping a-long the middle-southern sector of the Tan-Lufault zone.Chinese Journal of Geology,2006,41(2):226~241.(朱光,徐佑德,刘国生等.郯庐断裂带中-南段走滑构造特征与变形规律.地质科学,2006,41(2):226~241).
[10]Chen K R,Pan Y W,Chen X M.The EarlyCretaceous Qibao Shan caldera and the charac-teristics and Petrogenesis of volcanic-intrusivecomplex in Wulian county,Shandong province.Journal of Nanjing University(Natural Sci-ences),1993,29:92~103.(陈克荣,潘永伟,陈小明.山东五莲七宝山早白垩世破火山口与火山—侵入杂岩特征和成因.南京大学学报(自然科学),1993,29:92~103).
[11]Lee P J,Lu H F,Shi Y S.Study on the forma-tion and fault structures of the Dongpu depres-sion of Bohai Gulf,eastern China.Journal ofNanjing University(Natural Sciences),1995,31:128~139.(李鹏举,卢华复,施央申.渤海湾盆地东濮凹陷的形成及断裂构造研究.南京大学学报(自然科学),1995,31:128~139).
[12]Wu G Y,Liang X,Chen H J.An approach tothe Tancheng-Lujiang fault zone:Its creationevolution and character.Chinese Journal of Ge-ology(Scientia Geologica Sinica),2007,42(1):160~175.(吴根耀,梁兴,陈焕疆.试论郯城-庐江断裂带的形成、演化及其性质.地质科学,2007,42(1):160~175).
[13]Zhu G,Wang Y S,Liu G S,et al.40Ar/39Ardating of strike-slip motion on the Tan-Lu faultzone,East China.Journal of Structural Geolo-gy.2005,27:1 379~1 398.
[14]Liu G S,Zhu G,Wang D X,et al.Strike-slipmovement on the Zhangbaling uplift segment ofthe Tan-Lu fault and the depositional responsein the Hefei basin.Acta Sedimentologica Sini-ca,2002,20(2):267~273.(刘国生,朱光,王道宣.郯庐断裂带张八岭隆起段走滑运动与合肥盆地的沉积响应.沉积学报,2002,20(2):267~273).
[15]Liu G S,Zhu G,Niu M L,et al.Depositional re-sponse of the Hefei basin to the syn-orogenic strik-slip activites on the Tan-Lu fault zone.Journal ofHefei University of Technology(Natural Sci-ences),2005,28(10):1 233~1 237.(刘国生,朱光,牛漫兰等.合肥盆地对郯庐断裂带同造山走滑活动的沉积响应.合肥工业大学学报(自然科学),2005,28(10):1 233~1 237).
[16]Liu G S,Zhu G,Niu M L,et al.Meso-cenozo-ic evolution of the Hefei basin(eastern part)and its response to activities of the Tan-lu faultzone.Chinese Journal of Geology(ScientiaGeologica Sinica),2006,41(2):256~269.(刘国生,朱光,牛漫兰等.合肥盆地东部中—新生代的演化及其对郯庐断裂带活动的响应.地质科学,2006,41(2):256~269).
[17]Zhao Z J,Zhu Y.The structure evolution and thepetroleum system in Hefei basin.Petroleum Ex-ploration and Development,2001,28(4):8~13.(赵宗举,朱琰.合肥盆地构造演化及油气系统分析.石油勘探与开发,2001,28(4):8~13).
[18]Yi W X,Zhao Z J,Li X T,et al.Nature of theHefei basin in early cretaceous and analysis ofits petroleum Potential.Geotectonica Et Metal-logenia,2003,27(1):64~71.(易万霞,赵宗举,李学田等.早白垩世合肥盆地性质及含油气性分析.大地构造与成矿学,2003,27(1):64~71).
[19]Wang Y S,Zhu G,Song C Z,et al.(40)Ar~(39)Ar geochronology records of transition fromstrike-slip to extension in the Tan-Lu fault zone oneastern terminal of the Dabie mountains.ChineseJournal of Geology(Scientia Geologica Sinica),2006,41(2):242~255.(王勇生,朱光,宋传中等.大别山东端郯庐断裂带由走滑向伸展运动转换的(40)Ar~(39)Ar年代学记录.地质科学,2006,41(2):242~255).
