GEOL 1020 Lecture Notes - Lecture 8: Deep Time, Uranium-238, Igneous Rock
9 Sep 2016
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You have a mineral that was crystalized in an igneous rock. It has no daughter atoms when it first forms, so it only has parent atoms. Once it is crystalized, the mineral becomes closed and the products of radioactive decay begin to accumulate. Over time, more and more daughter products accumulate. o. Ratio of daughter to parent (d/n) increase with time! To calculate d/n after any subsequent number of t1/2,siply double the previous value and add one. Examples of elements and their half-life: uranium. depleted = 238u decays to 206pb o o o. The isotopes that undergoes decay is the parent (n) , the isotopes that is the product is the daughter (d) Loss of a beta particle (e^- from a neutron) Capture of a beta particle (e^- into proton) There are many steps to decays protons. White light is really all the colors of the rainbow. This is the instrument that is used to measure d/n.
