Authors / CoAuthors
Roy, I.G.
Abstract
The depth to magnetic bottom (Curie point depth) is the deepest possible horizon in the crust up to which crustal magnetisation contribution remains significant to the measured magnetic field on the horizontal surface of the Earth. The primary cause of rock magnetisation is due to distribution of ferrimagnetic minerals within. The magnetisation property of such minerals depends on the temperature. At a critical temperature, known as Curie temperature the ferrimagnetic minerals become paramagnetic and contribute insignificantly in the measured magnetic field. Magnetite is a ferrimagnetic mineral which is most abundantly exists in the earth's crust. Curie temperature of magnetite is ~ 580o C. Since temperature increases with depth in general the depth to the magnetic bottom may be considered in a suitable geological condition as a proxy for Curie temperature. The name Curie point depth is then synonymous to the depth to the magnetic bottom
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nonGeographicDataset
eCat Id
70924
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
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2601
Australia
Keywords
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- Geophysical Mapaeromagnetic interp.
- ( Theme )
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- TMI
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- AU-SA
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Geophysics
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- Published_Internal
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2010-01-01T00:00:00
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geoscientificInformation
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