scholarly journals Aqueous alteration of the Martian meteorite Northwest Africa 817: Probing fluid-rock interaction at the nakhlite launch site

2018 ◽  
Vol 53 (11) ◽  
pp. 2395-2412 ◽  
Author(s):  
M. R. Lee ◽  
L. Daly ◽  
B. E. Cohen ◽  
L. J. Hallis ◽  
S. Griffin ◽  
...  
Keyword(s):  
Aqueous Alteration ◽  
Rock Interaction ◽  
Martian Meteorite ◽  
Northwest Africa ◽  
Launch Site

scholarly journals Aqueous alteration in the Northwest Africa 817 (NWA 817) Martian meteorite

2002 ◽  
Vol 203 (1) ◽  
pp. 431-444 ◽  
Author(s):  
Ph. Gillet ◽  
J.A. Barrat ◽  
E. Deloule ◽  
M. Wadhwa ◽  
A. Jambon ◽  
...  
Keyword(s):  
Aqueous Alteration ◽  
Martian Meteorite ◽  
Northwest Africa

scholarly journals The Northwest Africa (NWA) 5790 meteorite: A mesostasis-rich nakhlite with little or no Martian aqueous alteration

2015 ◽  
Vol 50 (2) ◽  
pp. 287-304 ◽  
Author(s):  
Tim Tomkinson ◽  
Martin R. Lee ◽  
Darren F. Mark ◽  
Katherine J. Dobson ◽  
Ian A. Franchi
Keyword(s):  
Aqueous Alteration ◽  
Northwest Africa

scholarly journals Rhyolitic (Micrographic Granite) Igneous Clasts from Ancient Mars in the Martian Meteorite Northwest Africa 8171

2020 ◽  
Author(s):  
Miles Lindner ◽  
Axel K. Schmitt ◽  
Alexander N. Krot ◽  
Frank E. Brenker
Keyword(s):  
Martian Meteorite ◽  
Northwest Africa

scholarly journals Noble gases in the Martian meteorite Northwest Africa 2737: A new chassignite signature

2006 ◽  
Vol 41 (5) ◽  
pp. 739-748 ◽  
Author(s):  
Bernard MARTY ◽  
Veronika S. HEBER ◽  
Ansgar GRIMBERG ◽  
Rainer WIELER ◽  
Jean-Alix BARRAT
Keyword(s):  
Noble Gases ◽  
Martian Meteorite ◽  
Northwest Africa

scholarly journals Formation and loss of metastable brucite: does Fe(II)-bearing brucite support microbial activity in serpentinizing ecosystems?

2020 ◽  
Vol 378 (2165) ◽  
pp. 20180423 ◽  
Author(s):  
A. S. Templeton ◽  
E. T. Ellison
Keyword(s):  
Ultramafic Rocks ◽  
Earth System ◽  
Aqueous Alteration ◽  
Rock Interaction ◽  
Secondary Minerals ◽  
Dissolved Carbon ◽  
The Earth ◽  
Reaction Zones ◽  
Water Rock Interaction

Ultramafic rocks undergo successive stages of hydration and oxidation during water/rock interaction, giving rise to secondary minerals such as brucite, serpentine, magnetite and the production of H 2(g) . Ferroan brucite ( M g x Fe ( 1 − x ) 2 + ( OH ) 2 ) often forms under low water/rock ratios early during the ‘serpentinization’ process. The formation of ferroan brucite sequesters Fe(II) and suppresses the production of H 2 , thereby limiting the flux of reductants suitable for sustaining microbial metabolism. Yet ferroan brucite is a relatively soluble mineral ‘reservoir’ for reactive Fe(II). Brucite is often metastable and can be lost at later stages of peridotite hydration when there is a significant increase in the water/rock ratio or the activity of SiO 2 or CO 2 . The Fe(OH) 2 component of brucite has the thermodynamic potential to reduce most aqueous oxidants. Therefore, ferroan brucite may reduce water and/or dissolved carbon, nitrogen and sulfur species, while the Fe(II) is converted into more stable secondary minerals such as Fe(II/III)-oxides and hydroxides (e.g. green-rust, magnetite, iowaite and pyroaurite) and ferric serpentine. The reactivity of ferroan brucite, and the associated rate of Fe solubilization and oxidation in subsurface fluids, could be a key regulator on the rate of electron transfer from serpentinites to the rock-hosted biosphere. Aqueous alteration of ferroan brucite may significantly modulate the H 2 activity in fluids circulating within partially serpentinized rocks, and buffer H 2 as it is lost by advection or in situ consumption by a hydrogenotrophic microbial community. Moreover, there may be microbial organisms that specifically colonize and use ferroan brucite as an electron donor for their metabolism. The energy fluxes sustained by localized brucite oxidation may often be sufficiently large to sustain abundant microbial communities; water/rock reaction zones where brucite is consumed could serve as environments to search for extant or fossil serpentinite-hosted life. This article is part of a discussion meeting issue ‘Serpentinite in the Earth System’.

The Northwest Africa 8159 (NWA 8159) Martian Meteorite Part 2. Spinel-orthopyroxene intergrowths. A record of fO2 and crust-basalt interactions

2019 ◽  
Vol 258 ◽  
pp. 242-257 ◽  
Author(s):  
Charles K. Shearer ◽  
Aaron S. Bell ◽  
Christopher D.K. Herd ◽  
Paul V. Burger ◽  
Paula Provencio ◽  
...  
Keyword(s):  
Martian Meteorite ◽  
Northwest Africa

scholarly journals The age of the martian meteorite Northwest Africa 1195 and the differentiation history of the shergottites

2008 ◽  
Vol 72 (6) ◽  
pp. 1696-1710 ◽  
Author(s):  
Steven J.K. Symes ◽  
Lars E. Borg ◽  
Charles K. Shearer ◽  
Anthony J. Irving
Keyword(s):  
Martian Meteorite ◽  
Northwest Africa ◽  
History Of

Probing the chemical and mineralogical characteristics of the Martian meteorite NWA 7397 through μRaman and μXRF non-destructively

2018 ◽  
Vol 18 (1) ◽  
pp. 73-78 ◽  
Author(s):  
Bruno Leonardo do Nascimento-Dias ◽  
Douglas Galante ◽  
Davi Oliveira ◽  
Marcelino Anjos
Keyword(s):  
Analytical Techniques ◽  
Martian Meteorite ◽  
Northwest Africa ◽  
Geological Processes ◽  
Mineralogical Characteristics ◽  
Martian Meteorites ◽  
History Of ◽  
Non Destructive

AbstractMartian meteorites have valuable information about past geological processes on Mars. In this particular case, the sample used was the Martian meteorite Northwest Africa (NWA) 7397. The main objective was to conduct preliminary analyses of the sample that was able to provide mineralogical characteristics in a non-destructive way. These meteorite NWA 7397 analyses were performed using two analytical techniques, μRaman and μXRF. Through the techniques used it was possible to suggest the presence of chromite, ilmenite, magnetite and forsterite minerals. These minerals seem to have a correspondence to one another in relation to the process that formed them. Thus, the information generated by these analytical techniques can contribute significantly by providing information on the history of Mars in order to have relevance to the areas of Astrobiology and Planetary Sciences.

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