Provenance and paleogeography of the Neruokpuk Formation, northwest Laurentia: An integrated synthesis

Lane, L S; Gehrels, George E.; Layer, Paul W.

doi:10.1130/b31234.1

Cited by 18 publications

(33 citation statements)

References 70 publications

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“…The rotational model is not universally accepted, however, and a wide variety of alternative models exist (Lane, ; Lane et al, , Lawver & Scotese, ). A problem with many opening models, and particularly the rotational model, is explaining the location and shape of Chukchi Borderland, a submerged marginal plateau north of Alaska consisting of the Chukchi Plateau, Northwind Ridge, and internal basins.…”

Section: Introductionmentioning

confidence: 99%

Significance of Northeast‐Trending Features in Canada Basin, Arctic Ocean

Hutchinson

Jackson

Houseknecht

et al. 2017

Geochem Geophys Geosyst

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Synthesis of seismic velocity, potential field, and geological data from Canada Basin and its surrounding continental margins suggests that a northeast‐trending structural fabric has influenced the origin, evolution, and current tectonics of the basin. This structural fabric has a crustal origin, based on the persistence of these trends in upward continuation of total magnetic intensity data and vertical derivative analysis of free‐air gravity data. Three subparallel northeast‐trending features are described. Northwind Escarpment, bounding the east side of the Chukchi Borderland, extends ∼600 km and separates continental crust of Northwind Ridge from high‐velocity transitional crust in Canada Basin. A second, shorter northeast‐trending zone extends ∼300 km in northern Canada Basin and separates inferred continental crust of Sever Spur from magmatically intruded crust of the High Arctic Large Igneous Province. A third northeast‐trending feature, here called the Alaska‐Prince Patrick magnetic lineament (APPL) is inferred from magnetic data and its larger regional geologic setting. Analysis of these three features suggests strike slip or transtensional deformation played a role in the opening of Canada Basin. These features can be explained by initial Jurassic‐Early Cretaceous strike slip deformation (phase 1) followed in the Early Cretaceous (∼134 to ∼124 Ma) by rotation of Arctic Alaska with seafloor spreading orthogonal to the fossil spreading axis preserved in the central Canada Basin (phase 2). In this model, the Chukchi Borderland is part of Arctic Alaska.

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Section: Introductionmentioning

confidence: 99%

Significance of Northeast‐Trending Features in Canada Basin, Arctic Ocean

Hutchinson

Jackson

Houseknecht

et al. 2017

Geochem Geophys Geosyst

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“…The Neruokpuk Formation overlies a highly deformed and poorly studied mixed carbonate-siliciclastic succession ( Fig. 3), now recognized as the informal Firth River group in the northern British Mountains of Yukon (Lane et al, 2016). In Alaska, the Firth River group includes sequence D and E of Dutro et al (1972), Domain III of Mull and Anderson (1991), and various carbonate and fine-grained siliciclastic units of Reiser et al (1980).…”

Section: Introductionmentioning

confidence: 99%

“…A commonly accepted model is that pre-Mississippian strata of the northeastern (NE) Brooks Range were deposited along a Neoproterozoic-Early Devonian passive margin that developed north (in present coordinates) of the Yukon block of northwest Laurentia (Fig. 1), before being deformed in the Early-Middle Devonian Romanzof orogeny (e.g., Lane, 1991Lane, , 2007Moore et al, 1994;Cecile et al, 1999;Colpron and Nelson, 2011;Beranek et al, 2010;Lane et al, 2016). In contrast, others have argued that the North Slope has pre-Mississippian origins in northeast Laurentia, and that it did not attain its pre-Canada Basin position until sometime before the Late Devonian or Early Mississippian (Sweeney, 1982;Dumoulin et al, 2000;Macdonald et al, 2009;Strauss et al, 2013;Cox et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Resolving these conflicting interpretations has broad implications for Neoproterozoic-Paleozoic plate reconstructions of the circum-Arctic region and Caledonian-Appalachian orogeny (Strauss et al, 2013); thus, our objective is to present new data pertaining to the structural and stratigraphic evolution of pre-Mississippian rocks in the NE Brooks Range to directly address these competing models. Lane et al, 2016; see Table DR1 in the GSA Data Repository 1 for a summary of age constraints on pre-Mississippian units of the NE Brooks Range). The Neruokpuk Formation overlies a highly deformed and poorly studied mixed carbonate-siliciclastic succession ( Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Both of these samples were collected from isolated talus slopes, so their stratigraphic positions within the greater pre-Mississippian succession remain somewhat ambiguous. Lane et al (2016) split these early Paleozoic units of northern Yukon into two general lithostratigraphic successions: a lower graptolitic-bearing succession of interbedded chert and argillite, and an upper dark gray shale and sandstone turbidite package with subordinate chertpebble conglomerate and limestone. The base of the lower succession is marked by a ridge-forming chert interval that contains Lower Ordovician graptolites (Lane and Cecile, 1989).…”

Section: Introductionmentioning

confidence: 99%

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Detrital geochronology of pre-Mississippian strata in the northeastern Brooks Range, Alaska: Insights into the tectonic evolution of northern Laurentia

et al. 2016

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The Arctic Alaska terrane of northern Alaska and Yukon is one of several exotic terranes in the North American Cordillera with putative early Paleozoic connections to the northern Caledonian-Appalachian orogen. The U-Pb and 40 Ar/ 39 Ar isotopic data from detrital minerals in pre-Mississippian sedimentary units of the northeastern Brooks Range are presented here to investigate the consequences of Caledonian orogenesis on sediment dispersal trends and the paleogeography of northern Laurentia. Neoproterozoic-Cambrian siliciclastic rocks of the informal Firth River group and the Neruokpuk Formation were most likely deposited along a passive margin that sourced Archean and Paleoproterozoic basement rocks of the Canadian shield and reworked Mesoproterozoic and younger sedimentary units. These strata are overlain by a Lower Ordovician-Lower Devonian succession of fine-grained siliciclastic turbidites, herein referred to as the Clarence River group, which records a prominent shift in provenance most likely associated with the onset of the Caledonian-Appalachian orogeny in northeast Laurentia. U-Pb detrital zircon age populations of ca. 470-420 and 990-820 Ma, along with 40 Ar/ 39 Ar detrital muscovite ages of ca. 470-430 Ma, support provenance connections with the East Greenland Caledonides, Pearya, and Svalbard. Partially reset 40 Ar/ 39 Ar ages in these sedimentary successions are linked to low-grade metamorphism associated with the Early-Middle Devonian Romanzof orogeny, a poorly understood tectonic event in the Brooks Range that is possibly associated with the emplacement of an allochthonous oceanic assemblage, herein named the Whale Mountain allochthon.

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