河北平泉光头山碱性花岗岩的时代、Nd-Sr同位素特征及其对华北早中生代壳幔相互作用的意义
Age and Nd-Sr isotopic geochemistry of the Guangtoushan alkaline granite, Hebei province, China: implications for early Mesozoic crust-mantle interaction in North China Block
-
摘要: 光头山碱性花岗岩产出在华北北部的前寒武纪基底变质岩系之中,造岩矿物组合为石英 碱性长石 纳铁闪石 霓辉石 钠铁非石±星叶石,副矿物有锆石、钛铁矿、硅钛铈铁矿等。晚期的伟晶岩囊状体由颗粒粗大的石英、碱性长石和纳铁闪石等组成,全岩Rb-Sr等时线年龄为T=200±16Ma,(~(87)Sr/~(86)Sr)_i=0.705±0.008,MSWD=11.2,代表冷却年龄,单颗粒锆石U-Pb谐和年龄为220±1Ma,代表岩体侵位时代。光头山碱性花岗岩以A/CNK<1和A/NK<1,Al_2O_3、MgO、CaO和Ba、Sr含量低,全碱含量、MnO和Rb、Ga等含量高,负Eu异常特别显著等为特征。矿物学和地球化学完全符合A型花岗岩的特征。光头山碱性花岗岩是华北地区早中生代后造山环境下岩浆活动的产物。光头山碱性花岗岩的ε_(Nd)(T=220Ma)平均值为-8.9,明显高于华北前寒武纪下地壳岩石的范围,而冀北地区前寒武纪高压麻粒岩地体虽具有大陆地幔的特征,但未经历过部分重熔,表明至少前寒武纪下地壳不可能是岩浆主要的或唯一的来源同样,现今华北下地壳由于时代较新,也不可能成为岩浆的源岩,对比时代相近的超镁铁岩和煌斑岩的Nd同位素特征,推测最可能的源区是1.8～1.9Ga形成的富集的岩石圈地幔。光头山碱性花岗岩和华北北缘早中生代侵入岩带规模很大,以富集地慢来源的岩浆为主,反映了当时的岩浆活动已经具有相当的规模和强度,如果130Ma前后中国东部大规模岩浆活动之时,是岩石圈减薄已经达到最大程度之际,那么,此前一定时间段内的幔源岩浆活动都有可能与岩石圈减薄从开始到鼎盛的过程有关,所以,华北北缘早中生代岩浆活动可能是华北中生代岩石圈减薄过程早期阶段的产物。与岩石圈减薄过程有关的早中生代岩浆活动还在中国东北地区东部和阿拉善北部形成了后造山A型花岗岩。与岩石圈减薄过程相关的早中生代侵入岩在一定范围内的带状分布,表明当时岩石圈减薄过程可能并没有涉及到整个中国东部地区只有到了侏罗纪-白垩纪,岩石圈减薄过程才在更大的区域内广泛发生。所以说,中国东部中新生代岩石圈减薄过程是在时间上从早中生代就已经开始、在空间上从华北北缘-中国东北地区东部开始向外逐渐扩展的一个深部过程。这个深部过程对应的地表表现是,先在华北北缘和中国东北东部地区形成规模很大的早中生代侵入岩带。而后,当岩石圈减薄过程扩展到整个中国东部时,岩浆活动才达到鼎盛时期,这可能就是中国东部侏罗纪-白垩纪大规模岩浆活动的深部原因所在。而以富集地幔源区为主的岩浆活动还导致了华北北缘地壳垂向生长。
-
Key words:
- Zircon U-Pb age /
- Isotopic geochemistry A-type granite /
- Crust-mantle interaction /
- Mesozoic /
- North China /
-
-
[1] ［1］Anderson JL, Morrison J. 1992. The role of anorogenic granites in the Proterozoic crustal development of North America. In: Condie KC (ed.). Proterozoic Crustal Evolution. Amsterdam: Elsevier, 263 -299
[2] ［2］Bonin B, Grelou-Orsini C, Vialette Y. 1978. Age, origin and evolution of the anorogenic complex of Evisa (Corsica): A K-Li-Rb-Sr study.Contributions to Mineralogy and Petrology, 65:425 -432
[3] ［3］Brown GC, Thorpe RS, Webb PC. 1984. The geochemical characteristics of granitoids in contrasting arcs and comments on magna sources.Journal of the Geological Society, London, 141:413 -426
[4] ［4］Bureau of Geological and Mineral Resources of Hebei Province. 1989. Regional Geology of Hebei Province, Beijing Municipality and Tianjin Municipality. Beijing: Geological Publishing House, 1 -741( in Chinese with English abstract)
[5] ［5］Chen JF, Foland KA, Liu YM. 1993. Precise 40Ar-39Ar dating of the Suzhou composite granite. Acta Petrologica Sinica, 9:77 -85 (in Chinese with English abstract)
[6] ［6］Collins WJ, Beams SD, White AJR, Chappell BW. 1982. Nature and origin of A-type granites with particular reference to southeastern Australia. Contributions to Mineralogy and Petrology, 80:189 -200
[7] ［7］Creaser RA, Price RC, Wormald RJ. 1991. A-type granites revisited:Assessment of a residual-source model. Geology, 19: 163 - 166
[8] ［8］DePaolo DJ, Daley EE. 2000. Neodymium isotopes of the southwest basin and range and lithospheric thining during continental extension.Chemical Geology, 169: 157-195
