کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4714736 | 1353987 | 2007 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Pele's hairs and tears: Natural probe of volcanic plume Pele's hairs and tears: Natural probe of volcanic plume](/preview/png/4714736.png)
We present a detailed petrographic study of Pele's hairs and tears sampled from Masaya volcano (Nicaragua). This study provides new observations of these little-known pyroclastic objects using both secondary electron images (SEI) and back scattering electron images (BSEI). Our work shows that Pele's tears can be associated with Pele's hairs after their formation: tears can be trapped on the walls and/or in the cavities of Pele's hairs. Moreover, chemical investigations of the Pele's hairs and tears highlight the presence of a chemical zonation. The edge of these tears and hairs show a siliceous enrichment, allowing us to quantify the interaction time of the silicate glass with acid gases in the volcanic plume. This study confirms the syneruptive and post eruptive volatile exsolution from Pele's hairs and tears.
Journal: Journal of Volcanology and Geothermal Research - Volume 164, Issue 4, 1 August 2007, Pages 244–253