What steps are involved in rb sr dating

So we have every reason to think that rocks when they form do incorporate strontium, and Sr in particular.However, there is still a way to extract a date from the rock.As with the other methods we've discussed so far, the Rb-Sr method will only work if nothing but the passage of time has affected the distribution of the key isotopes within the rock. Hydrothermal or metasomatic events may have added or subtracted rubidium and strontium to or from the rocks since their formation; or a metamorphic event may have redistributed the rubidium or strontium among its constituent minerals, which would also interfere with the method.

A relative age simply states whether one rock formation is older or younger than another formation.When we produced the formula for K-Ar dating, it was reasonable enough to think that there was little to no argon present in the original state of the rock, because argon is an inert gas, does not take part in chemical processes, and so in particular does not take part in mineral formation.Strontium, on the other hand, does take part in chemical reactions, and can substitute chemically for such elements as calcium, which is commonly found in igneous rocks.A small deviation from a straight line tells us that there is some uncertainty about the date, and this degree of uncertainty can be calculated; and if we get something which is nothing like a straight line, then the method simply doesn't supply us with a date.So just as step heating in Ar-Ar dating protects us from error, so too does the isochron method in Rb-Sr dating: it may not always lead us to the right date, but it is a good safeguard against our accepting one that is wrong.

Search for what steps are involved in rb sr dating:

what steps are involved in rb sr dating-46what steps are involved in rb sr dating-23what steps are involved in rb sr dating-22

Leave a Reply

Your email address will not be published. Required fields are marked *

One thought on “what steps are involved in rb sr dating”

  1. North America's only premier, upscale personal matchmaking firm for successful, selective singles of Indian descent Ultra Elite Indian Matches is North America's only premier, upscale personal matchmaking firm for successful Indians living in America.