[20]Zhang Y Q,Zhao Y,Dong S W,et al.Tecton-ic evolution stages of the early Cretaceous riftbasins in Eastern China and adjacent areas andtheir geodynamic background.Earth ScienceFrontiers,2004,11(3):123~133.(张岳桥,赵越,董树文等.中国东部及邻区早白垩世裂陷盆地构造演化阶段.地学前缘,2004,11(3):123~133).
[21]Wang X F,Li Z J,Chen B L,et al.On Tan-LuFan lt zone.Beijing:Geology PublishingHouse,2000,215~217.(王小凤,李中坚,陈柏林等.郯庐断裂带.北京:地质出版社,2000,215~217).
[22]Zhao Y,Yang Z Y,Ma X H.Geotectonic tran-sition from Paleoasian system and Paleotethyansystem to Paleopacific active continental marginin eastern Asia.Chinese Journal of Geology,1994,29(2):105~114.(赵越,杨振宇,马醒华.东亚大地构造发展的重要转折.地质科学,1994,29(2):105~114).
[23]Zhang,K J,Zhu J X.Intracontinental deforma-tion of South China due to penetration of NorthChina:Fold and thrust structures and their ore-controlling in southern Anhui,South China.Journal of Nanjing University(Natural Sci-ences),2003,39:745~753.(张开均,朱君星.华北大陆楔入的华南板内效应:安徽沿江台阶式逆冲推覆构造及其控矿作用.南京大学学报(自然科学),2003,39:745~753.
[24]Engebretson D C,Cox A,Gordon R G.Rela-tive motions between oceanic and continentalplates in the Pacific basin.The Geological Soci-ety of America,Special Paper,1985,206:1~59.
[25]Maruyama S,Isozaki Y,Kimura G,et al.Pa-leogeographic maps of the Japanese Islands:Plate tectonic systhesis from 750 Ma to thepresent.The Island:Arc,1997,6:121~142.
[26]Sun T,Zhou X M.Late Mesozoic extension inSoutheast China:Petrologic symbols.Journalof Nanjing University(Natural Sciences),2002,38:737~746.(孙涛,周新民.中国东南部晚中生代伸展应力体制的岩石学标志.南京大学学报(自然科学),2002,38:737~746).
[27]Vanderhaeghe O,Teyssier C.Crustal-scalerheological transition during late-orogenic col-lapse.Tectonophysics,2001,335:211~228.
[2]Song C Z,Niu M L,Liu G S,et al.Inversionmechanism of Meso-Cenozoic basins of southernTan-Lu fault and its adjacent areas.Journal ofHefei University of Technology(Natural Sci-ences),2002,25(3):325~330.(宋传中,牛漫兰,刘国生等.郯庐断裂带南段及邻区中、新生代盆地的反转机制.合肥工业大学学报(自然科学),2002,25(3):325~330).
[3]Chen H Y,Shu L S,Zhang Y Y,et al.Mesozo-ic-cenozoic tectonic evolution of the Hefei basin.Geological Journal of China Universities,2004,10(2):250~256.(陈海云,舒良树,张云银等.合肥盆地中新生代构造演化.高校地质学报,2004,10(2):250~256).
[4]LI Y P,Wu S G,Han W G,et al.A study ongeophysical features of deep structures of theHefei basin and the southern Tan-Lu fault zone.Chinese Journal of Geophysics,2006,49(1):115~122.(李云平,吴时国,韩文功等.合肥盆地和郯庐断裂带南段深部地球物理特征研究.地球物理学报,2006,49(1):115~122).
[5]Zhu G,Niu M L,Liu G S,et al.Structural mag-matic and sedimentary events of the Tan-Lu faultbelt during its early cretaceous strike-slip move-ment.Acta Geologica Sinica,2002,76(3):325~334.(朱光,牛漫兰,刘国生等.郯庐断裂带早白垩世走滑运动中的构造、岩浆、沉积事件.地质学报,2002,76(3):325~334).
