新疆东准噶尔克拉麦里蛇绿岩地球化学:洋脊俯冲的产物
Geochemical characteristics of Karamaili ophiolite in east Junggar, Xingjiang: products of ridge subduction
-
摘要: 新疆东准噶尔克拉麦里蛇绿岩中的镁铁质岩兼具有洋中脊玄武岩(MORB)和岛弧拉斑玄武岩(IAB)的特征,岩石地球化学特征表现为轻稀土(LREE)亏损、平坦或略微富集,不同程度地亏损高场强元素(HFSE)而富集大离子亲石元素(LILE),成分上非常相似于受洋脊俯冲影响的Chile Ridse和Cocos Ridse玄武岩。可以认为其可能形成于受洋脊俯冲影响的岛弧或弧前扩张环境。相对较高的εNd(t)(7.2—9.8)、低Nb/Zr、Ta/Yb比值,说明在洋脊俯冲的影响下,其源区可能存在有至少三种组分:弧下地幔、来自消减板片流体和俯冲沉积物、MORB地幔。
-
Key words:
- Junggar /
- Karamaili /
- Ophiolite /
- Ridge subduction /
- Arc island
-
[1] Abratis M and Worner G.2001. Ridge collision,slab-window formation,and the flux of Pacific asthenosphere into the Caribbean realm.Geology,29:127-130
[2] Abratis M.1998. Geochemical variations in magmatic rocks from southern Costa Rica as a consequence of Cocos Ridge subduction and uplift of the Cordillera de Talamanca[Ph.D.thesis]:Gottingen,Germany,Universitat Gottingen,148p
[3] Bradley DC,Kusky TM,Haeussler PJ et al.2003. Geologic signature of early Tertiary ridge subduction in Alaska.Geological Society of America Special Paper,371 (1):1-31
[4] Bortolotti V,Marroni M,Pandolfi L,Principi G and Saccani E.2002. Interaction between mid-ocean ridge and subduction magmatism in Albanian ophiolites.The Journal of Geology,110:561-576
[5] Bourgois J,Martin H,Lagahrielle Y,Le Moigne J and Frutos Jara J.1996. Subduction erosion related to spreading-ridge subduction:Taitao Peninsula (Chile margin triple junction area).Geology,24(8):723-726
[6] Coleman RG.1984. The diversity of ophiolites.Geol.Mijnbouw,63:141-150
[7] Condie KC.2003. Incompatible element ratios in oceanic basalts and komatiites:Tracking deep mantle sources and continental growth rates with time.Geochemistry Geophysics Geosystems,4(1),1005,doi:10.1029/2002GC000333
[8] Dickinson WR and Snyder WS.1979. Geometry of subducted slabs related to San Andeas transform.Journal of Geology,87:609-627
[9] Encarnacion J,Mukasa SB and Evans CA.1999. Subduction components and generation of arc-like melts in the Zambales ophiolite,Philippines:Pb,Sr and Nd isotopic constrains.Chemical Geology,156:343-357
[10] Gribble RF,Stern RJ,Bloomer SH,Stuben D,O\'Hearn T and Newman S.1996. MORB mantle and subduction components interact to generate basalts in the southern Mariana Trough back-arc basin.Geochim.Cosmochim.Acta,60:2153-2166
[11] Gribble RF,Stem RJ,Newman S,Bloomer SH and O\'Hearn T.1998. Chemical and isotopic composition of lavas from the Northern Mariana Trough:Implications for magmagenesis in back-arc-arc basins.Journal of Petrology,39:125-154
[12] Hawkesworth CJ,O\'Nions RK and Arculus RJ.1979. Nb and Sr isotope geochemistry of island arc volcanics,Grenada,Lesser Antilles.Earth and Planetary Science Letters,45:237 -248
[13] He GQ,Li MS,Jia JD and Zhou H.2001. A discussion on age and tectonic significance of ophiolite in eastern Junggar,Xinjiang.Acta Scientiarum Naturalium,37 (6):852 -858 (in Chinese with English abstract)
