Buchumschlag

New U-Pb zircon ages of plutonic rocks from the Jeannin Lake area, Quebec an evaluation of the Kuujj...

Bibliographische Detailangaben
Personen und Körperschaften:	Rayner, N M (VerfasserIn); Lafrance, I (VerfasserIn); Corrigan, D (VerfasserIn); Charette, B (VerfasserIn)
Format:	E-Artikel
Sprache:	English
veröffentlicht:	Natural Resources Canada, 2017
Gesamtaufnahme:	GEM2: Geo-mapping for Energy and Minerals New U-Pb zircon ages of plutonic rocks from the Jeannin Lake area, Quebec; Geological Survey of Canada
Schlagwörter:	Archean; Bedrock Geology; Lithology; Igneous Rocks; Intrusive Rocks; Monzonites; Granites; Tonalites; Pegmatites; Diorites; Structural Features; Faults; Shear Zones; Tectonic History; Tectonic Interpretations; Rifting; Crystallization; Deformation; Metamorphism; Foliation; Recrystallization; Radiometric Dates; Uranium Lead Dating; Zircon; Correlations; New Quebec Orogen; Rachel-Laporte Zone; Boullé Complex; Wheeler Complex; Kuujjuaq Domain; Lhande Plutonic Suite; Champdoré Plutonic Suite; Saffray Suite; Dancelou Suite; Turcotte Lake Fault; Superior Craton; Core Zone; Trans-Hudson Orogeny; Quebec; Jeannin Lake; Wheeler River; Lhande Lake; Champdoré Lake;
Quelle:	GEOSCAN
Zusammenfassung:	Three strongly foliated or recrystallized samples were identified in the fi... Three strongly foliated or recrystallized samples were identified in the field as potential Archean basement and were collected for geochronology in order to compare their crystallization ages with the ages of known basement in the Superior Craton and Core Zone. A porphyritic monzonite from the thrust-bound Boullé Complex within the Rachel-Laporte Zone yields a crystallization age of 2690 ± 4 Ma. A 2696 ± 4 Ma magnetite granite of the Saffray Suite is similar in age and composition to large potassic suites of the Superior Craton. These ages stand in contrast to a younger 2668 ± 5 Ma crystallization age for a tonalite of the Wheeler Complex from a separate structural dome within the Rachel-Laporte Zone. The ages of the Champdoré and Lhande plutonic suites are 1839 ± 6 Ma and 1835 ± 4 Ma, respectively. As these units are metamorphosed and strongly foliated, they also provide a maximum age constraint on peak Paleoproterozoic tectonothermal overprint. The post-tectonic pegmatite of the Dancelou Suite provides a 1793 ± 4 Ma constraint on the cessation of deformation in that area.

Online

Online:

https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/fulle.web&search1=R=306180

https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/shorte.web&search1=PROJECT=340512

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