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Early Thermal Evolution of Planetesimals and its Impact on Processing and Dating of Meteoritic Material

Gail, H.-P. and Trieloff, M. and Breuer, D. and Spohn, Tilman (2014) Early Thermal Evolution of Planetesimals and its Impact on Processing and Dating of Meteoritic Material. In: Protostars and Planets VI Space Science Series. University of Arizona Press. pp. 571-593. ISBN 0816531242.

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Radioisotopic ages for meteorites and their components provide constraints on the evolution of small bodies: timescales of accretion, thermal and aqueous metamorphism, differentiation, cooling and impact metamorphism. Realising that the decay heat of short-lived nuclides (e.g. 26Al, 60Fe), was the main heat source driving differentiation and metamorphism, thermal modeling of small bodies is of utmost importance to set individual meteorite age data into the general context of the thermal evolution of their parent bodies, and to derive general conclusions about the nature of planetary building blocks in the early solar system. As a general result, modelling easily explains that iron meteorites are older than chondrites, as early formed planetesimals experienced a higher concentration of short-lived nuclides and more severe heating. However, core formation processes may also extend to 10 Ma after formation of Calcium-Aluminum-rich inclusions (CAIs). A general effect of the porous nature of the starting material is that relatively small bodies (< few km) will also differentiate if they form within 2 Ma after CAIs. A particular interesting feature to be explored is the possibility that some chondrites may derive from the outer undifferentiated layers of asteroids that are differentiated in their interiors. This could explain the presence of remnant magnetization in some chondrites due to a planetary magnetic field.

Item URL in elib:https://elib.dlr.de/90178/
Document Type:Book Section
Title:Early Thermal Evolution of Planetesimals and its Impact on Processing and Dating of Meteoritic Material
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gail, H.-P.Heidelberg University, GermanyUNSPECIFIED
Trieloff, M.University of Colorado, Boulder, USAUNSPECIFIED
Breuer, D.doris.breuer (at) dlr.deUNSPECIFIED
Spohn, TilmanTilman.Spohn (at) dlr.deUNSPECIFIED
Journal or Publication Title:Protostars and Planets VI
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 571-593
EditorsEmailEditor's ORCID iD
Publisher:University of Arizona Press
Series Name:Space Science Series
Keywords:age dating, meteorites, thermal evolution, planetesimals
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Exploration of the Solar System
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Physics
Institute of Planetary Research > Leitungsbereich PF
Institute of Planetary Research
Deposited By: Rückriemen, Tina
Deposited On:23 Mar 2015 14:33
Last Modified:01 Dec 2018 19:50

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