The excavation stage of basin formation - A qualitative model
The excavation stage of basin formation - A qualitative model
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盆地形成的开挖阶段 - 定性模型
DOI：
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发表时间：
1981
期刊：
影响因子：
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通讯作者：
S. Croft
中科院分区：
文献类型：
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作者：
S. Croft
行星地质学和地球物理学中最复杂的问题之一是确定数十至数千公里尺度的撞击坑过程的性质，这些撞击坑过程产生了复杂的多环盆地形态结构。陨石坑过程通常被认为分为三个阶段，包括弹丸与行星地壳之间初始接触的短暂高压阶段、最终形成瞬态陨石坑的较长挖掘或陨石坑流动阶段以及更长的修改阶段，在此期间瞬态陨石坑被修改为观察到的最终地质形态。瞬态凹坑可以被认为是修改阶段的初始边界条件。在本研究中，瞬态弹坑的性质是通过挖掘阶段数值模拟确定的弹坑流场来指示的。关注经验和理论尺度。
One of the most complex problems in planetary geology and geophysics is the determination of the nature of the impact cratering processes at scales of tens to thousands of kilometers that produce the complex morphological structures of multiring basins. The cratering process is frequently considered to be divided into three stages, including a short high-pressure stage of initial contact between the projectile and the planetary crust, a longer excavation or cratering flow stage culminating in the formation of a transient crater, and a still longer modification stage during which the transient crater is modified into the observed final geologic form. The transient crater may be considered as the initial boundary condition of the modification stage. In the present investigation, the nature of the transient crater is indicated by the cratering flow field determined from numerical simulations of the excavation stage. Attention is given to empirical and theoretical scaling.