| タイトル | Characterization of potential sources of magnetic anomalies within the crust in a tectonically active region: Amphibolites and migmatites from Potrillo Maar, New Mexico |
| 本文（外部サイト） | http://hdl.handle.net/2060/19860011523 |
| 著者（英） | Padovanni, E.; Spear, F. S. |
| 著者所属（英） | Massachusetts Inst. of Tech. |
| 発行日 | 1985-12-02 |
| 言語 | eng |
| 内容記述 | The purpose was to characterize the oxide mineralogy and petrology of samples collected from Potrillo Maar, New Mexico with the goal of explaining the magnetic anamoly that is observed over this region from remote sensing. Potrillo Maar is a diatreme that has brought rocks from all depths in the crust to the surface almost instantaneously. The samples are therefore thought to be representative of the crust as it exists today below this portion of the Rio Grande Rift. It is generally believed that oxide minerals (magnetite, hematite, etc.) are responsible for the magnetic signature of the crust. The samples from Portillo Maar therefore offer a unique opportunity to examine the magnetic mineralogy of the entire crust. The results indicate that the magnetic anamoly observed over Rio Grande Rift may be consequence of the tectonic activity that caused mylonitization of the rocks and allowed the infiltration of oxidizing fluids. |
| NASA分類 | GEOPHYSICS |
| レポートNO | 86N20994
NAS 1.26:176385
NASA-CR-176385 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/154614 |
