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Cenozoic climate change as a possible cause for the rise of the Andes

机译：新生代气候变化可能是安第斯山脉崛起的原因

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摘要

Causal links between the rise of a large mountain range and climate have often been considered to work in one direction, with significant uplift provoking climate change. Here we propose a mechanism by which Cenozoic climate change could have caused the rise of the Andes. Based on considerations of the force balance in the South American lithosphere, we suggest that the height of, and tectonics in, the Andes are strongly controlled both by shear stresses along the plate interface in the subduction zone and by buoyancy stress contrasts between the trench and highlands, and shear stresses in the subduction zone depend on the amount of subducted sediments. We propose that the dynamics of subduction and mountain-building in this region are controlled by the processes of erosion and sediment deposition, and ultimately climate. In central South America, climate-controlled sediment starvation would then cause high shear stress, focusing the plate boundary stresses that support the high Andes.
机译：人们通常认为，大山脉的上升与气候之间的因果关系是朝一个方向起作用的，而大幅度的抬升会引发气候变化。在这里，我们提出了一种机制，通过这种机制，新生代气候变化可能导致安第斯山脉的崛起。基于对南美岩石圈力平衡的考虑，我们认为，安第斯山脉的高度和构造受到俯冲带板界面沿切应力和海沟与海底之间的浮力对比的强烈控制。高地，俯冲带的切应力取决于俯冲沉积物的数量。我们建议，该区域俯冲和山区建设的动力受侵蚀和沉积物沉积以及气候的控制。在南美洲中部，受气候控制的沉积物匮乏将导致高剪切应力，集中支撑高安第斯山脉的板块边界应力。

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  • 来源
    《Nature》 |2003年第6960期|p.792-797|共6页
  • 作者

    Simon Lamb; Paul Davis;

  • 作者单位

    Department of Earth Sciences, Parks Road, Oxford, OK1 3PR, UK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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