Revisiting the new classification of granitic rocks based on whole-rock Sr and Yb contents: Index
-
摘要: 2006年作者曾经按照Sr=400×10-6和Yb=2×10-6作为标志将花岗岩分为埃达克岩、喜马拉雅型花岗岩、浙闽型花岗岩和广西型花岗岩,在浙闽型中又分出南岭型(Sr-6和Yb>2×10-6),于是花岗岩被分为5类。Sr=400×10-6和Yb=2×10-6是根据阿留申群岛中的Adak岛的资料得出来的。本文统计了全球花岗岩6000多个数据(其中,埃达克型花岗岩为2810个,喜马拉雅型花岗岩636个,浙闽型花岗岩1183个,南岭型花岗岩1518个,广西型花岗岩142个,总共6289个),统计的结果,各类花岗岩的地球化学特征大致如下: (1)埃达克型花岗岩富Al2O3 和Sr,贫Y和Yb,具较高和变化的铕异常,绝大多数样品的Sr>300×10-6,Yb-6(当Sr=400×10-6~600×10-6 时Yb值最大,Sr超过600×10-6,Yb降低至-6),Al2O3 在14%~18%之间,Eu/Eu*大多在0.6~1.2范围; (2)喜马拉雅型花岗岩贫Sr和Yb,具中等的Al2O3 和变化的Eu/Eu*,Sr-6和Yb-6(少数Sr>300×10-6),Al2O3 为13%~17%,Eu/Eu*为0.2~1.0; (3)浙闽型花岗岩贫Sr富Yb,Sr在40×10-6~400×10-6之间,Yb>1.5×10-6,Al2O3 和Eu/Eu*的变化类似喜马拉雅型花岗岩,Al2O3 为12%~17%,Eu/Eu*为0.4~1.0; (4)南岭型花岗岩以很低的Sr、Al2O3 和Eu/Eu*以及很高的Yb而不同于上述各类花岗岩,通常Yb>1.5×10-6,Sr-6(Yb变化大,绝大多数>2×10-6; 当Yb在2×10-6~8×10-6时,部分样品Sr可>100×10-6,但很少>200×10-6); Al2O3 *<0.7,大多<0.4; Yb越大,Sr越低,负铕异常越明显。文中讨论了花岗岩Sr-Yb分类的意义,指出本分类适用于产于大陆和海洋的绝大多数中酸性岩浆岩(可能不适用于一部分特别富铁和钾的花岗岩,如具有高Sr和Yb特征的广西型花岗岩)。不同类型的花岗岩主要反映了源区压力的不同,而源区成分、温度、部分熔融程度、水和挥发分的加入以及岩浆混合等的影响可能是次要的。文中指出,该分类的依据、其实质,是熔体与残留相平衡的理论。与浙闽型花岗岩平衡的残留相是斜长石,与喜马拉雅型花岗岩平衡的是斜长石＋石榴石,与埃达克型花岗岩平衡的是石榴石,与南岭型花岗岩平衡的是富钙的斜长石。文中指出,加强实验岩石学研究,将年代学和地球化学研究密切结合起来是深化花岗岩研究的关键。Abstract: In our previous study, based on the values of Sr=400×10-6 and Yb=2×10-6 the granites are divided into five types; i.e., Adakite, Himalaya-type, Zhemin-type, Guangxi-type and Nanling-type granites(Sr-6 and Yb>2×10-6)separated from Zhemin-type (Zhang et al., 2006a). The values of Sr=400×10-6 and Yb=2×10-6 were originally defined according to the data of Adak Island in Aleutian Islands. In this study, A total of 6289 granite data (Adak-type granite: 2810; Himalaya-type: 636; Zhemin-type: 1183; Nanling-type: 1518; Guangxi-type: 142) are collected and the geochemical characteristics for each of the types are summarized as follows. (1) Adak-type granite is rich in Al2O3 and Sr and poor in Y and Yb with relatively high and variable Eu anomaly. Most samples have Sr>300×10-6,Yb-6(Yb is higher than 2×10-6 when Sr=400×10-6~600×10-6 and lower than 2×10-6 when Sr>600×10-6),Al2O3 14%~18% and Eu/Eu* 0.6~1.2; (2) Himalaya-type granite is poor in Sr and Yb with medium Al2O3 and variable Eu/Eu*. Sr-6, Yb-6(a few samples having Sr>300×10-6),Al2O3 13%~17% and Eu/Eu* 0.2~1.0; (3) Zhemin-type granite is rich in Yb and poor in Sr with Sr between 40×10-6 and 400×10-6 and Yb>1.5×10-6. Al2O3 and Eu/Eu* are similar to that of Himalaya-type: Al2O3 12%~17% and Eu/Eu* 0.4~1.0; (4) Nanling-type granite is different from the former three with quite low Sr, Al2O3 and Eu/Eu* and fairly high Yb. Generally, Yb>1.5×10-6,Sr-6, Al2O3 *-6. With Yb between 2×10-6 and 8×10-6, Sr content in some samples is above 100×10-6, but rarely above 200×10-6. This type is characterized