中国大陆科学钻探工程主孔(734~933m)榴辉岩和片麻岩元素及Sr-Nd同位素地球化学研究

赵子福 郑永飞 陈斌 吴元保. 中国大陆科学钻探工程主孔(734~933m)榴辉岩和片麻岩元素及Sr-Nd同位素地球化学研究[J]. 岩石学报, 2005, 21(2): 325-338.
引用本文: 赵子福 郑永飞 陈斌 吴元保. 中国大陆科学钻探工程主孔(734~933m)榴辉岩和片麻岩元素及Sr-Nd同位素地球化学研究[J]. 岩石学报, 2005, 21(2): 325-338.
ZHAO ZiFu,ZHENG YongFei,CHEN Bin and WU YuanBao CAS Key Laboratory of Crust-Mantle Materials and Environments,School of Earth ami Space Sciences,University of Science and Technology of China,Hefei 230026,China. A geochemical study of element and Sr-Nd isotopes for eclogite and gneiss from CCSD core 734 to 933m[J]. Acta Petrologica Sinica, 2005, 21(2): 325-338.
Citation: ZHAO ZiFu,ZHENG YongFei,CHEN Bin and WU YuanBao CAS Key Laboratory of Crust-Mantle Materials and Environments,School of Earth ami Space Sciences,University of Science and Technology of China,Hefei 230026,China. A geochemical study of element and Sr-Nd isotopes for eclogite and gneiss from CCSD core 734 to 933m[J]. Acta Petrologica Sinica, 2005, 21(2): 325-338.

中国大陆科学钻探工程主孔(734~933m)榴辉岩和片麻岩元素及Sr-Nd同位素地球化学研究

  • 基金项目:

    国家重点基础研究发展规划项目(2003CB716501)资助

A geochemical study of element and Sr-Nd isotopes for eclogite and gneiss from CCSD core 734 to 933m

  • 对中国大陆科学钻探工程主孔两段榴辉岩与片麻岩互层的岩芯样品(Ⅰ:734.21—737.16m和Ⅱ:929.67—932.86m)分别进行了主要元素和微量元素以及Sr-Nd同位素分析。结果表明:(1)榴辉岩具有较大的成分变化范围(SiO2含量为46.8%-59.8%),表现出平坦或轻稀土(LREE)富集的分布模式和大离子亲石元素(LILE)富集或亏损以及Nb、Ta负异常特征。部分榴辉岩样品具有明显低的活动性元素(Rb、Ba和K)含量,指示了板块俯冲过程中的脱水变质效应;(2)两段岩芯中的片麻岩具有明显不同的主量和微量元素组成,其中第1段具有相对较低的SiO2含量(61.3%-66.2%)和高的重稀土(HREE)含量,而第Ⅱ段具有明显偏高的SiO2含量(73.8%-74.1%)和低的HREE含量。但两段均表现出LREE富集和Eu负异常以及LILE富集和高场强元素(Nb、Ta、Ti)负异常特征;(3)榴辉岩和第Ⅰ段岩芯中的片麻岩具有相近的且偏高的εNd(750Ma)值(-3.6- 0.5),而第Ⅱ段岩芯中的片麻岩具有明显偏低的εNd(750Ma)值(-8.7)。部分片麻岩样品表现出较高的^87Sr/^86Sr比值(0.7070)和非常低的Rb/Sr比值(0.008),指示岩石Rb—Sr同位素体系受到了变质扰动。非活动性元素如Zr、Hf、Nb、Ta、Ti、Y、REE和Ti在脱水变质过程中没有受到明显扰动,因此可用于恢复榴辉岩和片麻岩的原岩性质及其形成的大地构造背景。根据分析样品的元素和Nd同位素特点,推测榴辉岩原岩具有板内玄武岩性质,第Ⅰ段岩芯中的片麻岩原岩为玄武质岩浆上升过程中同化地壳物质形成的中性岩,而第Ⅱ段岩芯中的片麻岩原岩为地壳物质重熔形成的酸性岩。因此,深钻榴辉岩和片麻岩原岩为新元古代华南陆块北缘裂谷构造带双峰式岩浆活动的产物,在岩浆侵位过程中经历了高温大气降水热液蚀变。
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  • [1]

    刘福来.苏鲁地体超高压矿物的三维空间分布[J].地质学报,2003,77(1):69-84,T004-T006.

