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首页> 外文期刊>Planetary and space science >Copper in ordinary chondrites: Proxies for resource potential of asteroids and constraints for minimum-invasive and economically efficient exploitation
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Copper in ordinary chondrites: Proxies for resource potential of asteroids and constraints for minimum-invasive and economically efficient exploitation

机译：普通铜矿中的铜：小行星资源潜力的代理和最小侵入性和经济有效的剥削的限制

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Ordinary chondrites originate from S-type asteroids. These meteorites can be used for laboratory studies that further our understanding of the geological conditions on asteroids, including assessment of their resource potential. Asteroids have since long been considered to host significant resources of siderophilic elements such as Fe, Ni, Co, Cu, that could be exploited in situ. However bulk rock mining would be largely impractical. In this paper, we report on abundance and mineral occurrences of copper in H chondrites, identify Cu carrier minerals and interpret their distribution in the context of processes that must have affected parent bodies. This leads us to suggestion that some parts of S-type asteroids contain Cu in a form and amount that would satisfy requirements of potentially economically and environmentally more efficient exploitation.Parent bodies of chondrites contain 70-100 ppm of Cu in bulk and this is mainly contained in Fe,Ni-alloy. However, parts of asteroids that were affected by shock processes and post-shock thermal annealing may host Cu that exsolved from primary alloy and forms native, pure-Cu grains. Up to 50 ppm of Cu may be present in such phase in these parts of asteroids. Grains of native copper can be extracted from the host rock via mechanical mineral processing methods, releasing need of extensive chemical leaching. This makes potential exploitation more targeted and less destructive for the local environment.A characteristic feature associated with enrichment in native Cu in chondrites is presence of shock-darkened zones. Therefore, we suggest that shock-darkened asteroids are potentially best sites for Cu exploitation.
机译：普通的软骨质源自S型小行星。这些陨石可用于实验室研究，进一步了解各小行星地质条件的理解，包括对其资源潜力的评估。小行星以来，长期以来一直被认为是举办诸如Fe，Ni，Co，Cu，铜的大量资源，这可能是原位利用的。然而，散装岩石采矿将在很大程度上是不切实际的。在本文中，我们报告了H Chondrites中铜的丰度和矿物质发生，鉴定Cu载体矿物质，并在必须具有影响父体的过程中解释它们的分布。这使我们提出建议S型小行星的某些部位以满足潜在经济和环境更有效的剥削的要求的形式和金额含量。群体含有70-100ppm的铜体，这主要是含有Fe，Ni-合金。然而，受冲击过程影响的小行星部分和休克后热退火的部分可以宿主宿主，其从原代合金中脱落并形成天然的纯-Cu颗粒。在各小行星的这些部分中，最多50ppm的Cu可以存在于这些相中。可以通过机械矿物加工方法从主体岩石中提取天然铜的颗粒，释放广泛的化学浸出。这使得潜在的利用更具针对性和对局部环境的破坏性较少。与富集在Chondrites的天然Cu中相关的特征是抗冲击区域的存在。因此，我们建议震荡黑暗的小行星是Cu剥削的最佳网站。

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