Destruction of basaltic bodies by high-velocity impact
Destruction of basaltic bodies by high-velocity impact
复制标题
高速撞击对玄武岩体的破坏
DOI：
10.1016/0019-1035(77)90038-0
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发表时间：
1977
期刊：
影响因子：
3.2
通讯作者：
Akimasa Tsukamoto
中科院分区：
文献类型：
--
作者：
A. Fujiwara;G. Kamimoto;Akimasa Tsukamoto
作为太阳系中不同大小的固体之间碰撞过程的模拟，质量为0.37 g的聚碳酸酯弹体以2.6 km/sec的速度撞击约2 ~ 10 cm及更大的立方体玄武岩。相应的，每单位质量目标所传递的能量约为106 ~ 109ergs/g。随着目标尺寸的增大，将其划分为(1)完全破坏、(2)剩余岩心、(3)过渡区和(4)火山口形成4类。给出了碎片累积质量和最大碎片质量的经验公式。简要讨论了这些公式的相似性。实验结果用于检验一个假设，即单个火星卫星曾经因撞击而破裂，留下目前的两个卫星。据推测，母星的半径大于30公里。
As a simulation of collisional processes among solid bodies of various sizes in the solar system, polycarbonate projectiles of mass 0.37 g were impacted against cubic basaltic rocks of about 2 to 10 cm and larger with a velocity of 2.6 km/sec. The corresponding energy imparted per unit mass of target ranges from about 106to 109ergs/g. The phenomena are classified into four categories with increasing target size: (1) complete destruction, (2) remaining core, (3) transition region, and (4) crater formation. Empirical formulas for the cumulative mass of the fragments and the mass of the maximum fragment are given. The similarity of these formulas is briefly discussed. The experimental results are applied to the examination of the hypothesis that a single Martian satellite was once ruptured by impact, leaving the present two satellites. It is suggested that the radius of the parent satellite was larger than about 30 km.