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地球学报  1999 

大别造山带南部浅变质岩的锆石U-Pb年龄

Keywords: 浅变质岩,锆石U-Pb年龄,晋宁早期,加里东期

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Abstract:

在大别造山带南部,出露与超高压榴辉岩伴生,仅经过绿片岩相变质作用的浅变质岩。浅变质岩的锆石U-Pb年龄表明,其原岩形成时代为晋宁早期(1100±140Ma),与扬子地块南缘的一些岩浆岩的年龄相似。浅变质岩不一致线下交点年龄及超高压地块区域片麻岩的锆石测定结果表明,它们均受到加里东期构造热事件的影响,印支期超高压变质作用仅使浅变质岩的Rb-Sr体系重置而没有影响到其U-Pb体系。

References

[1]  陈能松,大别山区中酸性麻粒岩和变形花岗岩的锆石U-Pb年龄,科学通报,1996(11).
[2]  Rowley D B,Ages of ultrahigh pressure metamorphism and protolith orthogneisses from the eastern Dabie Shan:U/Pb zircon geochronology,Earth and Planetary Sciences Letters,1997.
[3]  Ames L,Timing of collision of the Sino-Korean and Yangtze Cartons:U-Pb zircon dating of coesite-bearing eclogites,Geology,1993.
[4]  刘晓,大别山超高压石榴多硅白云母片岩中锆石U-Pb年龄,矿物岩石地球化学通报,1996(01).
[5]  汤家富,大别山区榴辉岩带中浅变质火山-碎屑岩层组合的发现及其地质意义,安徽地质,1995(02).
[6]  简平,大别山西部熊店加里东期榴辉岩--同位素地质年代学的证据,地质学报,1997(02).
[7]  陈江峰,皖南浅变质岩和沉积岩的钕同位素组成及沉积物物源区,科学通报,1989(20).
[8]  Krogh T E,Improved accuracy of U-Pb ages by the creation of more concordant systems using a high gradient magnetic separation technique,Geochimica et Cosmochimica Acta,1982.
[9]  Krogh T E,A low contamination method for hydrothermal decomposition of zircon and extraction of U and Pb for isotopic age determinations,Geochimica et Cosmochimica Acta? ,1973, 37.
[10]  董树文,大别山超高压变质带内浅变质岩片的发现及意义,科学通报,1996(09).
[11]  Zhen Y U-Pb dating of marble associated with eclogite from the Dabie Mountains,East China [J] 1997(03) doi:10.1007/BF02870903
[12]  Chen J,Magmatism along the southeast margin of the Yangtze block:Precambrian collision of the Yangtze and Cathaysia block of China,Geology,1991.
[13]  Ames L;Tilten G R;Zhou G,Geochronology and isotopic character of ultrahigh-pressure metamorphism with implications for collision of the Sino-Korean and Yangtze cratons,Central China,Tectonics? ,1996, 15.
[14]  李曙光,大别山-苏鲁地体超高压变质年代学-Ⅱ.锆石U-Pb同位素体系,中国科学D辑,1997(03).
[15]  Dong S,Differential exhumation of tectonic units and ultrahigh-pressure metamorphic rocks in the Dabie Mountains,China,Island Arc,1998.
[16]  Liou J G,Ultrahigh-P metamorphic rocks and their associated lithologies from the Dabie Mountains,Central China:A field trip guide to the 3rd international eclogite field symposium,Chinese Science Bulletin,1995(ZK).
[17]  You Z,The high-pressure and ultra-high-pressure metamorphic belt in the east Qiling and Dabie Mountains,China,China University of Geosciences Press,1996.
[18]  郑维钊,黄陵背斜北部崆岭杂岩的太古宙信息,中国地质科学院宜昌地质研究所所刊,1991.
[19]  凌文黎,扬子克拉通黄陵地区崆岭杂岩Sm-Nd同位素地质年龄年代学研究,1997.
[20]  Ludwing K R,Isoplot--A plotting and regression program for radiogenic-isoplot date version,1997.
[21]  Krogh T E,Improved accuracy of U-Pb ages by the creation of more concordant systems using an air abrasion technique,Geochimica et Cosmochimica Acta,1982.

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