2 sequestration on Mars Adrienne Macartney amacartney1researchglaacuk School of Geographical amp Earth Sciences Cold icy Mars Warm wet Mars Modern Mars What caused the loss of the Mars atmosphere and hydrosphere ID: 1021539
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1. Crust-atmosphere coupling and CO2 sequestration on MarsAdrienne Macartney (a.macartney.1@research.gla.ac.uk)School of Geographical & Earth SciencesCold icy Mars?Warm wet Mars?Modern MarsWhat caused the loss of the Mars atmosphere and hydrosphere? Geology and engineering cross discipline project building an ultra-sonic rock polishing tool to discover insitu carbonation evidence on Mars. Investigating the role and scale of mineral carbonation via terrestrial analogues (ophiolites), chambered experiments and meteorite analysis.Fluctuating states of equilibrium?
2. CarbonationTriangleExposed ultra-basic rocksCO2Water
3. Exposed ultra-basic rocksCO2WaterHeat, 180°C optimalHyper - CarbonationSquare
4. Joys of Norwegian fieldwork in JanuaryMicro-carbonation Wide geographic scale Low water:rock ratio Relatively small amounts of sequestration ‘SNC’ style carbonate evidenceGlobal carbon sequestration TimeConceptual graph of carbonation dynamics (no units)AmazonianNoachian - HesperianSNC Mars MeteoritesShergottitesNakhlitesChassignites
5. Joys of Norwegian fieldwork in JanuaryPunctuated hyper-carbonationMicro-carbonation Wide geographic scale Low water:rock ratio Relatively small amounts of sequestration ‘SNC’ style carbonate evidence Highly geographically localised High water:rock ratio required Significant sequestration Deep sub-surface, density change, mineralogical evidenceGlobal carbon sequestration TimeAmazonianNoachian - HesperianConceptual graph of carbonation dynamics (no units)Blue = micro-carbonationRed = punctuated hyper-carbonation
6. Lafayette Mars meteorite dataALH 84001 studies to follow shortlyComparison with terrestrial Ophiolite weathering and replacement sequences (LOC and Oman)Testing micro-carbonation 1
7. Joys of Norwegian fieldwork in JanuaryTesting micro-carbonation 2
8. Joys of fieldwork in JanuaryLeka possesses the full ‘textbook’ sequence of ophiolite strataTesting micro-carbonation 2
9. The Leka Ophiolite Complex (LOC), NorwayFormed ~497Ma +/- 2Ma, part of the Skei group obducted in the Caledonian orogenyAnalogous to Mars mineral carbon sequestration?Is the water:rock ratio analogous?Testing micro-carbonation 2
10. Initial light microscopy:Extensive serpentinisation and antigorite replacementNumerous opaque minerals (chromite, magnetite)Minor carbonates in veinsTesting micro-carbonation 2
11. Prototyping an improved Mars rover toolRAT - Rock Abrasion ToolMOUSE – Micro-Optic Ultra-Sonic ExfoliatorSupported by: Space Glasgow, University of Glasgow Ultra-Sonic Planetary Drilling TeamPfeifferTesting micro-carbonation 3
12. SummaryWater on the Mars surface requires an atmosphere many bars higher than presentMineral carbon sequestration is a robust partial answer, supported by terrestrial analogues - Large scale surface micro-carbonation - Localised punctuated hyper-carbonation (CARBFIX analogue) 3. Comparative microscopic analysis between ophiolites and SNC meteorites may provide insight into important fluid and carbon sequestration processes on the Martian crust-atmosphere 4. Developing the MOUSE, a rover prototype ultra-sonic polisher to aid locating insitu evidence of carbon sequestration