[9] ［9］DePaolo DJ, Wasserburg GJ. 1976. Inferences about magma sources and mantle structure from variations of 143Nd/144 Nd. Geophysical Research Letters, 3: 743 - 746
[10] ［10］Dickin AP, Halliday AN, Bowden P. 1991. APb, Sr and Nd isotope study of the basement and Mesozoic ring complexes of the Jos Plateau, Nigeria. Chemical Geology, 94: 23 - 32
[11] ［11］Dobbs PN, Duncan DJ, Hu S, Dhee SR, Brown MA, Smith CB, Allsopp HL. 1994. The Geology of the Mengyin kimberlites, Shangdong,China. In: Meyer HOA. Leonardos OH. ( eds. ). Kimberlites,Related Rocks and Mantle Xenoliths, Proceedings of the 5th international kimberlite Conference, 1: Brasilia, Companhia de Pesquisa Recursos Minerais, 40 - 61
[12] ［12］Eby EN. 1992. Chemical subdivision of the A-type granitoids:Petrogenetic and tectonic implications. Geology, 20: 641 - 644
[13] ［13］Fan QC, Sui JL, Liu RX, Zhou XH. 2001. Eclogite facies garnetpyroxenolite xenolith in Hannuoba area: New evidence of magma underplating. Acta Petrologica Sinica, 17 ( 1 ): 1 - 6 ( in Chinese with English abstract)
[14] ［14］Fan QC,. Liu RC, Li HM, Li N, Sui JL, Lin ZR. 1998. Zircon chronology and REE geochemistry of granulite xenolith at Hannuoba.China Science Bulletin, 43 (18): 1510 - 1515
[15] ［15］Fan QC, Sui JL, Liu RX, Zhou XH. 2001. Eclogite facies garnetpyroxenolite xenolith in Hannuoba area: New evidence of magma underplating, Acta Petrologiea Sinica, 17 ( 1 ): 1 - 6 ( in Chinese with English abstract)
[16] ［16］Foland KA, Allen JC. 1991. Magma sources for Mesozoic anorogenic granites of the White Mountain magma series, New England, USA.Contributions to Mineralogy and Petrology, 109:195 -211
[17] ［17］Foland KA, Chen JF, Gilbert LA. 1988. Nd and Sr isotopic signatures of Mesozoic plutons in northeastern North America. Geology, 16:684- 687
[18] ［18］Gao S, Luo TC, Zhang BR, Zhang HF, Han YW, Zhao ZD, Hu YK.1998. Chemical composition of the continental crust as revealed by studies in east China. Geochimica et Cosmochimica Acta, 62:1959- 1975
[19] ［19］Gao S, Rudnick RL, Carlson RW, McDonough WF, Liu YS. 2002. Re Os evidence for replacement of ancient mantle lithosphere beneath the North China craton. Earth and Planetary Science Letters, 198:307- 322
[20] ［20］Green TH. 1994. Experimental studies of trace-element partitioning applicable to igneous petrogenesis ( Sedona 16 years later. Chemical Geology, 117: 1-36
[21] ［21］Griffin WL, Zhang AD, O \'Reilly SY, Ryan CG. 1998. Phanerozoic evolution of the lithosphere beneath the Sino-Korean Craton. In:Flower M, Chung SL, Lo CH, et al. eds. Mantle Dynamics and Plate Interactions in East Asia. American Geophysical Union,Geodynamics Series, 27: 107 ～ 126
[22] ［22］Guan H, Sun M, Wilde SA, Zhou XH, Zhai MG. 2002. SHRIMP U Pb zircon geochronology of the Fuping Complex: implications for formation and assembly of the North China Craton. Precambrian Research, 113:1-18
