• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >Gouge formation by dynamic pulverization during earthquake rupture
【24h】

Gouge formation by dynamic pulverization during earthquake rupture

机译：地震破裂过程中动态粉碎产生的油灰

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

It is proposed here that fault gouge forms by rock pulverization within the tip region of a fast propagating earthquake due to the intensity of stress and rates of strain in this zone. To examine this mechanism, we calculate the deformation conditions of a dynamic shear fracture propagating close to the limiting Rayleigh wave velocity. The mechanical conditions close to the fracture tip are extreme: tensile stresses approach 5 GPa, volumetric strain rates exceed 10(5) s(-1), and volumetric expansion alternates with volumetric contraction. It is expected that a localized zone a few millimeters wide will be pulverized under these conditions. This mechanism of dynamic gouge formation provides new insight to recent observations of the texture of gouge from the San Andreas fault-zone and from rupture zones in South African mines. Further, as such extreme conditions develop only during fast propagating earthquakes, presence or absence of pulverized gouge may serve as an indicator of earthquake propagation velocity. (c) 2005 Elsevier B.V. All rights reserved.
机译：在此提出，由于该区域的应力强度和应变速率，在快速传播的地震的尖端区域内通过岩石粉碎形成断层泥。为了检查这种机制，我们计算了一个动态剪切断裂的变形条件，该断裂条件在接近极限瑞利波速度的情况下传播。靠近断裂尖端的机械条件是极端的：拉伸应力接近5 GPa，体积应变率超过10（5）s（-1），体积膨胀与体积收缩交替出现。预期在这些条件下将粉碎几毫米宽的局部区域。动态断层泥形成的机理，为最近从圣安德烈亚斯断层带和南非矿山破裂区断层构造的观察提供了新的见识。此外，由于这种极端条件仅在快速传播的地震期间发展，因此，粉尘凿的存在与否可作为地震传播速度的指标。 （c）2005 Elsevier B.V.保留所有权利。

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