Petrogenesis, emplacement setting, and magmatic-hydrothermal mineralization of the peralkaline Flowers River Igneous Suite, Hopedale Block, Labrador

dc.contributor.advisorVan Rooyen, Deanne
dc.contributor.advisorMcFarlane, Christopher R.M.
dc.contributor.authorDucharme, Taylor A.
dc.date.accessioned2023-03-01T16:48:03Z
dc.date.available2023-03-01T16:48:03Z
dc.date.issued2020
dc.date.updated2023-03-01T15:03:17Z
dc.description.abstractThe peralkaline Flowers River Igneous Suite intrudes the southernmost region of the Mesoproterozoic Nain Plutonic Suite composite batholith in north-central Labrador. The Flowers River complex comprises a voluminous series of peralkaline granite ring intrusions and their coeval volcanic assemblage, the latter of which has been identified as a target for rare metal exploration. Peralkaline igneous complexes throughout Labrador show a ubiquitous spatial association with earlier anorthosite-mangerite-charnockite-granite (AMCG)-affinity plutonism, suggesting the geodynamic conditions responsible for generating the latter may have systematically conditioned those sites to subsequently produce highly evolved, incompatible element-enriched magmas. Laser ablation inductively coupled plasma-mass spectrometry (LA ICP-MS) U-Pb zircon geochronology is used to define a high-resolution magmatic and hydrothermal timeline for the Flowers River complex and its host suites. The Flowers River Granite intruded the local Nain Plutonic Suite rocks after ca. 8 Myr of quiescence, though trace element compositions indicate these rocks share a common, incompatible element-enriched source. Protracted fractionation of the liquids derived from this source gave rise to two contrasting styles of magmatic-hydrothermal (Zr-Nb-Y-)REE mineralization, both hosted by the cogenetic volcanic rocks overlying the plutonic complex.
dc.description.copyright© Taylor Ducharme, 2020
dc.formattext/xml
dc.format.extentix, 146 pages
dc.format.mediumelectronic
dc.identifier.urihttps://unbscholar.lib.unb.ca/handle/1882/14500
dc.language.isoen_CA
dc.publisherUniversity of New Brunswick
dc.rightshttp://purl.org/coar/access_right/c_abf2
dc.subject.disciplineEarth Sciences
dc.titlePetrogenesis, emplacement setting, and magmatic-hydrothermal mineralization of the peralkaline Flowers River Igneous Suite, Hopedale Block, Labrador
dc.typemaster thesis
thesis.degree.disciplineEarth Sciences
thesis.degree.fullnameMaster of Science
thesis.degree.grantorUniversity of New Brunswick
thesis.degree.levelmasters
thesis.degree.nameM.Sc.

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