Structure and stratigraphy of the south flank of the Kisseynew Domain in the Trans-Hudson Orogen, Manitoba: implications for 1.845-1.77 Ga collision tectonics

Zwanzig, H. V.

doi:10.1139/cjes-36-11-1859

Cited by 8 publications

(13 citation statements)

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“…According to current interpretations, the northern volcanics formed when the Kisseynew back arc basin was thrust beneath an island arc at the edge of the Rae-Hearne craton. Oceanic crust has been identified at the suture [Zwanzig et al, 1999]. Crustal thickness exceeds 50 km at the southern margin of the belt [Nemeth et al, 1996;Nemeth and Hajnal, 1997] and decreases abruptly southeast of the Lynn Lake area, which may mark the edge of the subducted Kisseynew oceanic slab [White et al, 2000].…”

Section: Mantle Heat Flowmentioning

confidence: 99%

Surface heat flow, crustal temperatures and mantle heat flow in the Proterozoic Trans‐Hudson Orogen, Canadian Shield

et al. 2002

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The Paleo‐Proterozoic (1.8 Ga) Trans‐Hudson Orogen (THO), of intermediate age between the Superior (2.7 Ga) and Grenville (1.0 Ga) provinces, is located near the center of the Canadian Shield. We report on new measurements of heat flow and radiogenic heat production in 30 boreholes at 17 locations in this province. With these data, reliable values of heat flow and heat production are available at 45 sites in the THO. The mean and standard deviation of heat flow values are 42 ± 9 mW m−2. In this province, distinctive geological domains are associated with specific heat flow distributions. The heat flow pattern follows the surface geology with a central area of low values over an ancient back arc basin (Kisseynew) and an ancient island arc (Lynn Lake Belt) made of depleted juvenile rocks. Higher heat flow values found in peripheral belts are associated with recycled Archean crust. Within the Canadian Shield, there is no significant variation in heat flow as a function of age between provinces spanning about 2 Gyr. There is no geographic trend in heat flow across the Canadian Shield from the THO to the Labrador Sea. Low heat flow areas where the crustal structure is well‐known are used to determine an upper bound of 16 mW m−2 for the mantle heat flow. Present and paleogeotherms are calculated for a high heat flow area in the Thompson metasedimentary belt. The condition that melting temperatures were not reached in Proterozoic times yields a lower bound of 11–12 mW m−2 for the mantle heat flow.

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Section: Mantle Heat Flowmentioning

confidence: 99%

Surface heat flow, crustal temperatures and mantle heat flow in the Proterozoic Trans‐Hudson Orogen, Canadian Shield

et al. 2002

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“…The structural geology of the MB sequence, regional structural history of the Snow Lake area and geochemistry of the SLA volcanic rocks, have been studied by numerous researchers (Harrison 1949, Hogg 1957Russell 1957;Froese and Moore 1980;Bailes 1980; Bailes and Galley 1996Galley , 1999Bailes and Schledewitz 1998;Kraus 1998;Kraus and Williams 1999;Ansdell 2005;Connors 1996;and Zwanzig 1999;Beaumont-Smith and Gagné 2008). The setting and geological controls on gold mineralization at the Nor-Acme and associated deposits have been described by Hogg (1957), Galley et al (1986Galley et al ( , 1988Galley et al ( , 1991; Fieldhouse (1999), Fulton (1999), Gale (2002), Beaumont-Smith and Lavigne (2008), and Gagné (2009).…”

Section: R a F Tmentioning

confidence: 99%

“…84 -1.83 Ga (Connors 1996;David et al 1996). The SLA is dominated by 1.84-1.81 Ga fold-thrust-style tectonics, and is interpreted to have been thrust over the Amisk Collage along the Morton Lake fault (Syme et al 1995;Connors 1996, David et al 1996Ansdell et al 1999;Zwanzig 1999;Bailes and Galley 1999). Late during this event at ca.…”

Section: The Flin Flonmentioning

confidence: 99%

Evidence for voluminous bimodal pyroclastic volcanism during rifting of a Paleoproterozoic arc at Snow Lake, Manitoba

