SHOCK-INDUCED DEVOLATILIZATION OF CALCITE
SHOCK-INDUCED DEVOLATILIZATION OF CALCITE
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DOI：
10.1016/0012-821x(82)90049-8
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发表时间：
1982-01-01
影响因子：
5.3
通讯作者：
EPSTEIN, S
中科院分区：
文献类型：
--
作者：
BOSLOUGH, MB;AHRENS, TJ;EPSTEIN, S
使用新的气相冲击恢复技术和气源质谱法测定了方解石冲击压缩和减压至 18 GPa (180 kbar) 时释放的 CO2 和 CO 的量。数据表明，大约 0.03 至 0.3 摩尔%的方解石在冲击压力下挥发，该冲击压力显着低于连续介质热力学理论预测的挥发开始压力 (30 GPa)，并且与方解石和霰石的释放绝热数据定性一致。冲击释放的 CO2 中的碳和氧同位素比率与未冲击（热液）方解石中的碳和氧同位素比率相同，表明 CO2 来自方解石而不是其他潜在来源。
The amounts of CO2and CO evolved upon shock compression and decompression of calcite to 18 GPa (180 kbar) have been determined using a new gas phase shock recovery technique and gas source mass spectrometry. The data demonstrate that from ∼0.03 to 0.3 mole percent of calcite is devolatilized at shock pressures significantly lower than those predicted (30 GPa) for the onset of volatilization by continuum thermodynamic theory and are in qualitative agreement with release adiabat data for calcite and aragonite. Carbon and oxygen isotope ratios in the shock-released CO2are the same as those in the unshocked (hydrothermal) calcite, demonstrating that the CO2comes from the calcite rather than other potential sources.