宾川苦橄岩的水含量:对峨眉山大火成岩省成因的启示
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摘要
近几年来对西伯利亚、哥伦比亚河、塔里木等大火成岩省原始岩浆水含量的分析表明,其源区的显著水化是造成地幔熔融异常的重要原因之一。峨眉山大火成岩省是全球二叠纪大火成岩省的重要组成之一,前期对其位于宾川剖面底部的大理苦橄岩水含量的分析表明地幔的水化在峨眉山大火成岩省形成中起到了重要作用。然而大理苦橄岩只能代表峨眉山大火成岩省初始阶段的熔融条件,而在其后的喷发历史中水是否也起到了关键作用还不清楚。定量分析后阶段喷发的苦橄岩水含量有助于更完整评估水在大火成岩省形成中的作用。本文报道了位于峨眉山大火成岩省西部岩带宾川剖面中上部的宾川苦橄岩的水含量,结果表明原始岩浆水含量可高达2.8 wt%,比大理苦橄岩的水含量略低,但仍显著高于MORB和OIB,达到了岛弧玄武岩的水含量范围。这表明水对整个大火成岩省的形成中都扮演了重要角色。
Large igneous provinces(LIPs) represent melting anomalies of the Earth. Recent investigations of water content of the primary magma in the global LIPs show that source hydration had played an important role in their genesis. The Emeishan LIP is one of Permian LIPs in the world. Previous work on the Dali picrites, within the initial stage of eruption, indicates that water largely promoted partial melting of mantle. However, whether water played a significant role in other stages of eruption is not clear, which is critical to understand the genesis model of LIPs. Here, we report water content of the picrites from Binchuan, within the upper part of eruption sequences of ELIP. The result shows that the primary magma could have water content as high as 2.8 wt.%, slightly lower than that of Dali picrites, but still considerably higher than that of MORB and OIB. Combined with the previous work, this study shows that mantle hydration would be essential for the whole eruption of ELIP.
Large igneous provinces(LIPs) represent melting anomalies of the Earth. Recent investigations of water content of the primary magma in the global LIPs show that source hydration had played an important role in their genesis. The Emeishan LIP is one of Permian LIPs in the world. Previous work on the Dali picrites, within the initial stage of eruption, indicates that water largely promoted partial melting of mantle. However, whether water played a significant role in other stages of eruption is not clear, which is critical to understand the genesis model of LIPs. Here, we report water content of the picrites from Binchuan, within the upper part of eruption sequences of ELIP. The result shows that the primary magma could have water content as high as 2.8 wt.%, slightly lower than that of Dali picrites, but still considerably higher than that of MORB and OIB. Combined with the previous work, this study shows that mantle hydration would be essential for the whole eruption of ELIP.
引文
郝艳丽,黄启帅,张晓冉,等.2011.云南大理苦橄岩的Re-Os同位素特征:对峨眉山大火成岩省成因的制约[J].岩石学报,27(10):2937-2946.
姜常义,钱壮志,姜寒冰,等.2007.云南宾川-永胜-丽江地区低钛玄武岩和苦橄岩的岩石成因与源区性质[J].岩石学报,23(4):777-792.
徐义刚,钟孙霖.2001.峨眉山大火成岩省:地幔柱活动的证据及其熔融条件[J].地球化学,30(1):1-9.
张招崇,王福生,郝艳丽,等.2005.峨眉山大火成岩省和西伯利亚大火成岩省地球化学物征的比较及其成因启示[J].岩石矿物学杂志,24(1):12-20.
Bell D R,Ihinger P D and Rossman G R.1995.Quantitative analysis of trace OH in garnet and pyroxenes[J].American Mineralogist,80(5-6):465-474.
Campbell I H and Griffiths R W.1990.Implications of mantle plume structure for the evolution of flood basalts[J].Earth&Planetary Science Letters,99(1):79-93.
Coltice N,Marty B and Yokochi R.2009.Xenon isotope constraints on the thermal evolution of the early Earth[J].Chemical Geology,266(1-2):4-9.