2017

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The thrust bounded McLeod Road -Birch Lake sequence (MB sequence) occurs within the Paleoproterozoic Snow Lake arc assemblage (SLA) of the Flin Flon Belt. Stratigraphic correlation of volcanic strata of the MB sequence with strata of the thrust bounded Chisel sequence, indicates that distinctive, submarine, eruption-fed, pyroclastic flow deposits are more extensive and voluminous than previously recognized (>10 km 3 ). These voluminous felsic pyroclastic deposits define a distinct magmatic and explosive volcanic event during bimodal volcanism that accompanied rifting of the Snow Lake arc. The felsic pyroclastic deposits define the remnants of a basin, or of nested basins, that formed during arc rifting and subsidence, and their eruption immediately preceded formation of the Chisel sequence volcanogenic massive sulfide (VMS) deposits. Although the Chisel sequence ore interval is recognized in the MB sequence, the lack of VMS-related alteration indicates that VMS hydrothermal activity was restricted to the Chisel portion of the basin. However, the MB sequence is host to the younger Snow Lake gold mine, a 1.4M oz. (43,699kg) gold producer.The overlying MORB-like Birch Lake Basalts, if conformable with the MB sequence, may represent a progression from a rifted-arc to a back-arc setting, however if thrust fault bounded they may represent the initial phases of arc-rifting, prior to the voluminous felsic pyroclastic eruptions. Correlation and integrity of stratigraphy between the thrust bounded MB and the SLA sequences indicates that the bounding thrust faults, which developed during accretionary processes, have less regional significance than previously interpreted.

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“…1) is a high-grade metamorphic complex (Zwanzig 1990;Ansdell et al 1995;Zwanzig 1999) dominated by 1. 86-1.84 Ga (Machado et al 1999) metaturbidite that grades upward and toward the periphery of the belt into 1.85-1.83 Ga (Ansdell et al 1995) fluvial-alluvial meta-arenites.…”

Section: Geology and Metamorphic History Of The Kisseynew Domainmentioning

confidence: 99%

“…The deformation history of the Kisseynew domain comprises five phases (e.g., Kraus and Menard 1997;Zwanzig 1999). F1 deformation (1.842-1.835 Ga) constituted a major burial episode and was accompanied by intrusion of 1.84-1.83 Ga calc-alkaline plutons in the Kisseynew domain and the adjacent Snow Lake belt.…”

Section: Geology and Metamorphic History Of The Kisseynew Domainmentioning

confidence: 99%

High-temperature, low-pressure metamorphism in the Kisseynew domain, Trans-Hudson orogen: crustal anatexis due to tectonic thickening?

White¹

2005

Can. J. Earth Sci.

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The Kisseynew domain within the central Trans-Hudson orogen constitutes a high-temperature (T) and lowto medium-pressure (P) metasedimentary belt characterized by uniform peak metamorphic conditions of 750 ± 50°C and 5-6 kbar (1 kbar = 100 MPa). To investigate the thermal evolution of the Kisseynew domain 1-dimensional thermal modelling was conducted for a range of thermal parameters, including the effects of exhumation and incorporating current information about the crustal architecture. The results show that tectonic thickening of the sedimentary pile to -40 km, consistent with present-day thickness estimates and erosional levels, is capable of producing enough crustal heating to melt the base of the sedimentary pile, advect heat to shallower crustal levels, and produce the observed P-T conditions. Deep-seated mantle heat sources, though not excluded, are not required.

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Structure and stratigraphy of the south flank of the Kisseynew Domain in the Trans-Hudson Orogen, Manitoba: implications for 1.845-1.77 Ga collision tectonics

Cited by 8 publications

References 0 publications

Surface heat flow, crustal temperatures and mantle heat flow in the Proterozoic Trans‐Hudson Orogen, Canadian Shield

Surface heat flow, crustal temperatures and mantle heat flow in the Proterozoic Trans‐Hudson Orogen, Canadian Shield

Evidence for voluminous bimodal pyroclastic volcanism during rifting of a Paleoproterozoic arc at Snow Lake, Manitoba

High-temperature, low-pressure metamorphism in the Kisseynew domain, Trans-Hudson orogen: crustal anatexis due to tectonic thickening?

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