scholarly journals Deep structure of the Lofoten-Vesterålen segment of the Mid-Norwegian continental margin and adjacent areas derived from 3-D density modeling

2017 ◽  
Vol 122 (2) ◽  
pp. 1402-1433 ◽  
Author(s):  
Y. P. Maystrenko ◽  
O. Olesen ◽  
L. Gernigon ◽  
S. Gradmann
Keyword(s):  
Continental Margin ◽  
Deep Structure ◽  
Density Modeling

scholarly journals Deep structure of the Namibia continental margin as derived from integrated geophysical studies

2000 ◽  
Vol 105 (B11) ◽  
pp. 25829-25853 ◽  
Author(s):  
Klaus Bauer ◽  
Sönke Neben ◽  
Bernd Schreckenberger ◽  
Rolf Emmermann ◽  
Karl Hinz ◽  
...  
Keyword(s):  
Continental Margin ◽  
Deep Structure

Gravity and Deep Structure of the Continental Margin of Banks Island and Mackenzie Delta

1975 ◽  
Vol 12 (3) ◽  
pp. 378-394 ◽  
Author(s):  
L. W. Sobczak
Keyword(s):  
Continental Margin ◽  
Coastal Plain ◽  
Deep Structure ◽  
Gravity Anomalies ◽  
Sedimentary Basins ◽  
Drill Hole ◽  
The Arctic ◽  
Mackenzie Delta ◽  
Arctic Coastal Plain ◽  
Free Air Gravity

Regional and deep structure supported by drill hole, gravity, and seismic evidence is interpreted along five profiles—one across the Mackenzie Delta and four across the continental margin. Isostatic compensation has reduced the gravity effect of most structures but gravity anomalies are still sufficient to outline two major sedimentary basins—one very extensive and thick (>10 km) underlying the continental margin and Mackenzie Delta and the other narrow and shallow east and southeast of the Arctic Coastal Plain. A basement ridge separating these basins along the eastern side of the Arctic Coastal Plain is outlined by a trend of relative gravity highs.An arcuate belt of prominent elliptically-shaped free air gravity highs (peak values >100 mgal) over the continental break outlines an uncompensated region of mass excesses. These mass excesses are explained by pro-grading wedges (>2 km thick) of Quaternary and possibly Tertiary sediments that have displaced seawater and act as a load on the crust rather than by the alternative concepts of an uncompensated ridge or high density material in the basement.

The deep structure of the east Oman continental margin: preliminary results and interpretation

1990 ◽  
Vol 173 (1-4) ◽  
pp. 319-331 ◽  
Author(s):  
P.J. Barton ◽  
T.R.E. Owen ◽  
R.S. White
Keyword(s):  
Continental Margin ◽  
Deep Structure ◽  
Preliminary Results

Deep structure of the crust beneath the Sea of Okhotsk inferred from 3D seismic density modeling

Oceanology ◽  
2012 ◽  
Vol 52 (3) ◽  
pp. 411-421 ◽  
Author(s):  
A. L. Piskarev ◽  
V. V. Butsenko ◽  
V. A. Poselov ◽  
V. A. Savin
Keyword(s):  
Sea Of Okhotsk ◽  
Deep Structure ◽  
3D Seismic ◽  
The Sea Of Okhotsk ◽  
Density Modeling

Opening of the north-eastern Atlantic and onshore mountain rise controlled by Fennoscandian deep structure

2021 ◽  
Author(s):  
Anna Makushkina ◽  
Benoit Tauzin ◽  
Meghan Miller ◽  
Hrvoje Tkalcic ◽  
Hans Thybo
Keyword(s):  
Continental Margin ◽  
Large Scale ◽  
Deep Structure ◽  
Tectonic Setting ◽  
Structural Heterogeneity ◽  
Receiver Functions ◽  
Mountain Range ◽  
North East ◽  
The North ◽  
Active Tectonic