[6]Xu Z W,Yang R Y,Ren Q J.Character andgenesis of vein type gold deposits in the Xiaotianvolcanic basin in Anhui province.Journal of Nan-jing University(Natural Sciences),1993,29:658~669.(徐兆文,杨荣勇,任启江.安徽晓天—磨子潭火山岩盆地脉状金矿床特征及成因.南京大学学报(自然科学),1993,29:658~669).
[7]Zhu G,Niu M L,Liu G S,et al.(40)Ar/~(39)Ar dating for the strike-slip movement on theFeidong part of the Tan-Lu fault belt.Acta Geo-logica Sinica,2005,79(3):303~316.(朱光,牛漫兰,刘国生等.郯庐断裂带肥东段走滑运动的40Ar/39Ar法定年.地质学报,2005,79(3):303~316).
[8]Zhu G,Wang Y S,Wang D X,et al.Constraintsof foreland sedimentation and defor-mation on sy-norogenic motion of the Tan-Lu fault zone.Chi-nese Journal of Geology,2006,41(1):102~121.(朱光,王勇生,王道轩等.前陆沉积与变形对郯庐断裂带同造山运动的制约.地质科学,2006,41(1):102~121).
[9]Zhu G,Xu Y D,Liu G S,et al.Structural anddeformational characteristics of strike-slipping a-long the middle-southern sector of the Tan-Lufault zone.Chinese Journal of Geology,2006,41(2):226~241.(朱光,徐佑德,刘国生等.郯庐断裂带中-南段走滑构造特征与变形规律.地质科学,2006,41(2):226~241).
[10]Chen K R,Pan Y W,Chen X M.The EarlyCretaceous Qibao Shan caldera and the charac-teristics and Petrogenesis of volcanic-intrusivecomplex in Wulian county,Shandong province.Journal of Nanjing University(Natural Sci-ences),1993,29:92~103.(陈克荣,潘永伟,陈小明.山东五莲七宝山早白垩世破火山口与火山—侵入杂岩特征和成因.南京大学学报(自然科学),1993,29:92~103).
[11]Lee P J,Lu H F,Shi Y S.Study on the forma-tion and fault structures of the Dongpu depres-sion of Bohai Gulf,eastern China.Journal ofNanjing University(Natural Sciences),1995,31:128~139.(李鹏举,卢华复,施央申.渤海湾盆地东濮凹陷的形成及断裂构造研究.南京大学学报(自然科学),1995,31:128~139).
[12]Wu G Y,Liang X,Chen H J.An approach tothe Tancheng-Lujiang fault zone:Its creationevolution and character.Chinese Journal of Ge-ology(Scientia Geologica Sinica),2007,42(1):160~175.(吴根耀,梁兴,陈焕疆.试论郯城-庐江断裂带的形成、演化及其性质.地质科学,2007,42(1):160~175).
[13]Zhu G,Wang Y S,Liu G S,et al.40Ar/39Ardating of strike-slip motion on the Tan-Lu faultzone,East China.Journal of Structural Geolo-gy.2005,27:1 379~1 398.
[14]Liu G S,Zhu G,Wang D X,et al.Strike-slipmovement on the Zhangbaling uplift segment ofthe Tan-Lu fault and the depositional responsein the Hefei basin.Acta Sedimentologica Sini-ca,2002,20(2):267~273.(刘国生,朱光,王道宣.郯庐断裂带张八岭隆起段走滑运动与合肥盆地的沉积响应.沉积学报,2002,20(2):267~273).
[15]Liu G S,Zhu G,Niu M L,et al.Depositional re-sponse of the Hefei basin to the syn-orogenic strik-slip activites on the Tan-Lu fault zone.Journal ofHefei University of Technology(Natural Sci-ences),2005,28(10):1 233~1 237.(刘国生,朱光,牛漫兰等.合肥盆地对郯庐断裂带同造山走滑活动的沉积响应.合肥工业大学学报(自然科学),2005,28(10):1 233~1 237).
