The ferroan-anorthositic suite and the extent of primordial lunar melting

Details The ferroan-anorthositic suite and the extent of primordial lunar melting The ferroan-anorthositic suite and the extent of primordial lunar melting

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pcmo.work...72w&link_type=abstract

In Lunar and Planetary Inst., Workshop on the Physics and Chemistry of Magma Oceans from 1 Bar to 4 Mbar p 72-73 (SEE N92-28587

Physics

Crystallization, Geochemistry, Lunar Crust, Magma, Melting, Oceans, Planetary Evolution, Anomalies, Basalt, Iron Compounds, Models

Scientific paper

The Apollo highlands rock collection includes more than 100 'pristine' fragments that survived the intense meteoritic bombardment of the ancient lunar crust with unmixed, endogenously igneous compositions. The geochemical anomaly manifested by the 'ferroan-anorthositic suite' (FAS) appears to reflect a geochemical, and probably also a genetic, bimodality among the ancient lunar cumulates. Early models that purported to account for this bimodality as a product of a single magma have been discredited. The model of the present paper implies that the Mg-suite rocks formed by a comparatively normal variety of basaltic fractional crystallization (FC) shortly after the era of magma ocean (MO) crystallization and FAS genesis.

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