Detectability of Martian carbonates from orbit using thermal neutrons
作者:
W. C. Feldman,
B. M. Jakosky,
期刊:
Journal of Geophysical Research: Planets
(WILEY Available online 1991)
卷期:
Volume 96,
issue E1
页码: 15589-15598
ISSN:0148-0227
年代: 1991
DOI:10.1029/91JE00971
数据来源: WILEY
摘要:
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 specificatio
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