苏北大陆科学钻探靶区岩石物理性质
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摘要
对苏北地区主要岩石物性的调查结果发现 ,科学钻探的目标体榴辉岩有很大的密度 ,与其他围岩的密度差达 0 9× 1 0 3kg/m3,具有重力勘探的物性基础 ;除角闪石化榴辉岩的弹性波速与围岩相近外 ,榴辉岩的弹性波速高于其他围岩 ,地震勘探在该区应是一种有效的勘探方法 ;就磁性而言 ,榴辉岩的磁性介于围岩磁性之间 ,与围岩磁性没有明显区别 ,但金红石矿化榴辉岩的磁性有明显差别 ,因此磁法勘探在该区受到岩石组成复杂性的限制 .
A petrophysic investigation is carried out in Maobei area, where Chinese scientific drill is located. In general, there is a prominent petrophysical difference between eclogite and its surrounding rock. Density of eclogite is higher 0.9(×10 3kg/m 3) than that of other rock, implying that gravitational exploration is most effective method used to find eclogite body as science drill target. P-wave velocity of eclogite is higher also, suggesting that seismic exploration is effective. Magnetic properties of eclogite are not largely different from wall rock, and effectiveness of magnetic exploration for locating eclogite body is limited by complex assemblage of eclogite and its surrounding rock.
A petrophysic investigation is carried out in Maobei area, where Chinese scientific drill is located. In general, there is a prominent petrophysical difference between eclogite and its surrounding rock. Density of eclogite is higher 0.9(×10 3kg/m 3) than that of other rock, implying that gravitational exploration is most effective method used to find eclogite body as science drill target. P-wave velocity of eclogite is higher also, suggesting that seismic exploration is effective. Magnetic properties of eclogite are not largely different from wall rock, and effectiveness of magnetic exploration for locating eclogite body is limited by complex assemblage of eclogite and its surrounding rock.
引文
[1] 樊金涛,程振香.苏北榴辉岩变质变形模式与苏胶造山带的隆升机制.中国区域地质,1999,18(2):162—174.FANJinTao,CHENGZhenXiang.AmodelofmetamorphismanddeformationofeclogitesinnorthernJiangsuandevolutionoftheSuJiaoorogenicbelt.RegionalGeologyofChina(inChinese),1999,18(2):162—174.
[2] 刘庆生,张泽明,刘勇胜.江苏东海地区ZK703钻孔榴辉岩的磁性结构及其深部地质意义.现代地质,1999,13(Suppl.):45—50.LIUQingSheng,ZhangZeMing,LiuYongSheng.MagneticstructuresofeclogitesfromZK703drillholeintheDonghaire gion,easternChina:implicationsfordeepgeologicalprocesses.Geosciences(inChinese),1999,13(Suppl.):45—50.
[3] 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,1999,44(4):508—519.YANGWenCai,FANGHui,CHENGZhenYan,et.al.,GeophysicalinvestigationsinnorthernSuluUHPMbelt,PartⅡ:Non seismicMethods.ChineseJ.Ceophys,1999,44(4):508—519.
[4] 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):41—42.YANGWenCai,CHENGZhenYan,CHENGuoJiu,et.al.,GeophysicalinvestigationsinnorthernSuluUHPMbelt,PartI:deepseismicreflection.ChineseJ.Geophys.1999,42(1):41—42.
[5] 杨辟元.物性工作手册.北京:地质出版社,1994.YANGPiYuan.HandbookofPetrophysicalInvestigation(inChinese).Beijing:GeologyPublishingHouse,1994.
[6] 杨晓松,金振民.大陆科学钻探中岩石物理性质研究的意义.地学前缘,1998,5(4):338—346.YANGXiaoSong,JINZhenMin.Thesignificanceofthestudiesonpetrophysicalpropertymeasurementsincontinentalscien tificdrilling.EarthScienceFrontiers(inChinses),1998,5(4):338—346.
[2] 刘庆生,张泽明,刘勇胜.江苏东海地区ZK703钻孔榴辉岩的磁性结构及其深部地质意义.现代地质,1999,13(Suppl.):45—50.LIUQingSheng,ZhangZeMing,LiuYongSheng.MagneticstructuresofeclogitesfromZK703drillholeintheDonghaire gion,easternChina:implicationsfordeepgeologicalprocesses.Geosciences(inChinese),1999,13(Suppl.):45—50.
[3] 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,1999,44(4):508—519.YANGWenCai,FANGHui,CHENGZhenYan,et.al.,GeophysicalinvestigationsinnorthernSuluUHPMbelt,PartⅡ:Non seismicMethods.ChineseJ.Ceophys,1999,44(4):508—519.
[4] 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):41—42.YANGWenCai,CHENGZhenYan,CHENGuoJiu,et.al.,GeophysicalinvestigationsinnorthernSuluUHPMbelt,PartI:deepseismicreflection.ChineseJ.Geophys.1999,42(1):41—42.
[5] 杨辟元.物性工作手册.北京:地质出版社,1994.YANGPiYuan.HandbookofPetrophysicalInvestigation(inChinese).Beijing:GeologyPublishingHouse,1994.
[6] 杨晓松,金振民.大陆科学钻探中岩石物理性质研究的意义.地学前缘,1998,5(4):338—346.YANGXiaoSong,JINZhenMin.Thesignificanceofthestudiesonpetrophysicalpropertymeasurementsincontinentalscien tificdrilling.EarthScienceFrontiers(inChinses),1998,5(4):338—346.
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