[14] Helo G,Hegner E,Kroner A,Badarch G,Tomurtogoo O,Windley BF and Dulski P.2006. Geochemical signature of paleozoic accretionary complexes of the Central Asian Orogenic Belt in South Mongolia:Constraints on arc environments and crustal growth.Chemical geology,227:236-257
[15] Ionov DA and Hofmann AW.1995. Nb-Ta-rich mantle amphiboles and micas:Implications for subduction-related metasomatic trace element fractionations.Earth and Planetary Science Letters,131 (3):341-356
[16] Johnson CM and O\'Neil JR.1984. Triple junction magmatism:A geochemical study of Neogene volcanic rocks in western California.Earth and Planetary Science Letters,71:241 -262
[17] Johnson MC and Plank T.1999. Dehydration and melting experiments constrain the fate of subducted sediments.Geochemistry Geophysics Geosystems,1.doi:10.1029/1999GC000014
[18] Karsten JL,Klein EM and Sherman SB.1996. Subduction zone geochemical characteristics in ocean ridge basalts from the southern Chile Ridge:Implications of modem ridge subduction systems for the Archean.Lithos,37:143-161
[19] Kelemen PB,Hanghφj K and Greene AR.2003. One view of the geochemistry of subduction-related magmatic arcs,with an emphasis on primitive andesite and lower crust.Treatise on Geochemistry,Elsevier,3:593 -659
[20] Klein EM and Karsten JL.1995. Ocean-ridge basahs with convergent margin geochemical affinities from the Chile Ridge.Nature,374:52-57
[21] Lagabrielle Y,Le Moigne J,Maury RC,Cotten J and Bourgois J.1994. Volcanic record of the subduction of an active spreading ridge,Taitao Peninsula (southern Chile).Geology,22(6):515-518
[22] Le Bas MJ,Le Maitre RW,Streckeisen A and Zanettin B.1986. A chemical classification of volcanic rocks based on the total alkalisilica diagram.Journal of Petrology,27:745-750
[23] Liang XR,Wei GJ,Li XH and Liu Y.2003. Precise determination of 143Nd/144Nd and Sm/Nd ratios using multiple-collector inductively coupled plasmamass spectrometer (MC-ICPMS):Geochimica,v.32,p.91 -96 (in Chinese with English abstract)
[24] Li JY,Xiao WJ,Wang KZ,Sun GH and Gao LG.2003. NeoproterozoicPaleozoic tectonostratigraphy,magmatic activities and tectonic evolution of eastern Xinjiang,NW China.In:Mao JW,Goldfarb RJ,Seltman R,Wang DH,Xiao WJ and Hart C(eds).Tectonic evolution and metallogeny of the Chinese Altay and Tianshan:IAGOD Guidebook Series 10. CERCAM/NHM,London,31-74
[25] Li JY.2004. Late Proterozoic and Paleozoic tectonic framework and evolution of Eastern Xinjiang,NW China.Geological Review 50,304-322 (in Chinese with English abstract)
[26] Lytwyn J,Casey J,Gilbert S and Kusky T.1997. Arc-like mid-ocean ridge basalt formed seaward of a trench-forearc system just prior to ridge subduction:An example from subaccreted ophiolites in southern Alaska.Journal of Geophysical Research,102:10225-10243
[27] Lytwyn J,Lockhart S,Casey J and Kusky T.2000. Geochemistry of near-trench intrusives associated with ridge subduction,Seldovia Quadrangle,southern Alaska.Journal of Geophysical Research,.105:27957-27978
