Zircon dating metamorphic rocks question to ask a guy before you dating him
Therefore, if you plot the Pb/You ratios of each series involved in the dating process, the points form a line called a Concordia.
The Concordia is a graph that shows the aging of zircons.
Scientists can use monazite, titanite, baddeleyite and zirconolite for uranium dating. Zircon is commonly found as the primary mineral in igneous rocks. This means that any lead found in zircon minerals was made by radioactive decay, after the formation of the mineral. Zircon also concentrates Uranium (You) and (although less so) Thorium (Th) and excludes lead (Pb), which means it has a very high You/Pb ratio.Diagnostic CL zoning patterns, together with other zircon morphological features (e.g.roundness), will also be used to differentiate between igneous, metamorphic and sedimentary zircons.