High Resolution Models of Tectonics and Magmatism at Mid-Ocean Ridges

现有的大洋中脊扩展过程模型不能解释一些主要特征，如狭窄的轴向高度。这种失败的原因是没有考虑近轴区域的岩浆加载，以及在数值模式中没有以足够的空间和时间分辨率关注该区域。提出了考虑岩浆荷载作用下薄轴向岩石圈周期性坍塌的窄高和轴向峰谷的新概念模型。新的模型预测将根据以下数据进行测试：与狭窄的轴向高点有关的断层模式、轴向顶槽的分布、熔岩流作为轴线形状函数的年龄分布，以及在构造窗口中看到的快速扩张地壳部分的旋转程度。

Present models of mid-ocean ridge spreading processes fail to explain some major features, such as narrow axial highs. This failure stems from not considering magmatic loading of the near axis region and form not focusing on that region with sufficient spatial and temporal resolution in numerical models. New conceptual models for narrow high and axial summit troughs are suggested involving periodic collapse of thin axial lithosphere under the weight of magmatic loads. New model predictions will be tested against data on fault patterns associated with narrow axial highs, the distribution of axial summit troughs, the age distribution of lava flows as a function of shape of the axis, and the degree of rotation of sections of fast-spreading crust seen in tectonic windows.