胶东文登长山南花岗闪长岩体的岩浆混合成因：闪长质包体及寄主岩石的地球化学、Sr-Nd同位素和锆石Hf同位素证据
Magma mixing for the origin of granodiorite: Geochemical, Sr-Nd isotopic and zircon Hf isotopic evidence of dioritic enclaves and host rocks from Changshannan granodiorite in the Jiaodong Peninsula, eastern China
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摘要: 胶东昆嵛山杂岩文登长山南花岗闪长岩体中广泛分布具有火成结构的闪长质包体，这些包体主要为椭圆形或纺锤形，定向排列，大小不等（几cm至几m），颜色较寄主岩深，粒度较细，包体具有与寄主岩石相似的矿物组合，但铁镁质矿物及斜长石含量明显比寄主岩石高，而石英和钾长石含量低于寄主岩石；镜下包体具有明显的不平衡反应结构，广泛发育针状磷灰石。在地球化学特征上，包体和寄主岩石部富集大离子亲石元素和轻稀土元素，亏损高场强元素，并具有相近的Sr、Nd同位素组成，ISr为0．70784～0．70818，εNd为-15．0～-15．5然而，包体和寄主岩石的主量元素在相关图上呈明显的线性关系，并且岩石学和锆石Hf同位素特征也明显表明文登长山南岩体在成岩过程中发生了镁铁质岩浆和长英质岩浆的混合作用。在岩浆混合作用过程中，全岩Sr、Yd同位素和晚期生成的矿物组成比较快速地达到了均一化，而主量元素和高温矿物锆石Hf同位素组成则残留了原始岩浆的部分特征研究表明，锆石Hf同位素在岩浆混合作用过程中不容易达到同位素平衡，其同位素组成比全岩Sr、Nd同位素更能有效地示踪混合岩浆的源区特征和岩浆混合过程。
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Key words:
- Microdioritic enclave /
- Granodiorite /
- Geochemistry /
- Zircon Hf-isotope /
- Magma mixing /
- Changshannan /
- Jiaodong Peninsula
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[1] Allen C M. 1991. Local equilibrium of mafic enclaves and granitoids of the Turtle pluton, southeast California: Mineral, chemical, and isotopic evidence. American mineralogist, 76: 574 - 588
[2] Bacon C R. 1986. Magmatic inclusions in silicic and intermediate volcanic rocks. Journal of Geophysical Research, 91: 6091 -6112
[3] Barbarin B. 2005. Mafic magmatic enclaves and mafic rocks associated with some granitoids of the central Sierra Nevada batholith,California: mature, origin, and relations with the hosts. Lithos, 80:155 - 177
[4] Bateman R. 1993. Mineral disequilibria under the microscope. In Bateman R and Castro A (eds). Heterogeneities in felsic igneous rocks at scales from crystals to plutons. Workshop Notes, 4 -7. Sevilla: Universidad de Sevilla
[5] Blichert-Toft J, Albarede F. 1998. The Lu-Hf geochemistry of chondrites and evolution of the mantle-crust system. Earth and Planetary Science Letters, 148: 243 -258
[6] Bonin B. 2004. Do coeval mafic and felsic magmas in post-collisional to within-plate regimes necessarily imply two contrasting, mantle and crustal, sources? A review. Lithos, 78: 1 -24
[7] Cantagrel J M, Didier J, Gourgrud A. 1984. Magma mixing: origin of intermediate rocks and "enclaves" from volcanism to plutonism.Physics of the Earth and Planetary Interiors, 35: 63 -76
[8] Castro A. 1993. Biotite-hornblende relationships in calc-alkaline granitiods and enclaves. In Bateman R and Castro A (eds)Heterogeneities in felsic igneous rocks at scales from crystals to plutons. Workshop notes, 3. Sevilla: Universidad de Sevilla
[9] Chappell B W, White A J R, Wyborn D. 1987. The importance of residual source material (restite) in granite petrogenesis. Journal of Petrology, 28: 1111 - 1138
[10] Chappell B W, White A J R. 1992. I- and S-type granites in the Lachlan Fold Belt. Transactions of the Royal Society of Edinburgh: Earth Sciences, 83: 1 - 26
[11] Chen Y D, Price R C, White A J R, Chappell B W. 1989. Inclusions in three S-type granites from southeastern Australia. Journal of Petrology, 30: 1181 - 1218
[12] Cheng Zhongmei. 2003. Genesis of microgranular enclaves in Shouwangfen granodiorites, Hebei Province. Geosciences, 17 ( 1 ):20 -26 (in Chinese with English abstract)
