Characterization of Pb and selected trace elements in amazonitic K-feldspar
Amazonitic K-feldspar is characteristic of evolved granitic pegmatites of NYF (niobium-yttrium-fluorine) type, associated with A-type granite emplacement. In this work, I focus on four notable examples of such an association: (1) West Keivy, Kola Peninsula, Russia, (2) Saint-Ludger-de-Milot, Quebec,...
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ftcanadathes:oai:collectionscanada.gc.ca:QMM.101650 2023-05-15T17:05:01+02:00 Characterization of Pb and selected trace elements in amazonitic K-feldspar Sokolov, Maria, 1969- Master of Science (Department of Earth and Planetary Sciences.) 2006 application/pdf http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101650 en eng McGill University alephsysno: 002600010 proquestno: AAIMR32787 Theses scanned by UMI/ProQuest. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101650 © Maria Sokolov, 2006 Amazonite -- Analysis Pegmatites Laser ablation Inductively coupled plasma mass spectrometry Electronic Thesis or Dissertation 2006 ftcanadathes 2014-02-16T00:59:27Z Amazonitic K-feldspar is characteristic of evolved granitic pegmatites of NYF (niobium-yttrium-fluorine) type, associated with A-type granite emplacement. In this work, I focus on four notable examples of such an association: (1) West Keivy, Kola Peninsula, Russia, (2) Saint-Ludger-de-Milot, Quebec, (3) Lac Sairs, Quebec, and (4) Morefield, Virginia. A fifth locality, the Broken Hill metamorphosed exhalative-type volcanogenic deposits in Australia, is an unusual type of amazonitic K-feldspar formed in an ore environment. A total of nineteen samples of amazonitic K-feldspar were characterized geochemically and mineralogically on the basis of X-ray diffraction, electron-microprobe and laser-ablation ICP-MS analyses. Lead, as an essential requirement for formation of the blue-green amazonitic color, has received particular attention. In every case, the analytical data show elevated amounts of Pb and rare alkalis, which strongly partition into the K-rich phase of the perthite intergrowth. Unusual micrometric grains, highly enriched in Pb, are found in cracks in the material from West Keivy. Some of the grains represent a new mineral species, a Pb-dominant feldspar. The presence of amazonitic K-feldspar in a granitic pegmatite is more than a curiosity. It can shed light on important petrogenetic issues such as metasomatic rejuvenation of crustal rocks prior to regional melting in a period of extension. Thesis kola peninsula Theses Canada/Thèses Canada (Library and Archives Canada) Kola Peninsula |
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Theses Canada/Thèses Canada (Library and Archives Canada) |
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ftcanadathes |
language |
English |
topic |
Amazonite -- Analysis Pegmatites Laser ablation Inductively coupled plasma mass spectrometry |
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Amazonite -- Analysis Pegmatites Laser ablation Inductively coupled plasma mass spectrometry Sokolov, Maria, 1969- Characterization of Pb and selected trace elements in amazonitic K-feldspar |
topic_facet |
Amazonite -- Analysis Pegmatites Laser ablation Inductively coupled plasma mass spectrometry |
description |
Amazonitic K-feldspar is characteristic of evolved granitic pegmatites of NYF (niobium-yttrium-fluorine) type, associated with A-type granite emplacement. In this work, I focus on four notable examples of such an association: (1) West Keivy, Kola Peninsula, Russia, (2) Saint-Ludger-de-Milot, Quebec, (3) Lac Sairs, Quebec, and (4) Morefield, Virginia. A fifth locality, the Broken Hill metamorphosed exhalative-type volcanogenic deposits in Australia, is an unusual type of amazonitic K-feldspar formed in an ore environment. A total of nineteen samples of amazonitic K-feldspar were characterized geochemically and mineralogically on the basis of X-ray diffraction, electron-microprobe and laser-ablation ICP-MS analyses. Lead, as an essential requirement for formation of the blue-green amazonitic color, has received particular attention. In every case, the analytical data show elevated amounts of Pb and rare alkalis, which strongly partition into the K-rich phase of the perthite intergrowth. Unusual micrometric grains, highly enriched in Pb, are found in cracks in the material from West Keivy. Some of the grains represent a new mineral species, a Pb-dominant feldspar. The presence of amazonitic K-feldspar in a granitic pegmatite is more than a curiosity. It can shed light on important petrogenetic issues such as metasomatic rejuvenation of crustal rocks prior to regional melting in a period of extension. |
format |
Thesis |
author |
Sokolov, Maria, 1969- |
author_facet |
Sokolov, Maria, 1969- |
author_sort |
Sokolov, Maria, 1969- |
title |
Characterization of Pb and selected trace elements in amazonitic K-feldspar |
title_short |
Characterization of Pb and selected trace elements in amazonitic K-feldspar |
title_full |
Characterization of Pb and selected trace elements in amazonitic K-feldspar |
title_fullStr |
Characterization of Pb and selected trace elements in amazonitic K-feldspar |
title_full_unstemmed |
Characterization of Pb and selected trace elements in amazonitic K-feldspar |
title_sort |
characterization of pb and selected trace elements in amazonitic k-feldspar |
publisher |
McGill University |
publishDate |
2006 |
url |
http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101650 |
op_coverage |
Master of Science (Department of Earth and Planetary Sciences.) |
geographic |
Kola Peninsula |
geographic_facet |
Kola Peninsula |
genre |
kola peninsula |
genre_facet |
kola peninsula |
op_relation |
alephsysno: 002600010 proquestno: AAIMR32787 Theses scanned by UMI/ProQuest. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101650 |
op_rights |
© Maria Sokolov, 2006 |
_version_ |
1766059394953379840 |