[23] ［23］Han BF, He GQ, Wang SG, Hong DW. 1998. Postcollisional mantlederived magmatism and vertical growth of the continental crust in North Xinjiang. Geological Review, 44(4): 397 -406 (in Chinese with English abstract)
[24] ［24］Han BF, Wang SG, Hong DW. 1993. Age of Guangtoushan alkali granite, Pingquan, Hebei Province, China. Scientia Geologica Sinica, 28(2): 183 -184 (in Chinese with English abstract)
[25] ［25］Han BF, Wang SG, Jahn BM, Hong DW, Kagami H, Sun YL. 1997. Depleted-mantle source for the Ulungnr River A-type granites from North Xinjiang, China: geochemistry and Nd Sr isotopic evidence,and implications for Phanerozoic crustal growth. Chemical Geology,138: 135 - 159
[26] ［26］Han BF, Wang SG, Wang PY, Lai Y, Li XF, Hong DW. 1994. Aenignatite from Guangtoushan alkali granite, Pingquan, Hebei Province, China. Scientia Geologica Sinica, 29(2): 159 - 164 (in Chinese with English abstract)
[27] ［27］Jahn BM, Griffin WL, Windley BF. 2000b. Continental growth in the Phanerozoic: evidence from Central Asia Special issue.Tectonophysics, 328: 1 227
[28] ［28］Jahn BM, Wu FY, Capdevila R, Martineau F, Zhao Z, Wang Y. 2001. Highly evolved juvenile granites with tetrad REE patterns: the Woduhe and Baerzhe granites from the Great Xing \'an Mountains in NE China. Lithos, 59:171 - 198
[29] ［29］Jahn BM, Wu FY, Chen B. 2000a. Granitoids of the Central Asian Orogenic Belt and continental growth in the Phanerozoic. Transaction of the Royal Society of Edinburgh: Earth Sciences, 91: 181 - 193
[30] ［30］Jahn BM, Wu FY, Lo CH, Tsai CH. 1999. Crust mantle interaction induced by deep subduction of the continental crust: geochemical and Sr Nd isotopic evidence from post-collisional mafic ultramafic intrusions ofthe northern Dabie complex, central China. Chemical Geology, 157: 119 - 146
[31] ［31］Kagami H, Iwata M, Sano S, Honma S. 1987. Sr and Nd isotopic compositions and Rb, Sr, Sm and Nd concetrations of standard samples. Technical Report of ISEI, Okayama University, Series B,No. 4, 1-16
[32] ［32］Kagami H, Yokose H, Honma H. 1989. 87Sr/86 Sr and 143Nd/144 Nd ratios of GSJ rock reference samples: JB-la, JA-1 and JG-1a.Geochemical. Journal, 23:209-214
[33] ［33］Kerr A, Fryer BJ. 1993. Nd isotope evidence for crust-mantle interaction in the generation of A-type granitoid suites in Labrador, Canada.Chemical Geology, 104:39 -60
[34] ［34］Li HM, Dong CW, Xu XS, Zhou XM. 1995. The single grain zircon UPb ages of the Quanzhou gabbro - the origin of mafic magmatite in southeast Fujian Province. Chinese Science Bulletin, 40:158 -160( in Chinese)
[35] ［35］Li JH, Qian XL, Huang XN, Liu SW. 2000. Tectonic framework of North China Block and its cratonization in early Precambrian. Acta Petrologica Sinica, 16 ( 1 ): 1 - 10 ( in Chinese with English abstract)
