Petrogenesis of low-Ti and high-Ti magmatic rocks of the Jurassic Ferrar Large Igneous Province, Antarctica
This study of Ferrar magmatic rocks from northern Victorialand and George V Land, Antarctica, is directed towards a better understanding of the petrogenesis of the two compositionally distinct magma series present within the Mid-Jurassic Ferrar Large Igneous Province: a low-Ti series (LTS: TiO2 ~ 0....
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ftdbthueringen:oai:www.db-thueringen.de:dbt_mods_00012313 2024-04-07T07:47:49+00:00 Petrogenesis of low-Ti and high-Ti magmatic rocks of the Jurassic Ferrar Large Igneous Province, Antarctica Hanemann, Ricarda Viereck-Götte, Lothar Holtz, Francois 2007 202 Seiten https://nbn-resolving.org/urn:nbn:de:gbv:27-20090211-105241-6 https://www.db-thueringen.de/receive/dbt_mods_00012313 https://www.db-thueringen.de/servlets/MCRZipServlet/dbt_derivate_00016658 http://uri.gbv.de/document/gvk:ppn:591425572 deu ger https://nbn-resolving.org/urn:nbn:de:gbv:27-20090211-105241-6 https://www.db-thueringen.de/receive/dbt_mods_00012313 https://www.db-thueringen.de/servlets/MCRZipServlet/dbt_derivate_00016658 http://uri.gbv.de/document/gvk:ppn:591425572 all rights reserved info:eu-repo/semantics/openAccess thesis Doktorarbeit ddc:550 für Harvesting bereitgestellt Klasse A Trapp Andesit Magmatisches Gestein dissertation Text doc-type:PhDThesis 2007 ftdbthueringen 2024-03-08T13:32:26Z This study of Ferrar magmatic rocks from northern Victorialand and George V Land, Antarctica, is directed towards a better understanding of the petrogenesis of the two compositionally distinct magma series present within the Mid-Jurassic Ferrar Large Igneous Province: a low-Ti series (LTS: TiO2 ~ 0.4 – 1.2 wt%) and a high-Ti series (HTS: TiO2 ~ 1.7 – 2.1 wt%). On the basis of their mineral and whole-rock chemical compositions (including rare earth elements and platinum-group elements) the differentiation history, the melt generation and magma source characteristics are evaluated. For both magma series, an identical primary magma is deduced that has been generated by high-degree partial melting of a single, refractory subcontinental lithospheric magma source. A polybaric differentiation model is developed suggesting that the two magma series experienced pre-emplacement differentiation within independent temporary magma reservoirs at different crustal depths and hence under different prevailing conditions. Based on this model, the influence of changing redox conditions and water activities on the Ferrar magma evolution is examined by equilibrium crystallisation experiments performed in internally heated pressure vessels. The comparison of the experimental results with the compositional differences analysed in the natural low-Ti and high-Ti rocks indicates that prior to final magma emplacement at upper crustal levels the HTS magma differentiated under lower pressure, lower water activity and lower oxygen fugacity than the LTS magma. Doctoral or Postdoctoral Thesis Antarc* Antarctica George V Land Digital Library Thüringen George V Land ENVELOPE(148.000,148.000,-68.500,-68.500) |
institution |
Open Polar |
collection |
Digital Library Thüringen |
op_collection_id |
ftdbthueringen |
language |
German |
topic |
thesis Doktorarbeit ddc:550 für Harvesting bereitgestellt Klasse A Trapp Andesit Magmatisches Gestein |
spellingShingle |
thesis Doktorarbeit ddc:550 für Harvesting bereitgestellt Klasse A Trapp Andesit Magmatisches Gestein Hanemann, Ricarda Petrogenesis of low-Ti and high-Ti magmatic rocks of the Jurassic Ferrar Large Igneous Province, Antarctica |
topic_facet |
thesis Doktorarbeit ddc:550 für Harvesting bereitgestellt Klasse A Trapp Andesit Magmatisches Gestein |
description |
This study of Ferrar magmatic rocks from northern Victorialand and George V Land, Antarctica, is directed towards a better understanding of the petrogenesis of the two compositionally distinct magma series present within the Mid-Jurassic Ferrar Large Igneous Province: a low-Ti series (LTS: TiO2 ~ 0.4 – 1.2 wt%) and a high-Ti series (HTS: TiO2 ~ 1.7 – 2.1 wt%). On the basis of their mineral and whole-rock chemical compositions (including rare earth elements and platinum-group elements) the differentiation history, the melt generation and magma source characteristics are evaluated. For both magma series, an identical primary magma is deduced that has been generated by high-degree partial melting of a single, refractory subcontinental lithospheric magma source. A polybaric differentiation model is developed suggesting that the two magma series experienced pre-emplacement differentiation within independent temporary magma reservoirs at different crustal depths and hence under different prevailing conditions. Based on this model, the influence of changing redox conditions and water activities on the Ferrar magma evolution is examined by equilibrium crystallisation experiments performed in internally heated pressure vessels. The comparison of the experimental results with the compositional differences analysed in the natural low-Ti and high-Ti rocks indicates that prior to final magma emplacement at upper crustal levels the HTS magma differentiated under lower pressure, lower water activity and lower oxygen fugacity than the LTS magma. |
author2 |
Viereck-Götte, Lothar Holtz, Francois |
format |
Doctoral or Postdoctoral Thesis |
author |
Hanemann, Ricarda |
author_facet |
Hanemann, Ricarda |
author_sort |
Hanemann, Ricarda |
title |
Petrogenesis of low-Ti and high-Ti magmatic rocks of the Jurassic Ferrar Large Igneous Province, Antarctica |
title_short |
Petrogenesis of low-Ti and high-Ti magmatic rocks of the Jurassic Ferrar Large Igneous Province, Antarctica |
title_full |
Petrogenesis of low-Ti and high-Ti magmatic rocks of the Jurassic Ferrar Large Igneous Province, Antarctica |
title_fullStr |
Petrogenesis of low-Ti and high-Ti magmatic rocks of the Jurassic Ferrar Large Igneous Province, Antarctica |
title_full_unstemmed |
Petrogenesis of low-Ti and high-Ti magmatic rocks of the Jurassic Ferrar Large Igneous Province, Antarctica |
title_sort |
petrogenesis of low-ti and high-ti magmatic rocks of the jurassic ferrar large igneous province, antarctica |
publishDate |
2007 |
url |
https://nbn-resolving.org/urn:nbn:de:gbv:27-20090211-105241-6 https://www.db-thueringen.de/receive/dbt_mods_00012313 https://www.db-thueringen.de/servlets/MCRZipServlet/dbt_derivate_00016658 http://uri.gbv.de/document/gvk:ppn:591425572 |
long_lat |
ENVELOPE(148.000,148.000,-68.500,-68.500) |
geographic |
George V Land |
geographic_facet |
George V Land |
genre |
Antarc* Antarctica George V Land |
genre_facet |
Antarc* Antarctica George V Land |
op_relation |
https://nbn-resolving.org/urn:nbn:de:gbv:27-20090211-105241-6 https://www.db-thueringen.de/receive/dbt_mods_00012313 https://www.db-thueringen.de/servlets/MCRZipServlet/dbt_derivate_00016658 http://uri.gbv.de/document/gvk:ppn:591425572 |
op_rights |
all rights reserved info:eu-repo/semantics/openAccess |
_version_ |
1795674969948028928 |