Chemical variability and origin of agglutinitic glass

Details Chemical variability and origin of agglutinitic glass Chemical variability and origin of agglutinitic glass

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985lpsc...16...87b&link_type=abstract

(Lunar and Planetary Institute, NASA, American Geophysical Union, et al., Lunar and Planetary Science Conference, 16th, Houston,

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Agglutination, Glass, Lunar Composition, Aluminum Oxides, Calcium Oxides, Chemical Composition, Electron Microscopy, Iron Oxides, Magnesium Oxides, Moon, Chemistry, Origin, Glass, Agglutinates, Vesicles, Clasts, Sem, Electron Microscopy, Samples, Lunar, Electron Probe Methods, Analysis, X-Ray Methods, Edxa, Apollo Missions, Landing Sites, Composition, Soil, Models, Fusion, Description, Melting, Formation, Impacts, Homogeneity, Micrometeorites, Bombardment, Procedure

Scientific paper

Over 600 energy dispersive X-ray analyses of pure glass in 32 large agglutinates from five different Apollo landing sites were performed, and the results are reported and discussed. Some agglutinates are found to contain remarkably homogeneous glass; these agglutinates tend to be optically homogeneous as well. Many of the more complex agglutinates contain glass domains that are relatively homogeneous but differ in composition from other domains in the same agglutinates. The variation in composition of different domains within a single agglutinate can exceed variation among average compositions of different agglutinates in a soil. The composition of individual glass domains is not generally on the line between the composition of a bulk soil and the composition of the finest size fractions of that soil. The average composition of all agglutinate domains in a soil lies close to that line and close to the composition of the finest fraction, in support of the F3 and similar models.

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