Petrogenesis of Braedvikir Tindar, Western Volcanic Zone, Iceland
Braedvikir is a hyaloclastite dominated tindar in the Prestahnukur fissure swarm in the Western Volcanic Zone of Iceland. Major & trace element chemistry shows that Braedvikir is geochemically different from the region’s glaciovolcanic edifices, characterized by its highly depleted levels of FeO...
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ftcollegewooster:oai:openworks.wooster.edu:independentstudy-11093 2023-05-15T16:47:04+02:00 Petrogenesis of Braedvikir Tindar, Western Volcanic Zone, Iceland Crawford-Muscat, Simon E 2019-01-01T08:00:00Z application/pdf https://openworks.wooster.edu/independentstudy/8696 https://openworks.wooster.edu/cgi/viewcontent.cgi?article=11093&context=independentstudy English (United States) eng Open Works https://openworks.wooster.edu/independentstudy/8696 https://openworks.wooster.edu/cgi/viewcontent.cgi?article=11093&context=independentstudy Senior Independent Study Theses Petrology Glaciovolcanism Geochemistry Iceland Braedvikir Basalt Geology Volcanology text 2019 ftcollegewooster 2022-04-27T05:50:43Z Braedvikir is a hyaloclastite dominated tindar in the Prestahnukur fissure swarm in the Western Volcanic Zone of Iceland. Major & trace element chemistry shows that Braedvikir is geochemically different from the region’s glaciovolcanic edifices, characterized by its highly depleted levels of FeO* and MgO and enrichment in SiO2. Samples show limited variation in incompatible elements, suggesting little differentiation in melting conditions. Major elements establish a variation in chemistry between lithostratigraphic units on the ridge. Units are genetically related by a 3-kb fractional crystallization model (Rhyolite-MELTS), which generates two pyroxenes and a range of plagioclase compositions. Plagioclase compositions could be indicative of a variety of crustal processes, but the data used in this study cannot conclusively point to any given process. A two-stage eruptive model was formulated using major element distinctions and cross-cutting relationships on the ridge. This model separates the initial explosive event which formed the bulk of the ridge (Unit LT) from a secondary event consisting of an explosive phase (TB1-2) followed by the intrusion of pipes (Lb1-8), a dike set (Ld1-2), and pillows (Lp1). This secondary event is hypothesized to be caused by a recharge event in the magma lens. This supply of more primitive magma could explain the difference in MgO levels between unit LT and all other units. Text Iceland The College of Wooster: Open Works |
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Open Polar |
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The College of Wooster: Open Works |
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ftcollegewooster |
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English |
topic |
Petrology Glaciovolcanism Geochemistry Iceland Braedvikir Basalt Geology Volcanology |
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Petrology Glaciovolcanism Geochemistry Iceland Braedvikir Basalt Geology Volcanology Crawford-Muscat, Simon E Petrogenesis of Braedvikir Tindar, Western Volcanic Zone, Iceland |
topic_facet |
Petrology Glaciovolcanism Geochemistry Iceland Braedvikir Basalt Geology Volcanology |
description |
Braedvikir is a hyaloclastite dominated tindar in the Prestahnukur fissure swarm in the Western Volcanic Zone of Iceland. Major & trace element chemistry shows that Braedvikir is geochemically different from the region’s glaciovolcanic edifices, characterized by its highly depleted levels of FeO* and MgO and enrichment in SiO2. Samples show limited variation in incompatible elements, suggesting little differentiation in melting conditions. Major elements establish a variation in chemistry between lithostratigraphic units on the ridge. Units are genetically related by a 3-kb fractional crystallization model (Rhyolite-MELTS), which generates two pyroxenes and a range of plagioclase compositions. Plagioclase compositions could be indicative of a variety of crustal processes, but the data used in this study cannot conclusively point to any given process. A two-stage eruptive model was formulated using major element distinctions and cross-cutting relationships on the ridge. This model separates the initial explosive event which formed the bulk of the ridge (Unit LT) from a secondary event consisting of an explosive phase (TB1-2) followed by the intrusion of pipes (Lb1-8), a dike set (Ld1-2), and pillows (Lp1). This secondary event is hypothesized to be caused by a recharge event in the magma lens. This supply of more primitive magma could explain the difference in MgO levels between unit LT and all other units. |
format |
Text |
author |
Crawford-Muscat, Simon E |
author_facet |
Crawford-Muscat, Simon E |
author_sort |
Crawford-Muscat, Simon E |
title |
Petrogenesis of Braedvikir Tindar, Western Volcanic Zone, Iceland |
title_short |
Petrogenesis of Braedvikir Tindar, Western Volcanic Zone, Iceland |
title_full |
Petrogenesis of Braedvikir Tindar, Western Volcanic Zone, Iceland |
title_fullStr |
Petrogenesis of Braedvikir Tindar, Western Volcanic Zone, Iceland |
title_full_unstemmed |
Petrogenesis of Braedvikir Tindar, Western Volcanic Zone, Iceland |
title_sort |
petrogenesis of braedvikir tindar, western volcanic zone, iceland |
publisher |
Open Works |
publishDate |
2019 |
url |
https://openworks.wooster.edu/independentstudy/8696 https://openworks.wooster.edu/cgi/viewcontent.cgi?article=11093&context=independentstudy |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Senior Independent Study Theses |
op_relation |
https://openworks.wooster.edu/independentstudy/8696 https://openworks.wooster.edu/cgi/viewcontent.cgi?article=11093&context=independentstudy |
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1766037162540662784 |