Physics
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9615589f&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Aug. 25, 1991, p. 15,589-15,598. Research supported by DOE and NASA.
Physics
5
Carbonates, Computerized Simulation, Mars Surface, Neutron Spectra, Thermal Neutrons, Calcium Carbonates, Gamma Ray Spectra, Magnesium Compounds, Regolith, Stratigraphy
Scientific paper
Numerical simulations of Martian neutron leakage flux spectra are made in order to explore the detectability of magnesium and calcium carbonate deposits using neutron spectroscopic techniques from orbit. The primary signature of such deposits is found to be an enhanced thermal amplitude. Although this enhancement is weakened by: (1) partial burial beneath an aeolian regolith blanket; (2) admixture with regolith on a microscopic (centimeter) or macroscopic (tens of centimeters) scale; and (3) reduction in the areal size of the deposit, near-surface stratigraphies of carbonates hypothesized by some authors as possible on Mars are still detectable by simple neutron sensors from orbit. However, the large variations in the magnitude of the thermal neutron enhancements caused by different carbonate deposit configurations found in this study require a combined gamma ray and neutron analysis for their unique specification.
Feldman William C.
Jakosky Bruce M.
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