[36] ［36］Li PZ, Yu JS. 1994. Isotopic geochemistry of Nianzishan alkaline miarolite. In: Chen, HS ( ed. ). Studies of Isotopic Geochemistry.Hangzhou: Zhejiang University Press, 269 - 286 ( in Chinese)
[37] ［37］Liu YS, Gao S, Jin SY, Hu SH, Sun M, Zhao ZB, Feng JL. 2001. Geochemistry of lower crustal xenoliths from Neogene Hannuoba basalt, North China craton: implications for petrogenesis and lower crustal composition. Geochimica et Cosmochimica Acta, 65: 2589 -2604
[38] ［38］Liu YS, Yuan HL, GaoS, HuZC, Wang XC, Liu XM, Lin WL. 2004. Zircon U-Pb ages of olivine pyroxenite xenolith from Hannuoba: Link between the 97 - 158 Ma basaltic underplating and granulite-facies metamorphism. Chinese Science Bulletin, 49: 1055 - 1062
[39] ［39］Loiselle MC, Wones DR. 1979. Characteristics and origin of anorogenic granites. Geological Society of America, Abstracts with Programs,11:468
[40] ［40］Lu XP, Wu FY, Zhao CB, Zhang YB. 2003. Triassic U-Pb age for zircon from granites in the Tonghua area and its response to the Dabie-Sulu ultrahigh-pressure collisional orogenesis. Chinese Science Bulletin,48(15): 1616 -1623
[41] ［41］Ludwig KR. 1995. Isoplot - a plotting and regression program for radiogenic-isotope data: U.S. Geological Survey, Open-file Report 91 -445, 45 pp
[42] ［42］Luo ZK, Guan K, Qiu YS, Miao LC, Qiu YM, McNoughton NJ, Groves DI. 2001. Zircon SHRIMP U-Pb dating of albite dyke in Jinchangyu gold mine, Jidong area, Hebei, China. Contributions to Geology and Mineral Resources Research, 16(4): 226 -231 (in Chinese with English abstract)
[43] ［43］Luo ZK, Miao LC, Guan K, Qiu YM, McNoughton NJ, Groves DI.2003. SHRIMP U-Pb zircon dating of the Dushan granitic batholith and related granite-porphyry dyke, eastern Hebei Province, China,and their geological significance. Geochimica, 32 (2): 173 - 180(in Chinese with English abstract)
[44] ［44］Martin H, Bonin B, Capdevila R, Jahn BM, Lameyre J, Wang Y. 1994. The Kuiqi peralkaline granitic complex (SE China): Petrology and geochemistry. Journal of Petrology, 35: 983 - 1005
[45] ［45］Menzies MA, Fan WM, Zhang M. 1993. Paleozoic and Genozoic lithoprobes and the loss of ＞ 120 km of Archean lithosphere, SinoKorean craton, China. In: Prichard HM, Alabaster T, Harris NBW et al. (eds.). Magmatic Processes and Plate Tectonics. Geological Society Special Publication, 76: 71 - 81
[46] ［46］Mezger K, Krogstad EJ, Interpretation of discordant U-Pb zircon ages: an evaluation. Journal of Metamorphic Petrology, 15: 127 - 140
[47] ［47］Miao LC, Qiu YM, McNaughton N, Luo ZK, Groves G, Zhai YS, Fan WM, Zhai MG, Guang K. 2002. SHRIMP U Pb zircon geochronology of granitoids from Dongping area, Hebei Province,China: constraints on tectonic evolution and geodynamic setting for gold metallogeny. Ore Geology Reviews, 19:187 -204
