...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of structural geology >Horizontal strain-rates and throw-rates across breached relay zones, central Italy: Implications for the preservation of throw deficits at points of normal fault linkage
【24h】

Horizontal strain-rates and throw-rates across breached relay zones, central Italy: Implications for the preservation of throw deficits at points of normal fault linkage

机译：意大利中部突破的中继区的水平应变率和抛掷率：对于保持正常断层连接点的抛掷缺陷的意义

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

In order to investigate the relationship between the throws and 3D orientation of breaching faults crossing relay zones, kinematic data, throw-rates and total throws have been measured for an active normal fault in the Italian Apennines that displays a relay zone at its centre. The c. 0.8 km long breaching fault dips at 67 ± 5° and strikes obliquely to c. 2-3 km long faults outside the relay zone which dip at 61 ± 5°. Total throws of pre-rift limestone define a throw profile with a double maximum (370 ± 50 m; 360 ± 50 m) separated by an area of lower throw (100 ± 50 m) where the breaching fault is growing. Throw-rates implied by offsets across bedrock scarps of Late Pleistocene-Holocene landforms (15 ± 3 ka) are higher across the breaching fault (0.67 ± 0.13 mm/yr) than for locations of throw maxima on the neighbouring faults (0.38 ± 0.07 mm/yr; 0.55 ± 0.11 mm/yr). The deficit in total throw will be removed in 0.68-1.0 Myr if these deformation rates continue. To investigate why the highest throw-rates occur in the location with lowest total throw, Kostrov horizontal strain-rate tensors were calculated in 1 × 2 km boxes. We show that the oblique strike and relatively high dip of the breaching fault mean that it must have a relatively high throw-rate in order for it to have a horizontal strain-rate concomitant with its position at the centre of the overall fault. We show that whether throw minima at locations of fault linkage are preserved during progressive fault slip depends on the 3D orientation of the breaching fault We use the above to discuss the longevity of throw deficits and multiple throw maxima along faults in relation to seismic hazard and landscape evolution.
机译：为了调查穿越中继区域的突破性断层的投掷与3D方向之间的关系，对意大利亚平宁山脉中活动的正常断层的运动数据，投掷率和总投掷进行了测量，并在其中心显示了一个接力区。 c。 0.8 km长的断裂断层倾角为67±5°，倾斜走向c。中继带外部2-3公里长的断层倾角为61±5°。裂谷前石灰石的总投掷定义了一个投掷剖面，该投掷剖面具有两倍的最大值（370±50 m； 360±50 m），由一个断层不断扩大的较低投掷区域（100±50 m）隔开。晚更新世-全新世地貌的基岩陡坡偏移所隐含的抛出速率（15±3 ka）高于断裂断层（0.67±0.13 mm / yr），高于相邻断层上的最大抛出位置（0.38±0.07 mm） /年； 0.55±0.11毫米/年）。如果这些变形率持续下去，总投掷量的不足将在0.68-1.0 Myr中消除。为了调查为什么最高抛出率发生在总抛出率最低的位置，在1×2 km的盒子中计算了Kostrov水平应变率张量。我们表明，倾斜断裂和断裂断层相对较高的倾角意味着它必须具有较高的抛掷率，才能使其水平应变率与其在整个断层中心的位置相伴。我们表明在渐进式断层滑动过程中是否保留断层链接处的投掷最小值取决于断裂断层的3D方向。我们使用以上内容讨论了与地震灾害和景观相关的沿断层的投掷缺陷和多次投掷最大值的寿命演化。

著录项

  • 来源
    《Journal of structural geology》 |2009年第10期|1145-1160|共16页
  • 作者

    J.P. Faure Walker; G.P. Roberts; P.A. Cowie; I.D. Papanikolaou; P.R. Sammonds; A.M. Michetti; R.J. Phillips;

  • 作者单位

    Research School of Earth Sciences, UCL/Birkbeck, Gower Street, London, WC1E 6BT, UK;

    Research School of Earth Sciences, UCL/Birkbeck, Gower Street, London, WC1E 6BT, UK;

    Institute of Geography School of GeoSciences, University of Edinburgh, Drummond Street, Edinburgh, EH8 9XP, UK;

    Research School of Earth Sciences, UCL/Birkbeck, Gower Street, London, WC1E 6BT, UK;

    Research School of Earth Sciences, UCL/Birkbeck, Gower Street, London, WC1E 6BT, UK;

    Universita dell'Insubria, Dipartimento di Scienze, CC.FF.MM., Via Lucini, 3, 22100, Como, Italy;

    Institute of Geography School of GeoSciences, University of Edinburgh, Drummond Street, Edinburgh, EH8 9XP, UK;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    active normal fault; relay ramp; breaching; kostrov strain; rates of breaching;

    机译：活动正常故障;继电器斜坡违反科斯特罗夫菌株违反率;

相似文献

  • 外文文献
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