Mössbauer studies of impactites from Huamalies province in Huanuco Region |
| |
Authors: | A Bustamante S Espinoza G Morales R B Scorzelli |
| |
Institution: | (1) Faculty of Physical Sciences, San Marcos University, P.O. Box 14-0149, Lima, 14, Peru;(2) Museo de Historia Natural(Museum of Natural History), Ave. Arenales 1251, Jesús Maria, Peru;(3) Centro Brasileiro de Pesquisas Físicas (Brazilian Center for Research in Physics), Rua Dr. Xavier Sigaud 150, Rio de Janeiro, Brazil |
| |
Abstract: | This report is about the X-ray diffraction and Mössbauer studies of three impactite samples denominated PMe-8, PMe-9 and PMe-11 from Huamalies Province in Huánuco Region, Peru. When terrestrial rocks are submitted to pressures higher than 60 GP, the majority is completely melted, forming a kind of glass called impactites. X-ray diffraction indicates the presence of quartz as the principal mineralogical phase in all samples. The 57Fe Mössbauer spectra at room temperature of samples PMe-8 and PMe-9 show broadened spectra that were fitted using a distribution model. The most probable field of the magnetic component is 34 T, corresponding to the presence of small particles of goethite, confirmed by the 4.2 K spectrum. For the sample PMe-11, the MS showed the presence of well crystallized hematite. |
| |
Keywords: | impactites M?ssbauer spectroscopy hematite goethite |
本文献已被 SpringerLink 等数据库收录! |
|