    [2]

    沈昆 张泽明 A.M.vandenKerkhof 肖益林 许志琴 J.Hoefs.南苏鲁超高压榴辉岩中罕见的原生高密度盐水溶液包裹体[J].科学通报,2003,48(10):1076-1081,.

    [3]

    张泽明 许志琴 刘福来 游振东 沈昆 杨经绥 李天福 陈世忠.中国大陆科学钻探工程主孔(100~2050m)榴辉岩岩石化学研究[J].岩石学报,2004,20(1):27-42,.

    [4]

    Ames L, Zhou G Z, Xiong B C. 1996. Geochronology and isotopic character of ultrahigh-pressure metamorphism with implications for collision of the Sino-Korean and Yangtze cratons, central China.Tectonics, 15: 472 -489.

    [5]

    Arculus RJ, Lapierre H, Jaillard E. 1999. Geochemical window into subduction and accretion processes, Raspas metamorphic complexm Ecuador. Geology, 27: 547 - 550.

    [6]

    Becker H, Jochum KP, Carlson RW. 2000. Trace element fractionation during dehydration of eclogites from high-pressure terranes and the implications for element fluxes in subduction zones. Chem. Geol. ,163: 65 - 99.

    [7]

    Chen B, Jahn B-m, Ye K, Liu JB. 2002. Cogenetic relationship of the Yangkou gabbro -to-granite unit, Su-Lu terrane, eastern China, and implications for UHP metamorphism. Jour. Geol. Soc. London,159: 457 -467.

    [8]

    Chen B, Zheng YF, Wu YB. 2004. A study of oxygen isotopes and hydroxyl content in minerals of UHP metamorphic rocks from CCSD core 734 to 933m. Acta Petrologica Sinica, 20(5): 1116 -1132.

    [9]

    Chopin C. 1984. Coesite and pure pyrope in high-grade blueschists of the western Alps: A first record and some consequences. Contrib.Mineral. Petrol., 86:107-118.

    [10]

    Cong BL. 1996. Ultrahigh-pressure metamorphic rocks in the DabieshanSulu Region of China Science Press, Beijing. 224 pp.

    [11]

    Culshaw N, Dostal J. 1997. Sand Bay gneiss association, Grenville Province, Ontario: a Grenvillian rift- (and -drift) assemblage stranded in the Central Gneiss Belt? Precambr. Res. , 85:97 -113.

    [12]

    Ernst WG, Liou JG. 1999. Overview of UHP metamorphism and tectonics in well-studied collisional orogens. Int. Geol. Rev. , 41: 477 -493.

    [13]

    Grauch L. 1989. Rare earth elements in metamorphic rocks. In: Lipin BR, McKay GA (Eds.), Geochemistry and Mineralogy of Rare Earth Elements. Rev. Mineral. , 21: 147 - 167.

    [14]

    Hacker BR, Ratschbacher L, Webb LE, Ireland TR, Walker D, Dong S. 1998. U/Pb zircon ages constrain the architecture of the ultrahigh-pressure Qinling-Dabie orogen, China. Earth Planet. Sci.Lett., 161:215 -230.

    [15]

    Hawkesworth CJ, Hergt JM, Ellam RM, McDermott F. 1991. Element fluxes associated with subduction related magmatism. Philos. Trans.R. Soc. London, Ser. A, 335:393 -405.

    [16]

    Huang J, Wu YB, Zheng YF, Zhao ZF. 2005. Geochemistry of elements and isotopes in igneous rocks from the Wulian region in the Sulu orogen. Acta Petrologica. Sinica, 21(3):(in press).