[16]Liu G S,Zhu G,Niu M L,et al.Meso-cenozo-ic evolution of the Hefei basin(eastern part)and its response to activities of the Tan-lu faultzone.Chinese Journal of Geology(ScientiaGeologica Sinica),2006,41(2):256~269.(刘国生,朱光,牛漫兰等.合肥盆地东部中—新生代的演化及其对郯庐断裂带活动的响应.地质科学,2006,41(2):256~269).
[17]Zhao Z J,Zhu Y.The structure evolution and thepetroleum system in Hefei basin.Petroleum Ex-ploration and Development,2001,28(4):8~13.(赵宗举,朱琰.合肥盆地构造演化及油气系统分析.石油勘探与开发,2001,28(4):8~13).
[18]Yi W X,Zhao Z J,Li X T,et al.Nature of theHefei basin in early cretaceous and analysis ofits petroleum Potential.Geotectonica Et Metal-logenia,2003,27(1):64~71.(易万霞,赵宗举,李学田等.早白垩世合肥盆地性质及含油气性分析.大地构造与成矿学,2003,27(1):64~71).
[19]Wang Y S,Zhu G,Song C Z,et al.(40)Ar~(39)Ar geochronology records of transition fromstrike-slip to extension in the Tan-Lu fault zone oneastern terminal of the Dabie mountains.ChineseJournal of Geology(Scientia Geologica Sinica),2006,41(2):242~255.(王勇生,朱光,宋传中等.大别山东端郯庐断裂带由走滑向伸展运动转换的(40)Ar~(39)Ar年代学记录.地质科学,2006,41(2):242~255).
[20]Zhang Y Q,Zhao Y,Dong S W,et al.Tecton-ic evolution stages of the early Cretaceous riftbasins in Eastern China and adjacent areas andtheir geodynamic background.Earth ScienceFrontiers,2004,11(3):123~133.(张岳桥,赵越,董树文等.中国东部及邻区早白垩世裂陷盆地构造演化阶段.地学前缘,2004,11(3):123~133).
[21]Wang X F,Li Z J,Chen B L,et al.On Tan-LuFan lt zone.Beijing:Geology PublishingHouse,2000,215~217.(王小凤,李中坚,陈柏林等.郯庐断裂带.北京:地质出版社,2000,215~217).
[22]Zhao Y,Yang Z Y,Ma X H.Geotectonic tran-sition from Paleoasian system and Paleotethyansystem to Paleopacific active continental marginin eastern Asia.Chinese Journal of Geology,1994,29(2):105~114.(赵越,杨振宇,马醒华.东亚大地构造发展的重要转折.地质科学,1994,29(2):105~114).
[23]Zhang,K J,Zhu J X.Intracontinental deforma-tion of South China due to penetration of NorthChina:Fold and thrust structures and their ore-controlling in southern Anhui,South China.Journal of Nanjing University(Natural Sci-ences),2003,39:745~753.(张开均,朱君星.华北大陆楔入的华南板内效应:安徽沿江台阶式逆冲推覆构造及其控矿作用.南京大学学报(自然科学),2003,39:745~753.
[24]Engebretson D C,Cox A,Gordon R G.Rela-tive motions between oceanic and continentalplates in the Pacific basin.The Geological Soci-ety of America,Special Paper,1985,206:1~59.
[25]Maruyama S,Isozaki Y,Kimura G,et al.Pa-leogeographic maps of the Japanese Islands:Plate tectonic systhesis from 750 Ma to thepresent.The Island:Arc,1997,6:121~142.
[26]Sun T,Zhou X M.Late Mesozoic extension inSoutheast China:Petrologic symbols.Journalof Nanjing University(Natural Sciences),2002,38:737~746.(孙涛,周新民.中国东南部晚中生代伸展应力体制的岩石学标志.南京大学学报(自然科学),2002,38:737~746).
[27]Vanderhaeghe O,Teyssier C.Crustal-scalerheological transition during late-orogenic col-lapse.Tectonophysics,2001,335:211~228.
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