2009
DOI: 10.1016/j.epsl.2009.02.030
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Spectral, mineralogical, and geochemical variations across Home Plate, Gusev Crater, Mars indicate high and low temperature alteration

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Cited by 51 publications
(42 citation statements)
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“…NpOx, interpreted to be altered volcanic glass (Schmidt et al, 2009), is most abundant in the K-rich Backstay and HumboldtPeak classes (up to 13% of the Mössbauer spectral area), but is not abundant (4-6%) in the K-rich Irvine class rocks . Other rocks in Gusev Crater, such as those that make up Home Plate, have npOx contents that correlate with abundances of Cl or Zn (Schmidt et al, 2009), but this relation is not found in these basalts. Magnetite contents identified in the Mössbauer spectra among the CH basalts are anti-correlated with P 2 O 5 , perhaps suggesting combined phosphate dissolution and magnetite precipitation at rock surfaces.…”
Section: Comparing the Two Datasetsmentioning
confidence: 99%
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“…NpOx, interpreted to be altered volcanic glass (Schmidt et al, 2009), is most abundant in the K-rich Backstay and HumboldtPeak classes (up to 13% of the Mössbauer spectral area), but is not abundant (4-6%) in the K-rich Irvine class rocks . Other rocks in Gusev Crater, such as those that make up Home Plate, have npOx contents that correlate with abundances of Cl or Zn (Schmidt et al, 2009), but this relation is not found in these basalts. Magnetite contents identified in the Mössbauer spectra among the CH basalts are anti-correlated with P 2 O 5 , perhaps suggesting combined phosphate dissolution and magnetite precipitation at rock surfaces.…”
Section: Comparing the Two Datasetsmentioning
confidence: 99%
“…Some amount of alteration has affected all the basaltic classes since amorphous nanophase ferric oxide (npOx) accounts for a portion of their Mössbauer spectra (4% in Irvine to up to 13% in Backstay; Morris et al, 2006;. The npOx alteration is likely a product of local low temperature alteration , possibly derived by the oxidation and devitrification of volcanic glass (Schmidt et al, 2009).…”
Section: Gusev Basaltsmentioning
confidence: 99%
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“…De igual modo, los procesos de alteración hidrotermal como consecuencia de la interacción de los fluidos con los materiales volcánicos son de gran relevancia, ya que son capaces de generar minerales secundarios como óxidos y oxihidróxidos (Bustillo & Martínez-Frías, 2003;Rodríguez-Losada et al, 2000). Un ejemplo de estos procesos en el ámbito de la geología marciana es el caso del cráter Gusev, donde se ha detectado abundancia de olivino, y también de materiales de alteración (Schmidt et al, 2009;Mustard et al, 2008).…”
Section: Descripción Geológica De Los Afloramientosunclassified
“…En la Tabla 6 se presenta una recopilación de la mineralogía marciana en comparación con las especies minerales encontrada en los afloramientos de Tenerife estudiados (Chevrier, 2007;Schmidt et al, 2009, Bish et al, 2013. Los minerales detallados en la Tabla 6 han sido identificados tanto por los Rovers como a través de estudios realizados sobre meteoritos marcianos como los SNC (Shergotitas-NakhalitasChassignitas) (Bridges et al, 2001;Mittlefehldt, 1999).…”
Section: Espectroscopia Mössbauerunclassified