by higher Yb content corresponds to lower Sr and very negative Eu anomaly. This paper discussed the siginificance of Sr-Yb classification of granitic rocks and proposed that the classification is suitable for most medium-acidic magmatic rocks forming in continents and oceans, but may not suitable for the granites with very high Fe and K such as Guangxi-type granite. The classification suggests that the variation in the formation pressure of the source rather than the influence of the source composition, temperature, degree of partial melting, water and volatile, and magma mixing. The classification is actually based on the theory of equilibrium between melt and residue phase. The residual phase is plagioclase for the Zhemin-type granite; plagioclase and garnet for the Himalaya-type granite; garnet for the adak-type granite and calcium-rich plagioclase for the Nanling-type granite. It is suggested that the key to deepen the research of granite is to strengthen experimental petrology and combine closely geochronology with geochemistry.
-
Key words:
- Granite /
- Classification /
- Sr-Yb content /
- Adak-type granite /
- Himalaya-type granite /
- Zhemin-type granite /
- Nanling-type granite /
- Pressure
-
-
[1] Aguillon-Robles A,Caimus T,Benoit M,Late Miocene adakites and Nb-enriched basalts from Vizcaino Peninsula,Mexico:Indicators of East Pacific Rise subduction below southern Baja California,Geological Society of America,2001.
[2] Ajaji T,Weis D,Giret A,Bouabdellah M,Coeval potassic and sodic calc-alkaline series in the post-collisional Hercynian Tanneherfi intrusive complex,northeastern Morocco:Geochemical,isotopic and geochronological evidence,Lithos,1998.
[3] Akcay M,Gunduz O,Porphyry Cu-Au mineralisation associated with a multi-phase intrusion,and related replacement fronts in limestones in an island are setting near the Gumuu-shane village (Artvin) in the Eastern Black Sea Province (Turkey),Chemie Der Erde-Geochemistry,2004.
[4] Altherr R,Hall A,Hegner E,Langer C and Kreuzer H,Highpotassium,calc-alkaline Ⅰ-typo plutonism in the European Variscides:Northern Vosges (France) and northern Schwarzwald (Germany),Lithos,2000.
[5] Ahhoff F,Barbey P,Boullier AM,2.8 ～ 3.0 Ga plutonism and ,deformation in the SE Amazonian craton:The Archaean granitoids of Marajoara (Caraja\'s Mineral Province,Brazil),Precambrian Research,2004.
[6] Ahunkaynak S,Genc S,Petrogenesis and time-progressive evolution of the Cenozoic continental volcanism in the Biga Peninsula,NW Anatolia (Turkey),Lithos,2008.
[7] Auwera JV,Bogaerts M,Liégeois JP,Demaiffe D,Wilmart E,Bolle O and Duchesne JC,Derivation of the 1.0 ～ 0.9 Ga ferropotassic A-type granitoids of southern Norway by extreme differentiation from basic magmas,Precambrian Research,2003.
