Emplacement history of the Pearly Gates anorthosite pluton and spatially related Tessiarsuyungoakh intrusion, and metamorphic petrology of the adjacent Tasiuyak paragneiss, northern Labrador

The Mesoproterozoic Nain Plutonic Suite consists of anorthositic and granitic intrusions, which were emplaced along an older suture zone marked by the Torngat Orogen in northern Labrador. This study concerns the western margin of the Nain Plutonic Suite where the Pearly Gates Anorthosite pluton and...

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Main Author: Tettelaar, Tanya Anne
Format: Thesis
Language:English
Published: Memorial University of Newfoundland 2004
Subjects:
Online Access:https://research.library.mun.ca/6657/
https://research.library.mun.ca/6657/1/TanyaAnneTettelaar.pdf
https://research.library.mun.ca/6657/3/TanyaAnneTettelaar.pdf
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spelling ftmemorialuniv:oai:research.library.mun.ca:6657 2023-10-01T03:57:27+02:00 Emplacement history of the Pearly Gates anorthosite pluton and spatially related Tessiarsuyungoakh intrusion, and metamorphic petrology of the adjacent Tasiuyak paragneiss, northern Labrador Tettelaar, Tanya Anne 2004 application/pdf https://research.library.mun.ca/6657/ https://research.library.mun.ca/6657/1/TanyaAnneTettelaar.pdf https://research.library.mun.ca/6657/3/TanyaAnneTettelaar.pdf en eng Memorial University of Newfoundland https://research.library.mun.ca/6657/1/TanyaAnneTettelaar.pdf https://research.library.mun.ca/6657/3/TanyaAnneTettelaar.pdf Tettelaar, Tanya Anne <https://research.library.mun.ca/view/creator_az/Tettelaar=3ATanya_Anne=3A=3A.html> (2004) Emplacement history of the Pearly Gates anorthosite pluton and spatially related Tessiarsuyungoakh intrusion, and metamorphic petrology of the adjacent Tasiuyak paragneiss, northern Labrador. Masters thesis, Memorial University of Newfoundland. thesis_license Thesis NonPeerReviewed 2004 ftmemorialuniv 2023-09-03T06:46:00Z The Mesoproterozoic Nain Plutonic Suite consists of anorthositic and granitic intrusions, which were emplaced along an older suture zone marked by the Torngat Orogen in northern Labrador. This study concerns the western margin of the Nain Plutonic Suite where the Pearly Gates Anorthosite pluton and spatially related Tessiarsuyungoakh intrusion, and the Makhavinekh Lake pluton, were intruded into the Paleoproterozoic Tasiuyak paragneiss of the Southeastern Churchill Province. Detailed geological mapping, petrography and U-Pb Thermal Ionization Mass Spectrometry dating of zircon and baddeleyite of the Pearly Gates Anorthosite pluton and Tessiarsuyungoakh intrusion were used to ascertain the mode of emplacement and crystallization ages of the major intrusive units. In addition, studies of the Paleoproterozoic regional metamorphism and Mesoproterozoic contact metamorphism of the Tasiuyak paragneiss were performed using the NaKFMASH petrogenetic grid to determine P-T conditions. The results of this thesis project indicate the following geological history of the study area. -- The Tasiuyak paragneiss contains evidence of the Paleoproterozoic regional metamorphic mineral sub-assemblage garnet + biotite + sillimanite. Detailed petrography of this sub-assemblage indicated that the prograde and retrograde history of this unit occurred within the sillimanite stability field and peak P-T conditions were constrained in the range of 7.2 to 10.2 kbar and 800° to 830°C. Prior to ca. 1363 Ma, reactivation of structures in the paragneiss provided fractures into which monzonitic and monzodioritic magmas intruded as sheets. The 1363 ± 3 Ma monzonite and 1360 ± 4 Ma monzodiorite formed the composite Tessiarsuyungoakh intrusion. This intrusion produced a small (< 20 m) contact aureole in the Tasiuyak paragneiss. Incipient development of the contact metamorphic sub-assemblage cordierite + orthopyroxene + spinel replaced the regional sub-assemblage of garnet + biotite + sillimanite. This suggests that the Tessiarsuyungoakh intrusion ... Thesis Nain Memorial University of Newfoundland: Research Repository Nain ENVELOPE(-61.695,-61.695,56.542,56.542)
institution Open Polar
collection Memorial University of Newfoundland: Research Repository
op_collection_id ftmemorialuniv
language English
