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火星和月球上的子来自火星和月球石

Frédéric Girault¹, Ludovic Ferrière^2,3, Carine Sadaka^4,5

¹Université Paris Cité, Institut de Physique du Globe de Paris, CNRS, F-75005, Paris, France. girault@ipgp.fr.

Scientific reports

|January 28, 2025

概括

-222,一个关键的痕迹气体,可以揭示行星岩石物理. 对火星和月球石的测量为这些天体提供了关键的源条款,为未来的太空任务提供了信息.

科学领域:

*行星科学 *行星科学
* 地质化学 * 地质化学
*放射性同位素地球化学 *放射性同位素地球化学

背景情况:

*拉-222是一种放射性气体,在地球系统中用作标记物.
* 它作为在外星环境中岩石物理学的追踪器的潜力,特别是涉及水,是公认的,但由于样本的有限可用性而受到限制.
*了解子在其他行星上的行为对于解释地质过程和潜在的可居住性至关重要.

研究的目的:

*测量火星和月球石中的有效-226度 (EC_Ra),以确定源条件.
* 实验性评估陆地变化的EC_Ra及其温度敏感性的影响.
* 估计火星和月球的表面流量,并将其与地球的值进行比较.

主要方法:

* 测量了6颗火星和9颗月球石中的有效-226度 (EC_Ra).
*对这些石的子辐射系数进行实验性确定.
* 基于石数据的表面流量计算.

主要成果:

确定了火星和月球石的EC_Ra值,通常低于陆地岩石,但与其他石和原始玄武岩石相似.
* 火星石的辐射系数为2.117%,月球石为0.4311%.
* 火星和月球的平均估计表面流量明显低于地球.

结论:

* 石分析为火星和月球上的辐射过程提供了必要的限制.
* 衍生出的源术语对于解释这些天体当前和未来的现场测量非常有价值.
*这项研究为在地球外地质和大气研究中使用作为标记物奠定了基础.

关键词:

有效度的有效度.排放系数的排放系数是什么地球外的外星环境火星和月球上的石.拉登的流量和度是什么地球上的变化.

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