[8] Aydogan MS,Coban H,Bozcu M,Akinci O,Geochemical and mantle-like isotopic (Nd,Sr) composition of the Baklan Granite from the Muratdagi Region (Banaz,Us_ak),western Turkey:Implications for input of juvenile magmas in the source domains of western Anatolia Eocene-Miocene granites,Journal of Asian Earth Sciences,2008.
[9] Ayres M,Harris N,REE fractionation and Nd-isotope disequilibrium during crustal anatexis:Constraints from Himalayan leucogranites,Chemical Geology,1997.
[10] Bao ZW,Zhao ZH,Geochemistry and tectonic setting of the Fugang aluminous A-type granite,Guangdong Province,China:A preliminary study,Geology and Geochemistry,2003.
[11] Barker F,Arth JG,Generation of trondhjemitic-tonalitic liquids and Archean bimodal trondhjemite-basah suites,Geology,1976.
[12] Bea F,Fershtater G,Montero P,Smirnov V and Zin\'kova E,Generation and evolution of subduction-related batholiths from the central Urals:Constraints on the P-T history of the Uralian orogen,Tectonophysics,1997.
[13] Beate B,Monzir M,Spikings R,Cotton J Silva J Bourdon E and Eissen JP,Mio-Pliocene adakite generation related to fiat subduction in southem Ecuador:The Quimsacocha volcanic center,Earth and Planetary Science Letters,2001.
[14] Bonin B,From orogenic to anorogenic settings:Evolution of granitoid suites after a major orogenesis,Geological Journal,1990.
[15] Borsi L,Schiirer U,Gaggero L,Crispini L,Age,origin and geodynamic significance of plagiogranites in lherzolites and gabbros of the Piedmont-Ligurian ocean basin,Earth and Planetary Science Letters,1996.
[16] Boulvais P,Ruffet G,Cornichet J,Mermet M,Cretaceous albitization and dequartzification of Hercynian peraluminous granite in the Salvezines Massif (French Pyrénées),Lithos,2007.
[17] Bourdon E,Eissen JP,Gutscher MA,Monzier M and Hall ML and Cotton J,Magmatic response to early aseismic ridge subduction:The Ecuadorian margin case (South America),Earth and Planetary Science Letters,2003.
[18] Bourdon E,Eissen JP,Monzier MA,Robin C Martin H Cotten J and Hall ML,Adakite-like lavas from Antisana volcano:Evidence for slab melt metasomatism beneath the Andean Northern Volcanic Zone,Journal of Petrology,2002.
[19] Boztug D,Harlavan Y,Arehart GB,Satir M and Avci N,K-Ar age,whole-rock and isotope geochemistry of A-type granitoids in the Divrigi-Sivas region,eastern-central Anatolia,Turkey,Lithos,2007.
[20] Brueseke ME,Hart WK,Intermediate composition magma production in an intracontinental setting:Unusual andesites and dacites of the Mid-Miocene Santa Rosa-Calico volcanic field,Northern Nevada,Journal of Volcanology and Geothermal Research,2009.
[21] Bryant JA,Yogodzinski GM,Hall ML,Lewicki JL and Bailey DG,Geochemical constraints on the origin of volcanic rocks from the Andean Northern Volcanic Zone,Ecuador,Journal of Petrology,2006.
[22] Cadoux A,Pinti DL,Aznar C,Chiesa S and Gillot PY,New chronological and geochemical constraints on the genesis and geological evolution of Ponza and Palmarola Volcanic Islands (Tyrrhenian Sea,Italy),Lithos,2005.
[23] Cai JH,Yan GH,Chang ZS,Wang XF Shao HX and Chu ZY,Petrological and geochemical characteristics of the Wanganzhen complex and discussion on its genesis,Acta Petrologica Sinica,2003.
[24] Cai JH,Yan GH,Mu BL,Ren KX Song B and Li FT,Zircon UPb age,Sr-Nd-Pb isotopic compositions and trace element of Fangshan complex in Beijing and their petrogenesis significance,Acta Petrologica Sinica,2005.
[25] Cai MH,Liang T,Wu DC,Huang HM,Geochemical characteristics of granites and their tectonic setting of Dachang ore field in Guangxi,Geological Science and Technology Information,2004.
[26] Cai ZY,Qiu RZ,Xiong XL,Huang GC Zhou S and Meng XJ,The adakite-like intrusive rocks characteristics of western Tibet and their prospecting significance,Geotectonica Et Metallogenia,2005.
[27] Calanchi N,Peceerillo A,Tranne CA,Lucehini F Rossi PL Kempton P Barbieri M and Wu TW,Petrology and geochemistry of volcanic rocks from the island of Panarea:Implications for mantle evolution beneath the Aeolian island are (southern Tyrrhenian sea),Journal of Volcanology and Geothermal Research,2002.
[28] Calzia JP,Ramo OT,Miocene rapakivi granites in the southern Death Valley region,California,USA,Earth-Science Reviews,2005.
[29] Castillo PR,An overview of adakite petrogenesis,Chinese Science Bulletin,2006.
[30] Castro A,Patino DAE,Corretge LG,Origin of peraluminous granites and ,granodiorites,Iberian massif (Spain):And experimental test of granite petrogenesis,Contributions to Mineralogy & Petrology,1999.
[31] Chabiron A,Alyoshin AP,Cuney M,Deloule E Golubev VN Velitchkin VI and Poty B,Geochemistry of the rhyolitic magmas from the Streltsovka caldera (Transbaikalia,Russia):A melt inclusion study,Chemical Geology,2001.
[32] Chambefort I,Moritz R,yon Quadt A,Petrology,geochemistry and U-Pb geochronology of magmatic rocks from the high-sulfidation epithermal Au-Cu Chelopech deposit,Srednogorie zone,Bulgaria,Mineral Deposits,2007.
[33] Chappell BW,White AIR,Two contrasting granite types,Pacific Geology,1974.
[34] Chappell BW,White AIR,Ⅰ-and S-type granites in the Lachlan,Fold Belt Trans R Soc Edinburgh:Earth Sci,1992.
[35] Chen B,Jahn BM,Wilde S,Xu B,Two contrasting paleozoic magmatic belts in northern Inner Mongolia,China:Petrogenesis and tectonic implications,Tectonophysics,2000.
[36] Chen B,Jahn BM,Wei CJ,Petrogenesis of Mesozoic granitoids in the Dabie UHP complex,Central China:Trace element and Nd-Sr isotope evidence,Lithos,2002.
[37] Chen B,Zhai MG,Shao JA,Petrogenesis and significance of the Mesozoic North Taihang complex:Major and trace element evidence,Science in China(Series D),2003.
[38] Chen B,Liu SW,Wang R,Chen ZC and Liu CQ,Nd-Sr isotopic geochemistry of the Late Archear-Paleoproterozoic granitoids in the Lvliang-Wutai terrain,North China craton,and implications for petrogenesis,Acta Geologica Sinica,2006.
[39] Chen FW,Fu JM,Geological and petrochemical characteristics of main Mesozoic tin-mineralized granitoids and regional metallogenetic regularities in Nanling region,Journal of Geology and Mineral Resources of North China,2005(2).
[40] Chen HW,Luo ZH,Mo XX,Liu CD and Ke S,Underplating mechanism of Triassic granite of magma mixing origin in the East Kunlun orogenic belt,Geology in China,2005.
[41] Chen PR,Zhou XM,Zhang WL,Li HM Fan CF Sun T Chen WF and Zhang M,Petrogenesis and significance of Early Yanshanian syenite-granite complex in eastern Nanling Range,Science in China(Series D),2005.
[42] Chen YX,Mesozoic volcanic rocks in western Liaoning Province and ,surrounding area:Geochronology,geochemistry and ,tectonic environment,北京:科学出版社,1997.
[43] Chen ZH,Lu SN,Li HK,Li HM Xiang ZQ Zhou HY and Song B,Constraining the role of the Qinling orogen in the assembly and break-up of Rodinia:Tectonic implications for Neoproterozoic granite occurrences,Journal of Asian Earth Sciences,2006.
