Magnetism on the angrite parent body and the early differentiation of planetesimals

Benjamin P. Weiss; James S. Berdahl; Linda Elkins-Tanton; Sabine Stanley; Eduardo A. Lima; Laurent Carporzen

doi:10.1126/science.1162459

Magnetism on the angrite parent body and the early differentiation of planetesimals

Benjamin P. Weiss, James S. Berdahl, Linda Elkins-Tanton, Sabine Stanley, Eduardo A. Lima, Laurent Carporzen

Research output: Contribution to journal › Article › peer-review

103 Scopus citations

Abstract

Angrites are among the oldest known pristine basaltic meteorites and record the earliest stages of planet formation and differentiation. Our paleomagnetic analysis of three angrites found that they record a past magnetic field of ∼10 microteslas on the angrite parent body extending from 4564 to at least 4558 million years ago. Because the angrite paleomagnetic record extends beyond the expected lifetime of the early circumstellar disk, these paleofields were probably generated internally on the angrite parent body, possibly by an early dynamo in a rapidly formed metallic core.

Original language	English (US)
Pages (from-to)	713-716
Number of pages	4
Journal	Science
Volume	322
Issue number	5902
DOIs	https://doi.org/10.1126/science.1162459
State	Published - Oct 31 2008
Externally published	Yes

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abstract = "Angrites are among the oldest known pristine basaltic meteorites and record the earliest stages of planet formation and differentiation. Our paleomagnetic analysis of three angrites found that they record a past magnetic field of ∼10 microteslas on the angrite parent body extending from 4564 to at least 4558 million years ago. Because the angrite paleomagnetic record extends beyond the expected lifetime of the early circumstellar disk, these paleofields were probably generated internally on the angrite parent body, possibly by an early dynamo in a rapidly formed metallic core.",

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AU - Weiss, Benjamin P.

AU - Berdahl, James S.

AU - Elkins-Tanton, Linda

AU - Stanley, Sabine

AU - Lima, Eduardo A.

AU - Carporzen, Laurent

PY - 2008/10/31

Y1 - 2008/10/31

N2 - Angrites are among the oldest known pristine basaltic meteorites and record the earliest stages of planet formation and differentiation. Our paleomagnetic analysis of three angrites found that they record a past magnetic field of ∼10 microteslas on the angrite parent body extending from 4564 to at least 4558 million years ago. Because the angrite paleomagnetic record extends beyond the expected lifetime of the early circumstellar disk, these paleofields were probably generated internally on the angrite parent body, possibly by an early dynamo in a rapidly formed metallic core.

AB - Angrites are among the oldest known pristine basaltic meteorites and record the earliest stages of planet formation and differentiation. Our paleomagnetic analysis of three angrites found that they record a past magnetic field of ∼10 microteslas on the angrite parent body extending from 4564 to at least 4558 million years ago. Because the angrite paleomagnetic record extends beyond the expected lifetime of the early circumstellar disk, these paleofields were probably generated internally on the angrite parent body, possibly by an early dynamo in a rapidly formed metallic core.

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ER -

Magnetism on the angrite parent body and the early differentiation of planetesimals

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