Natural Sciences >> GeologyRadiometric Dating of Igneous Rocksby Robert McDaniel
Submitted : Spring 2014 Potassium is one of Earth’s most abundant minerals which constitutes about 2.1% of its crust. It is commonly found in igneous rocks and the isotope ^{40}K can be used to date the rocks from the time that they solidified. The goal of this project was to examine the use of radiometric dating, particularly PotassiumArgon dating, in the field of geology and to calculate the age of a sample of igneous rock (Potassium Feldspar) given the amount of ^{40}K and ^{40}Ar isotopes found within the sample. Using the ratio of ^{40}K and ^{40}Ar found within the sample, a relatively simple exponential formula was implemented to date the absolute age of the rock. The sample of Kspar was found to be a specimen dating back to the early Cretaceous period. Related Links:
