大型离子探针分析熔体包裹体微量元素组成
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摘要
熔体包裹体是矿物在结晶过程中捕获的岩浆小液滴,记录了岩浆起源和演化等重要信息。本研究利用CAMECA IMS 1280-HR型SIMS,建立了25个熔体包裹体微量元素的分析方法。使用O_2~-一次离子束轰击样品表面,束流4～10 nA。一次离子束在样品表面的束斑直径为20～30μm。五个地质玻璃标样(NIST612、BHVO-2G、BCR-2G、TB-1G和GSD-1G)的分析结果显示,分析精度和准确度与元素单位电流信号强度存在显著相关关系。单位电流信号强度大于12 s~(-1)的元素分析精度优于10%,单位电流信号强度小于12 s~(-1)的元素分析精度优于15%(Er和Lu的分析精度优于20%)。所有元素分析结果与推荐值的偏差小于20%。使用本方法对来自夏威夷玄武岩中的熔体包裹体进行了微量元素分析,分析结果与全岩数据有较好的一致性。另外,为方便数据处理,本研究采用MATLAB编写了SIMSTraElement程序包,可以对SIMS测试的微量元素数据进行快速便捷的处理。
Melt inclusions are small magma drops captured by mineral crystals during magmatic processes and record useful information regarding magmatic origin and evolution.Using CAMECA IMS 1280-HR secondary ion mass spectrometry(SIMS),this study established an analytical method for 25 trace elements measured in melt inclusions.O_2~-was used as the primary ion with a current of approximately 4–10 nA to bombard the sample surface.The beam ellipsoidal spot was approximately 20μm×30μm in size.The results of the five geological reference glasses(NIST612,BHVO-2G,BCR-2G,TB-1G,and GSD-1G)indicate that analytical precision and accuracy have a strong correlation with elemental concentration.The precisions for the elements with concentrations higher than 10μg/g are better than 10%(2SD),and for elements with concentrations lower than 10μg/g they are better than 15%(for Er and Lu,they are approximately 18%).The bias of all the measured elemental concentrations from their preferred values are within±20%.Using the present method,olivine-hosted melt inclusions from a Hawaiian basalt were measured.The results are consistent with the whole-rock data.Finally,a MATLAB program termed SIMSTraElement is available for public use was developed,providing fast,convenient data reduction for trace-element determination.
Melt inclusions are small magma drops captured by mineral crystals during magmatic processes and record useful information regarding magmatic origin and evolution.Using CAMECA IMS 1280-HR secondary ion mass spectrometry(SIMS),this study established an analytical method for 25 trace elements measured in melt inclusions.O_2~-was used as the primary ion with a current of approximately 4–10 nA to bombard the sample surface.The beam ellipsoidal spot was approximately 20μm×30μm in size.The results of the five geological reference glasses(NIST612,BHVO-2G,BCR-2G,TB-1G,and GSD-1G)indicate that analytical precision and accuracy have a strong correlation with elemental concentration.The precisions for the elements with concentrations higher than 10μg/g are better than 10%(2SD),and for elements with concentrations lower than 10μg/g they are better than 15%(for Er and Lu,they are approximately 18%).The bias of all the measured elemental concentrations from their preferred values are within±20%.Using the present method,olivine-hosted melt inclusions from a Hawaiian basalt were measured.The results are consistent with the whole-rock data.Finally,a MATLAB program termed SIMSTraElement is available for public use was developed,providing fast,convenient data reduction for trace-element determination.
引文
[1]Cannatelli C,Doherty A L,Esposito R,Lima A,De Vivo B.Understanding a volcano through a droplet:A melt inclusion approach[J].J Geochem Explor,2016,171:4-19.
[2]Kent A J R.Melt inclusions in basaltic and related volcanic rocks[J].Rev Miner Geochem,2008,69(1):273-331.
[3]Qian S P,Ren Z Y,Zhang L,Hong L B,Liu J Q.Chemical and Pb isotope composition of olivine-hosted melt inclusions from the Hannuoba basalts,North China Craton:Implications for petrogenesis and mantle source[J].Chem Geol,2015,401:111-125.
