Implications of shear heating and fracture zones for ridge formation on Europa
Implications of shear heating and fracture zones for ridge formation on Europa
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剪切加热和断裂带对欧罗巴山脊形成的影响
DOI：
10.1029/2007gl031957
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发表时间：
2007
影响因子：
5.2
通讯作者：
A. Showman
中科院分区：
文献类型：
--
作者：
Lijie Han;A. Showman
我们提出了对流的 2D 和 3D 数值模拟，以测试剪切加热和断裂带对欧罗巴海脊形成的作用。我们的模拟表明，预先存在的断裂带促进了上升流和岩石圈减薄，导致地形抬升 50 m。剪切加热还促进岩石圈变薄和浮力上升，产生地形高达 120 m 的山脊状特征。即使在冰壳内非均匀 3D 对流的影响下，地形仍沿走向保持线性。尽管模拟中没有重现中央槽，但我们的结果支持了剪切加热可以在木卫二上产生脊状结构的想法。
We present 2D and 3D numerical simulations of convection to test the role of shear heating and fracture zones on Europan ridge formation. Our simulations show that a pre‐existing fracture zone promotes upwelling and lithospheric thinning, leading to topographic uplift of 50 m. Shear heating also promotes lithospheric thinning and buoyant ascent, producing a ridge‐like feature with topography up to 120 m. Topography remains linear along strike even under the influence of heterogeneous 3D convection within the ice shell. Although the central trough is not reproduced in the simulations, our results support the idea that shear heating can produce ridge‐like structures on Europa.