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Dynamic crystallization characteristics of enstatite chondrite chondrules
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lanier, A. B. Dehart, John M. Lofgren, Gary E. |
| Copyright Year | 1991 |
| Description | Although the chemical properties of enstatite and ordinary chondrites are distinctly different, they both contain chondrules with a similar array of textures. This similarity suggests like origins. Textural studies using chondrule compositions from ordinary chondrites suggest that these chondrules have an igneous origin: either by crystallization from melts or from partial melts of crystalline material. In contrast, the cathodoluminescence (CL) properties of the enstatite from enstatite chondrites were interpreted to mean that mechanical aggregation played an important part in their formation. An alternative interpretation of these CL properties, however, suggests that variations in the minor element content of the enstatite, a probable result of igneous fractionation processes, could also produce different CL colors. An attempt was made to evaluate the two models by performing dynamic crystallization experiments on an average enstatite chondrule composition and by looking at the resultant CL. The textures grown on experimentally crystallized E-chondrite melts confirm that formational processes are similar to those for the ordinary chondrites with the obvious exception of the oxidation state. |
| File Size | 111064 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920003705 |
| Archival Resource Key | ark:/13960/t6wx2997q |
| Language | English |
| Publisher Date | 1991-01-01 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Dynamic Characteristics Fractionation Enstatite Crystallization Meteoritic Composition Color Crystallinity Cathodoluminescence Textures Melts Crystal Growth Chondrites Oxidation Chemical Properties Chondrule Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
