全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

闽西南清流地区加里东期花岗岩锆石UPb年代学及Hf同位素组成研究

, PP. 408-418

Keywords: LA?ICPMS锆石U?Pb定年,Hf同位素组成,加里东期花岗岩,闽西南玮埔和宁化岩体

Full-Text   Cite this paper   Add to My Lib

Abstract:

通过对玮埔岩体两个代表性样品进行锆石的LA?ICP?MSU?Pb测年获得的206Pb/238U加权平均年龄分别为(429.9±3.0)Ma、(446.3±4.0)Ma,证明该岩体确实不是最早认为的印支期花岗岩,而是加里东期岩体。同时对宁化岩体一个样品的锆石LA?ICP?MSU?Pb测年结果得到206Pb/238U加权平均年龄为(448.2±2.5)Ma,同样属于加里东期岩体。进一步对闽西南清流地区玮埔和宁化岩体的锆石Lu?Hf同位素组成分析表明,εHf(t)值主要集中在-0.8~-10.4之间,且Hf二阶段模式年龄(TDM2)集中在1.72~2.34Ga之间,表明其岩浆源区来自华夏地块元古代地壳物质。并结合其他己发表的相关年代学和地球化学资料,可以推断包括玮埔和宁化岩体在内的华南内陆地区加里东期花岗岩很可能是元古宙基底深熔而成的产物;其形成与陆内地壳物质叠置加厚所引起的再造作用关系紧密。

