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Major element composition of Luna 20 glasses. (1972)

Reid, A. M. ; Warner, J. ; Ridley, W. I. ; [et al.]

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Publication Date: 2019-06-27

Description: Ten per cent of the 50 to 150-micron size fraction of Luna 20 soil is glass. A random suite of 270 of these glasses has been analyzed by electron microprobe techniques. The major glass type forms a strong cluster around a mean value corresponding to Highland basalt (anorthositic gabbro) with 70% normative feldspar. Minor glass groups have the compositions of mare basalts and of low-K Fra Mauro type basalts. The glass data indicate that Highland basalt is the major rock type in the highlands north of Mare Fecunditatis.

Keywords: CHEMISTRY

Type: Earth and Planetary Science Letters; 17; Dec. 197

Format: text

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