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js-section-title js-c-reading-companion-sections-item">Definition</h2> <div class="c-article-section__content" id="Sec1-content"> <p><b>Uranium</b>–<b>Lead dating</b> is the geological age-determination method that uses the radioactive decay of uranium (U) isotopes (<sup>238</sup>U, <sup>235</sup>U, and also in this entry <sup>232</sup>Th) into stable isotopes of lead (Pb) (<sup>206</sup>Pb, <sup>207</sup>Pb, and <sup>208</sup>Pb, respectively). U–Pb geochronology is the science of both the methodology but also the application of these methods to geological problems.</p> </div> </div> </section> <section data-title="U–Pb Decay System and Age Calculations"> <div class="c-article-section" id="Sec2-section"> <h2 id="Sec2" class="c-article-section__title js-section-title js-c-reading-companion-sections-item">U–Pb Decay System and Age Calculations</h2> <div class="c-article-section__content" id="Sec2-content"> <p>The accumulation of Pb in U-bearing minerals according to known decay rates of radioactive parent isotopes of U and Th forms the basis of this dating method. One measures the amount of <i>radiogenic</i> (i.e., produced from radioactive decay) Pb relative to the amount of radioactive parent isotope. As there are three radioactive isotopes (<sup>238</sup>U, <sup>235</sup>U, and <sup>232</sup>Th) that decay into stable “daughter” isotopes of Pb, one can calculate three ages in this manner, two of which have the same (i.e., U and Pb) elements forming parent and daughter. The decay systems, decay constants (λ), and half-lives...</p> </div> </div> </section> </body> <div class="c-notes"> <p class="c-notes__text c-status-message--info"> <svg width="24" height="24" focusable="false" role="img" aria-hidden="true" class="c-status-message__icon"> <use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#icon-eds-i-info-filled-medium"></use> </svg> This is a preview of subscription content, <a id="test-login-banner-link" href="//wayf.springernature.com?redirect_uri=https%3A%2F%2Flink.springer.com%2Freferenceworkentry%2F10.1007%2F978-94-007-6326-5_193-1%3Ferror%3Dcookies_not_supported%26code%3Df987cb3b-367d-4821-840b-aabf8bd05c73" data-track="click" data-track-action="login" data-track-label="link">log in via an institution</a> <svg width="16" height="16" focusable="false" role="img" aria-hidden="true" class="u-icon c-external-link__icon"> <use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#icon-eds-i-external-link-small"></use> </svg> to check access. </p> </div> <div data-test="access-chapter-mobile" class="app-article-access"> <h2 class="app-article-access__heading">Access this chapter</h2> <div class="u-ma-16 u-clear-both"> <a href="//wayf.springernature.com?redirect_uri=https%3A%2F%2Flink.springer.com%2Freferenceworkentry%2F10.1007%2F978-94-007-6326-5_193-1%3Ferror%3Dcookies_not_supported%26code%3Df987cb3b-367d-4821-840b-aabf8bd05c73" class="u-button u-button--full-width u-button--primary u-justify-content-space-between c-pdf-download__link" data-track="click" data-track-action="institution access" data-track-label="button"> <span data-test="access-via-institution">Log in via an institution</span> <svg aria-hidden="true" focusable="false" width="16" height="16" class="u-icon"> <use xlink:href="#icon-eds-i-arrow-right-medium"></use> </svg> </a> </div> <div data-test="buy-box-mobile" class="u-mb-24"> </div> <div class="app-article-access__subscriptions"> <p><a href="https://www.springernature.com/gp/librarians/licensing/agc/ebooks">Institutional subscriptions <svg aria-hidden="true" focusable="false" width="24" height="24" class="u-icon"> <use xlink:href="#icon-eds-i-arrow-right-medium"></use> </svg> </a></p> </div> </div> <div data-test="cobranding-download"> </div> <div id="MagazineFulltextChapterBodySuffix"><section aria-labelledby="Bib1" data-title="Bibliography"><div class="c-article-section" id="Bib1-section"><h2 id="Bib1" class="c-article-section__title js-section-title js-c-reading-companion-sections-item">Bibliography</h2><div class="c-article-section__content" id="Bib1-content"><div data-container-section="references"><ul class="c-article-references" data-track-component="outbound reference" data-track-context="references section"><li class="c-article-references__item js-c-reading-companion-references-item"><p class="c-article-references__text" id="ref-CR1">Amelin, Y., and Ireland, T. 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Jack Rink </p></li><li id="Aff2"><p class="c-article-author-affiliation__address">Department of Medical Physics and Applied Radiation Sciences, McMaster University, Hamilton, Ontario, Canada</p><p class="c-article-author-affiliation__authors-list">Jeroen Thompson </p></li></ol></div></div></section><section data-title="Rights and permissions" lang="en"><div class="c-article-section" id="rightslink-section"><h2 id="rightslink" class="c-article-section__title js-section-title js-c-reading-companion-sections-item">Rights and permissions</h2><div class="c-article-section__content" id="rightslink-content"><p class="c-article-rights" data-test="rightslink-content"><a data-track="click" data-track-action="view rights and permissions" data-track-label="link" href="https://s100.copyright.com/AppDispatchServlet?publisherName=SpringerNature&orderBeanReset=true&orderSource=SpringerLink&title=Uranium%E2%80%93Lead%20Dating&author=Dr.%20Randall%20Parrish&contentID=10.1007%2F978-94-007-6326-5_193-1&copyright=Springer%20Science%2BBusiness%20Media%20Dordrecht&publication=eBook&publicationDate=2014&startPage=1&endPage=16&imprint=Springer%20Science%2BBusiness%20Media%20Dordrecht">Reprints and permissions</a></p></div></div></section><section data-title="Copyright information"><div class="c-article-section" id="copyright-information-section"><h2 id="copyright-information" class="c-article-section__title js-section-title js-c-reading-companion-sections-item">Copyright information</h2><div class="c-article-section__content" id="copyright-information-content"><p>© 2014 Springer Science+Business Media Dordrecht</p></div></div></section><section aria-labelledby="chapter-info" data-title="About this entry" lang="en"><div class="c-article-section" id="chapter-info-section"><h2 id="chapter-info" class="c-article-section__title js-section-title js-c-reading-companion-sections-item">About this entry</h2><div class="c-article-section__content" id="chapter-info-content"><div class="c-bibliographic-information"><div class="c-bibliographic-information__column"><h3 class="c-article__sub-heading" id="citeas">Cite this entry</h3><p class="c-bibliographic-information__citation" data-test="bibliographic-information__cite_this_chapter">Parrish, R. (2014). Uranium–Lead Dating. In: Rink, W., Thompson, J. (eds) Encyclopedia of Scientific Dating Methods. 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