重力水平梯度矢量法在琼东南盆地基底断裂划分上的应用
|
摘要
基底断裂与盆地是一对相互影响的伴生构造,断裂活动控制盆地内沉积填充和构造样式以及后期资源的分布。本文利用琼东南盆地2′×2′的自由空间重力异常,在进行地形校正、布格异常校正得到布格重力异常的基础上求得重力水平梯度矢量。尝试利用重力水平梯度矢量对基底断裂进行划分并取得良好效果:在盆地基底划分出48条断裂,并将其分为3个等级,其中一级断裂5条,二级断裂8条,三级断裂35条;将确定的断裂与其他地质、地球物理方法(地震剖面)确定的断裂进行比较,发现在主要格架上具有一致性;重力水平梯度矢量法与其他解释方法比较具有成本低廉、方法简单、结果直观的优点。
Basement fault is an associated structure with the basin.The deposition in a basin and the tectonic style as well as the distribution of resources are determined by basement faults.On the basis of 2-minute Free Air Gravity anomaly database in the Southeast Hainan Basin of the South China Sea,the Bouguer anomaly is obtained after topography correction and Bouguer correction.The gravity horizontal gradient vector data are obtained from the analysis of the Bouguer anomaly.We are able to find 48 basement faults in the basin using the gravity horizontal gradient vector data,which are divided into three ranks,in-cluding five first rank faults,eight second rank faults,and 35 third rank faults.Comparing these findings with the results using other geological and geophysical methods such as seismic profiles,we find all results are consistent in terms of the main tec-tonic structure.However,the gravity horizontal gradient vector method has the advantages of being inexpensive,easy,and intuitive.
Basement fault is an associated structure with the basin.The deposition in a basin and the tectonic style as well as the distribution of resources are determined by basement faults.On the basis of 2-minute Free Air Gravity anomaly database in the Southeast Hainan Basin of the South China Sea,the Bouguer anomaly is obtained after topography correction and Bouguer correction.The gravity horizontal gradient vector data are obtained from the analysis of the Bouguer anomaly.We are able to find 48 basement faults in the basin using the gravity horizontal gradient vector data,which are divided into three ranks,in-cluding five first rank faults,eight second rank faults,and 35 third rank faults.Comparing these findings with the results using other geological and geophysical methods such as seismic profiles,we find all results are consistent in terms of the main tec-tonic structure.However,the gravity horizontal gradient vector method has the advantages of being inexpensive,easy,and intuitive.
引文
[1]谢文彦,张一伟,孙珍,等.琼东南盆地断裂构造与成因机制[J].海洋地质与第四纪地质,2007,27(1):71-78.
[2]蔡乾忠.中国海域油气地质学[M].北京:海洋出版社,2005:161-167.
[3]邱忠建,龚在升.中国油气勘探:第四卷近海油气区[M].北京:地质出版社,1999:911-963.
[4]孙珍,钟志洪,周蒂,等.红河断裂带的新生代变形机制及莺歌海盆地的实验数据[J].热带海洋学报,2003,22(2):1-9.
[5]万志峰,夏斌,何家雄,等.南海北部莺歌海盆地与琼东南盆地油气成藏条件比较研究[J].天然气地球科学.2007,18(5):648-652.
[6]龚再升,李思田,谢承俊,等.南海北部大陆边缘盆地分布与油气聚集[M].北京:科学出版社,1997:5-24.
[7]龚再升,杨甲明,杨祖序,等.中国近海大油气田[M].北京:石油工业出版社,1997:195-223.
[8]周小鹰,魏魁生.QDN盆地层序地层及生储盖组合分析[J].石油与天然气地质,2000,21(3):244-248.
[9]李绪宣,朱光辉.琼东南盆地断裂系统及油气输导[J].中国海上油气,2005,17(1):1-7.
[10]SUN QILING,WU SHIGUO,YAO GENSHUN,et al.Cha-racteristics and formation mechanism of polygonal faults insoutheast hainan basin,northern south china sea[J].Journalof Earth Science,2009,20(1):180-192.
[11]吴培康.琼东南盆地半地堑充填模型[J].中国海上油气(地质),1992,6(6):1-7.
[12]于俊峰,段如泰.琼东南盆地2号断裂东带发育特征及形成机理[J].大地构造及成矿学,2008,32(3):293-299.