[44] Cheong CS,Kwon ST,Sagong H,Geochemical and Sr-Nd-Pb isotopic investigation of Triassic granitoids and basement rocks in the northern Gyeongsang Basin,Korea:Implications for the young basement in the East Asian continental margin,The Island Are,2002.
[45] Chiaradia M,Fonthote L,Beate B,Cenozoic continental are magmatism and associated mineralization in Ecuador,Mineral Deposits,2004.
[46] Cluzel D,Bosch B,Paquette JL,Lemennicier Y Montjoie P and Menot RP,Late Oligocene post-obduction granitoids of New Caledonia:A case for reactivated subduction and slab break-off,Island Arc,2005.
[47] Cole RB,Basu AR,Nd-Sr isotopic geochemistry and tectonics of ridge subduction and Middle Cenozoic volcanism in western California,Geological Society of America Bulletin,1995.
[48] Collins WJ,Beams SD,White AIR,Chappell BW,Nature and origin of A-type granites with particular reference to southeastern Australia,Contributions to Mineralogy & Petrology,1982.
[49] Conly AG,Brenan JM,Bellon H,Scott SD,Arc to rift transitional volcanism in the Santa Rosali\'a Region,Baja California Sur,and Mexico,Journal of Volcanology and Geothermal Research,2005.
[50] Currie KL,Whalen JB,Davis WJ,Longstaffe FJ and Cousens BL,Geochemical evolution of peraluminous plutons in southern Nova Scotia,Canada:A pegmatite-poor suite,Lithos,1998.
[51] DallAgnol R,Teixeira NP,Ramo OT,Moura CAV MacambiraMJB and de Oliveira DC,Petrogenesis of the Paleoproterozoic rapakivi A-type granites of the Archean Caraja\'s metallogenic province,Brazil,Lithos,2005.
[52] De SK,Chacko T,Creaser RA,Muehlenbachs K,Geochemical and Nd-Pb-O isotope systematics of granites from the Tahson Magmatic Zone,NE Alberta:Implications for Early Proterozoic tectonics in western Laurentia,Precambrian Research,2000.
[53] Defant MJ,Drummond MS,Derivation of some modern are magmas by melting of young subduction lithosphere,Nature,1990.
[54] Defant MJ,Richerson PM,De Boer JZ,Stewart RH,Maury RC,Bellon H,Drummond MS,Feigenson MD and Jackson TE,Dacite genesis via both slab melting and differentiation:Petrogenesis of La Yeguada volcanic complex,Panama J Petrol,1991.
[55] Defant MJ,Jackson TE,Drummond MS,De Boer JZ Bellon H Feigenson MD Maury RC and Stewart RH,The geochemistry of young volcanism throughout western Panama and southeastern Costa Rica:And overview,Journal of the Geological SocietyLondon,1992.
[56] Defant MJ,Reply for comment by R.Conner on the "Evidence suggests slab melting in are magmas" by M.Defant and P.Kepezhinskas (EOS,2001,82:65,68-69),EOS,2002.
[57] Deng L,Ma RZ,Geochemical characteristics and origins of Jiabu moyite body,Tibet,Xinjiang Geology,2008.
[58] Dini A,Gianelli G,Puxeddu M,Ruggieri G,Origin and evolution of Pliocene-Pleistocene granites from the Larderello geothermal field (Tuscan Magmatic Province,Italy),Lithos,2005.
[59] Dostal J,Chatterjee AK,Origin of topaz-beating and related peraluminous granites of the Late Devonian Davis Lake pluton,Nova Scotia,Canada:Crystal versus fluid fractionation,Chemical Geology,1995.
[60] Drummond MS,Defant MJ,A model for trendhjemite-tonalitedacite genesis and crustal growth via slab melting:Archean to modern comparison,Journal of Geophysical Research,1990.
-
计量
- 文章访问数: 13744
- PDF下载数: 9668
- 施引文献: 0
下载: