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| 湘东北连云山杂岩流变学特征研究 | |
| 引用本文： | 李金冬,彭和求,贾宝华,陈俊,郭乐群,何江南,唐晓珊.湘东北连云山杂岩流变学特征研究[J].现代地质,2005,19(2):211-216. |
| 作者姓名： | 李金冬 彭和求 贾宝华 陈俊 郭乐群 何江南 唐晓珊 |
| 作者单位： | 1. 中国地质大学,地球科学与资源学院,北京,100083;湖南省地质矿产勘查开发局,湖南,长沙,410011 2. 中国地质大学,地球科学学院,湖北,武汉,430074;湖南地质调查研究院,湖南,湘潭,411100 3. 湖南地质调查研究院,湖南,湘潭,411100 |
| 基金项目： | 中国地质调查局地质大调查项目 (20001300002071，20011300000)。 |
| 摘 要： | 出露于湘东北九岭—幕阜山岭之中的连云山杂岩属于古元古代结晶基底岩系。利用野外构造解析、岩组、石英分形理论等手段, 对湘东北连云山杂岩的变形表象和变形机制进行了详细的观察和研究。结果表明: 连云山杂岩至少遭受了早期韧性剪切和晚期韧性再造两个阶段, 石英塑性流变以菱面滑移系的作用为主; 从早期构造片(麻) 岩到晚期韧性再造形成条纹条带状混合岩, 其应变速率从早期的中应变速率(10-8. 8s-1 ) 到晚期的低应变速率(10-12s-1 ) 是逐渐降低的; 岩石的塑性流动变形机制不仅反映了角闪岩相的中、上地壳形成环境, 而且表明“雪峰古陆”基底中更深层次的物质尚未抬升出来。 |
| 关 键 词： | 流变学 应变速率 连云山杂岩 湘东北 |
| 文章编号： | 1000-8527(2005)02-0211-06 |
| 修稿时间： | 2004年10月11 |
Study on Rheology Characteristics of the Lianyunshan Complex in Northeastern Hunan Province |
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| LI Jin-dong,PENG He-qiu,JIA Bao-hua,CHEN Jun,GUO Le-qun,HE Jiang-nan,TANG Xiao-shan.Study on Rheology Characteristics of the Lianyunshan Complex in Northeastern Hunan Province[J].Geoscience——Journal of Graduate School,China University of Geosciences,2005,19(2):211-216. | |
| Authors: | LI Jin-dong PENG He-qiu JIA Bao-hua CHEN Jun GUO Le-qun HE Jiang-nan TANG Xiao-shan |
| Institution: | LI Jin dong 1,2,PENG He qiu 3,4,JIA Bao hua 1,2,CHEN Jun 4,GUO Le qun 4,HE Jiang nan 4,TANG Xiao shan 4 |
| Abstract: | The Lianyunshan complex, cropping in the Jiuling Mufushan range in the northeastern Hunan Province, belongs to the paleo Proterozoic crystalline basement rocks. By means of field structure analysis, petrofabrics and fractal dimension analysis of quartz, the authors have carefully studied the deformation feature and mechanism of the Lianyunshan complex in the northeastern Hunan Province. The results are : (1)the Lianyunshan complex has undergone two stages of the earlier ductile shear and the later ductile reconstruction. Plastic flow deformations of quartz grains are mainly rhombohedral slip; (2)strain rate gradually reduces from the earlier structural schist (gneiss) of middle strain rate(10 8 8 s -1 )to the later ductile reconstruction striped migmatite of low strain rate(10 12 s -1 );(3)plastic flow deformation mechanism of the rocks not only reflects amphibolite facies formed in the mid upper crust environment, but also suggests that the deeper crustal material in the Xuefeng land have not yet been uplifted |
| Keywords: | rheology strain rate Lianyunshan complex northeastern Hunan Province |
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