Abstract
This work uses a geophysical forward-modeling approach to model magnetic anomalies from the upper mantle. Over the years, the potency of the upper mantle in contributing to long-wavelength magnetic anomalies has been a major topic of debate among geoscientists. However, recent works show that some low geotherms such as subduction zones and cratons contain rocks (mantle xenoliths) which are below the Curie-Temperature of magnetite -the most common ferromagnetic mineral found in xenoliths- and could potentially contribute to long-wavelength magnetic anomalies. This holds the prospect of disproving the view that anything below the MOHO is non-magnetic, finding better ways of locating natural resources -which are temperature-dependent, and the resolution of the mismatch between observed long-wavelength anomalies and surface field upward continued to satellite altitude. Xenoliths have been collected and magnetically investigated across tectonic regions of subduction zones (Kamchaka island arcs), cratons (Siberian craton), hotspots (Hawaii hotspots) and mantle plumes (Massif-central plumes). This research will be aimed at producing forward-models of magnetic anomalies from the upper mantle across tectonic regions and geotherms (cold and hot regions) where Xenoliths were collected. The launch of SWARM satellite provides an opportunity to restudy lithospheric magnetization and will provide data to test the findings of this research. Therefore, this research will serve as a great step to the interpretation of SWARM results.
Original language | English |
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Pages (from-to) | 2041-2045 |
Number of pages | 5 |
Journal | SEG Technical Program Expanded Abstracts |
Volume | 35 |
DOIs | |
State | Published - 2016 |
Externally published | Yes |
Event | SEG International Exposition and 86th Annual Meeting, SEG 2016 - Dallas, United States Duration: Oct 16 2011 → Oct 21 2011 |
Scopus Subject Areas
- Geotechnical Engineering and Engineering Geology
- Geophysics