دورية أكاديمية
Experimental Investigation into the Thermal and Magmatic Evolution of Mercury
| العنوان: | Experimental Investigation into the Thermal and Magmatic Evolution of Mercury |
|---|---|
| المؤلفون: | Vander Kaaden, Kathleen |
| المصدر: | Earth and Planetary Sciences ETDs |
| بيانات النشر: | UNM Digital Repository |
| سنة النشر: | 2016 |
| المجموعة: | UNM Digital Repository (The University of New Mexico) |
| مصطلحات موضوعية: | Mercury, Carbon, Oxygen Fugacity, Boninites, Graphite Floatation Crust, MESSENGER, Northern Volcanic Plains, Sink-float Experiments |
| الوصف: | During the time that the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft was in orbit around the innermost planet, new and exciting results regarding the planets structure, chemical makeup, and diverse surface were revealed, confirming that Mercury is a geochemical endmember among the terrestrial planets. Data from this mission, more specifically data from the X-Ray Spectrometer and Gamma-Ray Spectrometer onboard MESSENGER, has been used to provide insight into the thermal and magmatic evolution of Mercury. This dissertation consists of five chapters that, as a whole, have substantially increased our knowledge about Mercury through a high pressure and high temperature experimental investigation. First, we identified nine distinct geochemical regions that have characteristic major element compositions. We computed silicate and sulfide mineralogy of these regions and petrologically classified them according to IUGS specifications. The diversity of the rocks and minerals on Mercury was then compared to other planetary bodies revealing the wide range in diversity of the mercurian surface. Second, we conducted sink-float experiments on a melt composition similar to the composition of the largest volcanic field on the planet to provide insight into crust formation on Mercury. These results suggested a primary floatation crust composed of graphite is possible given a magma ocean event on Mercury. Third, we experimentally determined the phase assemblages associated with the largest volcanic field on the planet. From this data we were able to provide insight into eruption scenarios that produced the northern volcanic plains on Mercury. Fourth, we determined the sulfide concentration at sulfide saturation in mercurian-like melts by conducting sulfide solubility experiments on a synthetic rock composition matching the northern volcanic plains. These results indicated that the high amounts of sulfur on the surface of Mercury measured by MESSENGER are a direct consequence of the low ... |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | https://digitalrepository.unm.edu/eps_etds/109Test; https://digitalrepository.unm.edu/cgi/viewcontent.cgi?article=1109&context=eps_etdsTest |
| الإتاحة: | https://digitalrepository.unm.edu/eps_etds/109Test https://digitalrepository.unm.edu/cgi/viewcontent.cgi?article=1109&context=eps_etdsTest |
| رقم الانضمام: | edsbas.A3F91266 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |