isochron , także: isochrone

As illustrated in figure 1, this point defines the lower (left) end of the isochron.

Indeed the initial amount of the daughter product can be determined using isochron dating.

If all data points lie on a straight line, this line is called an isochron.

One of the best known isotopic systems for isochron dating is the rubidium-strontium system.

Other systems that are used for isochron dating include samarium-neodymium, and uranium-lead.

To mitigate this effect it is usual to date several minerals in the same sample, to provide an isochron.

Dating is achieved usually by trying to produce an isochron of several minerals within a rock specimen.

Rhenium-Osmium dating is carried out by the isochron dating method.

Improving isochron calculations with robust statistics and the bootstrap.

These samples define an isochron in figure 1, whose slope gives the age of meteorites as 4.55 Byr.

Statistics for several meteorites that have undergone isochron dating are as follows:

This was representative of the Bulk Earth composition, and was plotted on the isochron.

Plotting an isochron (straight-line graph) is used to solve the age equation graphically.

An isochron is calculated normally.

Ferroan anorthosites have been dated using the internal isochron method at "circa" 4.4 Ga.

The Re-Os isochron is defined by the following equation:

The slope of the isochron, , represents the ratio of daughter to parent as used in standard radiometric dating.

In the mathematical theory of dynamical systems, an isochron is a set of initial conditions for the system that all lead to the same long-term behaviour.

Lead isotope isochron diagram used by C. C. Patterson to determine the age of the Earth in 1956.

In an isochron dating plot, the Al/Mg ratio plotted isAl/Mg.

The base age of approximately 635 million years ago is based on U-Pb (uranium-lead) isochron dating from Namibia and China.

The stable and relatively abundant osmium isotope Os is used to normalize the radiogenic isotope in the isochron.

Sinter deposits associated with active fumaroles on the caldera rim of Emuruangogolak volcano have a U-series isochron age of 293kyr.

However, construction of an isochron does not require information on the original compositions, using merely the present ratios of the parent and daughter isotopes to a standard isotope.