闽西南晚中生代四方岩体同位素年代学、地球化学及其构造意义
Geochronology and geochemical characteristics in late Mesozoic Sifang pluton,southwestern Fujian, and their s ignificance
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摘要: 闽西南地区四方岩体主要由花岗闪长岩和花岗闪长斑岩组成 ,花岗闪长岩单颗粒锆石 U-Pb年龄为 10 7.8±1.2 Ma,角闪石 Ar-Ar年龄为 10 4.8± 0 .8Ma,形成于早白垩世。岩体是在伸展拉张构造环境下以快速冷却 (50～ 60℃ / Ma)侵位的 ,岩石相对富 Na2 O,A / CNK<1,具壳 -幔混合源 I型花岗岩特征。岩石富 K、Rb、Th、U、L REE,贫 Ti、Nb、Ta、Sr,具火山弧/活动大陆边缘钙碱性岩系的特征。 (87Sr/ 86Sr) i为 0 .70 63 5～ 0 .70 898,εNd(t)为 -5.2 4～ -3 .69,TDM为 1.3 3～ 1.2 1Ga。岩石主要由幔源岩浆与中下地壳物质部分熔融形成的花岗质岩浆的混合形成的。与闽东沿海地区相比 ,晚中生代时闽西南地区总体处于与华南软流圈地幔上涌有关的伸展拉张构造环境 ,但由玄武岩浆底侵作用引发的壳幔作用并不强烈。该时期中酸性岩浆作用与成矿关系十分密切
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Key words:
- Granodiorites /
- Geochronology and thermal evolution /
- Tectonic environment /
- Southw estern Fujian /
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[1] ［1］Charvet J, Lapierre H, Yu Y. 1994. Geodynamic significance of the Mesozoic volcanism of southeastern China. Asian Earth. Sci., 68: 387～396
[2] ［2］Chen JF and Jahn BM. 1998. Crustal evolution of southeastern China: Evidence from Sr, Nd and Pb isotopic composition of granitoids and sedimentary rocks. Tectonophy., 284: 101～133
[3] ［3］Chen JF and Jahn BM. 1999. Nd, Sr and Pb isotopic evidence and continental crust evolution of southeastern China. In: Zheng YF (ed). Chemical Geodynamics. Beijing: Science Press. 262-286 (in Chinese with English abstract)
[4] ［4］Chen JF, Guo XS, Tang JF and Zhou TX. 1999. The crustal accretion and Nd model ages. Journal of Nanjing University (Natural Science), 35(6):649-658 (in Chinese with English abstract)
[5] ［5］Collins WJ. 1982. Nature and origin of A type granites with particular reference to southeastern Australia. Contrib. Mineral. Petrol., 80:189-200
[6] ［6］Dodson MH. 1973. Closure temperature in cooling geochronological and petrological system. Contrib. Mineral. Petrol., 40:259-274
[7] ［7］Dong CW, Zhou XM, Li HM, Ren SL, Zhou XH. 1997. Late Mesozoic interaction of crust-mantle mixing in southeastern Fujian: Isotopic evidence for Pingtang intrusive complex. Chinese Sci. Bull., 42(9):960-962 (in Chinese)
[8] ［8］Foley S, Amand N, Liu J. 1992. Potassic and ultrapotassic magmas and their origin. Lithos, 28: 181-185
[9] ［9］Gang XC, Li HM, Sun DZ. 1993. Study of the geochronology for Precambrian metamophic bases in northern Fujian. Fujian Geology, 12(1):17～31 (in Chinese)
[10] ［10］Glazner AF and Ussler W. 1989. Crustal extension, crustal density and the evolution of Cenozoic magmatism in the Basin and Range of the Western United States. J. Geophys. Res., 94(136):7852-7960
[11] ［11］Guo XS, Chen JF, Zhang X, Tang JF, Xie Z, Zhou TX, Liu YL. 2001. Nd isotopic ratios of K-enriched magmatic complexes from southeastern Guangxi province: Implications for upwelling of the mantle in southeastern China duing the Mesozoic. Acta Petrologica Sinica, 17(1):19～27(in Chinese with English abstract)
