2004
DOI: 10.1016/j.gca.2003.08.004
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Sm-Nd, Lu-Hf and Pb-Pb signatures of gneisses and granitoids from the La Grande belt: extent of late Archean crustal recycling in the northeastern Superior Province, Canada

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Cited by 17 publications
(5 citation statements)
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“…The La Grande and Opinaca terranes to the East of James Bay are aligned with the North Caribou and Uchi terranes to the West and exhibit the same structural, petrological and geophysical pattern as them (Percival et al, 2012;. Their igneous basements are much older than the final accretion event (Isnard and Gariépy, 2004), and they are considered to be part of the eastern portion of the craton core. Further south, the Abitibi and Opatica subprovinces can be tied to the Wawa and Quetico terranes across the Kapuskasing structural zone.…”
Section: Geological Structurementioning
confidence: 99%
“…The La Grande and Opinaca terranes to the East of James Bay are aligned with the North Caribou and Uchi terranes to the West and exhibit the same structural, petrological and geophysical pattern as them (Percival et al, 2012;. Their igneous basements are much older than the final accretion event (Isnard and Gariépy, 2004), and they are considered to be part of the eastern portion of the craton core. Further south, the Abitibi and Opatica subprovinces can be tied to the Wawa and Quetico terranes across the Kapuskasing structural zone.…”
Section: Geological Structurementioning
confidence: 99%
“…Geochemical and petrological studies permit discrimination between juvenile mantle melts and magmas that incorporate or recycle crustal precursors [ Isnard and Gariépy , ]. The extent of contamination, however, depends on the intracrustal history of ascent and storage [ Huppert and Sparks , ; Annen et al , ] and is not a reliable indicator of the proportions of juvenile and older components in the whole crust.…”
Section: Structure and Geological Evolution Of The Superior Provincementioning
confidence: 99%
“…As discussed above, however, this proportion does not reflect the amount of older crust in the domain and only implies that the Eastmain magmas interacted weakly with an older basement as they rose and crystallized at their emplacement level. To the west, in the adjacent Nemiscau domain of the Opinaca terrane, plutonic rocks record large amounts of contamination by ancient crustal precursors [ Isnard and Gariépy , ]. The La Grande‐Opinaca and North Caribou‐Uchi pairings follow the same structural and petrological pattern.…”
Section: Structure and Geological Evolution Of The Superior Provincementioning
confidence: 99%
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