青岛地区晚白垩世基性脉岩中麻粒岩捕虏体的成分特征及其温压条件
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摘要
青岛地区晚白垩世基性脉岩中含有两类麻粒岩捕虏体,富辉石麻粒岩和富长石麻粒岩。富辉石麻粒岩的主要矿物组合为Opx+Cpx+Pl,具有细粒变晶结构;富长石麻粒岩主要矿物组合为Pl+Opx+Cpx+Q或Pl+Opx/Cpx+Q,具有中粗粒粒状变晶结构。麻粒岩捕虏体中辉石的Mg~#较低(<66),普通辉石具有富Na贫Ca的特征,与岩浆底侵作用形成的麻粒岩特征接近。二辉石温度计的计算结果显示这些麻粒岩捕虏体的麻粒岩相变质平衡温度在847～910℃之间。结合富长石麻粒岩的地质压力计的计算结果(0.99～1.17GPa)和地温梯度推测出的"岩石学"Moho面深度在33～36公里之间,与"地震"Moho面深度基本一致。麻粒岩捕虏体中普通辉石的矿物成分和该地区活跃的岩浆活动暗示青岛地区下地壳麻粒岩不同于典型的古老下地壳麻粒岩地体或捕虏体。他们的形成可能是华北克拉通古老麻粒岩与岩浆底侵作用相互作用的结果。
Late Cretaceous mafic dike in Qingdao region,China contains two types of granulite xenoliths:the pyroxene-rich granulites and the plagioclase-rich granulites.The pyroxene-rich granulites are mainly composed of a mineral assemblage of Opx+Cpx +Pl and have fine-grained re-crystallized texture.The mineral assemblage for the plagioclase-rich granulites is dominantly Opx+Cpx +Pl+Q or Opx/Cpx+Pl+Q and show medium-and coarse-grained texture.All grantdites have relatively low Mg~# in pyroxenes (<66).The clinopyroxenes in these granilite xenoliths have chemical characteristics of high Na and low Ca,which is close to those for the granulites derived from magma underplating.Equilibrated temperatures calculated from the cpx-opx geothermometers are in a range of 847～911℃.Combined with the geobarometry of the plagioclase-rich granulites and the geotherm,the petrological Moho was 33～36km at depths,broadly consistent with the seismic Moho.This shows that there was no obvious crust-mantle transition zone in the Qingdao region in the Late Mesozoic.The mineralogical characteristics of these granulite xenoliths and repeated magmatism in the Jiaodong region imply that the lower crust granulites were different from those of typical Archean lower crust granulite terrain or xenoliths.Their formation could be the result of the interaction between the old lower crust of the North China craton and the underplating magma.
Late Cretaceous mafic dike in Qingdao region,China contains two types of granulite xenoliths:the pyroxene-rich granulites and the plagioclase-rich granulites.The pyroxene-rich granulites are mainly composed of a mineral assemblage of Opx+Cpx +Pl and have fine-grained re-crystallized texture.The mineral assemblage for the plagioclase-rich granulites is dominantly Opx+Cpx +Pl+Q or Opx/Cpx+Pl+Q and show medium-and coarse-grained texture.All grantdites have relatively low Mg~# in pyroxenes (<66).The clinopyroxenes in these granilite xenoliths have chemical characteristics of high Na and low Ca,which is close to those for the granulites derived from magma underplating.Equilibrated temperatures calculated from the cpx-opx geothermometers are in a range of 847～911℃.Combined with the geobarometry of the plagioclase-rich granulites and the geotherm,the petrological Moho was 33～36km at depths,broadly consistent with the seismic Moho.This shows that there was no obvious crust-mantle transition zone in the Qingdao region in the Late Mesozoic.The mineralogical characteristics of these granulite xenoliths and repeated magmatism in the Jiaodong region imply that the lower crust granulites were different from those of typical Archean lower crust granulite terrain or xenoliths.Their formation could be the result of the interaction between the old lower crust of the North China craton and the underplating magma.