[12] ［12］Harison T M, Armstrong R E, Naeser C W. 1979. Geochronology and thermal history of the Coast Plutonic Complex, near Prince Rupert, British Columbia. Can. J. Earth Sci., 16:400～410
[13] ［13］Huang X, Sun SH, DePaolo CJ and Wu KL. 1986. Nd-Sr isotope study of Cretaceous magmatic rocks from Fujian province. Acta Petrologica Sinica, 2(2):50-63 (in Chinese with English abstract)
[14] ［14］Huppert HE, Spark RSJ. 1988. The generation of granitic magmas by intrusion of basalt into continental crust. J. Petrol.,29(3):599-624
[15] ［15］Jahn BM, Chen PY, Yen TP. 1976. Rb-Sr ages of granitic rocks in southeastern China and their tectonic significance. Geol. Soc. Amer. Bull., 86:763～776
[16] ［16］Lan CY, Jahn BM, Mertzman SA. 1996. Subduction-related granitic of Taiwan. Southeast Asian Earth Sci., 114:11～28
[17] ［17］Li WD, Mao JR, Zhu YH, Xie FG. 1998. Mesozoic petrology and deposit in southeastern China. Beijing: Seismological Press (in Chinese)
[18] ［18］Li XH, Gui XT. 1990. Discussion on the methods of dating age for granites. J. Geochem., (4):303-311 (in Chinese with English abstract)
[19] ［19］Li XH. 1999. Cretaceous magmatic activity and lithosphere extension in South China: constraints for geochronology and geochemistry. Edited by Institute of Geochemistry, Chinese Academy of Sciences. Beijing: Sciences Press. 264-275 (in Chinese)
[20] ［20］Ling HF, Shen WZ, Huang XL. 1999. Nd and Sr isotopic compositions of granitoids of Fujian and their significance. Acta Petroloica Sinica, 15(2): 255～262.(in Chinese with English abstract)
[21] ［21］Mao JR, 1986. Convection and crystallization of pluton. J. Potential Science, 7(1):22-25(in Chinese)
[22] ［22］Mao JR, Tao KY, Yang ZL, Zhu YH, Xue HM. 1997. Geodynamics background of Mesozoic intracontinental magmatism in Southeast China. J. Geochem., 16(3):230-239
[23] ［23］Mao JR, Tao KY, Chen SY. 1998. The granitic magmatism and mineralization in southwestern Fujian. Volcanology & Mineral Resources, 19(4): 311～320 (in Chinese with English abstract)
[24] ［24］Martin H, Bonin B, Capdevila R. 1994. The Kuiqi peralkaline granitic complex (SE China):petrology and geochemistry. J. Petrol., 35(4):983-1015
[25] ［25］Miller C, Schuster R, Klotzli U et al. 1999. Post-collisional potassic and ultrapotassic magmatism in SW Tibet: Geochemical and Sr-Nd-Pb-O isotopic constraints for mantle source characteristics and petrogenesis. Journal of Petrology, 40(9):1399-1424
[26] ［26］Sun SS and McDonough WF. 1989. Chemical and isotopic systematic of oceanic basalts: implication for mantle composition and processes. In: Sauders AD, Norry MJ (ed). Magmatism in the ocean basins. Geol. Soc. Spec. Pub.,42:313-345
[27] ［27］Taylor SR and McLemann SM. 1985. The continental crust: Its composition and evolution. Blackwell, Oxford Press. 312
[28] ［28］Wang Jun. 1985. The formation and distributional regularity of terrestrial heat field in the Southeast coast area. Seismic Geology, 7(1): 49～57 (in Chinese with English abstract)