    [17]

    Jahn B-m. 1998. Geochemical and isotopic characteristics of UHP eclogites and ultramafic rocks of the Dabie orogen: In: Hacker BR,Liou JG. (eds.). When continents collide: Geochemistry of ultrahigh-pressure rocks. Kluwer Academic Publishing, Dordrecht,pp. 203 -239.

    [18]

    Jahn B-m, Rumble D, Liou JG. 2003. Geochemistry and isotope tracer study of UHP metamorphic rocks. In: Carswell, D. A.,Compagnoni, R. (Eds.), Ultrahigh Pressure Metamorphism. EMU Notes Mineral., vol. 5, pp. 365 -414. E tv s Univ. press,Budapest..

    [19]

    Kogiso T, Tatsumi Y, Nakano S. 1997. Trace element transport during dehydration processed in the subduction oceanic crust: 1. Experiments and implications for the origin of ocean island basalts.Earth Planet. Sci. Lett. , 148:193 -205.

    [20]

    Li SG, Chen YZ, Ge NJ, Liu DL, Zhang Z, Zhang QD, Zhao DM.1994. U-Pb zircon ages of eclogite and gneiss from the Qingdao area: evidence for the later Proterozoic magmatism in the Jiaonan Group. Chin. Sci. Bull. , 38:1773 -1777.

    [21]

    Li XH, Liu Y, Tu XL, Hu GQ, Zeng W. 2002. Precise determination of chemical compositions in silicate rocks using ICP-AES and ICP-MS:A comparative study of sample digestion techniques of alkali fusion and acid dissolution. Geochimica, 31 (3):289 - 294 ( in Chinese with English abstract).

    [22]

    Li XH, Li ZX, Ge W, Li WX, Liu Y, Wingate MTD. 2003. Neoproterozoic granitoids in South China: crustal melting above a mantle plume at ca. 825Ma? Precambr. Res. , 122:45 -83.

    [23]

    Li XP, Zheng YF, Wu YB, Chen FK, Gong B, Li YL. 2004. Low-T eclogite in the Dabie terrane of China: Petrological and isotopic constraints on fluid activity and radiometric dating. Contrib.Mineral. Petrol. , 148:443 -470.

    [24]

    Li ZX, Li XH, Kinney PD, Wang J. 1999. The breakup of Rodinia:did it start with a mantle plume beneath South China? Earth Planet. Sci.Lett. , 173:171 - 181.

    [25]

    Li ZX, LI XH, Kinny PD, Wang J, Zhang SH, Zhou H. 2003. Geochronology of Neoproterozoic syn-rift magmatism in the Yangtze craton, South China and correlations with other continents: evidence for a mantle superplume that broke up Rodinia. Precambr. Res. ,122: 85 - 109.

    [26]

    Liang XR, Wei GJ, Li XH, Liu Y. 2003. Precise measured of 143 Nd/144Nd and Sm/Nd ratios usingmultiple-collectors inductively coupled plasma-mass spectrometer (MC-ICPMS). Geochimica, 32 (1):91-96 (in Chinese with English abstract).

    [27]

    Liu Y, Liu HC, Li XH. 1996. Simultaneous and precise determination of 40 trace elements in rock samples using ICP-MS. Geochimica, 25(6): 552 -558 (in Chinese with English abstract).

    [28]

    Liu FL, Xu ZQ, Katayama I, Yang JS, Maruyama S, Liou JG. 2001. Mineral inclusions in zircons of para- and orthogneiss from pre-pilot drillhole CCSD-PP1, Chinese Continental Scientific Drilling Project.Lithos, 59: 199 -215.

    [29]

    Liu FL, Xu ZQ, Liou JG, Katayama I, Masago H, Maruyama S, Yang JS. 2002. Ultrahigh-pressure mineral inclusions in zircons of gneissic core samples of the Chinese Continental Scientific Drilling Site in eastern China. Eur. J. Mineral. , 14:499 -512.

