Mathematics – Logic
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusmmb52a..02c&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #MB52A-02
Mathematics
Logic
6250 Moon (1221), 1009 Geochemical Modeling (3610, 8410), 1026 Composition Of The Moon, 1065 Major And Trace Element Geochemistry, 1094 Instruments And Techniques
Scientific paper
Lunar exploration requires studies using standardized testing procedures. Previous lunar simulants focused on physical aspects of the lunar regolith. Renewed lunar exploration requires standardized lunar regolith simulant (SLRS) materials that simulate the physical, chemical, and mineralogical properties of the regolith [1]. A root simulant models an end-member, and a derivative is formed by addition of material [2]. The 2005 Workshop recommended a low-Ti mare basalt and a high-Ca highland anorthosite set of roots. Derivatives involve addition of ilmenite and glassy agglutinates [3]. An ideal SLRS material is homogeneous. Geochemical standards are finely-ground to reduce chemical variability, but lunar simulants have a grain size variation and mineralogy that must match the lunar regolith. The simulant homogeneity is monitored using major, minor, and trace element data of progressively smaller samples compared to bulk material. Both chemical and geotechnical properties depend on the contrast from grain to grain. The variability of simulant material is an inherent property that must be taken into account. Simulant production requires monitoring of adherence to simulant requirements and homogeneity during production. Quality control establishes a traceability to a master set of reference standards. [1] Sibille L. and Carpenter P. (2005) Lunar Regolith Simulant Materials:Recommendations for Standardization Production and Usage. NASA TM. [2] Carter J., et al. (2004) Space Resources Roundtable VI, 15. [3] Taylor L. et al. (2004) Space Resources Roundtable VI, 46.
Carpenter Paul
Meeker G.
Sibille Laurent
Wilson Stephen
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