Neoarchean and Paleoproterozoic crystalline basement rocks of north-central Idaho: Constraints on the formation of western Laurentia

Vervoort, Jeffrey D.; Lewis, Reed S.; Fisher, Colleen; Gaschnig, Richard M.; Jansen, Andrew C.; Brewer, Rachel

doi:10.1130/b31150.1

Cited by 13 publications

(19 citation statements)

References 69 publications

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“…These data indicate that the distinctive ~1. Neoarchean rocks ranging in age from 2.67-2.65 Ga and Paleoproterozoic intrusions with ages of 1.88-1.84 Ga (Fisher et al, 2013(Fisher et al, , 2014Wang et al, 2014;Vervoort et al, 2016b). The ~1.86 Ga Idaho orthogneisses have a wide range of initial Hf , from about -8 to +8 (Fig.…”

Section: Age and Isotopic Comparison With Australia And Laurentiamentioning

confidence: 99%

Proterozoic crustal evolution of central East Antarctica: Age and isotopic evidence from glacial igneous clasts, and links with Australia and Laurentia

Goodge

Fanning

Fisher

et al. 2017

Precambrian Research

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Rock clasts entrained in glacial deposits sourced from the continental interior of Antarctica provide an innovative means to determine the age and composition of ice-covered crust. Zircon U-Pb ages from a suite of granitoid clasts collected in glacial catchments draining central East Antarctica through the Transantarctic Mountains show that crust in this region was formed by a series of magmatic events at

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Section: Age and Isotopic Comparison With Australia And Laurentiamentioning

confidence: 99%

Proterozoic crustal evolution of central East Antarctica: Age and isotopic evidence from glacial igneous clasts, and links with Australia and Laurentia

Goodge

Fanning

Fisher

et al. 2017

Precambrian Research

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“…Instead, the present-day exposure of these orogens is probably related to more recent tectonics. For example, the apparently north-trending Trans-North China Orogen is primarily exposed along Mesozoic-Cenozoic rift shoulders that are bounded by thick rift-related strata (e.g., Davis et al, 1996Davis et al, , 2001Graham et al, 2012 America is undergoing a similar renaissance; orogens that were once considered narrow deformational belts are increasingly being reinterpreted as parts of broader zones of intracontinental deformation (e.g., Vervoort et al, 2016). We do not attempt to further interpret the Archean-Paleoproterozoic North China orogens, and for the purpose of our reconstruction, the North China craton is assumed to have been established by ca.…”

Section: North Chinamentioning

confidence: 99%

“…The ca. 1.85 Ga Trans-North China orogen and Great Falls tectonic zone of western Laurentia (e.g., Gorman et al, 2002;Ross and Eaton, 2002;Mueller et al, 2002;Foster et al, 2006;Vervoort et al, 2016) have similar arc-subduction-collision histories that accommodated the convergence of Archean blocks. Archean crust in the Tarim craton is correlative to those found in western Laurentia (Foster et al, 2006;Long et al, 2010;Ge et al, 2014).…”

Section: Paleoproterozoic Subduction and Collisionmentioning

confidence: 99%

Balkatach hypothesis: A new model for the evolution of the Pacific, Tethyan, and Paleo-Asian oceanic domains

