Loading...
Please wait, while we are loading the content...
Similar Documents
A chemical model for lunar non-mare rocks (Document No: 19750006608)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Rhodes, J. M. Hubbard, N. J. |
| Copyright Year | 1974 |
| Description | Nearly all rocks returned from the moon are readily divided into three broad categories on the basis of their chemical compositions: (1) mare basalts, (2) non-mare rocks of basaltic composition (KREEP, VHA), and (3) anorthositic rocks. Only mare basalts may unambiguously be considered to have original igneous textures and are widely understood to have an igneous origin. Nearly all other lunar rocks have lost their original textures during metamorphic and impact processes. It is shown that for these rocks one must work primarily with chemical data in order to recognize and define rock groups and their possible modes of origin. Non-mare rocks of basaltic composition have chemical compositions consistent with an origin by partial melting of the lunar interior. The simplest origin for rocks of anorthositic chemical composition is the crystallization and removal of ferromagnesian minerals. It is proposed that the rock groups of anorthositic and non-mare basaltic chemical composition could have been generated from a single series of original but not necessarily primitive lunar materials. |
| File Size | 1103357 |
| Page Count | 44 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19750006608 |
| Archival Resource Key | ark:/13960/t1pg6fr13 |
| Language | English |
| Publisher Date | 1974-01-01 |
| Access Restriction | Open |
| Subject Keyword | Lunar And Planetary Exploration Lunar Maria Chemical Analysis Lunar Geology Basalt Igneous Rocks Chemical Composition Lunar Surface Lunar Rocks Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