[48] ［48］Mu BL, Shao JA, Chu ZY, et al. 2001. Sm-Nd age and Sr, Nd Isotopic characteristics of the Fanshan potassic alkaline ultramafite-syenite complex in Hebei province. Acta Petrologica Sinica, 17(3): 359 -365 ( in Chinese with English abstract)
[49] ［49］Ogasawara M. 1991. Determination of Gallium by X-ray fluorescence spectrometry and Gallium concentration of some GSJ standards.Geological Survey of Japan, Open-file Report, 158: 1 - 15 (in Japanese)
[50] ［50］Riley TR, Lest PT, Kelley SP, Millar IL, Thirlwall MF. 2003. Thinning of the Antarctic Peninsular lithosphere through the Mesozoic:evidence from Middle Jurassic basaltic lavas. Lithos, 67:163 -179
[51] ［51］Shao JA, Zhang LQ. 2002. Mesozoic dyke swarms in the north of North China. Acta Petrologica Sinica, 18 ( 3 ): 312 - 318 ( in Chinese with English abstract)
[52] ［52］Shao JA, Zhang RH, Han Q J, Zhang LQ, Qiao GS, Sang HQ. 2000. Geochronology of cumulate xenoliths and their host diorites from Harqin, eastern Nei Mongol. Geochimica, 29 (4): 331 - 336 ( in Chinese with English abstract)
[53] ［53］Shao JA, Zhang YB, Zhang LQ, Mu BL, Yang PY, Guo F. 2003. Early Mesozoic dike swarms of carbonatites and lamprophyres in Datong area. Acta Petrologica Sinica, 19 ( 1 ): 93 - 104 ( in Chinese with English abstract)
[54] ［54］Sun SS, McDonough WF. 1989. Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes.In: Saunders A D, Norry M J. (eds.), Magmatism in the Ocean Basins. Geol. Soc. Lond. Spec. Publ. 42:313-345
[55] ［55］Tarney J, Weaver BL. 1987. Geochemistry of the Scourian complex:petrogenesis and tectonic model. In: Park PG, Tarney J. ( eds. ),Evolution of the Lewisian and Camparable Terrains. Geol. Soc.Lond. Spec. Publ. 27:45-56
[56] ［56］Tatusumoto M, Basu AR, Huang W, Wang J, Xie G. 1992. Sr, Nd,and Pb isotopes of ultramafic xenoliths in volcanic rocks of eastern China: Enriched components EMI and EMII in subcontinental lithosphere. Earth and Planetary Science Letters, 113:107 -128
[57] ［57］Turner SP, Foden JD, Morrison RS. 1992. Derivation of some A-type magmas by fractionation of basaltic magma: An example from the Padthaway Ridge, South Australia. Lithos, 28:151 -179
[58] ［58］Wang JL, Li BZ, Zhou DX, Yao SC, Li ZY. 1994. Geological Chracteristics of intermediate and acid intrusions of Hebei Province and their relations to mineralization. Beijing: Geological Publishing House, 1-213 (in Chinese)
[59] ［59］Wang T, Zheng YD, Li TB, Gao YJ. 2004. Mesozoic granitic magmatism in extensional tectonics near the Mongolian border in China and their implications for crustal growth. Journal of Asian Earth Sciences, 23:715 -729
[60] ［60］Wang T, Zheng YD, Liu SW, Li TB, Ma MB. 2002. Mylonitic potassic granitoids from the Yagan metamorphic cor complex on SinoMongolian border: a mark of transition from contractile to extensional tectonic regime. Acta Petrologica Sinica, 18: 177 - 186 ( in Chinese with English abstract)
-
计量
- 文章访问数: 9362
- PDF下载数: 7379
- 施引文献: 0
下载: