Penanggalan timbal–timbal
Penanggalan timbal–timbal adalah metode penanggalan untuk memperkirakan umur batuan atau sampel geologis lain. Tiga dari isotop stabil timbal (Pb), yaitu timbal-206, timbal-207 dan timbal-208 adalah produk akhir dari deret radioaktif yang umum ditemui di alam. Seiring perjalanan waktu, perbandingan timbal-206 dan timbal-207 terhadap timbal-204 akan meningkat karena timbal-206 dan timbal-207 akan bertambah diakibatkan peluruhan unsur lain, sedangkan timbal-204 bukanlah produk akhir peluruhan. Penanggalan timbal–timbal memanfaatkan fenomena ini untuk memperkirakan umur sampel.[1]
Lihat pula
Referensi
- ^ Levin 2009, hlm. 40–41.
Daftar pustaka
- Levin, H. L. (2009). The Earth Through Time. John Wiley & Sons. ISBN 978-0-470-38774-0.
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