Age, distribution and style of deformation in Alaska north of 60°N: Implications for assembly of Alaska

Moore, Thomas E.; Box, Stephen E.

doi:10.1016/j.tecto.2016.06.025

Cited by 48 publications

(57 citation statements)

References 157 publications

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“…APPL, possibly defining a southern boundary to the zone of transtension may be a continuation of the rift transfer zone faults proposed at the south end of the Sverdrup Basin (Hadlari et al, ). The Cretaceous (ancestral) phase of Brooks Range orogeny would have been fully developed during this rift stage as the Angayucham Ocean south of Alaska (current coordinates) closed (e.g., Moore et al, ; Moore & Box, , and references therein).…”

Section: Discussionmentioning

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: Discussionmentioning

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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“…A Paleogene episode of thick‐skinned deformation formed large‐scale duplex structures in the northeastern Brooks Range and is coeval with accretionary deformation in the forearc in southern Alaska and right‐lateral strike‐slip faulting in the interior (Fuis et al, ; Wallace, ). This synchronicity suggests that these structures may be linked by a detachment (Moore & Box, ).…”

Section: Geologic and Tectonic Settingmentioning

confidence: 99%

The August 2018 Kaktovik Earthquakes: Active Tectonics in Northeastern Alaska Revealed With InSAR and Seismology

Gaudreau

Nissen

Bergman

et al. 2019

Geophysical Research Letters

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The largest earthquakes recorded in northern Alaska ( Mnormalw 6.4 and Mnormalw 6.0) occurred ∼6 hr apart on 12 August 2018, in the northeastern Brooks Range. The earthquakes were captured by Sentinel‐1 interferometric synthetic aperture radar (InSAR) satellites and Earthscope Transportable Array seismic data, giving insight into the little‐known active tectonic processes of Arctic Alaska, obscured until recently by sparse data availability. In this study, InSAR modeling, teleseismic back projections, calibrated hypocentral relocations, and regional moment tensor solutions resolve two previously unknown, SSW dipping right‐lateral fault segments. These are the first active faults identified as conjugate to the NE trending sinistral Canning displacement zone directly to the west, which is therefore a more complex zone of diffuse faulting than previously thought. The northeastern Brooks Range has been characterized as an area of low to moderate seismic hazard, but these earthquakes illustrate the potential for larger, possibly destructive events in a region earmarked for rapid resource development.

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“…The 294 metamorphic rocks of the Ruby terrane consist primarily of Proterozoic(?) to Paleozoic 295 metasedimentary rocks and minor metabasite and quartzofeldspathic gneiss (Dover, 296 1994;Moore and Box, 2016). Thermobarometry by Roeske et al (1995) identified an 297 14 overprinted by greenschist facies assemblages.…”

Section: Ruby Terrane 292mentioning

confidence: 99%

Provenance, U-Pb detrital zircon geochronology, Hf isotopic analyses, and Cr-spinel geochemistry of the northeast Yukon-Koyukuk Basin: Implications for interior basin development and sedimentation in Alaska

et al. 2017

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21The Yukon Koyukuk Basin is a large depression that covers ~118,000 sq. km in 22 western interior Alaska that is divided into two sub-basins by a volcanic arc assemblage. Sedimentary basins that flank orogenic belts serve as archives that record the 58 long-term deformational and uplift history of orogenic systems. When associated with a 59 topographic effect, the kinematic evolution of an orogen affects the geometry, filling 60 pattern, and provenance signature of the adjacent synorogenic sedimentary basins 61 (Bayona, et al., 2008). Processes such as tectonic uplift and surficial denudation, rainfall, 62 sediment supply, sediment transport and dispersal have direct implications on the 63 evolution of synorogenic sediment routing systems (Whitchurch et al., 2011). As 64 observed in several Cenozoic orogenic belts (e.g. Himalayas and Andes), differences in 65 sedimentary filling patterns are recognizable by variations in large-scale axial and 66 transverse river systems and smaller transverse rivers observed draining into and within 67 the foreland and hinterland basins separated by an orogenic high (Burbank et al., 1996; 68 Clark et al., 2004; DeCelles, 2012; Dietze et al., 2014; Hessler and Fildani, 2015). This 69 4 variation in drainage systems leads to differences in provenance signatures recorded 70 within the basin sediments (Lease et al., 2007; Bayona, et al., 2008; Cina, et al., 2009; 71 DeCelles et al., 2014). Therefore, the provenance signature of the sediments that occupy 72 these basins should help in understanding the evolution of the synorogenic sediment 73 routing systems on either side of the orogen. 74In northern Alaska, the latest Jurassic -Early Cretaceous Brooks Range orogen is 75 flanked by two synorogenic sedimentary basins, the northern Colville foreland basin and 76 southern Yukon Koyukuk Basin (Fig. 1). Renewed deposition of thick successions of 77 clastic rocks in the Colville Basin occurred coincidently with the formation of Yukon 78Koyukuk Basin, which led authors to conclude that these events were the result of 79 orogenic uplift of the Brooks Range (Molenaar et al., 1984(Molenaar et al., , 1986 Miller and Hudson, 80 1991;Till, 1992). Seismic reflection data collected within the Colville Basin delineate a 81 series of turbidite-dominated sedimentary packages that longitudinally filled the basin 82 from west to northeast from the late Early Cretaceous to the Cenozoic (Houseknecht et 83 al., 2009; Houseknecht and Wartes, 2013). Despite all the work performed in 84 characterizing the clastic rocks of the Colville Basin, little emphasis has been paid to 85 understanding the formation and sedimentary evolution of the southern Yukon Koyukuk 86 Basin. 87The Yukon Koyukuk Basin is a large wedge-shaped physiographic depression, 88 underlain by volcanic and marine sedimentary rock units, that covers ~118,000 sq. km 89 (Fig. 1) formed in a syn-collisional forearc setting (Till et al., 1993) to its formation during post-95 accretion lithospheric extension of the hinterlan...

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Age, distribution and style of deformation in Alaska north of 60°N: Implications for assembly of Alaska

Cited by 48 publications

References 157 publications

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

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

The August 2018 Kaktovik Earthquakes: Active Tectonics in Northeastern Alaska Revealed With InSAR and Seismology

Provenance, U-Pb detrital zircon geochronology, Hf isotopic analyses, and Cr-spinel geochemistry of the northeast Yukon-Koyukuk Basin: Implications for interior basin development and sedimentation in Alaska

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