Isotope dating of rocks

There are many applications of isotope geochemistry, some which have been utilized for geothermal exploration.

Isotopic analysis can be used to investigate the thermal history of a reservoir, to determine the degree of water-rock interaction that has occurred in a system, and to date hydrothermal alteration minerals.

The hydrothermal fluids circulating in a geothermal system have a unique signature that can be used to determine where that water came from, how old it is, whether it has mixed with other fluids, and which direction it is moving in.

isotope dating of rocks-53

Now it is time to put those math skills to good use.

At one half-life, you would have approximately 50% Carbon-14 and 50% Nitrogen-14.

The half-lives of several radioactive isotopes are known and are used often to figure out the age of newly found fossils.

Different isotopes have different half-lives and sometimes more than one present isotope can be used to get an even more specific age of a fossil.

Isotopic analysis is typically conducted by hydrologists, biologists, and geochemists.

There are many different isotopes, but they all generally fall into two categories; radioactive or stable.

The Δ18O values of greenstones metamorphosed from spilitic basalts during (post-Cretaceous? The D/H ratios of actinolite, chlorite, and micas in host rocks were also strongly altered during this episode.

These isotopic results suggest that the vein and alteration minerals formed through interaction of marine silica and carbonate with ocean water entrapped in sediments at about 200°C.

This technique relies on the property of half-life.

Half-life is defined as the time it takes for one-half of a radioactive element to decay into a daughter isotope.

Isotopes are atoms of the same element that have different numbers of neutrons.

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