引文
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Chen SH,Zhang GH,Zhou XH et al.1998.Petrological investigations on granulite xenoliths from Hannuoba basalts.Acta Petrologica Sinica,14(3):366-380(in Chinese with English abstract)
Chen SH,O'Reilly SY,Zhou XH et al.2001.Thermal and petrological structure of the lithosphere beneath Hannuoba,Sino-Korean Craton, China:Evidence from xenoliths.Lithos,56:267-301
Chen L,Zheng TY,Xu WW.2006.A thinned lithospheric image of the Tanlu Fault Zone,eastern China:Constructed from wave equation based receiver function migration.Journal of Geophysical Research, 111:1029-1044
Chi JS.1987.Research on Cenozoic basalts and upper mantle in eastern China.China University of GeosciencesPublishing House,Beijing,1 -277(in Chinese)
E ML and ZhaoDS.1987.Cenozoic basalts and their borne deep-seated xenoliths from eastern China.Scientific Press:Beijing,1-490(in Chinese)
Fan QCand Liu RX.1996.High-temperature granulite xenoliths from the Hannuoba basalts.ChineseScienceBulletin,41:235-238(in Chinese)
Fan QC and Hooper PR.1989.Mineral chemistry of ultramafic xenoliths of eastern China:Implications for the upper mantle composition and paleogeotherms.Journal ofPetrology,28:1117-1158
Fan QC,Liu RX,Li HM et al.1998.Zircon chronology and REE geochemistry of Hannuoba granulite xenoliths.Chinese ScienceBulletin,43:133-137(in Chinese)
Fan QC,Sui JL,Liu RX et al.2001.Eclogite facies garnet-pyroxenite xenoliths in Hannuoba area:New evidence of magma underplating. Acta PetrologicaSinca,17:1-6(in Chinese with English abstract)
Fan QC,Zhang HF,Sui JL.2005.Magma underplating and Hannuoba present crust-mantle transitional zone composition:xenolith petrological and geochemical evidence.Science in China(D),48 (8):1089-1105
Huang XL,Xu YG,Wang RC et al.2002.The Nushan granulite xenoliths from Anhui province,China:Mineralogical characteristics, the lower crustal geotherm and their implications for genesis.Acta Petmlogica Sinica,18(3):383-391(in Chinese with English abstract)
Huang XL,Xu YG,Liu DY et al.2003.Paleoproterozoic lower crust beneath Nushan in Anhui Province:Evidence from zircon SHRIMP U-Pb dating on granulite xenoliths in Cenozoic alkali basalt.Chinese Science Bulletin,48(13):1381-1385
Huang XL,Xu YG,Liu DY.2004.Geochronology,petrology and geochemistry of the granulite xenoliths from Nushan,east China: Implication for a heterogeneous lower crust beneath the Sino-Korean Craton.Geochimica et Cosmochimica Acta,68(1):127-149
Li ZW,Xu Y,Hao TY et al.2006.Seismic tomography and velocity structure in the crust and upper mantle around Bohai Sea area. Chinese Journal of Geophysics,49(3):797-804(in Chinesewith English abstract)
Liu DY,Nutman AP,Compston W.1992.Remnants of≥3800Ma crust in the Chinese part of the Sino-Korean craton.Geology,30:339- 342
Liu YS,Gao S.,Jin SY et al.2001.Geochemistry of lower crustal xenoliths from Neogene Hannuoba basalt,North China Craton: Implications for petrogenesis and lower crustal composition. Geochimica et Cosmochimica Acta,65(15):2589-2604
Liu YS,Gao S,Yuan HL et al.2004.U-Pb zircon ages and Nd,St,Pb isotopes of lower crustal xenoliths from North China Craton:Insights on evolution of lower continental crust.Chemical Geology,211:87 -109
McCarthy TCandDouce PA.1998.Empeircal calibration of the silica-Ca- tschermak's-anorthite(SCAn)geobarometer.Journal of Metamorphic Geology.,16:675-686
Newton RCand Perkins D.1982.Thermodynamic calibration of geobarometers based on the assemblages of garnet-plagioclase- orthopyroxene(clinopyroxene)-quartz.American Mineralogist,67: 203-222
