Meteorite dating methods

meteorite dating methods

Can meteorites be dated by radiometric dating?

Some meteorites, because of their mineralogy, can be dated by more than one radiometric dating technique, which provides scientists with a powerful check of the validity of the results. The results from three meteorites are shown in Table 1.

How old is a meteorite?

Because of their importance, meteorites have been extensively dated radiometrically; the vast majority appear to be 4.4–4.6 Ga (billion years) old. Some meteorites, because of their mineralogy, can be dated by more than one radiometric dating technique, which provides scientists with a powerful check of the validity of the results.

What is the most primitive type of Meteor?

The most primitive type of meteorites are called chondrites, because they contain little spheres of olivine crystals known as chondrules. Because of their importance, meteorites have been extensively dated radiometrically; the vast majority appear to be 4.4–4.6 Ga (billion years) old.

Which nuclides are used in meteorite dating?

Only the latter two extinct nuclides are used in dating. The use of 14C in meteorite dating is solely based on its production by cosmic rays (and for terrestrial samples, with its production in the atmosphere). 26Al and some other nuclides not mentioned are also used in this way.

How old is a meteorite?

Because of their importance, meteorites have been extensively dated radiometrically; the vast majority appear to be 4.4–4.6 Ga (billion years) old. Some meteorites, because of their mineralogy, can be dated by more than one radiometric dating technique, which provides scientists with a powerful check of the validity of the results.

What is the most easily dated meteorite dating technique?

Increasingly, the other techniques are used, such that probably no one technique dominates for meteorite dating. Rb-Sr is a good example for explaining the process, however. Near the end you imply that low petrologic type chondrites are the most easily dated.

Why is radiometric dating difficult for young Earth creationists?

Radiometric dating of rocks and minerals using naturally occurring, long-lived radioactive isotopes is troublesome for young-earth creationists because the techniques have provided overwhelming evidence of the antiquity of the earth and life.

How do you analyze a meteorite?

Typical analyses include investigation of the minerals that make up the meteorite, their relative locations, orientations, and chemical compositions; analysis of isotope ratios; and radiometric dating. These techniques are used to determine the age, formation process, and subsequent history of the material forming the meteorite.

Although most meteorites have ages around 4.5 billion years, a small subset has ages around 1.3 billion years. What caused the substantial difference in age between these two populations of meteorites? a. These meteorites just happened to form later than most meteorites. b. Not all meteorites hit Earth in the early Solar System.

What are the different types of stony meteorites?

What is 14C used for in meteorite dating?

The use of 14C in meteorite dating is solely based on its production by cosmic rays (and for terrestrial samples, with its production in the atmosphere). 26Al and some other nuclides not mentioned are also used in this way. Thus, although extinct, these nuclides are present in meteorites, but produced by a more recent process.

Are there any nuclides in meteorites?

Thus, although extinct, these nuclides are present in meteorites, but produced by a more recent process. The idea that Rb-Sr is the most used chronometer for meteorites is largely based on work done 10-30 years ago. Increasingly, the other techniques are used, such that probably no one technique dominates for meteorite dating.

What is Cosmogenic Nuclide dating used for?

Cosmogenic nuclide dating can be used to determine rates of ice-sheet thinning and recession, the ages of moraines, and the age of glacially eroded bedrock surfaces. For glaciation, the most common application of cosmogenic nuclide dating is to date the exposure age of glacially transported rocks.

What is the most easily dated meteorite dating technique?

Increasingly, the other techniques are used, such that probably no one technique dominates for meteorite dating. Rb-Sr is a good example for explaining the process, however. Near the end you imply that low petrologic type chondrites are the most easily dated.

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