<p>Large-scale topography is thought to be mainly controlled by active tectonic processes. Fennoscandia is located far from any active tectonic setting and yet includes a mountain range along its passive North Atlantic margin. Models proposed to explain the origin of these enigmatic mountains are based on glacial isostatic adjustments, delamination, long-term isostatic equilibration, and dynamic support from the mantle, yet no consensus has been reached. We show that topography along the continental margin of Fennoscandia may be influenced by its deep structure. Fennoscandia formed by amalgamation of Proterozoic and Archean continental blocks; using both S- and P-receiver functions, we discovered that the Fennoscandian lithosphere still retains the original structural heterogeneity and its western margin is composed of three distinct blocks. The southern and northern blocks have relatively thin crust (~40-45 km), while the central block has thick crust (~60 km) that most likely was formed by crustal stacking during the Proterozoic amalgamation. The boundaries of the blocks continue into the oceanic crust as two major structural zones of the North-East Atlantic, suggesting that the Fennoscandian amalgamation structures determined the geometry of the ocean opening.  We found no evidence for mountain root support or delamination in the areas of high topography that could be related with mountain formation. Instead, our results suggest that both crustal and lithospheric heterogeneity of Fennoscandia along the continental margin might have a control on geodynamic forces that support the rise of Scandinavian mountains. </p>

scholarly journals Deep structure of the West African continental margin (Congo, Zaïre, Angola), between 5°S and 8°S, from reflection/refraction seismics and gravity data

2004 ◽  
Vol 158 (2) ◽  
pp. 529-553 ◽  
Author(s):  
Isabelle Contrucci ◽  
Luis Matias ◽  
Maryline Moulin ◽  
Louis Géli ◽  
Frauke Klingelhofer ◽  
...  
Keyword(s):  
Continental Margin ◽  
Deep Structure ◽  
Gravity Data ◽  
West African ◽  
The West ◽  
Refraction Seismics

scholarly journals The Hatton Bank continental margin-II. Deep structure from two-ship expanding spread seismic profiles

1989 ◽  
Vol 96 (2) ◽  
pp. 295-309 ◽  
Author(s):  
S. R. Fowler ◽  
R. S. White ◽  
G. D. Spence ◽  
G. K. Westbrook
Keyword(s):  
Continental Margin ◽  
Deep Structure ◽  
Seismic Profiles

scholarly journals Deep structure of the Mid-Norwegian continental margin (the Vøring and Møre basins) according to 3-D density and magnetic modelling

2017 ◽  
Vol 212 (3) ◽  
pp. 1696-1721 ◽  
Author(s):  
Yuriy Petrovich Maystrenko ◽  
Laurent Gernigon ◽  
Aziz Nasuti ◽  
Odleiv Olesen
Keyword(s):  
Continental Margin ◽  
Deep Structure ◽  
Magnetic Modelling

scholarly journals DEEP STRUCTURE OF OSBORN PLATO (INDIAN OCEAN) ACCORDING TO MAGNETIC AND GRAVITY MODELING

2020 ◽  
Vol 48 (2) ◽  
pp. 69-90
Author(s):  
A. M. Gorodnitskiy ◽  
A. N. Ivanenko ◽  
O. V. Levchenko ◽  
I. A. Veklich ◽  
N. A. Shishkina
Keyword(s):  
Deep Structure ◽  
Classical Model ◽  
Bouguer Anomaly ◽  
Magnetic Layer ◽  
Magnetic Anomalies ◽  
Oceanic Lithosphere ◽  
Gravity Modeling ◽  
Multi Stage ◽  
Southern Central ◽  
Density Modeling

According to the data of hydro-magnetic surveying and satellite altimetry, using the original technology for solving the inverse problem, 2D models of the magnetic layer for three latitudinal profiles crossing the submarine plateau of Osborne in the southern, central and northern parts were constructed. Density modeling for these three profiles was carried out using the available worldwide data on free air anomalies, reduced to the Bouguer anomaly. On all profiles, zones of increased effective magnetization with complex morphology are confidently distinguished. The distinguished sources of magnetic anomalies are tending toward two deep horizons. The upper one corresponds to layer 2 of the classical model of the magnetic layer of the oceanic lithosphere and is a source of local magnetic anomalies of both signs. The lower magnetic layer, the bottommost part of which approximately corresponds to the depth of the Moho surface according to density modeling, is apparently composed of serpentinites. The crust is broken by a system of sub-meridional faults, to which confined deep magnetic bodies, possibly associated with serpentinite protrusions. The revealed laterally inhomogeneous deep structure of the magnetic layer of the Osborne plateau and the adjacent NER segment testifies to their complex multi-stage volcano-tectonic evolution, which continues to present day.

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