线形区域的主辅线反射地震调查方法
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摘要
本文提出主辅线反射地震法,它由一条主测线和1~2条辅测线共同组成一个反射地震观测系统,其中辅线位于主线的一侧或两侧,大致与主线平行,只在辅线上观测而不放炮.这种系统的成本仅比原常规单线增加20%左右,但是,它却可以同时取得三方面的调查成果:(1)主线常规反射地震剖面,(2)主线与辅线之间区域的表层地震波速层析图,(3)主线与辅线之中线上的反射地震剖面.用比地震剖面略高的费用,主辅线反射地震实现了了解线形区域下方侧向可对比的地质构造变化的目标,对线形区域的调查尤其适用,而且在中国大陆科学深钻孔区完成的主辅线反射地震调查证实了这一论断.这次主辅线反射地震法调查说明科学深钻孔区地下3000~3600m深度还可能有规模较大的榴辉岩体存在,现有金红石矿体储量有可能扩大若干倍.同时,主辅线反射地震法调查提供了一个后备孔位,它是将来扩大矿区储量的首选勘探孔位.
We suggest a new seismic data-acquisition system called the additional observation system,which consists of a main line and one or two additional lines that are approximately parallel to the main line but without any shot-point.The cost of the system is about 20% more than a traditional seismic reflection line,but it can produce three different investigation results as follows:(a)The traditional reflection profile along the main line;(b) the seismic velocity map between the mainline and the additional line via seismic tomography;and(c) an additional seismic reflection profile along the middle between the mainline and the additional line via 3-D seismic data processing.This system costs a little bit of more money to gain much more results,especially the side-variation of velocity and structures,very proper for investigation of linear areas.An experiment of this method has been carried out at the Chinese Continental Scientific Drilling site,proving that the suggested system is applicable and valuable.This experiment provides an optional hole-location for the scientific drilling,and reveals that there are deeply buried rutile-containing eclogite bodies existing beneath the drilling site.
We suggest a new seismic data-acquisition system called the additional observation system,which consists of a main line and one or two additional lines that are approximately parallel to the main line but without any shot-point.The cost of the system is about 20% more than a traditional seismic reflection line,but it can produce three different investigation results as follows:(a)The traditional reflection profile along the main line;(b) the seismic velocity map between the mainline and the additional line via seismic tomography;and(c) an additional seismic reflection profile along the middle between the mainline and the additional line via 3-D seismic data processing.This system costs a little bit of more money to gain much more results,especially the side-variation of velocity and structures,very proper for investigation of linear areas.An experiment of this method has been carried out at the Chinese Continental Scientific Drilling site,proving that the suggested system is applicable and valuable.This experiment provides an optional hole-location for the scientific drilling,and reveals that there are deeply buried rutile-containing eclogite bodies existing beneath the drilling site.
引文