[13] Collins W J. 1998. Evaluation of petrogenetic models for Lachlan Fold Belt granitoids: Implications for crustal architecture and tectonic models. Australian Journal of Earth Sciences, 45: 483 - 500
[14] De Paolo D J. 1981. Neodymium isotopes in the Colorado Front Range and crust-mantle evolution in the Proterozoic. Nature, 291: 193 -196
[15] Didier J, Barbarin B. 1991. Enclaves and Granite Petrology,Developments in Petrology. Amsterdam: Elsevier, 1 -625
[16] Eberz G W, Nicholls I A, Maas R, McCulloch M T, Whiteford D J.1990. The Nd- and Sr- isotopic composition of microgranitoid enclaves and their host rocks from the Swifts Creek pluton, southeast Australia. Chemical Geology, 85: 119 - 134
[17] Fan H R, Zhai M G, Xie Y H, Yang J H. 2003. Ore-forming fluids associated with granite-hosted gold mineralization at the Sanshandao deposit, Jiaodong gold province, China. Mineralium Deposita, 38:739 - 750
[18] Frost T P, Mahood G A. 1987. Field, chemical, and physical constraints on mafic-felsic magma interaction in the Lamarck Granodiorite,Sierra Nenada, California. Geological Society of America Bulletin,99: 272 - 291
[19] Gagnevin D, Daly J S, Poli G. 2004. Petrographic, geochemical and isotopic constraints on magma dynamics and missing in the Miocene Monte Capanne monzogranite ( Elba Island, Italy). Lithos, 78: 157- 195
[20] Griffin W L, Pearson N J, Belousova E, Jackson S E, van Achterbergh E, OReilly S Y, Shee S R. 2000. The Hf isotope composition of cratonic mantle: LAM-MC-ICPMS analysis of zircon megacrysts in kimberlites. Geochimica et Cosmochimica Acta, 64:133 -147
[21] Griffin W L, Wang X, Jackson S E, Pearson N J, OReilly S Y, Xu X S,Zhou X M. 2002. Zircon chemistry and magma mixing, SE China:In-situ analysis of Hf isotopes, Tonglu and Pingtan igneous complexes. Lithos, 61: 237 -269
[22] Guo F, Fan W M, Wang Y J, Zhang M. 2004. Origin of early Cretaceous calc-alkaline lamprophyres from the Sulu orogen in eastern China: implications for enrichment processes beneath continental collisional belt. Lithos, 78:291 -305
[23] Guo Jinghui, Chen Fukun, Zhang Xiaoman, Fan Hongrui, Cong Bolin.2001. Petrogenesis of granites and post-collisional tectonic processes in Su-Lu UHP metamorphic belt. In: Cong BL, Zhai MG, Guo JH,Liu JM (eds.). Continental Subduction, Detachement, and Thinning. Xi\'an: Northwest University, 99 - 102 ( in Chinese)
[24] Hofmann A, Jochum K, Seufert M, White M. 1986. Nb and Pb in oceanic basalts: New constraints on mantle evolution. Earth and Planetary Science Letters, 33:33 -45
[25] Holden P, Halliday A N, Stephes W E. 1987. Neodymium and strontium isotope content of microdiorite enclaves points to mantle input to granitoid production. Nature, 330: 53 - 56
[26] Hu F F, Fan H R, Yang J H, Wan Yusheng, Liu Dunyi, Zhai Mingguo and Jin Chengwei. 2004. Mineralizing age of the Rushan lode gold deposit in the Jiaodong Peninsula: SHRIMP U-Pb dating on hydrothermal zircon. Chinese Science Bulletin, 49 ( 15 ): 1629 -1636
[27] Janou(s)ek V, Bowes D R, Braithwaite C J R, Rogers G. 2000. Microstructural and mineralogical evidence for limited involvement of magma missing in the petrogenesis of a Hercynian high-K calcalkaline intrusion: the Koz rovice granodiotite, Central Bohemian Pluton, Czech Republic. Transactions of the Royal Society of Edinburgh: Earth Sciences, 91:15-26
[28] Kumar S C. 1988. Microgranular enclaves in granitoids: agents of magma mixing. Journal of Southeast Asian Earth Sciences, 2 (3～4): 109-121
