Constraints on the Extent and Timing of Groundwater Diagenesis in the Burns Formation, Meridiani Planum
نویسندگان
چکیده
FORMATION, MERIDIANI PLANUM. S. M. McLennan, R. E. Arvidson, B. C. Clark, M. P. Golombek, J. P. Grotzinger, B. L. Jolliff, A. H. Knoll, S. W. Squyres, N. J. Tosca and the Athena Science Team. Dept. Geosciences, State University of New York, Stony Brook, NY, 11794-2100 ([email protected]); Dept. Earth & Planetary Sciences, Washington University, St. Louis, MO, 63130; Lockheed Martin Corporation, Littleton, CO, 80127; Jet Propulsion Lab, California Institute of Technology, Pasadena, CA; Div. Geological & Planetary Sciences, California Institute of Technology, Pasadena, CA, 91125; Dept. Organismic & Evolutionary Biology, Harvard University, Cambridge, MA, 02138; Dept. Astronomy, Cornell University, Ithaca, NY, 14852.
منابع مشابه
Spatial Grain Size Sorting in Eolian Ripples and Estimation of Wind Conditions on Planetary Surfaces: Application to Meridiani Planum, Mars
The landscape seen by the Mars Exploration Rover (MER) Opportunity at Meridiani Planum is dominated by eolian (wind-blown) ripples with concentrated surface lags of hematitic spherules and fragments. These ripples exhibit profound spatial grain size sorting, with well-sorted coarse-grained crests and poorly sorted, generally finer-grained troughs. These ripples were the most common bed form enc...
متن کاملHematitic concretions at Meridiani Planum, Mars: Their growth timescale and possible relationship with iron sulfates
Using diffusion-based models for concretion growth, we calculate growth times of hematitic concretions that have been found in the Burns formation at Meridiani Planum, Mars, by NASA's Opportunity Mars Exploration Rover. Growth times of ~350–1900 terrestrial years are obtained for the observed size range of the concretions over a range of parameters representing likely diagenetic conditions and ...
متن کاملProvenance and diagenesis of the evaporite-bearing Burns formation, Meridiani Planum, Mars
Impure reworked evaporitic sandstones, preserved on Meridiani Planum, Mars, are mixtures of roughly equal amounts of altered siliciclastic debris, of basaltic provenance (40F10% by mass), and chemical constituents, dominated by evaporitic minerals (jarosite, Mg-, Ca-sulfatesFchloridesFFe-, Na-sulfates), hematite and possibly secondary silica (60F10%). These chemical constituents and their relat...
متن کاملSedimentary rocks at Meridiani Planum: Origin, diagenesis, and implications for life on Mars
The MER rover Opportunity has carried out the first outcrop-scale investigation of ancient sedimentary rocks on Mars. The rocks, exposed in craters and along fissures in Meridiani Planum, are sandstones formed via the erosion and re-deposition of fine grained siliciclastics and evaporites derived from the chemical weathering of olivine basalts by acidic waters. A stratigraphic section more than...
متن کاملIs the Chemistry of the Bedrocks at Meridiani Planum Indicative of a Volcanic
Introduction: The Mars Exploration Rover Opportunity has obtained chemical and mineralogical data for exposed bedrocks at Meridiani Planum on Mars. In using these data to formulate a diagenetic model for the bedrocks, a clear distinction must be made between the primary inputs into the rocks and products of secondary processes. The chemical composition of the Meridiani bedrocks provides the mos...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2006