[28] Meschede M.1986. A method of discriminating between different types of mid-ocean ridge basalts and continental tholeiites with the Nb-Zr-Y diagram.Chemical Geology,56,207-218
[29] Pearce JA and Cann JR.1973. Tectonic setting of basic volcanic rocks determined using trace element analyses.Earth and Planetary Science Letters 19,290-300
[30] Pearce JA.1983. Role of the sub-continentsl lithosphere in magma genesis at active continental margins.In Continental basalts and mantle xenoliths (ed.Hawkesworth and Norry),pp.230-272. Shiva
[31] Pearce JA,Lippard SJ and Roberts S.1984. Characteristics and tectonic significance of supra-subduction zone ophiolites.In:Kokelaar BP and Howells MF (eds).Marginal Basin Geology.Geological Society London,Blackwell,77-94
[32] Pearce JA and Peate DW.1995. Tectonic implications of the composition of volcanic arc magmas.Annual Review of Earth and Planetary Sciences,23,251 -285
[33] Robinson PT,Zhou MF,Hu XF,Reynolds P,Bai WJ and Yang JS.1999. Geochemical constraints on the petrogenesis and tectonic setting of the Hegenshan ophiolite,Northern China.Journal of Asian Earth Sciences,17:423-442
[34] Shervais JW.1982. Ti-V plots and the petrogenesis of roodern and ophiolitic lavas.Earth and Planetary Science Letters,59:101-118
[35] Shervais JW.2001. Birth,Death and Resurrection:The Life cycle of supra-subduction zone ophiolites.Geochemistry Geophysics Geosystems,2 (1),doi:10.1029/2000GC000080
[36] Shu LS and Wang YJ.2003. Late Devonian-Early carboniferous radiolarian fossils from siliceous rocks of the Kelameili ophiolite,Xinjiang.Geological Review,49(4):408-412(in Chinese with English abstract)
[37] Sisson VB,Pavlis TL,Roeske SM and Thorkelson DJ.2003. Introduction:An overview of ridge-trench interactions in modern and ancient settings.In:Sisson VB,Roeske SM and Pavlis TL(eds).Geology of a Transpressional Orogen developed during Ridge-Trench Interaction along the North Pacific Margin.Geological Society of America,Special Papers,371:1-18
[38] Sisson VB and Pavlis TL.1993 Geologic consequences of plate reorganization; an example from the Eocene Southern Alaska fore arc.Geology,21(10):913 -916
[39] Stern RJ,Morris J,Bloomer SH and Hawkins JW.1991. The source of the subduction component in convergent margin magmas:Trace element and radiogenic isotope evidence from Eocene boninites,Mariana forearc.Geochim Cosmochim Acta,55:1467-1481
[40] Sun SS and McDonough WF.1989. Chemical and isotopic systematics of oceanic basalts:Implications for mantle composition and processes.In:Saunders AD and Norry MJ (eds).Magmatism In Ocean Basins.Geological Society London Special Publication,42:313-345
[41] Thorkelson DJ.1996. Subduction of diverging plates and the principles of slab window formation.Tectonophysics,255:47-63
[42] Turner S,Hawkesworth C,Van CP,Heath E,Macdonald R and Black S.1996. U-series isotopes and destructive plate margin magma genesis in the Lesser Antilles.Earth and Planetary Science Letters,142(1-2):191-207
[43] Wilson M.1989. Igneous petrogenesis.London:Unwin Hyman.