[29] Lesher C E. 1990. Decoupling of chemical and isotopic exchange during magma mixing. Nature, 344:235 -237
[30] Li Changnian. 2002. Comment on the magma mixing and their research.Geological Science and Technology Information, 21 (4): 49 - 53 ( in Chinese with English abstract)
[31] Maas R, Nicholls I A, Legg C. 1997. Igneous and metamorphic enclaves in the S-type Deddick granodiorite, Lachlan Fold Belt, SE Australia: Petrographic, geochemical and Nd-Sr isotopic evidence for crustal melting and magma mixing. Journal of Petrology, 38:815 -841
[32] Poli G, Tommasini S. 1991. Model for the origin and significance of microgranular enclaves in calc-alkaline granitoids. Journal of Petrology, 32 ( 3 ): 657 - 666
[33] Poli G. 1992. Geochemistry of Tuscan Archipelago granitoids, central Italy: the role of hybridization processes in their genesis. Journal of Geology, 100:41 -5632. Qiao Guangsheng. 1988. Normalization of isotopic dilution analysis.Scientia Sinica ( Series A), 31 (10): 1263 - 1268
[34] Qu Xiaoming. 1997. A study on the genesis of dioritic enclaves in Guojialing granite. Acta Mineralogica Sinica, 17 (3): 302 -309(in Chinese with English abstract)
[35] Qiu Y M, Groves D I, McNaughton N J, et al. 2002. Nature, age, and tectonic setting of granitoid-hosted, orogenic gold deposits of the Jiaodong Peninsula, eastern North China craton, China. Mineralium Deposita, 37: 283 - 305
[36] Qu Xiaoming.1997. A study on the genesis of dioritic enclaves in Guojialing granite. Acta Mineralogica Sinica, 17 (3): 302 -309(in Chinese with English abstract)
[37] Ren Shengli. 1995. Tectonic evolution of the western Fujian-southern Guizhou: geochemical constraints [Ph. D. dissertation]. Beijing:Institute of Geology and Geophysics, Chinese Academy of Sciences,1 -133 (in Chinese with English abstract)
[38] Rudnick R L, Fountain D M. 1995. Nature and composition of the continental crust: A lower crustal perspective. Review in Geophysics, 33: 267 - 309
[39] Rudnick R L, Gao S. 2003. Composition of the continental crust. In:Rudnick R L ( ed. ) , The Crust, 1 - 64, Treaties on Geochemistry,v. 3. Oxford: Elsevier Pergamon
[40] Scherer E E, Cameron K L, Blichert-Toft J. 2000. Lu-Hf garnet geochronology: closure temperature relative to the Sm-Nd system and the effects of trace mineral inclusions. Geochimica et Cosmochimica Acta, 64:3413-3432
[41] Shandong Bureau of Geology and Mineral Resources. 1991. Regional Geology of Shandong Province. Beijing: Geological Publishing House ( in Chinese)
[42] Soderlund U, Patchett P J, Vervoort J D, Isachsen C E. 2004. The 176 Lu decay constant determined by Lu-Hf and U-Pb isotope systematics of Precambrian mafic intrusions. Earth and Planetary Science Letters,219:311 -324
[43] Sun S S, McDonough W F. 1989. Chemical and isotopic systematics of oceanic basalts: Implications for mantle composition and processes.In: Saunders A D and Norry M J (eds.). Magmatism in the Ocean Basins, 313 -345 Special Publication v. 42 of Geological Society
[44] Thoma J B, Sinha A K. 1999. Field, geochemical, and isotopic evidence for magma missing and assimilation and fractional crystallization processes in the Quottoon Igneous Comples, northwestern British Columbia and southeastern Alaska. Canadian Journal of Earth Sciences, 36: 819- 831