    [30]

    Liu FL, Zhang ZM, Xu ZQ. 2003. Three-dimensional distribution of ultrahigh-pressure minerals in Sulu terrane. Acta Geologica Sinica, 77:69 -84 (in Chinese with English abstract).

    [31]

    Liu FL, Xu ZQ. 2004. Fluid inclusions hidden in coesite-bearing zircons in ultrahigh-pressure metamorphic rocks from southwestern Sulu terrane in eastern China. Chinese Sci Bull, 49:396-404.

    [32]

    Liu FL, Xu ZQ, Xue HM. 2004a. Tracing the protolith, UHP metamorphism, and exhumation ages of orthogneiss from the SW Sulu terrane (eastern China): SHRIMP U-Pb dating of mineral inclusionbearing zircons. Lithos, 78: 411 - 429.

    [33]

    Liu FL, Xu ZQ, Liou JG, Song B. 2004b. SHRIMP U-Pb ages of ultrahigh-pressure and retrograde metamorphism of gneisses, southwestern Sulu terrane, eastern China. J. Metamor. Geol. , 22:315- 326.

    [34]

    Liou JG, Zhang RY, Eide EA, Wang XM, Ernst WG, Maruyama S. 1996. Metamorphism and tectonics of high-pressure and ultra-highpressure belts in the Dabie-Sulu region, China. In: Harrison MT,Yin A. (Eds.) , the tectonics of Asia. Cambridge Univ. Press,Cambridge, pp300 - 344.

    [35]

    Liou JG. 1999. Petrotectonic summary of less-intensively studied UHP regions. Int. Geol. Rev. , 41: 571 -586.

    [36]

    Ma CQ, Ehlers C, Xu CH, Li ZC, Yang KG. 2000. The roots of the Dabieshan ultrahigh-pressure metamorphic terrane: constraints from geochemistry and Nd-Sr isotope systematics. Precambr. Res. 102:279 - 301.

    [37]

    McCulloch MT, Gamble JA. 1991. Geochemical and geodynamicconstrains on subduction zone magmatism. Earth Planet. Sci. Lett.,102: 358 - 374.

    [38]

    McDonough WF, Sun SS. 1995. The composition of the Earth. Chem.Geol. , 120:223 -253.

    [39]

    Munyanyiwa H, Hanson RE, Blenkinsop TG, Treloar PJ. 1997. Geochemistry of amphibolites and quartzofeldspathic gneisses in the Pan-African Zambezi belt, northwest Zimbabwe: evidence for bimodal magmatism in a continental rift setting. Precambr. Res. ,81:179-196.

    [40]

    Pearce JA, Cann JR. 1973. Tectonic setting of basic volcanic rocks determining using trace element analyses. Earth Planet. Sci. Lett.,19: 290 - 300.

    [41]

    Pearce JA, Norry MJ. 1979. Petrogenetic implications of Ti, Zr, Y, and Nb variations in volcanic rocks. Contrib. Mineral. Petrol. , 25: 956-983.

    [42]

    Polat A, Hofmann AW, Rosing MT. 2002. Boninite-like volcanic rocks in the 3. 7 3. 8 Ga Isua greenstone belt, West Greenland:geochemical evidence for intra-oceanic subduction zone processes in the early Earth. Chem. Geol. , 184:231 -254.

    [43]

    Shervais JW. 1982. Ti-V plots and the petrogenesis of modern ophiolitic lavas. Earth Planet. Sci. Lett., 59:101-118.

    [44]

    Smith DC. 1984. Coesite in clinopyroxene in the Caledonides and its implications for geodynamics. Nature, 310: 641 - 644.

    [45]

    Tatsumi Y, Eggins S. 1995. Subduction Zone Magmatism. Oxford:Blackwell Science, 211.