description The Mesoproterozoic Nain Plutonic Suite consists of anorthositic and granitic intrusions, which were emplaced along an older suture zone marked by the Torngat Orogen in northern Labrador. This study concerns the western margin of the Nain Plutonic Suite where the Pearly Gates Anorthosite pluton and spatially related Tessiarsuyungoakh intrusion, and the Makhavinekh Lake pluton, were intruded into the Paleoproterozoic Tasiuyak paragneiss of the Southeastern Churchill Province. Detailed geological mapping, petrography and U-Pb Thermal Ionization Mass Spectrometry dating of zircon and baddeleyite of the Pearly Gates Anorthosite pluton and Tessiarsuyungoakh intrusion were used to ascertain the mode of emplacement and crystallization ages of the major intrusive units. In addition, studies of the Paleoproterozoic regional metamorphism and Mesoproterozoic contact metamorphism of the Tasiuyak paragneiss were performed using the NaKFMASH petrogenetic grid to determine P-T conditions. The results of this thesis project indicate the following geological history of the study area. -- The Tasiuyak paragneiss contains evidence of the Paleoproterozoic regional metamorphic mineral sub-assemblage garnet + biotite + sillimanite. Detailed petrography of this sub-assemblage indicated that the prograde and retrograde history of this unit occurred within the sillimanite stability field and peak P-T conditions were constrained in the range of 7.2 to 10.2 kbar and 800° to 830°C. Prior to ca. 1363 Ma, reactivation of structures in the paragneiss provided fractures into which monzonitic and monzodioritic magmas intruded as sheets. The 1363 ± 3 Ma monzonite and 1360 ± 4 Ma monzodiorite formed the composite Tessiarsuyungoakh intrusion. This intrusion produced a small (< 20 m) contact aureole in the Tasiuyak paragneiss. Incipient development of the contact metamorphic sub-assemblage cordierite + orthopyroxene + spinel replaced the regional sub-assemblage of garnet + biotite + sillimanite. This suggests that the Tessiarsuyungoakh intrusion ...
format Thesis
author Tettelaar, Tanya Anne
spellingShingle Tettelaar, Tanya Anne
Emplacement history of the Pearly Gates anorthosite pluton and spatially related Tessiarsuyungoakh intrusion, and metamorphic petrology of the adjacent Tasiuyak paragneiss, northern Labrador
author_facet Tettelaar, Tanya Anne
author_sort Tettelaar, Tanya Anne
title Emplacement history of the Pearly Gates anorthosite pluton and spatially related Tessiarsuyungoakh intrusion, and metamorphic petrology of the adjacent Tasiuyak paragneiss, northern Labrador
title_short Emplacement history of the Pearly Gates anorthosite pluton and spatially related Tessiarsuyungoakh intrusion, and metamorphic petrology of the adjacent Tasiuyak paragneiss, northern Labrador
title_full Emplacement history of the Pearly Gates anorthosite pluton and spatially related Tessiarsuyungoakh intrusion, and metamorphic petrology of the adjacent Tasiuyak paragneiss, northern Labrador
title_fullStr Emplacement history of the Pearly Gates anorthosite pluton and spatially related Tessiarsuyungoakh intrusion, and metamorphic petrology of the adjacent Tasiuyak paragneiss, northern Labrador
title_full_unstemmed Emplacement history of the Pearly Gates anorthosite pluton and spatially related Tessiarsuyungoakh intrusion, and metamorphic petrology of the adjacent Tasiuyak paragneiss, northern Labrador
title_sort emplacement history of the pearly gates anorthosite pluton and spatially related tessiarsuyungoakh intrusion, and metamorphic petrology of the adjacent tasiuyak paragneiss, northern labrador
publisher Memorial University of Newfoundland
publishDate 2004
url https://research.library.mun.ca/6657/
https://research.library.mun.ca/6657/1/TanyaAnneTettelaar.pdf
https://research.library.mun.ca/6657/3/TanyaAnneTettelaar.pdf
long_lat ENVELOPE(-61.695,-61.695,56.542,56.542)
geographic Nain
geographic_facet Nain
genre Nain
genre_facet Nain
op_relation https://research.library.mun.ca/6657/1/TanyaAnneTettelaar.pdf
https://research.library.mun.ca/6657/3/TanyaAnneTettelaar.pdf
Tettelaar, Tanya Anne <https://research.library.mun.ca/view/creator_az/Tettelaar=3ATanya_Anne=3A=3A.html> (2004) Emplacement history of the Pearly Gates anorthosite pluton and spatially related Tessiarsuyungoakh intrusion, and metamorphic petrology of the adjacent Tasiuyak paragneiss, northern Labrador. Masters thesis, Memorial University of Newfoundland.
op_rights thesis_license
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