Elemental Geochemistry of Sedimentary Rocks at Yellowknife Bay, Gale Crater, Mars
Sedimentary rocks examined by the Curiosity rover at Yellowknife Bay, Mars, were derived from sources that evolved from an approximately average martian crustal composition to one influenced by alkaline basalts. No evidence of chemical weathering is preserved, indicating arid, possibly cold, paleocl...
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/35088 2024-01-14T10:11:22+01:00 Elemental Geochemistry of Sedimentary Rocks at Yellowknife Bay, Gale Crater, Mars McLennan, Scott M. Anderson, R.B. Bell, J.F. Briges, J.C. Calef , F. Campbell, J.L. Clark, B.C Clegg, S. Conrad, P Des Marais, D.J. Dromart, G King, Penelope http://hdl.handle.net/1885/35088 https://doi.org/10.1126/science.1244734 https://openresearch-repository.anu.edu.au/bitstream/1885/35088/5/King_P_2013_Elemental_Geochemistry.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/35088/7/01_McLennan_Elemental_Geochemistry_of_2013.pdf.jpg unknown American Association for the Advancement of Science 0036-8075 http://hdl.handle.net/1885/35088 doi:10.1126/science.1244734 https://openresearch-repository.anu.edu.au/bitstream/1885/35088/5/King_P_2013_Elemental_Geochemistry.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/35088/7/01_McLennan_Elemental_Geochemistry_of_2013.pdf.jpg Science Journal article ftanucanberra https://doi.org/10.1126/science.1244734 2023-12-15T09:33:25Z Sedimentary rocks examined by the Curiosity rover at Yellowknife Bay, Mars, were derived from sources that evolved from an approximately average martian crustal composition to one influenced by alkaline basalts. No evidence of chemical weathering is preserved, indicating arid, possibly cold, paleoclimates and rapid erosion and deposition. The absence of predicted geochemical variations indicates that magnetite and phyllosilicates formed by diagenesis under low-temperature, circumneutral pH, rock-dominated aqueous conditions. Analyses of diagenetic features (including concretions, raised ridges, and fractures) at high spatial resolution indicate that they are composed of iron- and halogen-rich components, magnesium-iron-chlorine - rich components, and hydrated calcium sulfates, respectively. Composition of a cross-cutting dike-like feature is consistent with sedimentary intrusion. The geochemistry of these sedimentary rocks provides further evidence for diverse depositional and diagenetic sedimentary environments during the early history of Mars. Article in Journal/Newspaper Yellowknife Australian National University: ANU Digital Collections Yellowknife Yellowknife Bay ENVELOPE(-114.336,-114.336,62.367,62.367) Science 343 6169 1244734 1244734 |
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Open Polar |
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Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
description |
Sedimentary rocks examined by the Curiosity rover at Yellowknife Bay, Mars, were derived from sources that evolved from an approximately average martian crustal composition to one influenced by alkaline basalts. No evidence of chemical weathering is preserved, indicating arid, possibly cold, paleoclimates and rapid erosion and deposition. The absence of predicted geochemical variations indicates that magnetite and phyllosilicates formed by diagenesis under low-temperature, circumneutral pH, rock-dominated aqueous conditions. Analyses of diagenetic features (including concretions, raised ridges, and fractures) at high spatial resolution indicate that they are composed of iron- and halogen-rich components, magnesium-iron-chlorine - rich components, and hydrated calcium sulfates, respectively. Composition of a cross-cutting dike-like feature is consistent with sedimentary intrusion. The geochemistry of these sedimentary rocks provides further evidence for diverse depositional and diagenetic sedimentary environments during the early history of Mars. |
format |
Article in Journal/Newspaper |
author |
McLennan, Scott M. Anderson, R.B. Bell, J.F. Briges, J.C. Calef , F. Campbell, J.L. Clark, B.C Clegg, S. Conrad, P Des Marais, D.J. Dromart, G King, Penelope |
spellingShingle |
McLennan, Scott M. Anderson, R.B. Bell, J.F. Briges, J.C. Calef , F. Campbell, J.L. Clark, B.C Clegg, S. Conrad, P Des Marais, D.J. Dromart, G King, Penelope Elemental Geochemistry of Sedimentary Rocks at Yellowknife Bay, Gale Crater, Mars |
author_facet |
McLennan, Scott M. Anderson, R.B. Bell, J.F. Briges, J.C. Calef , F. Campbell, J.L. Clark, B.C Clegg, S. Conrad, P Des Marais, D.J. Dromart, G King, Penelope |
author_sort |
McLennan, Scott M. |
title |
Elemental Geochemistry of Sedimentary Rocks at Yellowknife Bay, Gale Crater, Mars |
title_short |
Elemental Geochemistry of Sedimentary Rocks at Yellowknife Bay, Gale Crater, Mars |
title_full |
Elemental Geochemistry of Sedimentary Rocks at Yellowknife Bay, Gale Crater, Mars |
title_fullStr |
Elemental Geochemistry of Sedimentary Rocks at Yellowknife Bay, Gale Crater, Mars |
title_full_unstemmed |
Elemental Geochemistry of Sedimentary Rocks at Yellowknife Bay, Gale Crater, Mars |
title_sort |
elemental geochemistry of sedimentary rocks at yellowknife bay, gale crater, mars |
publisher |
American Association for the Advancement of Science |
url |
http://hdl.handle.net/1885/35088 https://doi.org/10.1126/science.1244734 https://openresearch-repository.anu.edu.au/bitstream/1885/35088/5/King_P_2013_Elemental_Geochemistry.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/35088/7/01_McLennan_Elemental_Geochemistry_of_2013.pdf.jpg |
long_lat |
ENVELOPE(-114.336,-114.336,62.367,62.367) |
geographic |
Yellowknife Yellowknife Bay |
geographic_facet |
Yellowknife Yellowknife Bay |
genre |
Yellowknife |
genre_facet |
Yellowknife |
op_source |
Science |
op_relation |
0036-8075 http://hdl.handle.net/1885/35088 doi:10.1126/science.1244734 https://openresearch-repository.anu.edu.au/bitstream/1885/35088/5/King_P_2013_Elemental_Geochemistry.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/35088/7/01_McLennan_Elemental_Geochemistry_of_2013.pdf.jpg |
op_doi |
https://doi.org/10.1126/science.1244734 |
container_title |
Science |
container_volume |
343 |
container_issue |
6169 |
container_start_page |
1244734 |
op_container_end_page |
1244734 |
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1788066278657753088 |