地质科学
     首页 | 过刊浏览 |  本刊介绍 |  编委会 |  投稿指南 |  期刊征订 |  留言板 |  批评建议 |  联系我们 |  English
地质科学  1998, Vol. Issue (1): 9-16    DOI:
论文 最新目录 | 下期目录 | 过刊浏览 | 高级检索  |   
茫崖-肃北段阿尔金断裂右旋走滑运动的确定
周勇, 潘裕生
中国科学院地质研究所, 北京 100029
DETERMINATION OF THE DEXTRAL SLIP OF MANGYA-SUBEI SEGMENT OF ALTUN FAULT
Zhou Yong, Pan Yusheng
Institute of Geology, Chinese Academy of Sciences, Beijing 100029
 全文: PDF (341 KB)   HTML( )   输出: BibTeX | EndNote (RIS)      背景资料
摘要 在茫崖至肃北段阿尔金断裂内,奥陶纪地层中产出的塑性变形构造形态完整而清楚,室内的岩组分析和镜下所见发育良好的显微构造,为进一步确定阿尔金断裂的右旋走滑运动提供了有力证据。右旋走滑发生时间可能介于奥陶纪晚期至泥盆纪之间。
服务
把本文推荐给朋友
加入我的书架
加入引用管理器
E-mail Alert
RSS
作者相关文章
周勇
潘裕生
关键词阿尔金断裂   塑性变形   右旋运动   茫崖-肃北     
Abstract: This paper deals with the dextral sense of displacement of Mangya-Subei segment of Altun strike-slip fault.This fault,over 1600 km long,strikes northeast-southwest.Within the fault zones,metamorphism,rheology,progressive plastic and brittle deformation are common.The well-preserved rheomorphic and ductile structures outcropping in Ordovician rocks,including flow folds,intrastratal folds,S-C fabrics,shear cleavage and quartz c-fabrics,are representative of the products of tectonic movement occurring in the Altun mountain area.The dextral slip sense of faulting is recognized by the integration of macro-micro structures and petrofabric studies (quartz c-axis fabrics).On plan view,the two flanks of the rheomorphic folds are obviously asymmetrical.The western flanks are long and gentle,the eastern ones short and steep.Their axial planes,dipping steeply NW,strike NE-SW.They assume right-lateral shearing.Under the microscope,the well developed S-C fabrics can be seen.The S-surface cut by the C-surface is composed of oriented biotite,chlorite and quartz.It rotates 20?-40癱lockwise to the C-surface.The relative configuration of the C and S-surfaces permits the dextral shear sense to be determined.In addition,quartz c axes show pronounced asymmetrical scattering at an anticlockwise low angle from the shearing direction.Quartz c-axis fabrics are asymmetric with respect to the motion plane (ab),the sense of asymmetry accords with dextral shearing.From above analysis it can be seen that the microscopic examination and petrofabric study confirm the dextral shear sense interpreted in the field.The dextral offset probably occurred between late Ordovician and Devonian time,and activated strongly at least no later than early Devonian time.
Key wordsAltun fault   Plastic deformation   Dextral motion   Mangya-Subei   
收稿日期: 1997-05-14;
基金资助:国家攀登计划青藏项目
引用本文:   
周勇,潘裕生. 1998, 茫崖-肃北段阿尔金断裂右旋走滑运动的确定. 地质科学, (1): 9-16.
Zhou Yong,Pan Yusheng. DETERMINATION OF THE DEXTRAL SLIP OF MANGYA-SUBEI SEGMENT OF ALTUN FAULT [J]. Chinese Journal of Geology, 1998, (1): 9-16.
 
没有本文参考文献
[1] 龚晓星,佘晓宇,陈 洁,许辉群,唐婷婷,董 政. 潜北断层下降盘潭口盐泥隆起塑性变形机制及油气地质意义[J]. 地质科学, 2016, 51(3): 920-933.
[2] 冯志硕 张志诚 李建锋 郭召杰. 甘肃石包城盆地新生代沉积特征及与阿尔金断裂的关系研究[J]. 地质科学, 2010, 45(01): 181-193.
[3] 何光玉, 韩永科, 李建立, 陈建军, 魏军, 马国富, 岳焕忠, 刘永昌. 阿尔金断裂花海段新生代变形特征及时间[J]. 地质科学, 2007, (1): 84-90.
[4] 刘永江, Franz Neubauer, 葛肖虹, Johann Genser, 袁四化, 李伟民, 巩庆林, 陈元忠. 阿尔金断裂带年代学和阿尔金山隆升[J]. 地质科学, 2007, (1): 134-146,188.
[5] 柳祖汉, 吴根耀, 杨孟达, 郭泽清, 温志峰. 柴达木盆地西部新生代沉积特征及其对阿尔金断裂走滑活动的响应[J]. 地质科学, 2006, (2): 344-354.
[6] 刘俊来, 潘宏勋, 任收麦, 葛肖虹, 叶惠文. 阿尔金断裂双层花状构造的厘定[J]. 地质科学, 2003, (1): 52-59.
[7] 葛肖虹, 刘永江, 任收麦, 叶慧文, 刘俊来, 潘宏勋. 对阿尔金断裂科学问题的再认识[J]. 地质科学, 2001, (3): 319-325.
[8] 郭召杰, 张志诚. 新疆吐拉盆地构造特征与含油气评价[J]. 地质科学, 1999, (3): 357-364.
 
版权所有 © 2009-2017 《地质科学》编辑部
地址:北京9825信箱  邮政编码:100029
电话:010-82998109  010-82998115