Encyclopedia of Scientific Dating Methods

Living Edition
| Editors: W. Jack Rink, Jeroen Thompson

Uranium–Lead, Extraterrestrial, Early Solar System

Living reference work entry
DOI: https://doi.org/10.1007/978-94-007-6326-5_204-1

Synonyms

Definition

The science of relating events that transformed a cloud of interstellar gas to our solar system to time, by means of using decay of uranium isotopes 238U and 235U to lead isotopes 206Pb and 207Pb.

Introduction

Stars and their planetary systems form by gravitational collapse of dense parts in large interstellar molecular clouds. It is thought that, about 4.57 billion years ago, our solar system formed by a similar process. The early history of our solar system cannot be observed directly, but it is recorded in the very early minerals and rocks that were removed from the ongoing process of accretion before formation of the planets, and thus escaped geological reworking. These primitive rocks are preserved in several non-planetary environments – in asteroids that experienced only moderate heating, in comets – and as interplanetary dust particles floating in space. The asteroids that were extensively melted are thought to be the sources of...

Keywords

Solar System Thermal Ionization Mass Spectrometry Parent Body Protoplanetary Disk Ordinary Chondrite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Research School of Earth SciencesThe Australian National UniversityCanberraAustralia