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Related Experiment Video

Updated: Jul 12, 2026

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

Published on: July 30, 2020

Lunar anorthosites.

J A Wood, J S Dickey, U B Marvin

Science (New York, N.Y.)

|January 30, 1970

Summary

This summary is machine-generated.

Lunar anorthosites, distinct from mare basalts, suggest highlands origin from impact ejecta. A proposed model features an anorthosite crust over gabbro, with maria forming from lava upwelling through crustal breaches.

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Simulation of the Planetary Interior Differentiation Processes in the Laboratory

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Published on: November 15, 2013

Area of Science:

Lunar geology
Planetary science
Petrology

Background:

Lunar rock analysis reveals distinct anorthosite fragments among mare basalts and soil breccias.
Anorthosites exhibit unique compositional, color, and specific gravity properties.
Surveyor 7 analysis of Tycho ejecta shows compositional similarities to these anorthosites.

Purpose of the Study:

To identify and characterize lunar anorthosites.
To propose a structural model for the Moon's crust and maria.
To explain the origin of anorthosites and their relationship to lunar surface features.

Main Methods:

Examination of 1676 lunar rock fragments.
Compositional analysis of lunar samples.
Comparison with existing data from lunar missions (e.g., Surveyor 7).

Main Results:

Sixty-one anorthosite fragments were identified, differing significantly from other lunar materials.
Anorthosites are proposed as samples of lunar highlands material ejected by impacts.
A lunar structural model suggests a 25-km anorthosite crust floating on gabbro.

Conclusions:

Anorthosites likely represent primordial lunar crustal material.
The proposed model explains the formation of maria as basaltic lava filling impact breaches.
Mascons are considered within the context of this crustal model.