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Carbon Dating Uranium-lead dating
Type
of
decay:
Alpha decay
Alpha and Beta decay
Uses:
Uranium is better for testing minerals. E.g Rocks
Carbon dating is best for testing organic samples. E.g Cloths, bones and
wood.
Carbon Dating
Uranium-lead dating allowed scientists to determine the age of the Blanche Cave in South Australia to be over 500 000 years. By observing the amount of uranium in the soda straw stalactites and compared to the Concordia diagram
Blanche Cave in South Australia
The Concordia Diagram is used when determining the ratio of uranium and lead in a sample.
Bryan Brandenburg Official | Uranium-lead Dating. 2014. Bryan Brandenburg Official | Uranium-lead Dating. [ONLINE] Available at: http://bryanmbrandenburg.com/uranium-lead-dating/. [Accessed 3 October 2014].
The experiment was carried through by measuring the amount of uranium in the soda straw stalactites.
The series of decay from uranium 238 to lead 206(stable element)
Bryan Brandenburg Official | Uranium-lead Dating. 2014. Bryan Brandenburg Official | Uranium-lead Dating. [ONLINE] Available at: http://bryanmbrandenburg.com/uranium-lead-dating/. [Accessed 2 October 2014].
Isoptopes often have unstable nuclei and undergoes decay to stable element. Uranium 235 and 238 are isotopes of Uranium and in general uranium 238 will decay to lead 206 and uranium 235 will decay to lead 207 via alpha and beta decays.
LifeSciCottrell, (2014), Radioactive Dating [ONLINE]. Available at: https://lifescitpjhs.wikispaces.com/Radioactive+Dating [Accessed 01 October 14].
By using the uranium-lead dating, scientists were able to identified the painting is approximately 24000 to 29300 years old and this has supported the presence of ancestors of East Timor theory.
LifeSciCottrell, (2014), Radioactive Dating [ONLINE]. Available at: https://lifescitpjhs.wikispaces.com/Radioactive+Dating [Accessed 01 October 14].
Rock art in East Timor,Lene Hara cave:
Scientists were able to use uranium-lead dating to measure the age of the painting.