References

[1]  陈日明,陈兴高. 1999. 清流玮埔地区花岗岩的时代和岩石序列. 福建地质,18(1):20-26.
[2]  周新民.2003.对华南花岗岩研究的若干思考. 高校地质学报,9(4):556-565.
[3]  朱金初,张佩华,谢才富,张辉,杨策.2006.南岭西段花山-姑婆山侵入岩带U?Pb年龄格架及其地质意义. 岩石学报,22(9):2270-2278.
[4]  Blichert?Toft J, Chauvel C and Albarède F. 1997. Separation of Hf and Lu for high?precision isotope analysis of rock samples by magnetic sectormultiple collector ICP MS. Contributions to Mineralogy and Petrology, 217: 248-260.
[5]  Faure M, Sun Y, Shu L, Monié P and Charvet J. 1996. Extensional tectonics within a subduction?type orogen: The case study of the Wugongshan dome(Jiangxi Province, southeastern China). Tectonophysics, 263: 77-106.
[6]  Goolaerts A, Mattielli N and De Jong J. 2004. Hf and Lu isotopic reference values for the zircon standard 91500 by MC?ICP?Ms. Chemical Geology, 206:1-9.
[7]  Guo L Z, Shi Y S, Lu H F, Ma S R, Dong H G and Yang S F. 1989. The pre?Devonian tectonic patterns and evolution of South China. J SE Asian Earth Sci, 3: 87-93.
[8]  Griffin W L, Wang X and Jackson S E. 2002. Zircon chemistry and magma genesis, SE China: In?situ analysis of Hf isotopes, Tonglu and Pingtan igneous complexes. Lithos, 61: 237-269.
[9]  Li X H, Li W X, Li, Z.X, Lo C H, Wang J, Ye M F and Yang Y H. 2009. Amalgamation between the Yangtze and Cathaysia Blocks in South China: Constraints from SHRIMP U?Pb zircon ages, geochemistry and Nd?Hf isotopes of the Shuangxiwu volcanic rocks. Precambrian Research, 174(1-2): 117-128.
[10]  Ludwig K R. 2003. Users manual for Isoplot/Ex(rev2.49): A geochronological toolkit for Microsoft Excel. Berkeley Geochron Cent Spec Pub: 1-55.
[11]  Scherer E, Munker C and Mezger K. 2001. Calibration of the lutetium?hafnium clock. Science, 293: 683-687.
[12]  Wan Y S, Liu D Y and Xu M H. 2007. SHRIMP U?Pb zircon geochronology and geochemistry of metavolcanic and metasedimentary rocks in Northwestern Fujian, Cathaysia block, China: Tectonic implications and the need to redefine lithostratigraphic units. Gondwana Res, 12(1-2): 166-183.
[13]  Wang Y J, Fan W M, Zhao G C, Ji S C and Peng T P. 2007a. Zircon U?Pb geochronology of gneissic rocks in the Yunkai massif and its implications on the Caledonian event in the South China Block. Gondwana Research, 12: 404-416.
[14]  Wang Y J, Fan W M and Sun M. 2007b. Geochronological,geochemical and geothermal constraints on petrogenesis of the Indosinian peraluminous granites in the South China Block: A case study in the Hunan Province. Lithos, 96: 475-502.
[15]  Wang Y J, Zhang Y H, Fan W M, Xi X W, Guo F and Lin G. 2002. Numerical modeling for generation of Indo?Sinian peraluminous granitoids Hunan Province: Basaltic underplating vs tectonic thickening. Sci in China (D series), 45(11): 1042-1056.
[16]  Yang J H, Wu F Y, Simon A Wilde, Elena B and William L G. 2008. Mesozoic decratonization of the North China block. Geology, 36(6): 467-470.
[17]  Yuan H L, Gao s and Liu X M. 2004. Accurate U?Pb age and trace element determinations of zircon by laser ablation?inductively coupled plasma mass spectrometry. Geostand Geoanaly Res, 8(3): 353-370.
[18]  陈正宏,李寄?,谢佩珊,曾雯,周汉文. 2008. 利用EMP独居石定年方法探讨浙闽武夷山地区变质基底岩石与花岗岩的年龄. 高校地质学报, 14(1): 1-15. 福建省地质矿产局.1985.福建省区域地质志. 北京: 地质出版社.
[19]  耿红燕,徐夕生,S.Y.0’Reilly,赵明,孙涛.2006.粤西白垩纪火山-侵入岩浆活动及其地质意义. 中国科学(D辑),36(7):601-617. 李昌发. 1991.广州地区混合岩的基本特征. 广东地质, 6(1):17-31.
[20]  李献华.1990.万洋山-诸广山花岗岩复式岩基的岩浆活动时代与地壳运动. 中国科学(B辑),20(7):747-755.
[21]  楼法生,沈渭洲,王德滋,舒良树,吴富江,张芳荣,于津海. 2005.江西武功山穹窿复式花岗岩的锆石U?Pb年代学研究. 地质学报,79(5):636-644.
[22]  任纪舜.1990.论中国南部的大地构造. 地质学报, 20(3):275-288.
[23]  孙涛.2006.新编华南花岗岩分布图及其说明.地质通报,25(3):332-337.
[24]  王岳军,Y.H.Zhang, 范蔚茗,席先武. 2002. 湖南印支期过铝质花岗岩的形成:岩浆底侵与地壳加厚热效应的数值模拟. 中国科学(D辑), 32(6):491-499.
[25]  吴福元,李献华,郑永飞,高山. 2007. Lu?Hf同位素体系及其岩石学应用. 岩石学报,23(2):185-220.
[26]  吴富江,张芳荣. 2003.华南板块北缘东段武功山加里东期花岗岩特征及成因探讨.中国地质,30(2):166-172.
[27]  徐先兵,张岳桥,舒良树,贾东,王瑞瑞,许怀智.2009.闽西南玮埔岩体和赣南菖蒲混合岩锆石LA?ICPMS U?Pb年代学:对武夷山加里东运动时代的制约. 地质论评,55(2):277-285.
[28]  袁洪林,高山,罗彦,宗春蕾,戴梦宁,柳小明,第五春荣. 2007. Lu?Hf年代学研究――以大别榴辉岩为例. 岩石学报,23(2):233-239.
[29]  曾雯,张利,周汉文. 2008.华夏地块古元古代基底的加里东期再造:锆石U?Pb年龄、Hf同位素和微量元素制约.科学通报, 53(3):335-344.
[30]  曾勇,廖群安. 2000.西武夷地区加里东期花岗岩与造山过程. 中国区域地质, 19: 344-349.
[31]  Chen J F and Jahn Bor?ming.1998. Crustal evolution of southeastern China: Nd and Sr isotopic evidence. Tectonophysics, 284:101-133.
[32]  Charvet J, Shu L S, Shi Y S, Guo L Z and Faure M. 1996. The building of south China: Collision of Yangtze and Cathaysia blocks, problems and tentative answers. J SE Asian Earth Sci, 13 (3-5):223-235.
[33]  Chu M F, Chung S L and Song B. 2006. Zircon U?Pb and Hf isotope constraints on the Mesozoic tectonics and crustal evolution of southern Tibet. Geology, 34: 745-748.
[34]  DeBievre P and Taylor P D P. 1993. Table of the isotopic composition of the elements. Int J Mass Spectrom Ion Process, 123:1-149.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133