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| ID No : | 600 Edit | Title: | Lunar Crustal Rocks Types, Global Distribution and Targeting |
| Summary / Review : | "The Apollo samples provide a first-order understanding of the makeup of the lunar crust - its composition, mineralogy, and rock types [1-3]. On the basis of these samples, much has been inferred about the conditions under which these materials formed within the crust as well as the early evolution of the Moon's crust and mantle. Crustal rocks are dominated by three silicate mineral groups: olivine, pyroxene, and plagioclase. Lunar rocks are virtually anhydrous and crystallized at low oxygen fugacity and relatively low pressure. The dominant igneous crustal rock types are thus anorthosite, norite, troctolite, and intermediate types (e.g., anorthositic norite). In lunar crustal rocks, low-Ca pyroxene (orthopyroxene and pigeonite) is more abundant than high-Ca pyroxene (augite) although gabbroic rocks do occur among the samples. Rocks enriched in alkali elements and phosphorous, including alkali anorthosite, alkali norite, alkali gabbronorite, monzogabbro, and granite, are not abundant but are found, especially in samples from the western Apollo sites. Owing to known physicochemical conditions of the lunar crust, these are the rock types expected to occur throughout the Moon's upper crust, even in locations not directly sampled. This inference is supported by the observed mineralogy of lunar meteorites, which arguably provide a random sampling of the Moon's near-surface rock types, and by mineralogical remote sensing of the lunar surface." (Author's abstract) |
| Author(s) : |
Jolliff, B. J., [Goddard Space Flight Center] |
| Publication Date: | 2009 |
| Category(s) : |
Exploration and resources / Lunar / Geology and resources |
| Progress Type: | A ( A=Analysis only, D=Design, T=Testing, C=Completed or Commercial product ) |
| Web URL : |
http://hdl.handle.net/2060/20110012799
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| PERMANENT code(s) : | L,U |
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| NTRS : | 20110012799 |
| Submitted by : | MEP |
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