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The satellite magnetic anomaly of Ahaggar - Evidence for African Plate motionThe Ahaggar volcanic province of North Central Africa is considered a region of excess heat flow (hot spot) and hence elevated Curie isotherm. Using a modified version of the Parker FFT potential field representation, magnetic signals were calculated at Magsat altitudes for models in which the African Plate is both fixed and moving. The moving-plate model extends the Curie isotherm anomaly in the direction of plate motion and provides a satisfactory match to vertical component anomaly data when the magnitude of plate velocity is 0.75 cm/yr. Although the signal levels are marginal for the scalar component anomalies of this region, the same model provides an adequate match to this data set and is clearly preferable to a fixed-plate model.
Document ID
19860028008
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Phillips, R. J.
(Southern Methodist Univ. Dallas, TX, United States)
Brown, C. R.
(Southern Methodist University Dallas, TX, United States)
Date Acquired
August 12, 2013
Publication Date
October 1, 1985
Publication Information
Publication: Geophysical Research Letters
Volume: 12
ISSN: 0094-8276
Subject Category
Geophysics
Accession Number
86A12746
Funding Number(s)
CONTRACT_GRANT: NAG5-298
Distribution Limits
Public
Copyright
Other

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