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2015 ; 5
(ä): 17075
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Petrologic Characteristics of the Lunar Surface
#MMPMID26611148
Wang X
; Pedrycz W
Sci Rep
2015[Nov]; 5
(ä): 17075
PMID26611148
show ga
Petrologic analysis of the lunar surface is critical for determining lunar
formation and evolution. Here, we report the first global petrologic map that
includes the five most important lunar lithological units: the Ferroan
Anorthositic (FAN) Unit, the Magnesian Suite (MS) Unit, the Alkali Suite (AS)
Unit, the KREEP Basalt (KB) Unit and the Mare Basalt (MB) Unit. Based on the
petrologic map and focusing on four long-debated and important issues related to
lunar formation and evolution, we draw the following conclusions from the new
insights into the global distribution of the five petrologic units: (1) there may
be no petrogenetic relationship between MS rocks and KB; (2) there may be no
petrogenetic link between MS and AS rocks; (3) the exposure of the KREEP
component on the lunar surface is likely not a result of MB volcanism but is
instead mainly associated with the combined action of plutonic intrusion, KREEP
volcanism and celestial collision; (4) the impact size of the South Pole-Aitken
basin is constrained, i.e., the basin has been excavated through the whole crust
to exhume a vast majority of lower-crustal material and a very limited mantle
components to the lunar surface.