The Viking X ray fluorescence experiment - Sampling strategies and laboratory simulations

Details The Viking X ray fluorescence experiment - Sampling strategies and laboratory simulations The Viking X ray fluorescence experiment - Sampling strategies and laboratory simulations

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.4595b&link_type=abstract

Journal of Geophysical Research, vol. 82, Sept. 30, 1977, p. 4595-4624.

Physics

11

Mars Surface Samples, Planetary Composition, Spectroscopic Analysis, Viking Mars Program, X Ray Fluorescence, Chemical Analysis, Ground Support Systems, Mission Planning, Simulation

Scientific paper

Ten samples of Mars regolith material (six on Viking Lander 1 and four on Viking Lander 2) have been delivered to the X ray fluorescence spectrometers as of March 31, 1977. An additional six samples at least are planned for acquisition in the remaining Extended Mission (to January 1979) for each lander. All samples acquired are Martian fines from the near surface (less than 6-cm depth) of the landing sites except the latest on Viking Lander 1, which is fine material from the bottom of a trench dug to a depth of 25 cm. Several attempts on each lander to acquire fresh rock material (in pebble sizes) for analysis have yielded only cemented surface crustal material (duricrust). Laboratory simulation and experimentation are required both for mission planning of sampling and for interpretation of data returned from Mars. This paper is concerned with the rationale for sample site selections, surface sampler operations, and the supportive laboratory studies needed to interpret X ray results from Mars.

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