Radioactive isotope dating rocks

Zircon has a high hardness (7.5) which makes it resistant to mechanical weathering, and it is also very resistant to chemical weathering. Chemically, zircon usually contains high amounts of U and low amounts of Pb, so that large amounts of radiogenic Pb are produced.

Other minerals that also show these properties, but are less commonly used in radiometric dating are Apatite and sphene.

Pb leakage is the most likely cause of discordant dates, since Pb will be occupying a site in the crystal that has suffered radiation damage as a result of U decay.

The half-life is the amount of time it takes for one half of the initial amount of the parent, radioactive isotope, to decay to the daughter isotope.

An event like metamorphism could heat the crystal to the point where Pb will become mobile.

Another possible scenario involves U leakage, again possibly as a result of a metamorphic event.

His Ph D thesis was on isotope ratios in meteorites, including surface exposure dating.

He was employed at Caltech's Division of Geological & Planetary Sciences at the time of writing the first edition.

The dating equation used for K-Ar is: Carbon Dating Radiocarbon dating is different than the other methods of dating because it cannot be used to directly date rocks, but can only be used to date organic material produced by once living organisms.

Please or register to post comments
If spammers comment on your content, only you can see and manage such comments Delete all
Radiometric dating of rocks also tells how much time has passed since some event occurred. It is only the carbon-14 isotope that is radioactive. 
02-Jan-2019 17:10
Reply
Numerical and Relative Ages for Rocks. A. example, decay of the parent isotope Rb. since the advent of radioactive age-dating techniques. 
02-Jan-2019 17:14
Reply
K-Ar Dating. 40 K is the radioactive isotope of. young rocks or in dating whole rocks instead of. most useful for radiometric dating and what are. 
02-Jan-2019 17:17
Reply
Radiometric dating or radioactive dating is a technique used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they were formed. 
02-Jan-2019 17:20
Reply
Radioactive dating is a method of dating rocks and minerals using radioactive isotopes. This method is useful for igneous and metamorphic rocks, which cannot be dated by the stratigraphic correlation method used for sedimentary rocks. 
02-Jan-2019 17:24
Reply
Radiometric dating. Each radioactive isotope has its own unique half-life. • Method of dating very old rocks by means of the amount of 
02-Jan-2019 17:29
Reply
Clocks in the Rocks. problems with radioactive dating for geological. both of those difficulties by using the non-radioactive isotope strontium-86 as a. 
02-Jan-2019 17:32
Reply

Radioactive isotope dating rocks introduction

Radioactive isotope dating rocks