Lunar igneous rocks and the nature of the lunar interior

Details Lunar igneous rocks and the nature of the lunar interior Lunar igneous rocks and the nature of the lunar interior

Jul 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974map..confq...4h&link_type=abstract

Presented at Proc. of the Soviet-Am. Conf. on the Cosmochemistry of the Moon and Planets, Moscow, 4-8 Jun. 1974

Physics

Igneous Rocks, Lunar Geology, Lunar Rocks, Lunar Surface, Chemical Analysis, Lunar Crust, Lunar Landing Sites, Lunar Magnetic Fields, Minerals

Scientific paper

Lunar igneous rocks are interpreted, which can give useful information about mineral assemblages and mineral chemistry as a function of depth in the lunar interior. Terra rocks, though intensely brecciated, reveal, in their chemistry, evidence for a magmatic history. Partial melting of feldspathic lunar crustal material occurred in the interval 4.6 to 3.9 gy. Melting of ilmenite-bearing cumulates at depths near 100 km produced parent magmas for Apollo 11 and 17 titaniferous mare basalts in the interval 3.8 to 3.6 gy. Melting of ilmenite-free olivine pyroxenites at depths greater than 200 km produced low-titanium mare basalts in the interval 3.4 to 3.1 gy. No younger igneous rocks have yet been recognized among the lunar samples and present-day melting seems to be limited to depths greater than 1000 km.

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