Characterization of the Paleoproterozoic Hottah terrane, Wopmay Orogen using multi-isotopic (U-Pb, Hf and O) detrital zircon analyses: An evaluation of linkages to northwest Laurentian Paleoproterozoic domains

Davis, W J; Ootes, Luke; Newton, Lucy; Jackson, Valerie A.; Stern, Richard A.

doi:10.1016/j.precamres.2015.08.012

Cited by 24 publications

(24 citation statements)

References 39 publications

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“…2.5 Ga, the maximum T DM age (Table 3). Assuming a continental arc setting, which is consistent with the detrital zircon Hf and ␦ 18 O results in the Hottah terrane (Davis et al 2015), this data requires that the Hottah basement is made up of either juvenile Neoarchean crust or Neoarchean crust that was recycled in the Proterozoic, not juvenile Paleoproterozoic crust.…”

Section: Whence Came Hottah Terrane?mentioning

confidence: 53%

“…1876 Ma (Bowring 1984;Hildebrand et al 2010a;Jackson et al 2013). In addition, detrital zircons and Nd and Pb isotope data do not support that the Hottah terrane was built on attenuated Slave craton crust (Bowring and Podosek 1989;Housh et al 1989;Hildebrand et al 2010a;Davis et al 2015). The simple marginal basin model entirely within Slave crust, depicted in Fig.…”

Section: Whence Came Hottah Terrane?mentioning

confidence: 91%

“…The white diamond is the U-Pb sample location of Hottah plagioclase-quartz porphyry (Hp; Figs. 2B, 5B; Table 1); the black diamond is the detrital zircon sample location of Conjuror Bay Formation quartz arenite (Davis et al 2015). View is to the north; person for scale is circled.…”

Section: Figmentioning

confidence: 99%

“…Previously reported ages are italicized and from Bowring (1984), Reichenbach (1991), Gandhi et al (2001), and Bennett and Rivers (2006a). The detrital zircon (DZ) maximum depositional ages for the Holly Lake metamorphic complex are from Davis et al (2015), and the Treasure Lake Group are from Gandhi and van Breemen (2005) and Bennett and Rivers (2006b). For Archean basement ages see Jackson et al (2013) and Bowring (1984).…”

Section: Stratigraphy and Petrological Evolutionmentioning

confidence: 99%

“…It is not known if there is any place where the Treasure Lake Group is in contact with the older Bell Island Bay Group, Hottah plutonic complex, or Holly Lake metamorphic complex. The Treasure Lake Group contains older Archean detrital zircons with ages typical of the Slave craton, in addition to 2.33-2.26 Ga detrital zircons that were attributed to a Hottah terrane source (Gandhi and van Breemen 2005); however, such ages are also characteristic of Paleoproterozoic tectonic events recorded in the western Rae craton (e.g., Davis et al 2015).…”

Section: Stratigraphy and Petrological Evolutionmentioning

confidence: 99%

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Chronostratigraphy of the Hottah terrane and Great Bear magmatic zone of Wopmay Orogen, Canada, and exploration of a terrane translation model

et al. 2015

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Abstract:The Paleoproterozoic Hottah terrane is the westernmost exposed bedrock of the Canadian Shield and a critical component for understanding the evolution of the Wopmay Orogen. Thirteen new high-precision U-Pb zircon crystallization ages are presented and support field observations of a volcano-plutonic continuum from Hottah terrane through to the end of the Great Bear magmatism, from >1950 to 1850 Ma. The new crystallization ages, new geochemical data, and newly published detrital zircon U-Pb data are used to challenge hitherto accepted models for the evolution of the Hottah terrane as an exotic arc and microcontinent that arrived over a west-dipping subduction zone and collided with the Slave craton at ca. 1.88 Ga. Although the Hottah terrane does have a tectonic history that is distinct from that of the neighbouring Slave craton, it shares a temporal history with a number of domains to the south and east -domains that were tied to the Slave craton by ca. 1.97 Ga. It is interpreted herein that Hottah terrane began to the south of its current position and evolved in an active margin over an always east-dipping subduction system that began prior to ca. 2.0 Ga and continued to ca. 1.85 Ga, and underwent tectonic switching and migration. The stratigraphy of the ca. 1913-1900 Ma Hottah plutonic complex and Bell Island Bay Group includes a subaerial rifting arc sequence, followed by basinal opening represented by marginal marine quartz arenite and overlying ca. 1893 Ma pillowed basalt flows and lesser rhyodacites. We interpret this stratigraphy to record Hottah terrane rifting off its parental arc crust -in essence the birth of the new Hottah terrane. This model is similar to rapidly rifting arcs in active margins -for example, modern Baja California. These rifts generally occur at the transition between subduction zones (e.g., Cocos-Rivera plates) and transtensional shear zones (e.g., San Andreas fault), and we suggest that extension-driven transtensional shearing, or, more simply, terrane translation, was responsible for the evolution of Bell Island Bay Group stratigraphy and that it transported this newly born Hottah terrane laterally (northward in modern coordinates), arriving adjacent to the Slave craton at ca. 1.88 Ga. Renewed east-dipping subduction led to the Great Bear arc flare-up at ca. 1876 Ma, continuing to ca. 1869 Ma. This was followed by voluminous Great Bear plutonism until ca. 1855 Ma. The model implies that it was the westerly Nahanni terrane and its subducting oceanic crust that collided with this active margin, shutting down the >120 million year old, east-dipping subduction system.

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Section: Whence Came Hottah Terrane?mentioning

confidence: 53%