Rietmeijir MJ.1983.Chemical distinction between igneous and metamorphic:orthopyroxenes especially those coexisting with Ca-rich clinopyroxenes:Are-evaluation.MineralogicalMagazine,47:143- 151
Shao JA,Han QJ,Zhang JQ et al.1999.Cumulate complex xenoliths in the Early Mesozoic in eastern Inner-Mongolia.Chinese Science Bulletin,44(14):1272-1279
Shao J A,Han Q J,Li HM.2000.Discovering of Mesozoic granulite xenoliths from the Sino-Korean craton.Science in China(D),30: 148-153
Wells PA.1977.Pyroxene thermometry in simple and complex systems. Contributions to Mineralogy and Petrology,62:129-139
Wilde SA.,Zhou XH,Nemchin A A.2003.Mesozoic crust-mantle interaction beneath the North China cratin:Aconsequence of the dispersal of Gondwanaland and accretion of Asia.Geology,31(9): 817-820
Wood BJand Banno S.1973.Garnet-orthopyroxene and orthopyroxene- clinopyroxene relationships in simple and complex systems. Contribution to Mineralogy and Petrology,46:1-15
Xu X,O'Reilly SY,Griffin WL et al.1998.The nature of the Cenozoic lithosphere at Nushan,eastern China.In:Flower M,Chung S L, Lo C HandLee T Y(eds)Mantle Dynamics and Plate Interactions in East Asia.Geodynamics AmermicaGeophysicalUnion,Washington D C,167-196
Ying JF,Zhang HF,Kita N et al.2006.Nature and evolution of Late Cretaceous lithospheric mantle beneath the eastern North China Craton:Constraints front petrology and geochemistry of peridotitic xenoliths from J nan,Shandong province,China.Earth and PlanetaryScienceLetters,244:622-638
Zhai MG and Fan QC.2002.Mesozoic replacement of bottom crust in North China Craton:An orogenic mantle-crust interaction.Acta Petrologica Sinica,18(1):1-8(in Chinese with English abstract)
Zhang SW,Zhang SX,Tang R Y.1988.Interpretation of the Fuliji- Fengxian DSS profile in Xiayangzi region.Acta Geophysica Sinica, 6:637-648(in Chinese with English abstract)
Zhao GC,Cawood PA,Wiled S A et al.2001.Polymetamorphism of mafic granulites in the North China Croton:Textural and thermobarometric evidence of tectonic implications.In:Miller J A, Holdsworth R E,Buick I S,Hand M(eds.),Continental Reactivation and Reworking.Geological SocietyofLondon,Special Publication,184:323-242
Zheng JP,O'Reilly SY,Griffin WL et al.1998.Nature and evolution of Cenozoic lithospherie mantle beneath Shandong peninsula,Sino- Korean craton.InternalGeololgyReview,40:471-499
Zheng JP,O'Reilly SY,Griffin WL et al.2001.Relict refractory mantle beneath the eastern North China block:Significance for lithosphere evolution.Lithos,57:43-66
Zheng JP,Sun M,Lu FX et al.2003.Mesozoic lower crustal xenoliths and their significance in lithospheric evolution beneath lhe Sino- Korean Craton.Tectonophysics,361(1-2):37-60
Zhou XM,Yu JH,Xu XS.1992.Discovery.and significance of granulite xenoliths in the Nushan basalt,East China.Chinese Science Bulletin,37:1730-1734
Zhu ZP,Zhang XK,Zhang JS et al.1997.Crust-upper mantle structureof Bejing-Huailai-Fengzhen profile and its seismological velocitystudy.Acta Seismologica Sinica,19(5):499-505
陈绍海，张国辉，周新华等．1998．汉诺坝玄武岩中麻粒岩类捕虏体的岩石学特征．岩石学报，14(3)：366-380
池际尚．1987．中国东部新生代玄武岩及上地幔研究(附金伯利岩)．中国地质大学出版社，1-277
鄂莫岚和赵大升．1987．中国东部新生代玄武岩及深源岩石包体．科学出版社，1-490
樊祺诚和刘若新．1996．汉诺坝玄武岩中高温麻粒岩捕虏体．科学通报，41(3)：235-238
樊祺诚，刘若新，李惠民等．1998．汉诺坝捕虏体麻粒岩锆石年代学与稀土地球化学．科学通报，43：133-137
樊祺诚，隋建立，刘若新等．2001．汉诺坝地区榴辉岩相石榴石辉石岩捕虏体：岩浆底侵作用新证据．岩石学报，17：1-6
黄小龙，徐义刚，王汝成等．2002．安徽女山麻粒岩包体：矿物学特征、下地壳地温曲线及其成因意义．岩石学报，18(3)：383- 391
李志伟，胥颐，郝天珧等．2006．环渤海地区的地震层析成像与地壳上地幔结构．地球物理学报，49(3)：797-804
翟明国和樊祺诚．2002．华北克拉通中生代下地壳置换：非造山过程的壳幔交换．岩石学报，18：1-8
张四维，张锁喜，唐荣余．1988．下扬子地区符离集-奉贤地震测深资料解释．地球物理学报，31(6)：637-648
祝治平，张先康，张建狮等．1997．北京-怀来-丰镇剖面地壳上地幔构造与速度结构研究．地震学报，19(5)：499-505
