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  2003 

湖北省随州花山蛇绿混杂岩Sm―Nd、Rb―Sr同位素年代研究

Keywords: 湖北花山蛇绿混杂岩同位素年代火山岩中元古代Sm-Nd同位素Rb-Sr同位素

Full-Text   Cite this paper   Add to My Lib

Abstract:

对湖北省随州地区组成花山蛇绿混杂岩的杨家棚MORB型火山岩、小阜岛弧型火山岩进行了Sm-Nd、Rb-Sr同位素分析。由杨家棚地区火山岩样品得出的全岩Sm-Nd等时线年龄为1736±37(2σ)Ma,I_(Nd)=0.510582±42(2σ),ε_(Nd)(t)=+3.7;由小阜火山岩样品得出的全岩Sm-Nd等时线年龄为1197±170(2σ)Ma,I_(Nd)=0.51125±18(2σ),ε_(Nd)(t)=+3.1;小阜火山岩样品全岩Rb-Sr等时线年龄为737±31(2σ)Ma,I_(sr)=0.7052±13(2σ)。这些结果表明花山洋盆的形成时间可能为中元古代,而非古生代;737Ma指示了其后期的变质年龄。

References

[1]  Depaolo D J. 1988. Neodymium isotopic geochemistry. Springer-vcrlag,Berlin, Heidelberg. 1~ 188.
[2]  Dong Yunpeng, Zhang Guowei, Liu Xiaoming, Lai Shaocong. 1998.Disintegration of the Huashan Group in the Dahong mountion Area, Northern Hubei. Regional Geology of China. 17(4): 371~376 (in Chinese with English abstract ).
[3]  Dong Yunpeng, Zhang Guowei, Lai Shaocong, et al. 1999. The formulation and its tectonic significance of Huashan ophiolitic melange in Suizhou Area, Hubei Province. Science in China (Series D), 29(3): 222~231 (in Chinese).
[4]  Jahn B M. 1990. Origin of granulites: geochemical constraints from Archean grnulite facies rocks of Sino-Korean Craton, China. In:D. Vielzeuf and Ph. vidal(eds. ), Grnulites and Crustal evolution.471~492.
[5]  Hamilton P J, Evensen N M, O′Nions R K, et al. 1979. Sm-Nd systematics of Lewisan gneisses implications for the granulites. Nature, 277 : 25~28.
[6]  Lai Shaocong, Zhang Guowei, Dong Yunpeng. 1998. Geochemical features and its tectonic significance of the meta-basalt in Zhoujiawan area, Mianlue suture zone, Qinling-Dabie mountains, Hubei province. J. Mineral Petrol. 18(2): 1~8 (in Chinese with English abstract).
[7]  Lai Shaocong, Zhang Guowei. 1999. Ophiolites and their tectonic significance in the Mianlue suture zone, Qinling-Dabie orogenic belt.Geological Review, 45(sup. ): 1062~1071 (in Chinese with English abstract).
[8]  Zhang Guowei, Meng Qingren, Lai Shaocong. 1995. Tectonics and structure of Qinling orogenic belt. Science in China(Series B). 38(11): 1379~1394.
[9]  董云鹏,张国伟,柳小明,赖绍聪.1998.鄂北大洪山地区"花山群"的解体.中国区域地质,17(4):371~376.
[10]  董云鹏,张国伟,赖绍聪,等.1999.随州花山蛇绿构造混杂岩的厘定及其大地构造意义.中国科学(D辑),29(3):222~231.
[11]  赖绍聪,张国伟,董云鹏.1998.秦岭-大别勉略缝合带湖北周家湾变质玄武岩地球化学及其大地构造意义.矿物岩石,18(2):1-8.
[12]  赖绍聪,张国伟.1999.秦岭-大别勉略结合带蛇绿岩及其大地构造意义.地质论评,45(增刊):1062-1071.
[13]  李曙光,孙卫东,张国伟,等.1996.南秦岭勉略构造带黑沟峡变质火山岩的年代学和地球化学:古生代洋盆及其闭合时代的证据.中国科学(D辑),26(3):223~230.
[14]  张国伟.1988.秦岭造山带的形成及其演化.西安:西北大学出版社,1~192.
[15]  张国伟,孟庆任,赖绍聪.1995.秦岭造山带的结构构造.中国科学(B辑),25(9):994~1003.
[16]  张宗清,刘敦一,付国民.1994.北秦岭变质地层同位素年代研究.北京:地质出版社,1~191.
[17]  张宗清,张旗.1995.北秦岭晚元古代宽坪蛇绿岩中变质基性火山岩的地球化学特征.岩石学报,11(增刊):165~177.
[18]  Coleman R G. 1984. The diversity of ophiolites. Geol. Mijinbouw.63: 141~150.
[19]  Cox K G, Hawkesworth C J. 1985. Geochemical stratigraphy of the Deccan Traps at Mahabaleshwar, Western Ghats, India, with implications for open system magamatic processes. J. Petrol. , 26:355~377.
[20]  Li Shuguang, Sun Weidong, Zhang Guowei, et al. 1996. Geochemical features and its chronology of the meta-basalt in Heigouxia area,Mianlue suture zone, South Qinling mountain. Science in China(Series D), 26(3): 223~230 (in Chinese).
[21]  Wilson M. 1989. Igneous Petrogenesis. London: Unwin Hyman, 1~323.
[22]  Xu Jifeng, Yu Xueyuan, Li Xianhua, et al. 1998. Discovery of the highly depleted N-MORB-type volcanic rocks: new evidence for the Mianlue paleo-ocean. Chinese Science Bulletin, 43(6): 510~514.
[23]  Zhang Zongqing, Zhang Qi. 1995. Geochemistry of metamorphosed Late Proterozoic Kuanping ophiolite in the Northern Qinling, China. Acta Petrol. Sinica, 11(supp. ):165~177 ( in Chinese with English abstract).

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133