Main Structural Elements of Eastern Russian Arctic Continental Margin Derived from Satellite Gravity and Multichannel Seismic Reflection Data

Drachev, Sergey S.; Johnson, G. Leonard; Laxon, Seymour W.; McAdoo, D. C.; Kassens, Heidemarie

doi:10.1007/978-3-642-60134-7_50

Cited by 27 publications

(30 citation statements)

References 13 publications

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“…1). It is well imaged in compilations of potential field data (MacNab, 1993;Verhoef et al, 1996;Laxon and McAdoo, 1994;Drachev et al, 1999;Piskarev et al, 2001; Fig. 2).…”

Section: Structural Features and Dominant Tectonic Style Of The East mentioning

confidence: 60%

“…There is convincing evidence from geophysical data that the rift basins of the Laptev Shelf terminate to the north against a major northeast to southwest trending tectonic boundary defined by as Severnyi Transfer (Fig. 1), also named Northern Fracture by Drachev et al (1998Drachev et al ( , 1999. This lineament may explain the linkage between the opening by seafloor spreading of the Eurasia Basin and extension of the Laptev Shelf.…”

Section: Discussionmentioning

confidence: 91%

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

Franke

Hinz

2009

Stephan Mueller Spec. Publ. Ser.

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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.

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“…1). It is well imaged in compilations of potential field data (MacNab, 1993;Verhoef et al, 1996;Laxon and McAdoo, 1994;Drachev et al, 1999;Piskarev et al, 2001; Fig. 2).…”

Section: Structural Features and Dominant Tectonic Style Of The East mentioning

confidence: 60%

Section: Discussionmentioning

confidence: 91%

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

Franke

Hinz

2009

Stephan Mueller Spec. Publ. Ser.

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“…The location of G11 coincides with a major SW-NE trending transfer or strike-slip fault, namely the Sever'nyi Transfer or Northern Fracture (e.g. Drachev et al, 1998Drachev et al, , 1999Franke et al, 2001). This fault may also provide a pathway for upward migrating gas.…”

Section: Gas Seeps In the Northern Laptev Seamentioning

confidence: 98%

“…Srivastava and Tapscott, 1986;Kristoffersen, 1990;Jackson and Gunnarsson, 1990). The resulting extensional regime led to the development of a series of sedimentary basins on the Laptev Sea shelf (Drachev et al, 1998(Drachev et al, , 1999Sekretov, 2000;Franke et al, 2001). These basins are filled with predominantly Cenozoic sedimentary rocks which are 10km or more thick.…”

Section: Introductionmentioning

confidence: 99%

Indications for an Active Petroleum System in the Laptev Sea, Ne Siberia

Cramer

Franke

2005

J Petroleum Geol

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“…3). This region historical Cenozoic events are related because the North American and Eurasian plates are separated in the Eurasian Basin by the active mid-oceanic Gakkel Ridge, resulting in partial destruction of the continental crust over vast areas (Vinogradov and Drachev, 2000;Franke et al, 2001;Drachev et al, 1998Drachev et al, , 1999Imaev et al, 2004). As a result of stretching during the Pliocene-Quaternary, the graben borders formed young listric faults displacing the weathering crusts of the Neogene age, which are also well known along the Buor-Khaya Gulf coast (Figs.…”

Section: Sgd Discharge Calculationmentioning

confidence: 74%

Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: a case study in the Buor-Khaya Gulf, Laptev Sea

et al. 2017

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Abstract. It has been suggested that increasing terrestrial water discharge to the Arctic Ocean may partly occur as submarine groundwater discharge (SGD), yet there are no direct observations of this phenomenon in the Arctic shelf seas. This study tests the hypothesis that SGD does exist in the Siberian Arctic Shelf seas, but its dynamics may be largely controlled by complicated geocryological conditions such as permafrost. The field-observational approach in the southeastern Laptev Sea used a combination of hydrological (temperature, salinity), geological (bottom sediment drilling, geoelectric surveys), and geochemical ( 224 Ra, 223 Ra, 228 Ra, and 226 Ra) techniques. Active SGD was documented in the vicinity of the Lena River delta with two different operational modes. In the first system, groundwater discharges through tectonogenic permafrost talik zones was registered in both winter and summer. The second SGD mechanism was cryogenic squeezing out of brine and watersoluble salts detected on the periphery of ice hummocks in the winter. The proposed mechanisms of groundwater transport and discharge in the Arctic land-shelf system is elaborated. Through salinity vs. 224 Ra and 224 Ra/ 223 Ra diagrams, the three main SGD-influenced water masses were identified and their end-member composition was constrained. Based on simple mass-balance box models, discharge rates at sites in the submarine permafrost talik zone were 1.7×10 6 m 3 d −1 or 19.9 m 3 s −1 , which is much higher than the April discharge of the Yana River. Further studies should apply these techniques on a broader scale with the objective of elucidating the relative importance of the SGD transport vector relative to surface freshwater discharge for both water balance and aquatic components such as dissolved organic carbon, carbon dioxide, methane, and nutrients.

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Main Structural Elements of Eastern Russian Arctic Continental Margin Derived from Satellite Gravity and Multichannel Seismic Reflection Data

Cited by 27 publications

References 13 publications

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

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

Indications for an Active Petroleum System in the Laptev Sea, Ne Siberia

Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: a case study in the Buor-Khaya Gulf, Laptev Sea

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