[29] ［29］Wang YJ. Fan WM. Guo F. Li X. 2001. Petrological and geochemical characteristics of Mesozoic granodioritic intrusions in Southeast Hunan Province, China. Acta Petrologica Sinica, 17(1):169-175 (in Chinese with English abstract)
[30] ［30］Xu XS, Zhou XM, Wang DZ. 1999. Relationship between interaction of crust-mantle and petrogenesis of granites for example in the coastal area of southeastern China. Geological J. China Univer., 5(3):241-250 (in Chinese with English abstract)
[31] ［31］Zhang YQ, Xie YW, Tu GC. 1987. Preliminary studies of the alkali-rich intrusive rocks in the Ailaoshan-Jinshajiang belt and their bearing on rift tectonics. Acta Petrologica Sinica, 3(1):17-27
[32] ［32］Zheng YF, Fu B, Gong B. 1996. The thermal history of the Huangmeijian granite intrusion in Anhui and its relation to mineralization: isotopic evidence. Acta Geologica Sinica, 9(2):168-180 (in Chinese with English abstract)
[33] ［33］Zhou JC, Cheng R. 2000. Study of Late Mesozoic interaction of crust-mantle in the coastal area of Zhejiang and Fujian. Progre. in Nature Sci., 10(6):572-574 (in Chinese with English abstract)
[34] ［34］Zhou JY, Wu CL, Zhuang XG. 1997. Study of terrestrial heat field and significance in eastern Zhejiang, Fujian, Guangdong. Information Geological Sciences, 16(2): 7～12.(in Chinese)
[35] ［35］Zhou XM, Li WX. 2000. Petrogenesis of Late Mesozoic magmatic rocks in southeastern China: The model combined with lithosphere delamination and basaltic underplating. Progre. in Nature Sci., 10(3):240-247 (in Chinese with English abstract)
[36] ［36］陈江峰,江博明. 1999. 钕锶铅同位素示踪和中国东南大陆地壳演化. 见:郑永飞主编. 化学地球动力学. 北京: 科学出版社,262-287
[37] 陈江峰,郭新生,汤家富,周泰禧. 1999. 地壳增生和Nd模式年龄. 南京大学学报(自然科学),35(6):649-658
[38] ［38］董传万,周新民,李惠民,任胜利,周新华. 1997. 闽东南晚中生代的壳幔混合作用: 平潭火成杂岩的同位素证据. 科学通报,42(9):960-962
[39] ［39］甘晓春,李惠民,孙大中. 1993. 闽北前寒武纪基底的地质年代学研究. 福建地质,12(1):17-31
[40] 郭新生,陈江峰,张翼,汤加富,谢智,周泰禧,刘玉龙. 2001. 桂东南富钾岩浆杂岩的Nd同位素组成: 华南中生代地幔物质上涌事件. 岩石学报, 17(1):19-27
[41] ［41］黄萱,孙世华, DePaolo DJ, 吴克隆. 1986. 福建省白垩纪岩浆岩Nd,Sr同位素研究. 岩石学报,2(2):50-63
[42] ［42］李文达,毛建仁,朱云鹤,谢华光. 1998. 中国东南部中生代火成岩与矿床. 北京:地震出版社
[43] 李献华,桂训唐. 1990. 花岗岩的定年方法学讨论. 地球化学,(4):303-311
[44] ［44］李献华. 1999. 华南白垩纪岩浆活动与岩石圈伸展--地质年代学和地球化学制约. 中国科学院地球化学研究所编.资源环境与可持续发展. 北京:科学出版社,264-275
[45] ［45］凌洪飞,沈渭洲,黄小龙. 1999. 福建省花岗岩类Nd,Sr同位素特征及其意义. 岩石学报,15(2):255-262
[46] ［46］毛建仁. 1986. 岩体的对流作用和结晶作用. 潜科学杂志,7(1):22-25
[47] ［47］毛建仁,陶奎元,陈三元. 1998. 闽西南花岗质岩浆作用与成矿. 火山地质与成矿, 19(4): 311-320
[48] ［48］王均. 1985. 东南沿海地区地热场的形成及其分布规律. 地震地质, 7(1):49-57
[49] ［49］王岳军,范蔚茗,郭峰,李旭. 2001. 湘东南中生代花岗闪长质小岩体的岩石地球化学特征. 岩石学报,17(1)169-175
[50] ［50］徐夕生,周新民,王德滋. 1999. 壳幔作用与花岗岩成因--以东南沿海为例. 高校地质学报,5(3):241-250
[51] ［51］周江羽,吴冲龙,庄新国. 1997. 浙闽粤东部地热场研究及其意义. 地质科技情报,16(2):7-1
[52] ［52］周金城,陈荣. 2000. 浙闽沿海晚中生代壳幔作用研究. 自然科学进展, 10(6):572-574
[53] ［53］周新民,李武显. 2000. 中国东南部晚中生代火成岩成因:岩石圈消减和玄武岩底侵相结合的模式. 自然科学进展, 10(3):240-247
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