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Spectroscopic and Geochemical Characterization of NWA 11421: Insights into Lunar Crust–Mantle Composition and Implications for Remote Sensing and Moon Exploration
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Spectroscopic and Geochemical Characterization of NWA 11421: Insights into Lunar Crust–Mantle Composition and Implications for Remote Sensing and Moon Exploration
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Journal Article
Spectroscopic and Geochemical Characterization of NWA 11421: Insights into Lunar Crust–Mantle Composition and Implications for Remote Sensing and Moon Exploration
2026
Overview
Lunar meteorites provide access to a geographically unconstrained record of the Moon, offering key insights into crustal diversity and interior evolution beyond the Apollo and Luna landing sites. Among them, the feldspathic breccia NWA 11421 is of particular interest because of its complex mineralogy and the presence of a dunite clast interpreted as a fragment of the lunar mantle. We present a non-destructive, multi-scale characterization of NWA 11421 using VIS–IR spectroscopy, µ-FTIR mapping, and µ-EDXRF. Results identify a polymict feldspathic breccia dominated by an anorthite matrix, with significant low-Ca pyroxene and olivine occurring as discrete mafic microdomains at the micro-scale. Near-infrared pyroxene band positions and Christiansen Feature (CF) value further indicate relatively mafic and primitive components. In addition, NWA 11421 CF value match with lunar crater-ejecta regions observed by the Diviner radiometer (LRO). These findings are consistent with a deep crustal or shallow mantle origin for NWA 11421 and may provide useful constraints for the selection of future landing sites, particularly in the context of ISRU-oriented human exploration, where mafic components are key sources of Fe and Mg.
Publisher
MDPI AG
