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Deep structure and sub-basalt exploration of the mid-Norwegian margin with emphasis on the Moere margin

Thesis/Dissertation:

Abstract

This thesis addresses the use of potential field data in two main topics: sub-basalt exploration and structure of the deeper crust. Synthetic models and forward models of the Moere margin were constructed to test the sensitivity of the various potential field methods. The synthetic models demonstrate that forward modelling of the gravity and magnetic data is a valuable tool in basement recognition in sub-basaltic settings and the use of gravity gradients further limits the modelling ambiguity and improves the basement mapping. Deep sills, as observed in the Moere Basin, cannot be identified from the gravity and magnetic data alone but the lava flows have a clear effect on the gravity and magnetic signature if thicker than approx1 km. Experiments with Euler Deconvolution reveal the limitations of the method in sub-basaltic settings. A 3D regional gravity and magnetic model of the Moere margin integrated with seismic and well data gives a novel view on the architecture of the continental crust, the distribution of high density lower crust, and the Moho topography. The isostatic response of the water and sediment loading reflected by the Moho provides further insight in the evolution of the margin. The results from the Moere margin model merged  More>>
Publication Date:
Oct 15, 2010
Product Type:
Thesis/Dissertation
Resource Relation:
Other Information: Doctoral theses at NTNU; ISSN 1503-8181; 2010:154; Thesis or Dissertation; TH: Thesis (Ph.D); refs., figs., tabs
Subject:
02 PETROLEUM; 03 NATURAL GAS; GRAVITY LOGGING; MAGNETIC SURVEYS; CONTINENTAL SHELF; NORWAY; EXPLORATION; GEOLOGIC SURVEYS; PETROLEUM GEOLOGY
OSTI ID:
1007302
Research Organizations:
Norges teknisk-naturvitenskapelige universitet, Trondheim (Norway)
Country of Origin:
Norway
Language:
English
Other Identifying Numbers:
Other: ISBN 978-82-471-2278-5; TRN: NO1105042
Availability:
Available at: http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-11136
Submitting Site:
NW
Size:
150 p. pages
Announcement Date:
Mar 07, 2011

Thesis/Dissertation:

Citation Formats

Reynisson, Reynir Fjalar. Deep structure and sub-basalt exploration of the mid-Norwegian margin with emphasis on the Moere margin. Norway: N. p., 2010. Web.
Reynisson, Reynir Fjalar. Deep structure and sub-basalt exploration of the mid-Norwegian margin with emphasis on the Moere margin. Norway.
Reynisson, Reynir Fjalar. 2010. "Deep structure and sub-basalt exploration of the mid-Norwegian margin with emphasis on the Moere margin." Norway.
@misc{etde_1007302,
title = {Deep structure and sub-basalt exploration of the mid-Norwegian margin with emphasis on the Moere margin}
author = {Reynisson, Reynir Fjalar}
abstractNote = {This thesis addresses the use of potential field data in two main topics: sub-basalt exploration and structure of the deeper crust. Synthetic models and forward models of the Moere margin were constructed to test the sensitivity of the various potential field methods. The synthetic models demonstrate that forward modelling of the gravity and magnetic data is a valuable tool in basement recognition in sub-basaltic settings and the use of gravity gradients further limits the modelling ambiguity and improves the basement mapping. Deep sills, as observed in the Moere Basin, cannot be identified from the gravity and magnetic data alone but the lava flows have a clear effect on the gravity and magnetic signature if thicker than approx1 km. Experiments with Euler Deconvolution reveal the limitations of the method in sub-basaltic settings. A 3D regional gravity and magnetic model of the Moere margin integrated with seismic and well data gives a novel view on the architecture of the continental crust, the distribution of high density lower crust, and the Moho topography. The isostatic response of the water and sediment loading reflected by the Moho provides further insight in the evolution of the margin. The results from the Moere margin model merged with results from a 3D model of the Voering and Lofoten margins give a regional view on the deep structures on the mid-Norwegian margin. Combination of the modelling results and isostatic considerations provide means to address the origin of the lower crustal body on the margin and the evolution of the whole mid-Norwegian margin. (Author)}
place = {Norway}
year = {2010}
month = {Oct}
}