Green D H.2015.Experimental petrology of peridotites,including effects of water and carbon on melting in the Earth’s upper mantle[J].Physics&Chemistry of Minerals,42(2):95-122.
Hanski E,Kamenetsky V S,Luo Z Y,et al.2010.Primitive magmas in the Emeishan Large Igneous Province,southwestern China and northern Vietnam[J].Lithos,119(1-2):75-90.
Hanski E,Walker R J,Huhma H,et al.2004.Origin of the Permian-Triassic komatiites,northwestern Vietnam[J].Contributions to Mineralogy&Petrology,147(4):453-469.
He B,Xu Y,Xiao L,et al.2003.Generation and spatial distribution of the Emeishan large igneous province:New evidence from stratigraphic records[J].Acta Geologica Sinica-Chinese Edition,77(2):194-202.
Herzberg C and Asimow P D.2015.PRIMELT3 MEGA.XLSM software for primary magma calculation:Peridotite primary magma MgO contents from the liquidus to the solidus[J].Geochemistry Geophysics Geosystems,16(2):563-578.
Herzberg C and Gazel E.2009.Petrological evidence for secular cooling in mantle plumes[J].Nature,458(7238):619-22.
Hirschmann M M,Tenner T,Aubaud C,et al.2009.Dehydration melting of nominally anhydrous mantle:The primacy of partitioning[J].Physics of the Earth&Planetary Interiors,176(1):54-68.
Hirschmann M M.2006.Water,melting,and the deep earth H2O cycle[J].Annual Review of Earth&Planetary Sciences,34(34):54629-54653.
Hofmann A W.1986.Nb in hawaiian magmas:Constraints on source composition and evolution[J].Chemical Geology,57(1):17-30.
Liu J,Xia Q K,Deloule E,et al.2015.Recycled oceanic crust and marine sediment in the source of alkali basalts in Shandong,eastern China:Evidence from magma water content and oxygen isotopes[J].Journal of Geophysical Research Solid Earth,120(12):8281-8303.
Liu J,Xia Q K,Kuritani T,et al.2017.Mantle hydration and the role of water in the generation of large igneous provinces[J].Nature Communications,8(1):1824.
Marty B.2012.The origins and concentrations of water,carbon,nitrogen and noble gases on Earth[J].Earth&Planetary Science Letters,s 313-314(313-314):56-66.
McDonough W F and Sun S S.1995.The composition of the Earth[J].Chem.Geol.,120:223-253.
O'Leary J A,Gaetani G A and Hauri E H.2010.The effect of tetrahedral Al3+on the partitioning of water between clinopyroxene and silicate melt[J].Earth&Planetary Science Letters,297(1):111-120.
Putirka K D,Mikaelian H,Ryerson F,et al.2003.New clinopyroxene-liquid thermobarometers for mafic,evolved,and volatile-bearing lava compositions,with applications to lavas from Tibet and the Snake River Plain,Idaho[J].American Mineralogist,88(10):1542-1554.
Ren Z Y,Wu Y D,Zhang L,et al.2017.Primary magmas and mantle sources of Emeishan basalts constrained from major element,trace element and Pb isotope compositions of olivine-hosted melt inclusions[J].Geochimica et Cosmochimica Acta,208:63-85.
Rivers T and Corrigan D.2000.Convergent margin on southeastern Laurentia during the Mesoproterozoic:tectonic implications[J].Canadian Journal of Earth Sciences,37(37):359-383.
Sobolev A V,Hofmann A W,Kuzmin D V,et al.2007.The amount of recycled crust in sources of mantle-derived Melts[J].Science,316(5823):412-417.
Tang Q,Li C,Zhang M,et al.2015.U-Pb age and Hf isotopes of zircon from basaltic andesite and geochemical fingerprinting of the associated picrites in the Emeishan large igneous province,SW China[J].Mineralogy and Petrology,109(1):103-114.
