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Faribault-Thury Complex

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Journal Article

Constraints on early Archean crustal extraction and tholeiitic–komatiitic volcanism in greenstone belts of the Northern Superior Province

Charles Maurice, Don Francis, Louis Madore
Published: 20 March 2003
Canadian Journal of Earth Sciences (2003) 40 (3): 431–445.
DOI: https://doi.org/10.1139/e03-006
... of crustal conditions prior to the major volcanic events of the late Archean (Wawa–Abitibi subprovinces; ca. 2760–2700 Ma). Three of the best preserved belts are engulfed in tonalite intrusions of the Faribault-Thury Complex (FTC) and exhibit common chemical characteristics, which may imply a similar origin...
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Photomicrographs; all but D from Douglas Harbour domain. A, Western Faribault-Thury complex tonalite 98-3070A, plane light. Epidote (E) is euhedral when armored by biotite (B) but corroded when exposed to the quartzofeldspathic matrix (white). T=titanite; black grains are Fe-Ti-oxides and small euhedral white grains are apatite. Field of view is 5 mm wide. B, Eastern Faribault-Thury complex potassic trondhjemite 98-2200A, plane light. Note the numerous euhedral allanite +epidote  grains E hosted by muscovite (M), which shows corroded surfaces when exposed to the quartzofeldspathic matrix (white). B=biotite. Field is 1 mm wide. C, Trondhjemite 98-2200A, plane light. Note euhedral allanite (A) core to epidote (E) and corroded end of grain where unarmored by biotite (B). Allanite is less corroded than epidote, perhaps because of the low solubility of Th and REE in polymerized felsic melts. Field is 1 mm wide. D, Goudalie domain, Lac La Potherie tonalite 99-128, plane light. Large anhedral, metamict allanite core has a discontinuous epidote rim. However, each part of the rim has the same crystallographic orientation, indicating that they were once a single overgrowth. Note the euhedral biotite (B) and plagioclase (P) inclusions in the allanite. Field is 5 mm wide. E, Western Faribault-Thury complex, amphibolite-grade metabasalt 98-5059A. Plane light, field is 5 mm wide. Note alignment of hornblende grains (dark prisms), all with very similar crystallographic orientations as a result of recrystallization synchronous with deformation. F, Western Faribault-Thury complex tonalite 98-3070A. Note the serrated, high-energy, feldspar-feldspar grain boundaries. Crossed polars, field is 5 mm wide.

Photomicrographs; all but D from Douglas Harbour domain. A , Western Far...

Published: 01 March 2003
Figure 3. Photomicrographs; all but D from Douglas Harbour domain. A , Western Faribault-Thury complex tonalite 98-3070A, plane light. Epidote ( E ) is euhedral when armored by biotite ( B ) but corroded when exposed to the quartzofeldspathic matrix ( white ). T = titanite ; black
Image
A, Pressures calculated using the Schmidt (1992) calibration of the Al-in-hornblende geobarometer plotted against temperatures calculated using the Blundy and Holland (1990) geothermometer, compared to pressure and temperature determinations on supercrustal rocks (VS). The Minto VS field is from Percival and Skulski (2000). The field labeled FT-VS (Baille-Barrelle et al. 2000) is for amphibolite-grade rocks from the Faribault-Thury complex. Shaded fields labeled Pg are the reconstructed feldspar temperatures (this article) applied to rocks of the enderbite (E) series. Solid lines show limits of mineral stabilities, while light dashed lines show solidus and liquidus curves for a tonalite investigated by Schmidt and Thompson (1996). Gt = garnet, Ep = epidote, Plag = plagioclase, Amph = amphibole, Biot = biotite, K-Spar = alkali feldspar, Cpx = clinopyroxene. The heavy dashed arrows show a possible trajectory for epidote-bearing TTG magmas from the Minto. Adiabatic path taken from Johannes and Holtz (1991). Note that results from the Faribault-Thury complex of the Douglas Harbour domain are offset to higher pressures in comparison to those from other parts of the Minto; that gabbro-norites, a monzonite, and an enderbite (not shown in B) from the Troie complex and Qimussinguat complex do not preserve these higher pressures; and that epidote-free TT-GG-CT-OT (−Ep) record higher temperatures than epidote-bearing (+Ep) variants. B, Same data compared to the position of the granitic solidus (Johannes and Holtz 1991) for various water activities and wt% H2O contents.

A , Pressures calculated using the Schmidt ( 1992 ) calibration of the Al-i...

Published: 01 March 2003
). The Minto VS field is from Percival and Skulski ( 2000 ). The field labeled FT-VS (Baille-Barrelle et al. 2000 ) is for amphibolite-grade rocks from the Faribault-Thury complex. Shaded fields labeled Pg are the reconstructed feldspar temperatures (this article) applied to rocks of the enderbite ( E
Image
Simplified geological map of northern Quebec, showing the domain boundaries from Percival and Skulski (2000) and the locations of the map sheets named in the text. Inset A shows the location of map B, while inset C (adapted from Bédard et al. 2003) shows a detail of the Douglas Harbour domain from the Lac Peters, Pélican, Klotz, and Rivière Arnaud map sheets. Bold line in B surrounds Minto Block. Dashes in C mark areas strongly affected by Proterozoic deformation. FT=Faribault Thury complex, T=Troie complex, Q=Quimussinguat complex, L=Lepelle complex, PZ=Proterozoic rocks. D=Diana complex, an Archaean terrane accreted to the Minto Block in the Proterozoic.

Simplified geological map of northern Quebec, showing the domain boundaries...

Published: 01 March 2003
of the Douglas Harbour domain from the Lac Peters, Pélican, Klotz, and Rivière Arnaud map sheets. Bold line in B surrounds Minto Block. Dashes in C mark areas strongly affected by Proterozoic deformation. F T = Faribault Thury complex, T = Troie complex, Q = Quimussinguat
Journal Article

AN OCCURRENCE OF SAPPHIRINE IN THE ARCHEAN SUPERIOR PROVINCE, NORTHERN QUEBEC

Sandrine Cadéron, Walter E. Trzcienski, Jr., Jean H. Bédard, Normand Goulet
Published: 01 February 2005
The Canadian Mineralogist (2005) 43 (1): 463–478.
DOI: https://doi.org/10.2113/gscanmin.43.1.463
... deformed felsic plutonic rocks that host volcano-sedimentary slivers and rafts. The Douglas Harbour Domain contains the Faribault–Thury tonalite–trondhjemite complex, intruded by the 2740–2726 Ma enderbitic Troie Complex. Slivers and enclaves of volcano-sedimentary rocks in the Troie Complex...
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Journal Article

Evidence for Regional-Scale, Pluton-Driven, High-Grade Metamorphism in the Archaean Minto Block, Northern Superior Province, Canada

Jean H. Bédard
Published: 01 March 2003
The Journal of Geology (2003) 111 (2): 183–205.
DOI: https://doi.org/10.1086/345842
...Figure 3. Photomicrographs; all but D from Douglas Harbour domain. A , Western Faribault-Thury complex tonalite 98-3070A, plane light. Epidote ( E ) is euhedral when armored by biotite ( B ) but corroded when exposed to the quartzofeldspathic matrix ( white ). T = titanite ; black...
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