Heat Flow Distribution in the Chukchi Borderland and Surrounding Regions, Arctic Ocean

The Canada Basin (CB) formed during a short period of seafloor spreading inferred to be Early Cretaceous in age. Brookian strata of inferred Early Cretaceous to Holocene age comprise the sedimentary fill of the Canada Basin Tectono-Sedimentary Element (CB TSE). Although the CB has remained tectonically quiet since seafloor spreading ceased, both proximal and distal tectonism (Alpha Ridge magmatism, and the Cordilleran, Brooks Range, and Eurekan orogenies) have influenced sediment source areas, dispersal paths, and thicknesses in the basin. In the Neogene, the dominant source of sediments is the Mackenzie River which drains northern portions of the Cordilleran orogen. The CB TSE is one of the most remote and challenging places on Earth to explore. Although regional seismic reflection and refraction data exist, there are no boreholes to constrain interpretations. Existing estimates of hydrocarbon potential range from limited (Houseknecht et al. 2020) to moderate (Grantz and Hart, 2012) to significant (Dietrich et al., 2018).

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Anisotropic Characterization of the Chukchi Boardland Based on Ocean-Bottom Seismic Experiment during N11-CHINARE

Xing,

Xu,

Gong

et al. 2024

Seismological Research Letters

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The current research focus at Chukchi Boardland (CB) revolves around sediment stratification and crustal structure, but investigations into deep stress fields and mantle dynamics are limited. This article presents a study on the anisotropic characteristics of the CB. Shear-wave splitting measurements were conducted using the transverse energy minimization at six stations recovered from the 11th Chinese National Arctic Research Expedition. The observation period for these six stations ranged from 2 August 2020 to 8 September 2020. The results demonstrate significant anisotropy within the CB, with the fast shear-wave polarization direction ranging from N60°E to N70°E. The time delays between fast and slow shear waves were found to be ∼0.7 s. By comparing the anisotropy observed at the CB with that at land stations in Arctic Alaska, this study suggested that the genesis of anisotropy beneath the CB was related to the formation of the Amerasian basin. The tectonic processes of rifting during basin evolution and midocean ridge spreading led to the development of anisotropy in the lithosphere beneath the CB during expansion.

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Heat Flow Distribution in the Chukchi Borderland and Surrounding Regions, Arctic Ocean

Cited by 3 publications

References 54 publications

Heat Flow at the Eurasian Margin: A Case Study for Estimation of Gas Hydrate Stability

Heat Flow at the Eurasian Margin: A Case Study for Estimation of Gas Hydrate Stability

Canada Basin Tectono-Sedimentary Element, Arctic Ocean

Anisotropic Characterization of the Chukchi Boardland Based on Ocean-Bottom Seismic Experiment during N11-CHINARE

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