Metal grains in lunar rocks as indicators of igneous and impact processes

Anhedral metal grains of >micrometer size occur in many lunar rock types, including mare basalts, magnesian suite rocks (MGS), ferroan anorthosites (FAN), and impact melt rocks and breccias. Some metal grains are inherited from, or modified by, impactors striking the Moon into crustal materials....

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Bibliographic Details
Published in:Meteoritics & planetary science 2020-08, Vol.55 (8), p.n/a
Main Author: Day, James M. D.
Format: Article
Language:English
Subjects:
Basalt
Composition
Crystallization
Fractional crystallization
Fractionation
Ilmenite
Impact melts
Impactors
Lunar core
Lunar mantle
Lunar rocks
Magma
Metals
Moon
Nickel
Olivine
Plagioclase
Rocks
Titanium
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Summary:Anhedral metal grains of >micrometer size occur in many lunar rock types, including mare basalts, magnesian suite rocks (MGS), ferroan anorthosites (FAN), and impact melt rocks and breccias. Some metal grains are inherited from, or modified by, impactors striking the Moon into crustal materials. These grains have high Ni/Co resulting from the addition of chondritic or iron impactors. Metal grains in mare basalts, FAN, and MGS have Ni/Co ranging from >20 to
ISSN:1086-9379
1945-5100
DOI:10.1111/maps.13544