Tanton L T E and Hager B H.2000.Melt intrusion as a trigger for lithospheric foundering and the eruption of the Siberian flood basalts[J].Geophysical Research Letters,27(23):3937-3940.
Wade J A,Plank T,Hauri E H,et al.2008.Prediction of magmatic water contents via measurement of H2O in clinopyroxene phenocrysts[J].Geology,36(10):799-802.
Walter M J.1998.Melting of garnet peridotite and the origin of komatiite and depleted lithosphere[J].Journal of Petrology,39(1):29-60.
Xia Q K,Liu J,Liu S C,et al.2013.High water content in Mesozoic primitive basalts of the North China Craton and implications on the destruction of cratonic mantle lithosphere[J].Earth and Planetary Science Letters,361(1):85-97.
Xiao L,Xu Y G,Mei H J,et al.2004.Distinct mantle sources of low-Ti and high-Ti basalts from the western Emeishan large igneous province,SWChina:implications for plume-sslithosphere interaction[J].Earth and Planetary Science Letters,228(3):525-546.
Xu Y,Chung S L,Jahn B M,et al.2001.Petrologic and geochemical constraints on the petrogenesis of Permian-Triassic Emeishan flood basalts in southwestern China[J].Lithos,58(3):145-168.
Zhang Z,Mahoney J J,Mao J,et al.2006.Geochemistry of picritic and associated basalt flows of the Western Emeishan Flood Basalt Province,China[J].Acta Petrologica Sinica,47(6):1997-2019.
姜常义,钱壮志,姜寒冰,等.2007.云南宾川-永胜-丽江地区低钛玄武岩和苦橄岩的岩石成因与源区性质[J].岩石学报,23(4):777-792.
徐义刚,钟孙霖.2001.峨眉山大火成岩省:地幔柱活动的证据及其熔融条件[J].地球化学,30(1):1-9.
张招崇,王福生,郝艳丽,等.2005.峨眉山大火成岩省和西伯利亚大火成岩省地球化学物征的比较及其成因启示[J].岩石矿物学杂志,24(1):12-20.
Bell D R,Ihinger P D and Rossman G R.1995.Quantitative analysis of trace OH in garnet and pyroxenes[J].American Mineralogist,80(5-6):465-474.
Campbell I H and Griffiths R W.1990.Implications of mantle plume structure for the evolution of flood basalts[J].Earth&Planetary Science Letters,99(1):79-93.
Coltice N,Marty B and Yokochi R.2009.Xenon isotope constraints on the thermal evolution of the early Earth[J].Chemical Geology,266(1-2):4-9.
Green D H.2015.Experimental petrology of peridotites,including effects of water and carbon on melting in the Earth’s upper mantle[J].Physics&Chemistry of Minerals,42(2):95-122.
Hanski E,Kamenetsky V S,Luo Z Y,et al.2010.Primitive magmas in the Emeishan Large Igneous Province,southwestern China and northern Vietnam[J].Lithos,119(1-2):75-90.
Hanski E,Walker R J,Huhma H,et al.2004.Origin of the Permian-Triassic komatiites,northwestern Vietnam[J].Contributions to Mineralogy&Petrology,147(4):453-469.
He B,Xu Y,Xiao L,et al.2003.Generation and spatial distribution of the Emeishan large igneous province:New evidence from stratigraphic records[J].Acta Geologica Sinica-Chinese Edition,77(2):194-202.
Herzberg C and Asimow P D.2015.PRIMELT3 MEGA.XLSM software for primary magma calculation:Peridotite primary magma MgO contents from the liquidus to the solidus[J].Geochemistry Geophysics Geosystems,16(2):563-578.
Herzberg C and Gazel E.2009.Petrological evidence for secular cooling in mantle plumes[J].Nature,458(7238):619-22.
Hirschmann M M,Tenner T,Aubaud C,et al.2009.Dehydration melting of nominally anhydrous mantle:The primacy of partitioning[J].Physics of the Earth&Planetary Interiors,176(1):54-68.
