Magnetic basement study in the Barents Sea from inversion and forward modelling

被引：19
|
作者：
Marello, Laura [1 ,2 ]
Ebbing, Joerg [1 ,2 ]
Gernigon, Laurent [1 ]
机构：
[1] Geol Survey Norway NGU, N-7491 Trondheim, Norway
[2] Norwegian Univ Sci & Technol NTNU, Dept Petr Engn & Appl Geophys, N-7491 Trondheim, Norway
来源：
TECTONOPHYSICS | 2010年 / 493卷 / 1-2期
关键词：
Magnetic field; Basement setting; Inversion modelling; Forward modelling; Barents Sea; Caledonian; Timanian and Uralian Orogeny; IGNEOUS PROVINCE; NORTHERN NORWAY; ZIRCON AGES; EVOLUTION; SVALBARD; GRAVITY; RUSSIA; REGION; MARGIN; PLATE;
D O I：
10.1016/j.tecto.2010.07.014
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
We have investigated the basement in the Barents Sea region and its relationship to the magnetic anomalies observed. Besides magnetic field image analysis (incl. pseudo-gravity), we performed both 3D inversion and 2D forward modelling to characterise the geometry of the top-basement and the distribution of magnetisation and density. For the 3D inversion, the influence of the input parameters has been studied in detail, and large uncertainties have been encountered over some areas. On a regional scale, the petrophysical parameters and not the geometry of the top-basement dominate the magnetic anomalies. The 2D models assist in linking together the main crustal units of the Barents Sea, which are expressed by different magnetic basement characteristics. Based on our inversion and modelling work we have compiled a map which shows the different basement domains and their structural trends. The map allows us to interpret the possible extension of Timanian, Caledonian and Uralian magnetic terranes in the area. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：153 / 171
页数：19
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