[13]魏魁生,崔旱云,叶淑芬,等.琼东南盆地高精度层序地层学研究[J].地球科学,2001,26(1):59-66.
[14]李绪宣,钟志洪,董伟良,等.琼东南盆地古近纪裂陷构造特征及其动力学机制[J].石油勘探与开发,2006,33(6):713-721.
[15]李绪宣,朱光辉.琼东南盆地断裂系统及其油气疏导特征[J].中国海上油气,2005,17(1):1-7.
[16]何家雄,施小斌,阎贫,等.南海北部边缘盆地油气地质特征与勘探方向[J].新疆石油地质,2007,28(2):129-135.
[17]王家林,吴建生,陈冰,等.珠江口盆地和东海陆架盆地基底结构的综合地球物理研究[M].上海:同济大学出版社,1997:1-58.
[18]赵俊猛,卢造勋,姚长利,等.准噶尔盆地基底断裂的重磁学研究[J].地震地质,2008,30(1):132-143.
[19]于鹏,王家林,钟慧智,等.琼东南盆地基底结构综合地球物理研究[J].中国海上油气(地质),1999,13(6):443-450.
[20]HOOD P.Gradient measurement in aeromagnetic survey-ing[J].Geophysics,1965,30:891-902.
[21]HOOD P,MCCLURE P J.Gradient measurements in groundmagnetic prospecting[J].Geophysics,1965,(30):403-410.
[22]Ramadass G,Rao S,Raja Mohammed,A.Analysis of gra-vimagnetic anomalies by horizontal gradients[J].Journal ofEarth System Science,1986,95(3):343-349.
[23]唐仁敏,张健.利用重力梯度反演南海西南海盆深部构造[J].地质力学学报,2006,12(1):49-54.
[24]马宗晋,高祥林,宋正范.中国布格异常水平梯度图的判读和构造解释[J].地球物理学报,2006,49(1):106-114
[25]EDWARDS D J,LYATSKY H V,BROWN R J.Interpretationof gravity and magnetic data using the Horizontal-gradientvector method in the western Canada basin.First Break,1996,14(6):231-245.
[26]余钦范,楼海.水平梯度法提取重磁源边界位置[J].物探化探计算技术,1994,16(4):363-367
[27]黄临平,管志宁.利用磁异常总梯度模确定磁源边界位置[J].华东地质学院学报,1998,21(2):143-150
[28]赵希刚,吴汉宁,柏冠军,等.重磁异常解释断裂构造的处理方法及图示技术[J].地球物理学进展,2008,23(2):414-421.
[29]NOAA/NGDC.ETOPO2V2 Global Gridded 2-minute Data-base CD-ROM[EB/OL].[2009-12-22].http://www.ngdc.noaa.gov/mgg/%20global/relier/ETOPO2/ETOPO2v2-2006.
[30]王家林,王一新,万明浩.石油重磁解释[M].北京:石油工业出版社,1991:3-9.
[31]杨恬,吴世敏,刘海龄,等.南海西北部重磁场及其深部构造特征[J].大地构造与成矿学,2005,29(3):364-370.
[32]杨恬.南海西北部地球物理场特征及其构造意义[D].广州:中国科学院南海海洋研究所,2004:1-66.
[33]吴湘杰.珠江口盆地白云凹陷地质地球物理综合研究[D].广州:中国科学院南海海洋研究所,2005:1-70.
[2]蔡乾忠.中国海域油气地质学[M].北京:海洋出版社,2005:161-167.
[3]邱忠建,龚在升.中国油气勘探:第四卷近海油气区[M].北京:地质出版社,1999:911-963.
[4]孙珍,钟志洪,周蒂,等.红河断裂带的新生代变形机制及莺歌海盆地的实验数据[J].热带海洋学报,2003,22(2):1-9.
[5]万志峰,夏斌,何家雄,等.南海北部莺歌海盆地与琼东南盆地油气成藏条件比较研究[J].天然气地球科学.2007,18(5):648-652.
[6]龚再升,李思田,谢承俊,等.南海北部大陆边缘盆地分布与油气聚集[M].北京:科学出版社,1997:5-24.