[45] Vernon R H, Etheridge M A, Wall V J. 1988. Shape and microstructure of microgranitoid enclaves: indicators of magma mingling and flow.Lithos, 22: 1 - 11
[46] Vernon R H. 1983. Restite, xenoliths and microgranitoid enclaves in granites. Journal and Proceedings of the Royal Society of New South Wales, 116:77-103
[47] Vernon R H. 1984. Microgranitoid enclaves in granites-globules of hybrid magma quenched in a plutonic environment. Nature, 309:438 -439
[48] Vernon R H. 1990. Crystallisation and hybridism in microgranitoid enclave magmas: microstructural evidence. Journal of Geophysical Research, 95: 17849 - 17859
[49] Waight T E, Dean A A, Maas R, Nieholls I A. 2000. Sr and Nd isotopic investigations towards the origin of feldspar megacrysts in microgranular enclaves in two I-type plutons of the Lachlan Fold Belt, southeast Australia. Australian Journal of Earth Sciences, 47:1105 - 1112
[50] Wang X, Griffin W L, Wang Z C, Zhou X M. 2003. Hf isotope composition of zircons and implication for the petrogenesis of Yajiangqiao granite, Hunan Province, China. Chinese Science Bulletin, 48 (10): 995 -998
[51] Xu Honglin, Zhang Dequan, Sun Guiying. 1997. Characteristics and genesis of Kunyushan granite and its relation with gold deposits in Jiaodong. Acta Petrologica et Mineralogica. 16(2): 131 - 143 ( in Chinese with English abstract)
[52] Xu Jingfang, Shen Buyun, Niu Liangzhu, Zheng Wenshen. 1989. Studies on the gold mineralization-related granites from the Jiaodong Block. Geology of Shandong, 5(2): 1 - 125 (in Chinese)
[53] Xu P, Wu F Y, Xie L W, Yang Y H. 2004. Hf isotopic compositions of the standard zircons for U-Pb dating. Chinese Science Bulletin, 49(15): 1642 -1648
[54] Yang J H and Zhou X H. 2001. Rb-Sr, Sm-Nd, and Pb isotope systematics of pyrite: Implications for the age and genesis of lode gold deposits. Geology, 29: 711 - 714
[55] Yang J H, Chung S L, Zhai M G, Zhou X H. 2004. Geochemical and Sr-Nd-Pb isotopic compositions of mafic dikes from the Jiaodong Peninsula, China: evidence for vein-plus-peridotite melting in the lithospheric mantle. Lithos, 73: 145 - 160
[56] Yang J H, Wu F Y, Chung S L, Wilde S A, Chu M F. 2004. Multiple sources for the origin of granites: Geochemical and Nd/Sr isotopic evidence from the Guodaoling granite and its mafic enclaves,northeast China. Geochimica et Cosmochimica Acta, 68:4469 -4483
[57] Yang J H, Wu F Y, Wilde S A. 2003. A review of the geodynamic setting of large-scale Late Mesozoic gold mineralization in the North China Craton: an association with lithospheric thinning. Ore Geology Reviews, 23: 125 - 152
[58] Yang Jinhui. 2000. Age and metallogenic dynamics of gold mineralization in Jiaodong Peninsula Constraints on the interaction of mantle/crust and metallogenesis/lithospheric evolution [ Ph. D. dissertation ].Beijing: Institute of Geology and Geophysics, Chinese Academy of Sciences, 1-133 (in Chinese with English abstract)
[59] Zhai Mingguo, Fan Hongrui, Yang Jinhui, Miao Laicheng. 2004. Large scale cluster of gold deposits in east Shandong: Anorogenic metallogenesis. Earth Science Frontiers, 11 ( 1 ): 85 - 98 ( in Chinese with English abstract)
[60] Zhou Xunruo. 1994. Hybridization in the genesis of granitoids. Earth Science Frontiers, 1 ( 1 ～ 2 ): 97 - 97 ( in Chinese with English abstract)
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