{"id":162,"date":"2013-09-25T16:42:32","date_gmt":"2013-09-25T16:42:32","guid":{"rendered":"https:\/\/staffblogs.le.ac.uk\/mars\/2013\/09\/25\/25th-september-2013-sol-404\/"},"modified":"2025-02-26T13:28:38","modified_gmt":"2025-02-26T13:28:38","slug":"25th-september-2013-sol-404","status":"publish","type":"post","link":"https:\/\/staffblogs.le.ac.uk\/mars\/2013\/09\/25\/25th-september-2013-sol-404\/","title":{"rendered":"25th September 2013 Sol 404"},"content":{"rendered":"<p>We have now left Waypoint Point 1\u00a0and started out for Waypoint 2, at about 1 km distance.\u00a0<\/p>\n<p>At Leicester University and the Open University (Dr Susanne Schwenzer) we are busy preparing a paper which uses a variety of ChemCam, CheMin, APXS data to work out the processes and conditions (T, fluid composition, pH etc.) that the alteration minerals at Yellowknife Bay experienced.\u00a0 Its a big challenge but fascinating.\u00a0 By knowing the thermodynamic properties of the minerals we can backtrack though modelling and terrestrial analogues to what went on with water in Gale Crater about 4 Gyr.\u00a0 The calculated fluids can then be\u00a0used to\u00a0understand other secondary assemblages that we encounter on the way to, and at, Mt. Sharp.<\/p>\n<p>The image shows an example of\u00a0\u00a0the minerals that would\u00a0precipitate from a likely alteration fluid at a variety of water to rock ratios (W\/R).\u00a0 They are similar to the minerals identified in the Sheepbed mudstone of Yellowknife Bay.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>We have now left Waypoint Point 1\u00a0and started out for Waypoint 2, at about 1 km distance.\u00a0 At Leicester University and the Open University (Dr Susanne Schwenzer) we are busy preparing a paper which uses a variety of ChemCam, CheMin, APXS data to work out the processes and conditions (T, fluid composition, pH etc.) that [&hellip;]<\/p>\n","protected":false},"author":273,"featured_media":403,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-162","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/staffblogs.le.ac.uk\/mars\/wp-json\/wp\/v2\/posts\/162","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/staffblogs.le.ac.uk\/mars\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/staffblogs.le.ac.uk\/mars\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/staffblogs.le.ac.uk\/mars\/wp-json\/wp\/v2\/users\/273"}],"replies":[{"embeddable":true,"href":"https:\/\/staffblogs.le.ac.uk\/mars\/wp-json\/wp\/v2\/comments?post=162"}],"version-history":[{"count":1,"href":"https:\/\/staffblogs.le.ac.uk\/mars\/wp-json\/wp\/v2\/posts\/162\/revisions"}],"predecessor-version":[{"id":660,"href":"https:\/\/staffblogs.le.ac.uk\/mars\/wp-json\/wp\/v2\/posts\/162\/revisions\/660"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/staffblogs.le.ac.uk\/mars\/wp-json\/wp\/v2\/media\/403"}],"wp:attachment":[{"href":"https:\/\/staffblogs.le.ac.uk\/mars\/wp-json\/wp\/v2\/media?parent=162"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/staffblogs.le.ac.uk\/mars\/wp-json\/wp\/v2\/categories?post=162"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/staffblogs.le.ac.uk\/mars\/wp-json\/wp\/v2\/tags?post=162"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}