Mineralogy of a mudstone at Yellowknife Bay, Gale crater, Mars.
نویسندگان
چکیده
Sedimentary rocks at Yellowknife Bay (Gale crater) on Mars include mudstone sampled by the Curiosity rover. The samples, John Klein and Cumberland, contain detrital basaltic minerals, calcium sulfates, iron oxide or hydroxides, iron sulfides, amorphous material, and trioctahedral smectites. The John Klein smectite has basal spacing of ~10 angstroms, indicating little interlayer hydration. The Cumberland smectite has basal spacing at both ~13.2 and ~10 angstroms. The larger spacing suggests a partially chloritized interlayer or interlayer magnesium or calcium facilitating H2O retention. Basaltic minerals in the mudstone are similar to those in nearby eolian deposits. However, the mudstone has far less Fe-forsterite, possibly lost with formation of smectite plus magnetite. Late Noachian/Early Hesperian or younger age indicates that clay mineral formation on Mars extended beyond Noachian time.
منابع مشابه
Synthesis of Akaganeite in the Presence of Sulfate: Implications for Akaganeite Formation in Yellowknife Bay, Gale Crater, Mars
Introduction: Akaganeite (β-FeOOH) is an Fe(III) (hydr)oxide with a tunnel structure usually occupied by chloride. Akaganeite has been recently discovered in a mudstone on the surface of Mars by the Chemistry and Mineralogy (CheMin) and Sample Analysis at Mars (SAM) instruments onboard the Mars Science Laboratory (MSL) Curiosity Rover in Gale crater [1, 2]. Akaganeite was detected together with...
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, (2014); 343 Science et al. D. T. Vaniman Mineralogy of a Mudstone at Yellowknife Bay, Gale Crater, Mars This copy is for your personal, non-commercial use only. clicking here. colleagues, clients, or customers by , you can order high-quality copies for your If you wish to distribute this article to others here. following the guidelines can be obtained by Permission to republish or repurpose ...
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COVER Eroded landscape of Yellowknife Bay, Gale crater on Mars. Sheepbed mudstone is seen in the foreground, ~4 meters distant from the Curiosity rover camera that took the photo; Gillespie sandstone is in the middle fi eld. The foothills of Mt. Sharp (upper left), ~20 kilometers distant, are Curiosity’s ultimate destination. Exploration of this region by the Curiosity rover offers evidence of ...
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ورودعنوان ژورنال:
- Science
دوره 343 6169 شماره
صفحات -
تاریخ انتشار 2014