Intensity of the Earth's magnetic field since Precambrian from Thellier-type paleointensity data and interferences on the thermal history of the core.

Details Intensity of the Earth's magnetic field since Precambrian from Thellier-type paleointensity data and interferences on the thermal history of the core. Intensity of the Earth's magnetic field since Precambrian from Thellier-type paleointensity data and interferences on the thermal history of the core.

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992geoji.108..613p&link_type=abstract

Geophysical Journal International, Vol. 108, No. 2, p. 613 - 620

Physics

23

Scientific paper

The authors present a compilation of palaeointensity data obtained by the Thellier method from magnetic rocks up to 3.5 Gyr old. No apparent very long-term variation occurs from present to Early Precambrian. The overall data are compatible with a gravitationally powered dynamo model in which the inner core is some 4.0 Gyr old. However, palaeointensity data are still too incomplete to dismiss the possibility of a more complex field history with a geodynamo first thermally driven then gravitationally powered. Despite the limited number of data currently available, large differences in the dipole field moment are clearly documented with a time-scale of the order of 50-100 Myr. The changes in intensity can be due to repetitive instabilities of the thermal boundary layer at the base of the mantle.

Affiliated with

Also associated with

No associations

Rating

Intensity of the Earth's magnetic field since Precambrian from Thellier-type paleointensity data and interferences on the thermal history of the core. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Intensity of the Earth's magnetic field since Precambrian from Thellier-type paleointensity data and interferences on the thermal history of the core., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intensity of the Earth's magnetic field since Precambrian from Thellier-type paleointensity data and interferences on the thermal history of the core. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1047531