Zuza

Yin

2017

Geosphere

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The Phanerozoic history of the Paleo-Asian, Tethyan, and Pacific oceanic domains is important for unraveling the tectonic evolution of the Eurasian and Laurentian continents. The validity of existing models that account for the development and closure of the Paleo-Asian and Tethyan Oceans critically depends on the assumed initial configuration and relative positions of the Precambrian cratons that separate the two oceanic domains, including the North China, Tarim, Karakum, Turan, and southern Baltica cratons. Existing studies largely neglect the Phanerozoic tectonic modification of these Precambrian cratons (e.g., the effects of India-Arabia-Eurasia convergence and post-Rodinia rifting). In this work we systematically restore these effects and evaluate the tectonic relationships among these cratons to test the hypothesis that the Baltica, Turan, Karakum, Tarim, and North China cratons were linked in the Neoproterozoic as a single continental strip, with variable along-strike widths. Because most of the tectonic boundaries currently separating these cratons postdate the closure of the Paleo-Asian and Tethyan Oceans, we are able to establish a >6000-km-long Neoproterozoic contiguous continent referred to here as Balkatach (named from the Baltica-Karakum-Tarim-North China connection). By focusing on the regional geologic history of Balkatach's continental margins, we propose the following tectonic model for the initiation and evolution of the Paleo-Asian, Tethyan, and Pacific oceanic domains and the protracted amalgamation and growth history of the Eurasian continent. (1) The early Neoproterozoic collision of the combined Baltica-Turan-Karakum-South Tarim continents with the linked North Tarim-North China cratons led to the formation of a coherent Balkatach continent. (2) Rifting along Balkatach's margins in the late Neoproterozoic resulted in the opening of the Tethyan Ocean to the south and unified Paleo-Asian and Pacific Oceans to the north (present-day coordinates). This process led to the detachment of Balkatach-derived microcontinents that drifted into the newly formed Paleo-Asian Ocean. (3) The rifted microcontinents acted as nuclei for subduction systems whose development led to the eventual demise of the Paleo-Asian Ocean during the formation of the Central Asian Orogenic System (CAOS). Closure of this ocean within an archipelago-arc subduction system was accommodated by counterclockwise rotation of the Balkatach continental strip around the CAOS. (4) Initial collision of central Balkatach and the amalgamated arcs and microcontinents of the CAOS in the mid-Carboniferous was followed by a bidirectional propagation of westward and eastward suturing. (5) The closure of the Paleo-Asian Ocean in the early Permian was accompanied by a widespread magmatic flare up, which may have been related to the avalanche of the subducted oceanic slabs of the Paleo-Asian Ocean across the 660 km phase boundary in the mantle. (6) The closure of the Paleo-Tethys against the southern margin of Balkatach proceeded diachronously, fr...

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“…In comparison, potential sources of Precambrian zircons in northwestern Laurentia include the Belt Supergroup and fragments of 2.7-2.4 Ga Archean terranes, all of which have been largely obscured by the Idaho Batholith and younger cover rocks (Foster et al, 2006;Gaschnig et al, 2013, Vervoort et al, 2016. The detrital zircons of Mesoproterozoic Belt Supergroup have ages that are dominantly between 1.82 and 1.68 Ga and form a ca.…”

Section: Upper Cretaceous Unitsmentioning

confidence: 99%

Evolution of the Jura-Cretaceous North American Cordilleran margin: Insights from detrital-zircon U-Pb and Hf isotopes of sedimentary units of the North Cascades Range, Washington

et al. 2017

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The U-Pb age and Hf-isotope composition of detrital zircons from Jurassic to Upper Cretaceous sedimentary rocks adjacent to the southern North Cascades-Coast Plutonic Complex continental magmatic arc document shifting provenance, the tectonic evolution of the arc system, and translation along the continental margin. Systematic changes in the detrital-zircon data provide insight that the western margin of North America evolved from: marginal basins adjacent to continent-fringing oceanic arcs (ca. 160-140 Ma); forearc basins adjacent to mid-Cretaceous (ca. 120-90 Ma) Andean-type continental arcs; and addition of a cratonic source to forearc and accretionary wedge units to Cordilleran arc systems in the mid-Late Cretaceous (ca. 85 Ma). Jurassic Methow terrane, Nooksack Formation, and western mélange belt units dominantly contain detrital zircons derived from accreted oceanic terranes, whereas Lower Cretaceous strata from the same units have age peaks that correspond to known pulses of magmatism in Cordilleran continental magmatic arc systems. The age peaks and Hf-isotope signature of the Jurassic and Lower Cretaceous strata are comparable to multiple sources exposed along the margin. In contrast, the Upper Cretaceous western mélange belt has distinct Precambrian zircon populations and unradiogenic Late Cretaceous zircons that are more similar to southwestern than northwestern Laurentian sources. Statistical comparisons confirm provenance similarities between rocks of the North Cascades and those 700-2000 km to the south and, thus, support marginparallel translation from as far as the latitude of southern California.

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Neoarchean and Paleoproterozoic crystalline basement rocks of north-central Idaho: Constraints on the formation of western Laurentia

Cited by 13 publications

References 69 publications

Proterozoic crustal evolution of central East Antarctica: Age and isotopic evidence from glacial igneous clasts, and links with Australia and Laurentia

Proterozoic crustal evolution of central East Antarctica: Age and isotopic evidence from glacial igneous clasts, and links with Australia and Laurentia

Balkatach hypothesis: A new model for the evolution of the Pacific, Tethyan, and Paleo-Asian oceanic domains

Evolution of the Jura-Cretaceous North American Cordilleran margin: Insights from detrital-zircon U-Pb and Hf isotopes of sedimentary units of the North Cascades Range, Washington

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