[1]杨文采,程振炎,张春贺.中国科学钻探选址地球物理调查与大别-苏鲁岩石圈.地球学报,2003,24(5):391~404Yang W C,Cheng Z Y,Zhang C H.Geophysical investigation forsite-selection of Chinese continental scientific drilling and Dabie-Sululithosphere.Acta Geoscientia Sinica(in Chinese),2003,24(5):391~404
[2]杨文采,张春贺,朱光明.标定大陆科学钻探孔区地震反射体.地球物理学报,2002,45(3):370~384Yang W C,Zhang C H,Zhu G M.Calibration of seismic reflectorsinferred from observations at the Chinese continental drilling area.Chinese J.Geophys.(in Chinese),2002,45(3):370~384
[3]杨文采,杨午阳,程振炎.中国大陆科学钻探孔区三维地震资料的初步解释.岩石学报,2004,20(1):127~138Yang W C,Yang W Y,Cheng Z Y,et al.Interpretation of 3Dseismic reflection data in the Chinese Continental Scientific DrillingSite.Acta Petrologica Sinica(in Chinese),2004,20(1):127~138
[4]Cong B,Wang Q,Zhai M,et al.UHP metamorphic rocks in theDabie-Sulu region,China:their formation and exhumation.IslandArc,1994,3:135~150
[5]Liou J G,Maruyama S,Ernst W G.Seeing a mountain in a grain ofgarnet.Science,1997,27(4):48~49
[6]Ernst W G,Maruyama S,Wallis S.Buoyancy-driven,rapidexhumation of ultrahigh-pressure metamorphosed continental crust.Proc.National Academy of Sciences,1997,94:9532~9537
[7]Hacker B R,Sharp T,Zhang R Y,et al.Determining the origin ofultra-high pressure lherzolites.Science,1997,278(10):702~704
[8]许志琴,张泽民,刘福来等.中国大陆科学钻探主孔1200米构造柱及变形构造初步解析.岩石学报,2004,20(1):53~72Xu Z Q,Zhang Z M,Liu F L,et al.The structure profile of 0-1200m in the main borehole,Chinese Continental Scientific Drillingand its preliminary deformation analysis.Acta Petrologica Sinica(inChinese),2004,20(1):53~72
[9]杨文采,胡振远,程振炎等.郯城—涟水综合地球物理剖面.地球物理学报,1999,42(2):206~217Yang W C,Hu Z Y,Cheng Z Y,et al.Long profile of geophysicalinvestigations from Tanchen to Lianshui,east-central China.ChineseJ.Geophys.(in Chinese),1999,42(2):206~217
[10]杨文采,程振炎,陈国九等.苏鲁超高压变质带北部地球物理调查(I)-深反射地震.地球物理学报,1999,42(1):16~27Yang W C,Cheng Z Y,Chen G J,et al.Geophysical investigationsof northern Sulu UHPM belt(I):Deep seismic reflection.ChineseJ.Geophys.(in Chinese),1999,42(1):16~27
[11]杨文采,方慧,程振炎等.苏鲁超高压变质带北部地球物理调查(II)-非地震方法.地球物理学报,1999,42(4):508~519Yang W C,Fang H,Cheng Z Y,et al.Geophysical investigations ofnorthern Sulu UHPM belt(II):Non-seismic methods.Chinese J.Geophys.(in Chinese),1999,42(4):508~519
[12]姜枚,王有学,宿和平.宽频地震方法技术在地震探测工作中的应用.地质学报,2003,22(7):536~539Jiang M,Wang Y X,Su H P.Wide-frequency teleseis and itsapplication to seismic exploration.Acta Geologica Sinica(inChinese),2003,22(7):536~539
[13]Kern H,Jin Z,Gao S,et al.Physical properties of UHPM rocksfrom the Sulu terrain,eastern central China:implications for theseismic structure at Donghai(CCSD)drilling site.Tectonophysics,2002,354:315~330
[14]陈意,金振民,欧新功等.韧性剪切带中片麻岩和超高压榴辉岩变形特征及其与地震波速各向异性的关系.岩石学报,2004,20(1):97~108Chen Y,Jin Z M,Ou X G,et al.Deformation features of gneiss andUHP eclogite from ductile shear zone and its relation with seismicvelocity anisotroph:Evidences from core samples at depth of 680-1200m of CCSD.Acta Petrologica Sinica(in Chinese),2004,20(1):97~108
[15]Yang W C.Crustal structure and development of Dabie UHPMTerrane in East-Central China.Continental Dynamics,1998,3(1~2):86~95
