Red Rock and Concretion Models for Earth and Mars: Teaching diagenesis

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Presentation transcript:

Red Rock and Concretion Models for Earth and Mars: Teaching diagenesis Sol 727 Marjorie A. Chan

GOAL: enhance sed learning using terrestrial and extraterrestrial comparisons Water in Meridiani Planum New, sense of discovery Building on terrestrial ideas Application to unknown setting Interdisciplinary Earth vs. Mars Pancam Microscopic Imager (MI) Rock Abrasion Tool (RAT) Image Credit: NASA/JPL/Arizona State University

CONCEPTS Sedimentolgy, stratigraphy, diagenesis Terrestrial analog ss color + concretions -> groundwater flow, host rock properties Compare to Mars Hematite: Fe2O3 Goethite: FeO(OH)

REGIONAL SETTING N Jurassic Outcrops

Reddening during early diagenesis, burial 3 step Utah model Grain scale Reddening during early diagenesis, burial Reducing fluids mobilize iron (Fe3+ ->Fe2+) 3. Concretions precipitate at oxidizing mixing front

Meridiani Planum MER Opportunity Christiansen et al 2001 Image Credits: NASA/JPL-Caltech

Outcrop Context Mars Utah Eagle Crater image credit: NASA/JPL/Cornell Utah Q: How does Fe distribution and weathering compare?

ACCUMULATIONS Mars Utah Q: How do accumulations compare? image credit: NASA/JPL/Cornell Q: How do accumulations compare?

IN SITU DISTRIBUTION Mars Utah image: NASA/JPL/Cornell Mars Utah Q: What does in situ distribution tell us? (Compared to other nodule deposits?)

Utah Mars DIFFERENT MORPHOLOGIES Mars images: NASA/JPL/Cornell 5 cm Q: What causes different shapes? Does size matter? Mars image credits: NASA/JPL/Cornell

Mars Utah Moessbauer Spectra Eagle Crater images: NASA/JPL/Cornell 1 cm Utah Q: What does mineralogy tell? Internal structure?

Mars “Microberries” Q: Why are there small sizes? Sol 633 images: NASA/JPL/Cornell Q: Why are there small sizes?

Mars Q: Which came first : spherules or lath-like moldic porosity? Sol 28 images: NASA/JPL/Cornell Q: Which came first : spherules or lath-like moldic porosity?

WHERE to get data? Context: Easy: Harder: Google Mars http://www.google.com/mars/ Teaching Visuals http://serc.carleton.edu/NAGTWorkshops/visualization/collections/mars.html Easy: MER Mission http://marsrovers.jpl.nasa.gov/home/index.html Press, Raw, Panorama, 3-D Harder: MER Analyst’s Notebook http://anserver1.eprsl.wustl.edu/

Given such examples, your ideas? Ways to use data? Specific projects? Particular outcomes? Skill sets? Other?