title: The De Long Islands: A missing link in unraveling the Paleozoic paleogeography of the Arctic
metadata.name: dc.contributor.author
metadata.value: Ершова, Виктория Бэртовна
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2020-09-08T16:34:56Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2020-09-08T16:34:56Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2016
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/19287
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The vast Laptev and East Siberian shelves in the eastern Russian Arctic, largely covered by a shallow sea and
  buried beneath sea ice for 9 months of the year, remain one of the least studied parts of continental crust of
  the Earth and represent a big unknown when performing pre-Cenozoic reconstructions of the Arctic. The De
  Long Islands provide an important window into the geology of this area and are a key for understanding the
  Early Paleozoic history of the Amerasian Arctic. Four of them(Jeannette, Henrietta, Bennett and Zhokhov islands)
  were studied using structural data, petrographic and geochemical analyses and U–Pb zircon age dating to offer
  the following new constraints for the Early Paleozoic paleogeography of the Arctic realm. The basement beneath
  the De Long Islands is of Late Neoproterozoic to earliest Cambrian age, about 670–535Ma. In the Early Paleozoic,
  the De Long Islandswere located along the broad Timanian margin of Baltica,with a clastic sediment provenance
  fromthe Timanian, Grenville–Sveconorwegian, and Baltic Shield domains. The Cambro-Ordovician volcaniclastic
  successions on Jeannette and Henrietta islands formed part of a continental volcanic arc with a corresponding
  back-arc basin located to the south (in present co-ordinates). On the continent-ward side of the back-arc
  basin, shallowmarine shelf clastic and carbonate rocks were deposited, which are exposed today on Bennett Island
  in the south-west of the archipelago (in modern coordinates). The De Long Islands together with other continental
  blocks, such as Severnaya Zemlya, Arctic Alaska–Chukotka, and the Alexander Terrane, formed the contiguous active
  continental margin of Baltica during the Early Paleozoic. Today however, these terranes are spread out over a
  distance of 5000 km across the Arctic and eastern Pacific margins due to the subsequent opening of a series of
  Late Paleozoic, Mesozoic and Cenozoic oceanic basins.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: en
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: Elsevier
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: The De Long Islands: A missing link in unraveling the Paleozoic paleogeography of the Arctic
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: Ershova-et-al-2016-GR.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/19287/1/Ershova-et-al-2016-GR.pdf
resources.format: Adobe PDF
resources.size: 3,57 MB