Shock disturbance of the I‐XE system
Shock disturbance of the I‐XE system
复制标题
I-XE 系统的冲击干扰
DOI：
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发表时间：
1982
期刊：
影响因子：
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通讯作者：
T. Swindle
中科院分区：
文献类型：
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作者：
M. Caffee;C. Hohenberg;F. Horz;B. Hudson;B. M. Kennedy;F. Podosek;T. Swindle
Bjurbole陨石的三个独立样本被人为地在70kb、200kb和400kb的压力下受到冲击。对逐步加热中释放的氙的分析表明，400kb样品的I-Xe系统被冲击载荷大大改变，不再可能推断样品的年龄或捕获的氙组成。200 kb和70 kb样品的同位素结构变化逐渐减少，表明可能在自然系统中发现的激波扰动的梯度。本文还介绍了几种自然冲击陨石的I-Xe和/sup 40/Ar-/sup 39/Ar系统的解释。阿拉帕霍的新数据并没有证实之前报道的年龄和捕获的氙成分，而是表明它的I-Xe结构受到了强烈的冲击。
Three separate samples of the meteorite Bjurbole were artificially shocked at pressures of 70 kb, 200 kb, and 400 kb. Analysis of xenon released in stepwise heating shows that the I-Xe system of the 400 kb sample is substantially altered by the shock loading and it is no longer possible to infer an age or trapped xenon composition for that sample. The 200 kb and 70 kb samples display isotopic structures progressively less altered demonstrating the gradations in shock disturbance likely to be found in natural systems. Interpretations of the I-Xe and /sup 40/Ar-/sup 39/Ar systems for several naturally shocked meteorites are also presented. New data for Arapahoe do not confirm the previously reported age and trapped xenon composition, demonstrating instead that its I-Xe structure has been strongly disturbed by shock.