• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Semibrittle Deformation of Granite at Upper Crustal Conditions
【24h】

Semibrittle Deformation of Granite at Upper Crustal Conditions

机译：上地壳条件下花岗岩的半致裂变形

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This work addresses semibrittle deformation of rock, characteristic of high temperature and low pressure environments, which is by definition multimechanistic and therefore probably multi-rheologic. To enhance the understanding of this deformation regime the results are presented on: (1) finite element models which simulate polyphase aggregate deformation, (2) deformation experiments appropriate to the above environmental conditions, and (3) detailed observations of (2). The deformation is multimechanistic with microfracturing of apparent extensile and shear origin, glide in quartz and biotite, microfracture healing, dissolution, mineral alteration, incipient and partial melt, the mechanisms observed and evaluated as functions of temperature and strain. I attempted to partition the bulk specimen deformation into that contributed by the individual mineral species in the analysis. The systematic change in micromechanisms observed with increasing temperature is compatible with the origin of the gradational succession of macroscopic deformation modes from a single narrow fault (T/Tm less than or equal to .5) to a shear zone (T/Tm approx. = .6), to multiple shear fractures (T/Tm approx. = .75), to uniform flow (T/Tm greater than or equal to .9). 49 figs., 4 tabs. (ERA citation 11:021145)

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号