{"id":23887,"date":"2020-09-23T06:46:00","date_gmt":"2020-09-23T04:46:00","guid":{"rendered":"http:\/\/karmaka.de\/?p=23887"},"modified":"2020-09-25T14:26:21","modified_gmt":"2020-09-25T12:26:21","slug":"copper-in-ordinary-chondrites-proxies-for-resource-potential-of-asteroids-and-constraints-for-minimum-invasive-and-economically-efficient-exploitation","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=23887","title":{"rendered":"Copper in ordinary chondrites: Proxies for resource potential of asteroids and constraints for minimum-invasive and economically efficient exploitation<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Katarzyna \u0141uszczek, Agata M. Krzesi\u0144ska<\/p>\n\n\n\n<p>Planetary and Space Science<br>In Press, Journal Pre-proof, Available online 22 September 2020<\/p>\n\n\n\n<p><a rel=\"noreferrer noopener\" href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0032063320303056\" target=\"_blank\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p>&#8220;Highlights<\/p>\n\n\n\n<p>\u2022 S-type asteroids contain 70-100 ppm Cu, in FeNi-alloy and native-Cu mineral.<br>\u2022 Native copper forms due to shock and post-shock processes.<br>\u2022 Shock-darkened asteroids may host significant amount of native Cu.<br>\u2022 Cu leaching from FeNi-metal is impractical, but native Cu can be extracted by mechanical processing.<br>\u2022 Studies of shock-driven metal redistribution may provide new perspectives for more targeted asteroid exploitation.&#8221;<\/p>\n\n\n\n<p class=\"justify-text\">&#8220;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.<\/p>\n\n\n\n<p class=\"justify-text\">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.<\/p>\n\n\n\n<p class=\"justify-text\">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.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Katarzyna \u0141uszczek, Agata M. Krzesi\u0144ska Planetary and Space ScienceIn Press, Journal Pre-proof, Available online 22 September 2020 LINK (OPEN ACCESS) &#8220;Highlights \u2022 S-type asteroids contain 70-100 ppm Cu, in FeNi-alloy and native-Cu mineral.\u2022 Native copper&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[78,7,3035],"tags":[1854,5721,277,1807,1673],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/23887"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=23887"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/23887\/revisions"}],"predecessor-version":[{"id":23889,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/23887\/revisions\/23889"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=23887"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=23887"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=23887"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}