    [46]

    Volkova NI, Frenkel AE, Budanov Ⅵ, Lepezin GG. 2004. Geochemical signatures for eclogite protolith from the Maksyutov Complex, South Urals. Jour. Asian Earth Sci. , 23: 745 - 759.

    [47]

    Wallis S, Tsuboi M, Suzuki K, Fanning M, Jiang L, Tanaka T. 2005. Role of partial melting in the evolution of the Sulu (eastern China)ultrahigh-pressure terrane. Geology, 33: 129 - 132.

    [48]

    Wang QC, Zhai MG, Cong BL. 1996. Regional geology. In Cong, BL. (Ed.), Ultrahigh-Pressure Metamorphic Rocks in the DabieshanSulu Region of China. Science Press, Beijing and Kluwer Acad.Publ. , Dordrecht, pp. 8 - 26.

    [49]

    Winchester JA, Floyd PA. 1977. Geochemical discrimination of different magma series and their differentiation products using immobile elements. Chem. Geol. , 20: 325 - 343.

    [50]

    Wu YB, Zheng YF, Zhou JB. 2004. Neoproterozoic granitoid in northwest Sulu and its bearing on the North China-South China Blocks boundary in east China. Geophys. Res. Lett., 31, L07616,doi:10. 1029/2004GL019785.

    [51]

    Wu YB, Zheng YF, Gong B, Tang J, Zhao ZF, Cha XP. 2004. Zircon U-Pb ages and oxygen isotope compositions of the Luzhenguan magmatic complex in the Beihuaiyang zone. Acta Petrologica Sinica (in Chinese with English abstract), 20 (05): 1007 -1024.

    [52]

    Xu ST, Liu YC, Su W, Wang RC, Jiang LL, Wu WP. 2003. Discovery of the eclogite and its petrography in Northern Dabie Mountains.Chinese Sci. Bull. , 45:273 -278.

    [53]

    Zhang RY and Liou JG, 1997. Partial transformation of gabbro to coesitebearing eclogite from Yangkou, the Sulu terrane, eastern China. J.Metamor. Geol., 15:183-202.

    [54]

    Zhang Z, Xu Z, Xu H. 2000. Petrology of ultrahigh-pressure eclogite from the ZK703 drillhole in the Donghai, eastern China. Lithos, 52:35 - 50.

    [55]

    Zhang ZM, Xu ZQ, Liu FL, You ZD, Shen K, Yang JS, Li TF, Chen SZ. 2004. Geochemistry of eclogites from the main hole (100~2050m) of the Chinese Continental Scientific Drilling Project. Acta Petrologica Sinica, 20 (1): 27-42 (in Chinese with English abstract).

    [56]

    Zhao ZF, Zheng YF, Wei CS, Wu YB. 2004. Zircon isotope evidence for recycling of subducted continental crust in post-collisional granitoids from the Dabie terrane in China. Geophys. Res. Lett.31, L22602, doi:10. 1029/2004GL021061.

    [57]

    Zheng X, Jin C, Zhai M, Shi Y. 1999. Petrochemistry and tectonic background of the gray gneisses in north Dabie terrane. Acta Petrologica. Sinica, 15(3): 350-358.

    [58]

    Zheng YF. 1989. Influence of the nature of the initial Rb-Sr system on isochron validity. Chem. Geol,. 80: 1-16.

    [59]

    Zheng YF, Fu B, Gong B, Li L. 2003a. Stable isotope geochemistry of ultrahigh pressure metamorphic rocks from the Dabie-Sulu orogen in China: implications for geodynamics and fluid regime. Earth Sci.Rev. 62: 105 - 161.

    [60]

    Zheng YF, Gong B, Zhao ZF, Fu B, Li YL. 2003b. Two types of gneisses associated with eclogite at Shuanghe in the Dabie terrane:carbon isotope, zircon U-Pb dating and oxygen isotope. Lithos, 70:269 - 291.

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修回日期:  2005-01-28
刊出日期:  2005-03-31

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