[4]Ren Z Y,Ingle S,Takahashi E,Hirano N,Hirata T.The chemical structure of the Hawaiian mantle plume[J].Nature,2005,436(7052):837-840.
[5]Sobolev A V,Hofmann A W,Nikogosian I K.Recycled oceanic crust observed in ghost plagioclase within the source of Mauna Loa lavas[J].Nature,2000,404(6781):986-990.
[6]Sours-Page R,Nielsen R L,Batiza R.Melt inclusions as indicators of parental magma diversity on the northern East Pacific Rise[J].Chem Geol,2002,183(1):237-261.
[7]Spilliaert N,Allard P,Métrich N,Sobolev A V.Melt inclusion record of the conditions of ascent,degassing,and extrusion of volatile-rich alkali basalt during the powerful 2002 flank eruption of Mount Etna(Italy)[J].J Geoph Res:Solid Earth,2006,111:B04203.
[8]Thomas J B,Bodnar R J,Shimizu N,Sinha A K.Determination of zircon/melt trace element partition coefficients from SIMS analysis of melt inclusions in zircon[J].Geochim Cosmochim Acta,2002,66(16):2887-2901.
[9]Hudgins T R,Mukasa S B,Simon A C,Moore G,Barifaijo E.Melt inclusion evidence for CO2-rich melts beneath the western branch of the East African Rift:Implications for long-term storage of volatiles in the deep lithospheric mantle[J].Contrib Mineral Petrol,2015,169(5):1-46.
[10]张春来,刘勇胜,高山,胡兆初,Zajacz Z,高长贵.四合屯玄武岩斑晶中单个熔体包裹体元素组成及其对岩浆演化的指示[J].地球化学,2011,40(2):109-125.Zhang Chun-lai,Liu Yong-sheng,Gao Shan,Hu Zhao-chu,Zajacz Z,Gao Chang-gui.Chemical compositions of phenocrysthosted melt inclusions from the Sihetun basalt:Implications for the magma evolution[J].Geochimica,2011,40(2):109-125(in Chinese with English abstract).
[11]Taylor R P,Jackson S E,Longerich H P,Webster J D.In situ trace-element analysis of individual silicate melt inclusions by laser ablation microprobe-inductively coupled plasma-mass spectrometry(LAM-ICP-MS)[J].Geochim Cosmochim Acta,1997,61(13):2559-2567.
[12]Halter W E,Pettke T,Heinrich C A,Rothen-Rutishauser B.Major to trace element analysis of melt inclusions by laserablation ICP-MS:Methods of quantification[J].Chem Geol,2002,183(1):63-86.
[13]Zajacz Z,Halter W.LA-ICPMS analyses of silicate melt inclusions in co-precipitated minerals:Quantification,data analysis and mineral/melt partitioning[J].Geochim Cosmochim Acta,2007,71(4):1021-1040.
[14]Sobolev A V.Melt inclusions in minerals as a source of principle petrological information[J].Petrology,1996,4(3):209-220.
[15]Shimizu N.The geochemistry of olivine-hosted melt inclusions in a famous basalt ALV519-4-1[J].Phys Earth Planet Inter,1998,107(1-3):183-201.
[16]Portnyagin M,Hoernle K,Plechov P,Mironov N,Khubunaya S.Constraints on mantle melting and composition and nature of slab components in volcanic arcs from volatiles(H2O,S,Cl,F)and trace elements in melt inclusions from the Kamchatka Arc[J].Earth Planet Sci Lett,2007,255(1):53-69.
[17]Maclennan J.Lead isotope variability in olivine-hosted melt inclusions from Iceland[J].Geochim Cosmochim Acta,2008,72(16):4159-4176.
[18]Jackson M G,Cabral R A,Rose-Koga E F,Koga K T,Price A,Hauri E H,Michael P.Ultra-depleted melts in olivine-hosted melt inclusions from the Ontong Java Plateau[J].Chem Geol,2015,414:124-137.
[19]Li Q L,Li X H,Liu Y,Wu F Y,Yang J H,Mitchell R H.Precise U-Pb and Th-Pb age determination of kimberlitic perovskites by secondary ion mass spectrometry[J].Chem Geol,2010,269(3/4):396-405.
[20]Li X H,Liu Y,Li Q L,Guo C H,Chamberlain K R.Precise determination of Phanerozoic zircon Pb/Pb age by multicollector SIMS without external standardization[J].Geochem Geoph Geos,2009,10(6):Q04010.
[21]李秋立,杨蔚,刘宇,唐国强,郝佳龙,张建超,胡森,赵旭晁,陈雅丽,储雪蕾,王英,蒋云,张爱铖,徐伟彪,林杨挺,李献华.离子探针微区分析技术及其在地球科学中的应用进展[J].矿物岩石地球化学通报,2013,32(3):310-327.Li Qiu-li,Yang Wei,Liu Yu,Tang Guo-qiang,Hao Jia-long,Zhang Jian-chao,Hu Sen,Zhao Xu-chao,Chen Ya-li,Chu Xue-lei,Wang Ying,Jiang Yun,Zhang Ai-cheng,Xu Wei-biao,Lin Yang-ting,Li Xian-hua.Ion microprobe microanalytical techniques and their applications in Earth sciencs[J].Bull Mineral Petrol Geochem,2013,32(3):310-327(in Chinese with English abstract).
[22]Guillong M,Hametner K,Reusser E,Wilson S A,Günther D.Preliminary characterisation of new glass reference materials(GSA-1G,GSC-1G,GSD-1G and GSE-1G)by laser ablationinductively coupled plasma-mass spectrometry using 193 nm,213 nm and 266 nm wavelengths[J].Geostand Geoanal Res,2005,29(3):315-331.
[23]Rocholl A,Dulski P,Raczek I.New ID-TIMS,ICP-MS and SIMS Data on the trace element composition and homogeneity of NIST certified reference material SRM 610-611[J].Geostand Newsl,2000,24(2):261-274.
[24]Elburg M,Vroon P,van der Wagt B,Tchalikian A.Sr and Pb isotopic composition of five USGS glasses(BHVO-2G,BIR-1G,BCR-2G,TB-1G,NKT-1G)[J].Chem Geol,2005,223(4):196-207.
[25]Norman M D,Pearson N J,Sharma A,Griffin W L.Quantitative analysis of trace elements in geological materials by laser ablation ICPMS:Instrumental operating conditions and calibration values of NIST glasses[J].Geostand Newsl,1996,20(2):247-261.
[26]Shimizu N,Semet M P,Allègre C J.Geochemical applications of quantitative ion-microprobe analysis[J].Geochim Cosmochim Acta,1978,42(9):1321-1334.
[27]Ren Z Y,Takahashi E,Orihashi Y,Johnson K.Petrogenesis of Tholeiitic Lavas from the Submarine Hana Ridge,Haleakala Volcano,Hawaii[J].J Petrol,2004,45(10):2067-2099.
[28]Ren Z Y,Shibata T,Yoshikawa M,Johnson K,Takahashi E.Isotope compositions of submarine Hana Ridge lavas,Haleakala volcano,Hawaii:Implications for source compositions,melting process and the structure of the Hawaiian Plume[J].JPetrol,2006,47(2):255-275.
[29]McDonough W F,Sun S-s.The composition of the Earth[J].Chem geol,1995,120(3/4):223-253.
[30]Sun S-s,McDonough W F.Chemical and isotopic systematics of oceanic basalts:Implications for mantle composition and processes[J].Geol Soc Spec Publ,1989,42(1):313-345.
[31]Green T H,Blundy J D,Adam J,Yaxley G M.SIMS determination of trace element partition coefficients between garnet,clinopyroxene and hydrous basaltic liquids at 2-7.5 GPa and1080-1200℃[J].Lithos,2000,53(3):165-187.
[32]Klemme S,Blundy J D,Wood B J.Experimental constraints on major and trace element partitioning during partial melting of eclogite[J].Geochim Cosmochim Acta,2002,66(17):3109-3123.
[2]Kent A J R.Melt inclusions in basaltic and related volcanic rocks[J].Rev Miner Geochem,2008,69(1):273-331.
[3]Qian S P,Ren Z Y,Zhang L,Hong L B,Liu J Q.Chemical and Pb isotope composition of olivine-hosted melt inclusions from the Hannuoba basalts,North China Craton:Implications for petrogenesis and mantle source[J].Chem Geol,2015,401:111-125.
[4]Ren Z Y,Ingle S,Takahashi E,Hirano N,Hirata T.The chemical structure of the Hawaiian mantle plume[J].Nature,2005,436(7052):837-840.
[5]Sobolev A V,Hofmann A W,Nikogosian I K.Recycled oceanic crust observed in ghost plagioclase within the source of Mauna Loa lavas[J].Nature,2000,404(6781):986-990.
[6]Sours-Page R,Nielsen R L,Batiza R.Melt inclusions as indicators of parental magma diversity on the northern East Pacific Rise[J].Chem Geol,2002,183(1):237-261.
[7]Spilliaert N,Allard P,Métrich N,Sobolev A V.Melt inclusion record of the conditions of ascent,degassing,and extrusion of volatile-rich alkali basalt during the powerful 2002 flank eruption of Mount Etna(Italy)[J].J Geoph Res:Solid Earth,2006,111:B04203.
[8]Thomas J B,Bodnar R J,Shimizu N,Sinha A K.Determination of zircon/melt trace element partition coefficients from SIMS analysis of melt inclusions in zircon[J].Geochim Cosmochim Acta,2002,66(16):2887-2901.
[9]Hudgins T R,Mukasa S B,Simon A C,Moore G,Barifaijo E.Melt inclusion evidence for CO2-rich melts beneath the western branch of the East African Rift:Implications for long-term storage of volatiles in the deep lithospheric mantle[J].Contrib Mineral Petrol,2015,169(5):1-46.
[10]张春来,刘勇胜,高山,胡兆初,Zajacz Z,高长贵.四合屯玄武岩斑晶中单个熔体包裹体元素组成及其对岩浆演化的指示[J].地球化学,2011,40(2):109-125.Zhang Chun-lai,Liu Yong-sheng,Gao Shan,Hu Zhao-chu,Zajacz Z,Gao Chang-gui.Chemical compositions of phenocrysthosted melt inclusions from the Sihetun basalt:Implications for the magma evolution[J].Geochimica,2011,40(2):109-125(in Chinese with English abstract).
[11]Taylor R P,Jackson S E,Longerich H P,Webster J D.In situ trace-element analysis of individual silicate melt inclusions by laser ablation microprobe-inductively coupled plasma-mass spectrometry(LAM-ICP-MS)[J].Geochim Cosmochim Acta,1997,61(13):2559-2567.
[12]Halter W E,Pettke T,Heinrich C A,Rothen-Rutishauser B.Major to trace element analysis of melt inclusions by laserablation ICP-MS:Methods of quantification[J].Chem Geol,2002,183(1):63-86.
[13]Zajacz Z,Halter W.LA-ICPMS analyses of silicate melt inclusions in co-precipitated minerals:Quantification,data analysis and mineral/melt partitioning[J].Geochim Cosmochim Acta,2007,71(4):1021-1040.
[14]Sobolev A V.Melt inclusions in minerals as a source of principle petrological information[J].Petrology,1996,4(3):209-220.
[15]Shimizu N.The geochemistry of olivine-hosted melt inclusions in a famous basalt ALV519-4-1[J].Phys Earth Planet Inter,1998,107(1-3):183-201.
[16]Portnyagin M,Hoernle K,Plechov P,Mironov N,Khubunaya S.Constraints on mantle melting and composition and nature of slab components in volcanic arcs from volatiles(H2O,S,Cl,F)and trace elements in melt inclusions from the Kamchatka Arc[J].Earth Planet Sci Lett,2007,255(1):53-69.
[17]Maclennan J.Lead isotope variability in olivine-hosted melt inclusions from Iceland[J].Geochim Cosmochim Acta,2008,72(16):4159-4176.
[18]Jackson M G,Cabral R A,Rose-Koga E F,Koga K T,Price A,Hauri E H,Michael P.Ultra-depleted melts in olivine-hosted melt inclusions from the Ontong Java Plateau[J].Chem Geol,2015,414:124-137.
[19]Li Q L,Li X H,Liu Y,Wu F Y,Yang J H,Mitchell R H.Precise U-Pb and Th-Pb age determination of kimberlitic perovskites by secondary ion mass spectrometry[J].Chem Geol,2010,269(3/4):396-405.
[20]Li X H,Liu Y,Li Q L,Guo C H,Chamberlain K R.Precise determination of Phanerozoic zircon Pb/Pb age by multicollector SIMS without external standardization[J].Geochem Geoph Geos,2009,10(6):Q04010.
[21]李秋立,杨蔚,刘宇,唐国强,郝佳龙,张建超,胡森,赵旭晁,陈雅丽,储雪蕾,王英,蒋云,张爱铖,徐伟彪,林杨挺,李献华.离子探针微区分析技术及其在地球科学中的应用进展[J].矿物岩石地球化学通报,2013,32(3):310-327.Li Qiu-li,Yang Wei,Liu Yu,Tang Guo-qiang,Hao Jia-long,Zhang Jian-chao,Hu Sen,Zhao Xu-chao,Chen Ya-li,Chu Xue-lei,Wang Ying,Jiang Yun,Zhang Ai-cheng,Xu Wei-biao,Lin Yang-ting,Li Xian-hua.Ion microprobe microanalytical techniques and their applications in Earth sciencs[J].Bull Mineral Petrol Geochem,2013,32(3):310-327(in Chinese with English abstract).
[22]Guillong M,Hametner K,Reusser E,Wilson S A,Günther D.Preliminary characterisation of new glass reference materials(GSA-1G,GSC-1G,GSD-1G and GSE-1G)by laser ablationinductively coupled plasma-mass spectrometry using 193 nm,213 nm and 266 nm wavelengths[J].Geostand Geoanal Res,2005,29(3):315-331.
[23]Rocholl A,Dulski P,Raczek I.New ID-TIMS,ICP-MS and SIMS Data on the trace element composition and homogeneity of NIST certified reference material SRM 610-611[J].Geostand Newsl,2000,24(2):261-274.
[24]Elburg M,Vroon P,van der Wagt B,Tchalikian A.Sr and Pb isotopic composition of five USGS glasses(BHVO-2G,BIR-1G,BCR-2G,TB-1G,NKT-1G)[J].Chem Geol,2005,223(4):196-207.
[25]Norman M D,Pearson N J,Sharma A,Griffin W L.Quantitative analysis of trace elements in geological materials by laser ablation ICPMS:Instrumental operating conditions and calibration values of NIST glasses[J].Geostand Newsl,1996,20(2):247-261.
[26]Shimizu N,Semet M P,Allègre C J.Geochemical applications of quantitative ion-microprobe analysis[J].Geochim Cosmochim Acta,1978,42(9):1321-1334.
[27]Ren Z Y,Takahashi E,Orihashi Y,Johnson K.Petrogenesis of Tholeiitic Lavas from the Submarine Hana Ridge,Haleakala Volcano,Hawaii[J].J Petrol,2004,45(10):2067-2099.
[28]Ren Z Y,Shibata T,Yoshikawa M,Johnson K,Takahashi E.Isotope compositions of submarine Hana Ridge lavas,Haleakala volcano,Hawaii:Implications for source compositions,melting process and the structure of the Hawaiian Plume[J].JPetrol,2006,47(2):255-275.
[29]McDonough W F,Sun S-s.The composition of the Earth[J].Chem geol,1995,120(3/4):223-253.
[30]Sun S-s,McDonough W F.Chemical and isotopic systematics of oceanic basalts:Implications for mantle composition and processes[J].Geol Soc Spec Publ,1989,42(1):313-345.
[31]Green T H,Blundy J D,Adam J,Yaxley G M.SIMS determination of trace element partition coefficients between garnet,clinopyroxene and hydrous basaltic liquids at 2-7.5 GPa and1080-1200℃[J].Lithos,2000,53(3):165-187.
[32]Klemme S,Blundy J D,Wood B J.Experimental constraints on major and trace element partitioning during partial melting of eclogite[J].Geochim Cosmochim Acta,2002,66(17):3109-3123.