[16]Yang W C.Analysis of deep intracontinental subduction.Episodes,2000,23(1):20~24
[17]Yang W C.Geophysical profiling across the Sulu ultra-high-pressuremetamorphic belt,Eastern China.Tectonophysics,2002,354:277~288
[18]Yang W C.Flat mantle reflectors in eastern China:possible evidenceof lithospheric thinning.Tectonophysics,2003,369(3-4):219~230
[19]杨文采,杨午阳,金振民等.苏鲁超高压变质带岩石圈地震组构.中国科学,2004,34(4):307~319Yang W C,Yang W Y,Jin Z M,et al.Lithospheric seismic fabricsof Sulu ultrahigh-pressure metamorphic belt.Science in China(inChinese),2005,48(5):585~600
[20]杨文采,汪集.苏鲁地区地壳岩浆底侵的地球物理判识.地质学报,2002,76(2):173~179Yang W C,Wang J Y.Geophysical evidences for crustal magmaticunderplating in Sulu area.Acta Geologica Sinica(in Chinese),2002,76(2):173~179
[21]杨文采,李幼铭等编著.应用地震层析成像.北京:地质出版社,1993.1~233Yang W C,Li Y M.Applied Seismic Tomography.Beijing:Geological Publishing House,1993.1~233
[22]杜剑渊,杨文采.跨孔地震层析成像的级联方法.地球物理学报,1991,34(6):771~780Du J Y,Yang W C.Cascade method of cross-hole tomography.Chinese J.Geophys.(in Chinese),1991,34(6):771~780
[23]杨文采,杜剑渊.层析成像新算法及其在工程检测中的应用.地球物理学报,1994,37(2):239~245Yang W C,Du J Y.New algorithm of seismic tomography withapplication to engineering detactions.Chinese J.Geophys.(inChinese),1994,37(2):239~245
[24]杨文采.地球物理反演和地震层析成像.北京:地质出版社,1989.1~212Yang W C.Geophysical Inversion and Seismic Tomography.Beijing:Geological Publishing House,1992.1~212
[25]杨文采.地球物理反演的理论与方法.北京:地质出版社,1997.1~246Yang W C.Theory and Methods in Geophysical Inversion.Beijing:Geological Publishing House,1992.1~246
[2]杨文采,张春贺,朱光明.标定大陆科学钻探孔区地震反射体.地球物理学报,2002,45(3):370~384Yang W C,Zhang C H,Zhu G M.Calibration of seismic reflectorsinferred from observations at the Chinese continental drilling area.Chinese J.Geophys.(in Chinese),2002,45(3):370~384
[3]杨文采,杨午阳,程振炎.中国大陆科学钻探孔区三维地震资料的初步解释.岩石学报,2004,20(1):127~138Yang W C,Yang W Y,Cheng Z Y,et al.Interpretation of 3Dseismic reflection data in the Chinese Continental Scientific DrillingSite.Acta Petrologica Sinica(in Chinese),2004,20(1):127~138
[4]Cong B,Wang Q,Zhai M,et al.UHP metamorphic rocks in theDabie-Sulu region,China:their formation and exhumation.IslandArc,1994,3:135~150
[5]Liou J G,Maruyama S,Ernst W G.Seeing a mountain in a grain ofgarnet.Science,1997,27(4):48~49
[6]Ernst W G,Maruyama S,Wallis S.Buoyancy-driven,rapidexhumation of ultrahigh-pressure metamorphosed continental crust.Proc.National Academy of Sciences,1997,94:9532~9537
[7]Hacker B R,Sharp T,Zhang R Y,et al.Determining the origin ofultra-high pressure lherzolites.Science,1997,278(10):702~704
[8]许志琴,张泽民,刘福来等.中国大陆科学钻探主孔1200米构造柱及变形构造初步解析.岩石学报,2004,20(1):53~72Xu Z Q,Zhang Z M,Liu F L,et al.The structure profile of 0-1200m in the main borehole,Chinese Continental Scientific Drillingand its preliminary deformation analysis.Acta Petrologica Sinica(inChinese),2004,20(1):53~72
[9]杨文采,胡振远,程振炎等.郯城—涟水综合地球物理剖面.地球物理学报,1999,42(2):206~217Yang W C,Hu Z Y,Cheng Z Y,et al.Long profile of geophysicalinvestigations from Tanchen to Lianshui,east-central China.ChineseJ.Geophys.(in Chinese),1999,42(2):206~217
