Geochronologic and Isotropic Constraints on Thermal and Mechanical Models of Lunar Evolution

Details Geochronologic and Isotropic Constraints on Thermal and Mechanical Models of Lunar Evolution Geochronologic and Isotropic Constraints on Thermal and Mechanical Models of Lunar Evolution

Jan 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998nvmi.conf...67s&link_type=abstract

Workshop on New Views of the Moon: Integrated Remotely Sensed, Geophysical, and Sample Datasets, p. 67

Mathematics

Logic

Geochemistry, Geochronology, Lunar Evolution, Lunar Mantle, Magma, Moon, Lunar Composition, Lunar Geology, Lunar Surface, Selenology, Anorthosite, Mineralogy, Remote Sensing, Spectroscopy, Kreep, Basalt, Lunar Maria

Scientific paper

Both short-lived and long-lived geochronometers are key to our understanding of the thermal and mechanical evolution of planets and satellites. These isotopic studies not only allow us to set time constraints on various processes (core formation, melting, crystallization, impact), but also allow us to determine the chemical and mineralogic characteristics of plausible sources. Thermal and mechanical models derived from remote spectroscopy and geophysical data must be tempered by such studies. We present three case studies where the ground truth afforded by radiogenic isotopic studies and geochronology have drastically changed (or should change) prevailing models determined from remote sensing and geophysics: (1) ferroan anorthosites (FANs) and the magma ocean hypothesis, (2) highlands plutonic-suite rocks and late KREEP formation from a magma ocean, and (3) high-Ti basalt sources and ilmenite-sinking in the lunar mantle In addition, we will mention several other outstanding problems in lunar petrology and geochemistry where remote sensing and geophysics could prove useful in cutting the Gordian knot.

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