Chen SH,Zhang GH,Zhou XH et al.1998.Petrological investigations on granulite xenoliths from Hannuoba basalts.Acta Petrologica Sinica,14(3):366-380(in Chinese with English abstract)
Chen SH,O'Reilly SY,Zhou XH et al.2001.Thermal and petrological structure of the lithosphere beneath Hannuoba,Sino-Korean Craton, China:Evidence from xenoliths.Lithos,56:267-301
Chen L,Zheng TY,Xu WW.2006.A thinned lithospheric image of the Tanlu Fault Zone,eastern China:Constructed from wave equation based receiver function migration.Journal of Geophysical Research, 111:1029-1044
Chi JS.1987.Research on Cenozoic basalts and upper mantle in eastern China.China University of GeosciencesPublishing House,Beijing,1 -277(in Chinese)
E ML and ZhaoDS.1987.Cenozoic basalts and their borne deep-seated xenoliths from eastern China.Scientific Press:Beijing,1-490(in Chinese)
Fan QCand Liu RX.1996.High-temperature granulite xenoliths from the Hannuoba basalts.ChineseScienceBulletin,41:235-238(in Chinese)
Fan QC and Hooper PR.1989.Mineral chemistry of ultramafic xenoliths of eastern China:Implications for the upper mantle composition and paleogeotherms.Journal ofPetrology,28:1117-1158
Fan QC,Liu RX,Li HM et al.1998.Zircon chronology and REE geochemistry of Hannuoba granulite xenoliths.Chinese ScienceBulletin,43:133-137(in Chinese)
Fan QC,Sui JL,Liu RX et al.2001.Eclogite facies garnet-pyroxenite xenoliths in Hannuoba area:New evidence of magma underplating. Acta PetrologicaSinca,17:1-6(in Chinese with English abstract)
Fan QC,Zhang HF,Sui JL.2005.Magma underplating and Hannuoba present crust-mantle transitional zone composition:xenolith petrological and geochemical evidence.Science in China(D),48 (8):1089-1105
Huang XL,Xu YG,Wang RC et al.2002.The Nushan granulite xenoliths from Anhui province,China:Mineralogical characteristics, the lower crustal geotherm and their implications for genesis.Acta Petmlogica Sinica,18(3):383-391(in Chinese with English abstract)
Huang XL,Xu YG,Liu DY et al.2003.Paleoproterozoic lower crust beneath Nushan in Anhui Province:Evidence from zircon SHRIMP U-Pb dating on granulite xenoliths in Cenozoic alkali basalt.Chinese Science Bulletin,48(13):1381-1385
Huang XL,Xu YG,Liu DY.2004.Geochronology,petrology and geochemistry of the granulite xenoliths from Nushan,east China: Implication for a heterogeneous lower crust beneath the Sino-Korean Craton.Geochimica et Cosmochimica Acta,68(1):127-149
Li ZW,Xu Y,Hao TY et al.2006.Seismic tomography and velocity structure in the crust and upper mantle around Bohai Sea area. Chinese Journal of Geophysics,49(3):797-804(in Chinesewith English abstract)
Liu DY,Nutman AP,Compston W.1992.Remnants of≥3800Ma crust in the Chinese part of the Sino-Korean craton.Geology,30:339- 342
Liu YS,Gao S.,Jin SY et al.2001.Geochemistry of lower crustal xenoliths from Neogene Hannuoba basalt,North China Craton: Implications for petrogenesis and lower crustal composition. Geochimica et Cosmochimica Acta,65(15):2589-2604
Liu YS,Gao S,Yuan HL et al.2004.U-Pb zircon ages and Nd,St,Pb isotopes of lower crustal xenoliths from North China Craton:Insights on evolution of lower continental crust.Chemical Geology,211:87 -109
McCarthy TCandDouce PA.1998.Empeircal calibration of the silica-Ca- tschermak's-anorthite(SCAn)geobarometer.Journal of Metamorphic Geology.,16:675-686
Newton RCand Perkins D.1982.Thermodynamic calibration of geobarometers based on the assemblages of garnet-plagioclase- orthopyroxene(clinopyroxene)-quartz.American Mineralogist,67: 203-222