[10]杨文采,程振炎,陈国九等.苏鲁超高压变质带北部地球物理调查(I)-深反射地震.地球物理学报,1999,42(1):16~27Yang W C,Cheng Z Y,Chen G J,et al.Geophysical investigationsof northern Sulu UHPM belt(I):Deep seismic reflection.ChineseJ.Geophys.(in Chinese),1999,42(1):16~27
[11]杨文采,方慧,程振炎等.苏鲁超高压变质带北部地球物理调查(II)-非地震方法.地球物理学报,1999,42(4):508~519Yang W C,Fang H,Cheng Z Y,et al.Geophysical investigations ofnorthern Sulu UHPM belt(II):Non-seismic methods.Chinese J.Geophys.(in Chinese),1999,42(4):508~519
[12]姜枚,王有学,宿和平.宽频地震方法技术在地震探测工作中的应用.地质学报,2003,22(7):536~539Jiang M,Wang Y X,Su H P.Wide-frequency teleseis and itsapplication to seismic exploration.Acta Geologica Sinica(inChinese),2003,22(7):536~539
[13]Kern H,Jin Z,Gao S,et al.Physical properties of UHPM rocksfrom the Sulu terrain,eastern central China:implications for theseismic structure at Donghai(CCSD)drilling site.Tectonophysics,2002,354:315~330
[14]陈意,金振民,欧新功等.韧性剪切带中片麻岩和超高压榴辉岩变形特征及其与地震波速各向异性的关系.岩石学报,2004,20(1):97~108Chen Y,Jin Z M,Ou X G,et al.Deformation features of gneiss andUHP eclogite from ductile shear zone and its relation with seismicvelocity anisotroph:Evidences from core samples at depth of 680-1200m of CCSD.Acta Petrologica Sinica(in Chinese),2004,20(1):97~108
[15]Yang W C.Crustal structure and development of Dabie UHPMTerrane in East-Central China.Continental Dynamics,1998,3(1~2):86~95
[16]Yang W C.Analysis of deep intracontinental subduction.Episodes,2000,23(1):20~24
[17]Yang W C.Geophysical profiling across the Sulu ultra-high-pressuremetamorphic belt,Eastern China.Tectonophysics,2002,354:277~288
[18]Yang W C.Flat mantle reflectors in eastern China:possible evidenceof lithospheric thinning.Tectonophysics,2003,369(3-4):219~230
[19]杨文采,杨午阳,金振民等.苏鲁超高压变质带岩石圈地震组构.中国科学,2004,34(4):307~319Yang W C,Yang W Y,Jin Z M,et al.Lithospheric seismic fabricsof Sulu ultrahigh-pressure metamorphic belt.Science in China(inChinese),2005,48(5):585~600
[20]杨文采,汪集.苏鲁地区地壳岩浆底侵的地球物理判识.地质学报,2002,76(2):173~179Yang W C,Wang J Y.Geophysical evidences for crustal magmaticunderplating in Sulu area.Acta Geologica Sinica(in Chinese),2002,76(2):173~179
[21]杨文采,李幼铭等编著.应用地震层析成像.北京:地质出版社,1993.1~233Yang W C,Li Y M.Applied Seismic Tomography.Beijing:Geological Publishing House,1993.1~233
[22]杜剑渊,杨文采.跨孔地震层析成像的级联方法.地球物理学报,1991,34(6):771~780Du J Y,Yang W C.Cascade method of cross-hole tomography.Chinese J.Geophys.(in Chinese),1991,34(6):771~780
[23]杨文采,杜剑渊.层析成像新算法及其在工程检测中的应用.地球物理学报,1994,37(2):239~245Yang W C,Du J Y.New algorithm of seismic tomography withapplication to engineering detactions.Chinese J.Geophys.(inChinese),1994,37(2):239~245
[24]杨文采.地球物理反演和地震层析成像.北京:地质出版社,1989.1~212Yang W C.Geophysical Inversion and Seismic Tomography.Beijing:Geological Publishing House,1992.1~212
[25]杨文采.地球物理反演的理论与方法.北京:地质出版社,1997.1~246Yang W C.Theory and Methods in Geophysical Inversion.Beijing:Geological Publishing House,1992.1~246
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