...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Deep-Sea Research >Carlsberg Ridge and Mid-Atlantic Ridge: Comparison of slow spreading centre analogues
【24h】

Carlsberg Ridge and Mid-Atlantic Ridge: Comparison of slow spreading centre analogues

机译：嘉士伯岭和大西洋中脊：慢速扩展中心类似物的比较

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

Eighty per cent of all mid-ocean spreading centres are slow. Using a mixture of global bathymetry data and ship-board multibeam echosounder data, we explore the morphology of global mid-ocean ridges and compare two slow spreading analogues: the Carlsberg Ridge in the north-west Indian Ocean between 57 degrees E and 60 degrees E, and the Kane to Atlantis super-segment of the Mid-Atlantic Ridge between 21 degrees N and 31 degrees N. At a global scale, mid-ocean spreading centres show an inverse correlation between segment length and spreading rate with segmentation frequency. Within this context, both the Mid-Atlantic Ridge super-segment and Carlsberg Ridge are similar: spreading at 22 and 26 mm/yr full rates respectively, being devoid of major transform faults, and being segmented by dextral, non-transform, second-order discontinuities. For these and other slow spreading ridges, we show that segmentation frequency varies inversely with flank height and ridge axis depth. Segments on both the Mid-Atlantic Ridge super-segment and Carlsberg Ridge range in aspect ratio (ridge flank height/axis width), depth and symmetry. Segments with high aspect ratios and deeper axial floors often have asymmetric rift flanks and are associated with indicators of lower degrees of melt flux. Segments with low aspect ratios have shallower axial floors, symmetric rift flanks, and evidence of robust melt supply. The relationship between segmentation, spreading rate, ridge depth and morphology, at both a global and local scale, is evidence that rates of melting of the underlying mantle and melt delivery to the crust play a significant role in determining the structure and morphology of slow spreading mid-ocean ridges. (C) 2015 The Authors. Published by Elsevier Ltd.
机译：在所有中海传播中心中，有80％的速度缓慢。结合使用全球测深数据和船上多波束回声测深仪数据，我们探索了全球中洋海脊的形态，并比较了两种缓慢扩散的类似物：印度洋西北部的Carlsberg脊，位于东经57度和东经60度之间，以及中大西洋海岭的凯恩至亚特兰蒂斯超分段在21度N和31度N之间。在全球范围内，中海扩张中心显示分段长度和扩展率与分段频率成反比。在此背景下，大西洋中脊超段和嘉士伯岭都相似：分别以22和26毫米/年的全速传播，没有主要的转换断层，并被右旋，非转换，第二次分割订单不连续。对于这些和其他缓慢扩散的山脊，我们表明分割频率与侧面高度和山脊轴深度成反比。大西洋中脊超段和嘉士伯脊上的分段的纵横比（脊侧面高度/轴宽），深度和对称性均在范围内。具有高长宽比和较深轴向底面的部分通常具有不对称的裂谷侧面，并与较低熔体通量的指标相关。长宽比低的段的轴向底面较浅，裂痕侧面对称，并且熔体供应稳定。在全球和局部范围内，分段，扩展速率，脊深和形态之间的关系证明，下地幔的融化速率和向地壳的融化速率在确定慢速扩展的结构和形态方面起着重要作用中海脊。 （C）2015作者。由Elsevier Ltd.发布

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