Rietmeijir MJ.1983.Chemical distinction between igneous and metamorphic:orthopyroxenes especially those coexisting with Ca-rich clinopyroxenes:Are-evaluation.MineralogicalMagazine,47:143- 151
Shao JA,Han QJ,Zhang JQ et al.1999.Cumulate complex xenoliths in the Early Mesozoic in eastern Inner-Mongolia.Chinese Science Bulletin,44(14):1272-1279
Shao J A,Han Q J,Li HM.2000.Discovering of Mesozoic granulite xenoliths from the Sino-Korean craton.Science in China(D),30: 148-153
Wells PA.1977.Pyroxene thermometry in simple and complex systems. Contributions to Mineralogy and Petrology,62:129-139
Wilde SA.,Zhou XH,Nemchin A A.2003.Mesozoic crust-mantle interaction beneath the North China cratin:Aconsequence of the dispersal of Gondwanaland and accretion of Asia.Geology,31(9): 817-820
Wood BJand Banno S.1973.Garnet-orthopyroxene and orthopyroxene- clinopyroxene relationships in simple and complex systems. Contribution to Mineralogy and Petrology,46:1-15
Xu X,O'Reilly SY,Griffin WL et al.1998.The nature of the Cenozoic lithosphere at Nushan,eastern China.In:Flower M,Chung S L, Lo C HandLee T Y(eds)Mantle Dynamics and Plate Interactions in East Asia.Geodynamics AmermicaGeophysicalUnion,Washington D C,167-196
Ying JF,Zhang HF,Kita N et al.2006.Nature and evolution of Late Cretaceous lithospheric mantle beneath the eastern North China Craton:Constraints front petrology and geochemistry of peridotitic xenoliths from J nan,Shandong province,China.Earth and PlanetaryScienceLetters,244:622-638
Zhai MG and Fan QC.2002.Mesozoic replacement of bottom crust in North China Craton:An orogenic mantle-crust interaction.Acta Petrologica Sinica,18(1):1-8(in Chinese with English abstract)
Zhang SW,Zhang SX,Tang R Y.1988.Interpretation of the Fuliji- Fengxian DSS profile in Xiayangzi region.Acta Geophysica Sinica, 6:637-648(in Chinese with English abstract)
Zhao GC,Cawood PA,Wiled S A et al.2001.Polymetamorphism of mafic granulites in the North China Croton:Textural and thermobarometric evidence of tectonic implications.In:Miller J A, Holdsworth R E,Buick I S,Hand M(eds.),Continental Reactivation and Reworking.Geological SocietyofLondon,Special Publication,184:323-242
Zheng JP,O'Reilly SY,Griffin WL et al.1998.Nature and evolution of Cenozoic lithospherie mantle beneath Shandong peninsula,Sino- Korean craton.InternalGeololgyReview,40:471-499
Zheng JP,O'Reilly SY,Griffin WL et al.2001.Relict refractory mantle beneath the eastern North China block:Significance for lithosphere evolution.Lithos,57:43-66
Zheng JP,Sun M,Lu FX et al.2003.Mesozoic lower crustal xenoliths and their significance in lithospheric evolution beneath lhe Sino- Korean Craton.Tectonophysics,361(1-2):37-60
Zhou XM,Yu JH,Xu XS.1992.Discovery.and significance of granulite xenoliths in the Nushan basalt,East China.Chinese Science Bulletin,37:1730-1734
Zhu ZP,Zhang XK,Zhang JS et al.1997.Crust-upper mantle structureof Bejing-Huailai-Fengzhen profile and its seismological velocitystudy.Acta Seismologica Sinica,19(5):499-505
陈绍海，张国辉，周新华等．1998．汉诺坝玄武岩中麻粒岩类捕虏体的岩石学特征．岩石学报，14(3)：366-380
池际尚．1987．中国东部新生代玄武岩及上地幔研究(附金伯利岩)．中国地质大学出版社，1-277
鄂莫岚和赵大升．1987．中国东部新生代玄武岩及深源岩石包体．科学出版社，1-490
樊祺诚和刘若新．1996．汉诺坝玄武岩中高温麻粒岩捕虏体．科学通报，41(3)：235-238
樊祺诚，刘若新，李惠民等．1998．汉诺坝捕虏体麻粒岩锆石年代学与稀土地球化学．科学通报，43：133-137
樊祺诚，隋建立，刘若新等．2001．汉诺坝地区榴辉岩相石榴石辉石岩捕虏体：岩浆底侵作用新证据．岩石学报，17：1-6
黄小龙，徐义刚，王汝成等．2002．安徽女山麻粒岩包体：矿物学特征、下地壳地温曲线及其成因意义．岩石学报，18(3)：383- 391
李志伟，胥颐，郝天珧等．2006．环渤海地区的地震层析成像与地壳上地幔结构．地球物理学报，49(3)：797-804
翟明国和樊祺诚．2002．华北克拉通中生代下地壳置换：非造山过程的壳幔交换．岩石学报，18：1-8
张四维，张锁喜，唐荣余．1988．下扬子地区符离集-奉贤地震测深资料解释．地球物理学报，31(6)：637-648
祝治平，张先康，张建狮等．1997．北京-怀来-丰镇剖面地壳上地幔构造与速度结构研究．地震学报，19(5)：499-505
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