Surface heat flow measurements from the East Siberian continental slope and southern Lomonosov Ridge, Arctic Ocean
Number of Authors: 5
2016 (English)In: Geochemistry Geophysics Geosystems, ISSN 1525-2027, E-ISSN 1525-2027, Vol. 17, no 5, 1608-1622 p.Article in journal (Refereed) Published
Surface heat flow data in the Arctic Ocean are needed to assess hydrocarbon and methane hydrate distributions, and provide constraints into the tectonic origins and nature of underlying crust. However, across broad areas of the Arctic, few published measurements exist. This is true for the outer continental shelf and slope of the East Siberian Sea, and the adjoining deep water ridges and basins. Here we present 21 new surface heat flow measurements from this region of the Arctic Ocean. On the Southern Lomonosov Ridge, the average measured heat flow, uncorrected for effects of sedimentation and topography, is 574 mW/m(2) (n=4). On the outer continental shelf and slope of the East Siberian Sea (ESS), the average is 5710 mW/m(2) (n=16). An anomalously high heat flow of 20328 mW/m(2) was measured at a single station in the Herald Canyon. With the exception of this high heat flow, the new data from the ESS are consistent with predictions for thermally equilibrated lithosphere of continental origin that was last affected by thermotectonic processes in the Cretaceous to early Cenozoic. Variability within the data likely arises from differences in radiogenic heat production within the continental crust and overlying sediments. This can be further explored by comparing the data with geophysical constraints on sediment and crustal thicknesses.
Place, publisher, year, edition, pages
2016. Vol. 17, no 5, 1608-1622 p.
heat flow, Arctic Ocean, East Siberian Sea, Lomonosov Ridge, Herald Canyon
Earth and Related Environmental Sciences
IdentifiersURN: urn:nbn:se:su:diva-132511DOI: 10.1002/2016GC006284ISI: 000379525100003OAI: oai:DiVA.org:su-132511DiVA: diva2:952945