Journal cover Journal topic
Stephan Mueller Special Publication Series An open-access serial publication for refereed proceedings and special publications
Journal topic
Articles | Volume 4
Stephan Mueller Spec. Publ. Ser., 4, 35–44, 2009
Stephan Mueller Spec. Publ. Ser., 4, 35–44, 2009

  17 Sep 2009

17 Sep 2009

Geology of the Shelves surrounding the New Siberian Islands, Russian Arctic

D. Franke and K. Hinz D. Franke and K. Hinz
  • Federal Institute for Geosciences and Natural Resources (BGR), P.O. Box 510153, 30631 Hannover, Germany

Abstract. A total of 11 700 km of multichannel seismic reflection data were acquired during recent reconnaissance surveys of the wide, shallow shelves of the Laptev and western East Siberian Seas around the New Siberian Islands. To the north of the Laptev Sea, the Gakkel Ridge, an active mid-ocean ridge which separates the North American and Eurasian Plates, meets abruptly the steep slope of the continental shelf. Extension has affected the Laptev Shelf since at least the Early Tertiary and has resulted in the formation of three major, generally north-south trending rift basins: the Ust' Lena Rift, the Anisin Basin, and the New Siberian Basin. Our data indicate that the rift basins on the Laptev Shelf are not continuous with those on the East Siberian Shelf. The latter shelf can best be described as an epicontinental platform which has undergone continuous subsidence since the Late Cretaceous. The greatest subsidence occurred in the NE, manifested by a major depocentre filled with inferred (?)Late Cretaceous to Tertiary sediments up to 5 s (twt) thick. On the basis of deep reflection data we revise and adjust Mesozoic domain boundaries around the New Siberian Islands.

Publications Copernicus