Detection of Copper by the ChemCam Instrument Along Curiosity's Traverse in Gale Crater, Mars: Elevated Abundances in Glen Torridon
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Detection of Copper by the ChemCam Instrument Along Curiosity's Traverse in Gale Crater, Mars : Elevated Abundances in Glen Torridon. / Goetz, Walter; Dehouck, Erwin; Gasda, Patrick J.; Johnson, Jeffrey R. ; Meslin, Pierre-Yves; Lanza, Nina L.; Wiens, Roger C.; Rapin, William; Frydenvang, Jens; Payré, Valerie; Gasnault, Olivier.
In: Journal of Geophysical Research: Planets, Vol. 128, No. 3, e2021JE007101, 2023.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Detection of Copper by the ChemCam Instrument Along Curiosity's Traverse in Gale Crater, Mars
T2 - Elevated Abundances in Glen Torridon
AU - Goetz, Walter
AU - Dehouck, Erwin
AU - Gasda, Patrick J.
AU - Johnson, Jeffrey R.
AU - Meslin, Pierre-Yves
AU - Lanza, Nina L.
AU - Wiens, Roger C.
AU - Rapin, William
AU - Frydenvang, Jens
AU - Payré, Valerie
AU - Gasnault, Olivier
PY - 2023
Y1 - 2023
N2 - Laser-Induced Breakdown Spectroscopy, as utilized by the ChemCam instrument onboard the Curiosity rover, detected enhanced abundances of the element copper. Since landing in Gale crater (August 6, 2012) 10 enhancements in copper abundance were observed during 3007 Martian days (sols) of rover operations and 24 km of driving (as of January 20, 2021). The most prominent ones were found in the Kimberley area on the crater floor (Aeolis Palus) and in Glen Torridon on the lower flanks of Aeolis Mons (Mt. Sharp). Enhancements in copper record the former existence of modestly acidic and oxidizing fluids, which were more oxidizing in Kimberley than in Glen Torridon. Of the two main types of bedrock in the lowest part of Glen Torridon, Mg-rich ‘coherent’ and K-rich ‘rubbly’ (named based on their outcrop expression), copper was only detected in coherent, not in rubbly bedrock. The difference between these two types of bedrock may be due to difference in provenance. Alternatively, based on a recently developed lacustrine-groundwater mixing model, we suggest that rubbly bedrock was altered by modestly acidic, shallow-subsurface lake water that leached out both copper and manganese, while coherent bedrock was affected by dominantly alkaline fluids which would be consistent with its mineralogical composition (including siderite) as returned by the CheMin instrument onboard the rover. Higher up in Glen Torridon, ChemCam data indicated significant gradients in copper concentration in coherent bedrock on a local scale of only few meters, which suggests a different alteration style and possibly different types of diagenetic fluids.
AB - Laser-Induced Breakdown Spectroscopy, as utilized by the ChemCam instrument onboard the Curiosity rover, detected enhanced abundances of the element copper. Since landing in Gale crater (August 6, 2012) 10 enhancements in copper abundance were observed during 3007 Martian days (sols) of rover operations and 24 km of driving (as of January 20, 2021). The most prominent ones were found in the Kimberley area on the crater floor (Aeolis Palus) and in Glen Torridon on the lower flanks of Aeolis Mons (Mt. Sharp). Enhancements in copper record the former existence of modestly acidic and oxidizing fluids, which were more oxidizing in Kimberley than in Glen Torridon. Of the two main types of bedrock in the lowest part of Glen Torridon, Mg-rich ‘coherent’ and K-rich ‘rubbly’ (named based on their outcrop expression), copper was only detected in coherent, not in rubbly bedrock. The difference between these two types of bedrock may be due to difference in provenance. Alternatively, based on a recently developed lacustrine-groundwater mixing model, we suggest that rubbly bedrock was altered by modestly acidic, shallow-subsurface lake water that leached out both copper and manganese, while coherent bedrock was affected by dominantly alkaline fluids which would be consistent with its mineralogical composition (including siderite) as returned by the CheMin instrument onboard the rover. Higher up in Glen Torridon, ChemCam data indicated significant gradients in copper concentration in coherent bedrock on a local scale of only few meters, which suggests a different alteration style and possibly different types of diagenetic fluids.
U2 - 10.1029/2021JE007101
DO - 10.1029/2021JE007101
M3 - Journal article
VL - 128
JO - Journal of Geophysical Research: Solid Earth
JF - Journal of Geophysical Research: Solid Earth
SN - 0148-0227
IS - 3
M1 - e2021JE007101
ER -
ID: 332602441