[44] Wang ZH,Sun S,Li JL,Hou QL,Qin KZ and Xiao WJ.2003. Paleozoic tectonic evolution of the northern Xinjiang,China:Geochemical and geochronological constrains from the ophiolites.Tectonics,22(2):1014,doi:10.1029/2002TC001396
[45] Winchester JA and Floyd PA.1977. Geochemical discrimination of different magma series and their diferentiation products using immobile elements.Chemical Geology,20:325-343
[46] Windley BF,Alexeiev D,Xiao WJ,Kroner A and Badarch G.2007. Tectonic models for accretion of the Central Asian Orogenic Belt.Journal of the Geologieal Society,London,164:31-47
[47] Wood DA.1980. The application of a Th-Hf-Ta diagram to problems of tectOnOmagmatic classification and to estsblishing the nature of crustal contamination of basaltic lavas of the British Tertiary volcanic province.Earth and Planetary Science Letters.50:11-30
[48] Xiao W,Windley BF,Badarch G,Sun S,Li J,Qin K and Wang Z.2004a.Palaeozoic accretionary and convergent tectonics of the southern Altaids:Implications for the growth of Central Asia.Journal of the Geological Society,London,161:339-342
[49] Xiao W,Zhang LC,Qin KZ,Sun S and Li JL.2004b.Paleozoic accretionary and collisional tectonics of the eastern Tienshan (China):Implications for the continental growth of Central Asia.American Journal of Science,304:370-395
[50] Xiao WJ,Han CM,Yuan C,Chen HL,Sun M,Lin SF,Li ZL,Mao QG,Zhang JE,Sun S and Li JL.2006. Unique Carboniferous-Permian tectonic-metallogenic framework of Northern Xinjiang (NW China):Constraints for the tectonics of the southern Paleoasian Domain.Acta Petrologica Sinica,(22)5:1062-1076 (in Chinese with English abstract)
[51] Xu JF,Castillo PR,Chen FR,Niu HC,Yu XY and Zhen ZP.2003. Geochemistry of late Paleozoic mafic igneous rocks from the Kuerti area,Xinjiang,northwest China:Implications for back-arc mantle evolution.Chemical Geology,193:137-154
[52] Xu JF,Chen FR,Yu XY,Niu HC and Zheng ZP.200la.Kuerti ophiolite in Altay area of north Xinjiang:Magmatism of an ancient back arc basin.Acta Petrologica et Mineralogica,20(3):344-352(in Chinese with English abstract)
[53] Xu JF,Mei HJ,Yu XY,Bai ZH,Niu HC,Chen FR,Zhen ZP and Wang Q.2001b.Adakites related to subduetion in the northern margin of Junggar arc for the Late Paleozoic:Products of slab melting.Chinese Science Bulletin,46:684-988 (in Chinese)
[54] Yumul GP.1996. Varying mantle sources for the supra-subduction zone ophiolites:REE evidence from the Zambales Ophiolite Complex,Luzon,Philippines.Tectonophysics,262:243-262
[55] Zhao ZH,Wang Q,Xiong XL,Zhang HX,Niu HC,Xu JF,Bai ZH and Qiao YL.2006. Two types of adakites in north Xinjiang,China.Acta Petrologica Sinica,22 (5):1249-1265 (in Chinese with English abstract)
[56] Zhang C and Huang X.1992. The age and tectonic settings of ophiolite in west Junggar,Xingjiang.Geological Review,38:509-524 (in Chinese with English abstract)
[57] Zhang HX,Niu HC,Yu XY et al.2003. The geochemical characteristics of boninites and its tectonic significance in Shaerbu-lake,Fuyun County,north Xinjiang.Geochimica,32:155-160 (in Chinese with English abstract)
[58] Zhang HX,Niu HC,Sato H,Shah Q,Yu XY,Ho J and Zhang Q.2004. Late Palcozoic adakite and Nb-enriched basalt from northern Xinjiang:Evidence for the southward subduction of the Palm-Asian Ocean.Geological Journal of China University,10:106-113 (in Chinese with English abstract)
[59] Zhang Q.1990. A preliminary study on the geochemistry and origin of boninites and boni-basalts.Geochimica,3:207-215 (in Chinese with English abstract)
[60] Zhang Q,Zhou GQ and Wang Y.2003. The distribution of time and space of chinese ophiolites 1 and their tectonic settings.Acta Petrologica Sinica,19 (1):1-8 (in Chinese with English abstract)
计量
- 文章访问数: 8515
- PDF下载数: 9464
- 施引文献: 0