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...
地质论评  2001 

北大别片麻岩的锆石U―Pb年龄离子探针测定及其地质意义

Keywords: 北大别片麻岩离子探针背散射图像锆石铀-铅年龄地质意义扬子板块

Full-Text   Cite this paper   Add to My Lib

Abstract:

本文对北大别西部的湖北英山万家老屋、罗田七道河尹家店和安徽金寨丁埠乡李集3个片麻岩样品中锆石进行了BSE显微结构分析,并在此基础上对锆石进行了离子探针U-Pb年龄测定。结果表明北大别存在两种类型的片麻岩,它们的原岩分别形成于晋宁期和燕山期,其中英山万家老屋片麻岩的形成年龄为794Ma,后期地质事件对其锆石U-Pb年龄造成的影响较小;七道河尹家店片麻岩的形成年龄为730Ma,并可能受到燕山期岩浆事件的影响,得到了140Ma左右的变质年龄;丁埠乡李集片麻岩的形成年龄为140Ma。结合已有的年代学结果,北大别地体广泛存在晋宁期的岩浆事件,表明其可能为扬子板块的北缘。

References

[1]  陈道公,Etuenne Deloule,夏群科,程昊.2000.北大别片麻岩中锆石U-Pb年龄离子探针初步测定.岩石学报,16(2):199~202.
[2]  邓晋福,戴圣潜,吴宗絮,赵海玲,杜建国,罗照华.2000.大别造山带岩石学结构和热结构及其地质意义.地质学报,74(3):206~215.
[3]  徐树桐,江来利,刘贻灿.1992.大别山(安徽部分)的构造格局和演化过程.地质学报,59(4):279~285.
[4]  郑祥身,金城伟,翟明国,石永红.2000.北大别灰色片麻岩原岩性质的探讨:Sm-Nd同位素年龄及同位素成分特点.岩石学报,16(2).194~198.
[5]  Amies L, Zhou G Z, Xiong B C. 1996. Geochronology and isotopiccharacter of ultrahigh-pressure metamorphism with implicationsfor collision of the Sino-Korean and Yangtze cratons, centralChina. Tectonics, 15(2): 472~489.
[6]  Chen Daogong, Etuenne Deloule, Xia Qunke, Chen Hao. 2000. Preliminary U-Pb ion probe age determination of zircon fromgneisses, Northern Dabie Terrain. Acta Petrol. Sin., 16(2):199~202(in Chinese with English abstract).
[7]  Composton W, Willims L S, Kirschvink J L. 1992. Zircon U-Pb agesfor the Early Cambrian time scale. J. Geol. Soc. London, 149:171~184.
[8]  Deng Jinfu, Dai Shengqian, Wu Zongxu, Zhao Hailing, Du jianguo,Luo Zhaohua. 2000. Petrological structure and thermal structure of the Dabie Orogenic Belt and its geological implications.Acta Geological Sinica, 74(3):279~285(in Chinese with English abstract).
[9]  Gebauer D, Schertl H P, Brix M. 1997. 35 Ma old ultrahigh-pressuremetamorphism and evidence for very rapid exhumition in DoraMaria Massif, Western Alps. Lithos., 41: 5~24.
[10]  Mclaren A C, Gerald J D, Williams. 1994. The microstructure of zircon and its influence on the age determination from Pb/U isotopic ratios measured by ion microprobe. Geochim. Cosmochim. Acta, 58(2) :993~1005.
[11]  Mezger K, Krogstad E J. 1997. Interpretation of discordant U-Pb zircon ages: An evaluation. J. metamorphic Geol., 15:127~140.
[12]  万天丰.2001.中朝与扬子板块的鉴别特征.地质论评,47(1):57~63.
[13]  王清晨,从柏林.1998.大别山超高压变质带的大地构造框架.岩石学报,14(4):481~492.
[14]  Hacker B R, Ratschbacher L, Webb L, Ireland T, Walker D, DongS. 1998. U/Pb zircon ages constrain the architecture of the ultrahigh-pressure Qinling-Dabie Orogen, China. Earth Planet.Sci. Letters, 161:215~230.
[15]  Hanchar J M, Miller C F. 1993. Zircon zonation patterns as revealedby cathodoluminescence and backscattered electron images: Implications for interpretation of complex crustal histories. Chemical geology, 110: 1~13.
[16]  Okay A. 1993. Petrology of a diamond and coesite-bearing metamorphic terrain: Dabie Shan, China. Eur. J. Mineral, 5: 659~ 675.
[17]  Rowley D B, Xue F, Tucker R D, Peng Z X, Baker J, Davis A.1997. Ages of ultra high pressure metamorphism and protolithorthgneisses from the eastern Dabie Shan: U/Pb zircongeochronology. Earth Planet Science Letters, 151:191~20.
[18]  Rubatto D, Gebauer D, Fanning M. 1998. Jurassic formation andEocene subductions for the geodynamic evolution of the Centraland Western Alps. Contrib. Mineral Petrol., 132:269~287.
[19]  Stacey J S, Kramers J D. 1975 Approximation of terrestrial lead isotopeevolution by a two-stage model. Earth and Planetary ScienceLetters, 26: 207~221.
[20]  Vavra G, Gebauer D, Schmid R. 1996. Multiple zircon growth and recrystallization during polyphase Late Carboniferous to Triassicmetamorphism in granulites of the Ivrea Zone (Southern Alps):an ion microprobe (SHRIMP) study. Contrib. MineralPetrol , 122: 337~358.
[21]  Vavra G, Schmid R, Gebauer D. 1999. Internal morphology, habitand U-Th-Pb microanalysis of amphibole to granulite facies zircon: geochronology of the Ivren Zone(Southern Alps). Contrib. Mineral Petrol. , 134:380~404.
[22]  Wan T F. 2001. Distinctive characteristics of Sino-Korean and YangtzPlates. Geological Review, 47(1):57~63 (in Chinese withEnglish abstract).
[23]  Wang Q C, Cong B L. 1998. Tectonic framework of the ultrahighpressure metamorphic zone from Dabie Mountains. Acta Petrol.Sin., 14(4):481~492(in Chinese with English abstract).
[24]  Williams I S, Claesson S, 1987. Isotopic evidence for the Precambrianprovenance and Caledonian metamorphism of high grade paragneisses from the Seve Nappes, Scandinavian Caledonides. Contrib. Mineral Petrol., 97: 205~217.
[25]  Xu Shutong, Jiang Laili, Liu Yican. 1992. Teconic regime and evolution of Dabie Mountain (the part of Anhui Provence). Acta Geological Sinica, 59 (4):279~285 (in Chinese with English abstract ).
[26]  Xu S, Okay A, Ji S, Senger A M C, Su W, Liu Y, Jiang L. 1992.Diamond from the Dabie Shan metamorphic rock and its implication for tectonic setting. Sciences, 256: 80~82.
[27]  Xue F, Rowley D B, Tucker R D, Peng Z X. 1997. U-Pb ages ofgranitoid rocks in the north Dabie complex, eastern Dabieshan,China. J. Geol., 105:744~753.
[28]  Zhai M, Cong B, Zhao Z, et al. 1995. Petrotectonic units in coesitebearing metamorphic terrain in the Dabie Mountains, centralChina and their geotectonic implications. Jour. Southeast AsianEarth Sci., 1:1~13.
[29]  Zheng Xiangshen, Jin Chengwei, Zhai Mingguo, Shi Yonghong.2000. Approach to the source of the gray gneisses in NortrhDabie Terrain: Sm-Nd isochron age and isotope composition.Acta Petrol. Sin., 16(2):194~198(in Chinese with Englishabstract).

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133