Hirschmann M M.2006.Water,melting,and the deep earth H2O cycle[J].Annual Review of Earth&Planetary Sciences,34(34):54629-54653.
Hofmann A W.1986.Nb in hawaiian magmas:Constraints on source composition and evolution[J].Chemical Geology,57(1):17-30.
Liu J,Xia Q K,Deloule E,et al.2015.Recycled oceanic crust and marine sediment in the source of alkali basalts in Shandong,eastern China:Evidence from magma water content and oxygen isotopes[J].Journal of Geophysical Research Solid Earth,120(12):8281-8303.
Liu J,Xia Q K,Kuritani T,et al.2017.Mantle hydration and the role of water in the generation of large igneous provinces[J].Nature Communications,8(1):1824.
Marty B.2012.The origins and concentrations of water,carbon,nitrogen and noble gases on Earth[J].Earth&Planetary Science Letters,s 313-314(313-314):56-66.
McDonough W F and Sun S S.1995.The composition of the Earth[J].Chem.Geol.,120:223-253.
O'Leary J A,Gaetani G A and Hauri E H.2010.The effect of tetrahedral Al3+on the partitioning of water between clinopyroxene and silicate melt[J].Earth&Planetary Science Letters,297(1):111-120.
Putirka K D,Mikaelian H,Ryerson F,et al.2003.New clinopyroxene-liquid thermobarometers for mafic,evolved,and volatile-bearing lava compositions,with applications to lavas from Tibet and the Snake River Plain,Idaho[J].American Mineralogist,88(10):1542-1554.
Ren Z Y,Wu Y D,Zhang L,et al.2017.Primary magmas and mantle sources of Emeishan basalts constrained from major element,trace element and Pb isotope compositions of olivine-hosted melt inclusions[J].Geochimica et Cosmochimica Acta,208:63-85.
Rivers T and Corrigan D.2000.Convergent margin on southeastern Laurentia during the Mesoproterozoic:tectonic implications[J].Canadian Journal of Earth Sciences,37(37):359-383.
Sobolev A V,Hofmann A W,Kuzmin D V,et al.2007.The amount of recycled crust in sources of mantle-derived Melts[J].Science,316(5823):412-417.
Tang Q,Li C,Zhang M,et al.2015.U-Pb age and Hf isotopes of zircon from basaltic andesite and geochemical fingerprinting of the associated picrites in the Emeishan large igneous province,SW China[J].Mineralogy and Petrology,109(1):103-114.
Tanton L T E and Hager B H.2000.Melt intrusion as a trigger for lithospheric foundering and the eruption of the Siberian flood basalts[J].Geophysical Research Letters,27(23):3937-3940.
Wade J A,Plank T,Hauri E H,et al.2008.Prediction of magmatic water contents via measurement of H2O in clinopyroxene phenocrysts[J].Geology,36(10):799-802.
Walter M J.1998.Melting of garnet peridotite and the origin of komatiite and depleted lithosphere[J].Journal of Petrology,39(1):29-60.
Xia Q K,Liu J,Liu S C,et al.2013.High water content in Mesozoic primitive basalts of the North China Craton and implications on the destruction of cratonic mantle lithosphere[J].Earth and Planetary Science Letters,361(1):85-97.
Xiao L,Xu Y G,Mei H J,et al.2004.Distinct mantle sources of low-Ti and high-Ti basalts from the western Emeishan large igneous province,SWChina:implications for plume-sslithosphere interaction[J].Earth and Planetary Science Letters,228(3):525-546.
Xu Y,Chung S L,Jahn B M,et al.2001.Petrologic and geochemical constraints on the petrogenesis of Permian-Triassic Emeishan flood basalts in southwestern China[J].Lithos,58(3):145-168.
Zhang Z,Mahoney J J,Mao J,et al.2006.Geochemistry of picritic and associated basalt flows of the Western Emeishan Flood Basalt Province,China[J].Acta Petrologica Sinica,47(6):1997-2019.