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Geodynamo history preserved in single silicate crystals; origins and long-term mantle control

John A. Tarduno
Geodynamo history preserved in single silicate crystals; origins and long-term mantle control
Elements (August 2009) 5 (4): 217-222

Abstract

The long-term history of the geodynamo provides insight into how Earth's innermost and outermost parts formed. The magnetic field is generated in the liquid-iron core as a result of convection driven by heat carried across the core-mantle boundary and freezing of the solid inner core. Earth's magnetic field acts as a shield against energetic solar radiation, and therefore the geodynamo played an important role in the development and retention of our atmosphere, ultimately setting the stage for the evolution of life. A new analytical approach, using single silicate crystals that host minute magnetic particles, can reveal heretofore hidden aspects of Earth's magnetic history. This method is being used to address some of the outstanding questions regarding the long-term behavior of the geodynamo.


ISSN: 1811-5209
Serial Title: Elements
Serial Volume: 5
Serial Issue: 4
Title: Geodynamo history preserved in single silicate crystals; origins and long-term mantle control
Author(s): Tarduno, John A.
Affiliation: University of Rochester, Department of Earth and Environmental Sciences, Rochester, NY, United States
Pages: 217-222
Published: 200908
Text Language: English
Publisher: Mineralogical Society of America and Mineralogical Society of Great Britain and Ireland and Mineralogical Association of Canada and Geochemical Society and Clay Minerals Society, International
References: 33
Accession Number: 2009-083384
Categories: Solid-earth geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N34°00'00" - N52°00'00", E167°00'00" - E173°00'00"
Country of Publication: International
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 200945
Program Name: ODPOcean Drilling Program
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