Details
| Original language | English |
|---|---|
| Title of host publication | Circum-Arctic Structural Events |
| Subtitle of host publication | Tectonic Evolution of the Arctic Margins and Trans-Arctic Links with Adjacent Orogens |
| Pages | 45-61 |
| Number of pages | 17 |
| ISBN (electronic) | 9780813795416 |
| Publication status | Published - 14 Jun 2019 |
Publication series
| Name | Special Paper of the Geological Society of America |
|---|---|
| Publisher | Geological Society of America |
| Volume | 541 |
| ISSN (Print) | 0072-1077 |
Abstract
The Laptev Sea Rift in the East Siberian continental margin plays an important role in the geodynamic models for the opening of the Eurasia Basin. The active Gakkel Ridge, which also represents the boundary between the North America and Eurasia plates, abruptly meets the continental margin of the Laptev Sea. On the continental shelf in the prolongation of the Gakkel Ridge, a rift developed since the Late Cretaceous/Early Cenozoic with the formation of five roughly north-south trending depocenters. To better understand the evolution of this rift, a basin modeling study was carried out with PetroMod® software. The modeled sections used in this study were developed on the basis of depth-converted reflection seismic sections. The sections cover the Anisin Basin in the north and the southeastern margin of the Ust´ Lena Rift in the south. The numerical simulations are supported by tectonic and sedimentological field data that were collected in outcrops during the CASE 13 expedition to the New Siberian Islands in 2011. For the Anisin Basin different scenarios were modeled with rift onsets between 110 Ma and 66 Ma. The results show that the present-day temperature field in the area of the Anisin Basin and at the southeastern margin of the Ust´ Lena Rift is characterized by horizontal, seafloor-parallel isotherms. Geohistory curves extracted from the 2D simulations indicate a twofold rift evolution with a stronger initial subsidence in the Late Cretaceous to Early Paleogene and a moderate subsidence in Late Paleogene and Neogene times. Based on the modeling results, an early rift onset around 110 Ma seems to be more realistic than a later one around 66 Ma.
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geology
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Circum-Arctic Structural Events: Tectonic Evolution of the Arctic Margins and Trans-Arctic Links with Adjacent Orogens . 2019. p. 45-61 (Special Paper of the Geological Society of America; Vol. 541).
Research output: Chapter in book/report/conference proceeding › Contribution to book/anthology › Research › peer review
}
TY - CHAP
T1 - Numerical basin modeling of the Laptev Sea Rift, NE Russia
AU - Brandes, Christian
AU - Franke, Dieter
AU - Piepjohn, Karsten
AU - Gaedicke, Christoph
N1 - Funding information: We would like to thank P. Sobolev and T. Tolmasheva (VSEGEI, St. Petersburg) for logistics and scientific support during the CASE 13 expedition. We are grateful to two anonymous reviewers, whose comments strongly improved the manuscript. Many thanks to S. Grassmann, H. Lorenz, R. Lutz, L. Reinhardt, D. Tanner, and J. Winsemann for discussion. The BMBF/German Federal Ministry of Education and Research (Internationales Büro des BMBF) is gratefully acknowledged for financial support to C. Brandes.
PY - 2019/6/14
Y1 - 2019/6/14
N2 - The Laptev Sea Rift in the East Siberian continental margin plays an important role in the geodynamic models for the opening of the Eurasia Basin. The active Gakkel Ridge, which also represents the boundary between the North America and Eurasia plates, abruptly meets the continental margin of the Laptev Sea. On the continental shelf in the prolongation of the Gakkel Ridge, a rift developed since the Late Cretaceous/Early Cenozoic with the formation of five roughly north-south trending depocenters. To better understand the evolution of this rift, a basin modeling study was carried out with PetroMod® software. The modeled sections used in this study were developed on the basis of depth-converted reflection seismic sections. The sections cover the Anisin Basin in the north and the southeastern margin of the Ust´ Lena Rift in the south. The numerical simulations are supported by tectonic and sedimentological field data that were collected in outcrops during the CASE 13 expedition to the New Siberian Islands in 2011. For the Anisin Basin different scenarios were modeled with rift onsets between 110 Ma and 66 Ma. The results show that the present-day temperature field in the area of the Anisin Basin and at the southeastern margin of the Ust´ Lena Rift is characterized by horizontal, seafloor-parallel isotherms. Geohistory curves extracted from the 2D simulations indicate a twofold rift evolution with a stronger initial subsidence in the Late Cretaceous to Early Paleogene and a moderate subsidence in Late Paleogene and Neogene times. Based on the modeling results, an early rift onset around 110 Ma seems to be more realistic than a later one around 66 Ma.
AB - The Laptev Sea Rift in the East Siberian continental margin plays an important role in the geodynamic models for the opening of the Eurasia Basin. The active Gakkel Ridge, which also represents the boundary between the North America and Eurasia plates, abruptly meets the continental margin of the Laptev Sea. On the continental shelf in the prolongation of the Gakkel Ridge, a rift developed since the Late Cretaceous/Early Cenozoic with the formation of five roughly north-south trending depocenters. To better understand the evolution of this rift, a basin modeling study was carried out with PetroMod® software. The modeled sections used in this study were developed on the basis of depth-converted reflection seismic sections. The sections cover the Anisin Basin in the north and the southeastern margin of the Ust´ Lena Rift in the south. The numerical simulations are supported by tectonic and sedimentological field data that were collected in outcrops during the CASE 13 expedition to the New Siberian Islands in 2011. For the Anisin Basin different scenarios were modeled with rift onsets between 110 Ma and 66 Ma. The results show that the present-day temperature field in the area of the Anisin Basin and at the southeastern margin of the Ust´ Lena Rift is characterized by horizontal, seafloor-parallel isotherms. Geohistory curves extracted from the 2D simulations indicate a twofold rift evolution with a stronger initial subsidence in the Late Cretaceous to Early Paleogene and a moderate subsidence in Late Paleogene and Neogene times. Based on the modeling results, an early rift onset around 110 Ma seems to be more realistic than a later one around 66 Ma.
UR - http://www.scopus.com/inward/record.url?scp=85090137426&partnerID=8YFLogxK
U2 - 10.1130/2018.2541(03)
DO - 10.1130/2018.2541(03)
M3 - Contribution to book/anthology
AN - SCOPUS:85090137426
T3 - Special Paper of the Geological Society of America
SP - 45
EP - 61
BT - Circum-Arctic Structural Events
ER -