[7]龚再升,杨甲明,杨祖序,等.中国近海大油气田[M].北京:石油工业出版社,1997:195-223.
[8]周小鹰,魏魁生.QDN盆地层序地层及生储盖组合分析[J].石油与天然气地质,2000,21(3):244-248.
[9]李绪宣,朱光辉.琼东南盆地断裂系统及油气输导[J].中国海上油气,2005,17(1):1-7.
[10]SUN QILING,WU SHIGUO,YAO GENSHUN,et al.Cha-racteristics and formation mechanism of polygonal faults insoutheast hainan basin,northern south china sea[J].Journalof Earth Science,2009,20(1):180-192.
[11]吴培康.琼东南盆地半地堑充填模型[J].中国海上油气(地质),1992,6(6):1-7.
[12]于俊峰,段如泰.琼东南盆地2号断裂东带发育特征及形成机理[J].大地构造及成矿学,2008,32(3):293-299.
[13]魏魁生,崔旱云,叶淑芬,等.琼东南盆地高精度层序地层学研究[J].地球科学,2001,26(1):59-66.
[14]李绪宣,钟志洪,董伟良,等.琼东南盆地古近纪裂陷构造特征及其动力学机制[J].石油勘探与开发,2006,33(6):713-721.
[15]李绪宣,朱光辉.琼东南盆地断裂系统及其油气疏导特征[J].中国海上油气,2005,17(1):1-7.
[16]何家雄,施小斌,阎贫,等.南海北部边缘盆地油气地质特征与勘探方向[J].新疆石油地质,2007,28(2):129-135.
[17]王家林,吴建生,陈冰,等.珠江口盆地和东海陆架盆地基底结构的综合地球物理研究[M].上海:同济大学出版社,1997:1-58.
[18]赵俊猛,卢造勋,姚长利,等.准噶尔盆地基底断裂的重磁学研究[J].地震地质,2008,30(1):132-143.
[19]于鹏,王家林,钟慧智,等.琼东南盆地基底结构综合地球物理研究[J].中国海上油气(地质),1999,13(6):443-450.
[20]HOOD P.Gradient measurement in aeromagnetic survey-ing[J].Geophysics,1965,30:891-902.
[21]HOOD P,MCCLURE P J.Gradient measurements in groundmagnetic prospecting[J].Geophysics,1965,(30):403-410.
[22]Ramadass G,Rao S,Raja Mohammed,A.Analysis of gra-vimagnetic anomalies by horizontal gradients[J].Journal ofEarth System Science,1986,95(3):343-349.
[23]唐仁敏,张健.利用重力梯度反演南海西南海盆深部构造[J].地质力学学报,2006,12(1):49-54.
[24]马宗晋,高祥林,宋正范.中国布格异常水平梯度图的判读和构造解释[J].地球物理学报,2006,49(1):106-114
[25]EDWARDS D J,LYATSKY H V,BROWN R J.Interpretationof gravity and magnetic data using the Horizontal-gradientvector method in the western Canada basin.First Break,1996,14(6):231-245.
[26]余钦范,楼海.水平梯度法提取重磁源边界位置[J].物探化探计算技术,1994,16(4):363-367
[27]黄临平,管志宁.利用磁异常总梯度模确定磁源边界位置[J].华东地质学院学报,1998,21(2):143-150
[28]赵希刚,吴汉宁,柏冠军,等.重磁异常解释断裂构造的处理方法及图示技术[J].地球物理学进展,2008,23(2):414-421.
[29]NOAA/NGDC.ETOPO2V2 Global Gridded 2-minute Data-base CD-ROM[EB/OL].[2009-12-22].http://www.ngdc.noaa.gov/mgg/%20global/relier/ETOPO2/ETOPO2v2-2006.
[30]王家林,王一新,万明浩.石油重磁解释[M].北京:石油工业出版社,1991:3-9.
[31]杨恬,吴世敏,刘海龄,等.南海西北部重磁场及其深部构造特征[J].大地构造与成矿学,2005,29(3):364-370.
[32]杨恬.南海西北部地球物理场特征及其构造意义[D].广州:中国科学院南海海洋研究所,2004:1-66.
[33]吴湘杰.珠江口盆地白云凹陷地质地球物理综合研究[D].广州:中国科学院南海海洋研究所,2005:1-70.
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