Isotope dating wiki

Chemical etching of polished internal surfaces of these minerals reveals spontaneous fission tracks, and the track density can be determined.

The fission-track dating technique is widely used in understanding the thermal evolution of the upper crust, especially in mountain belts.The fragments emitted by this fission process leave trails of damage (fossil tracks or ion tracks) in the crystal structure of the mineral that contains the uranium.The process of track production is essentially the same by which swift heavy ions produce ion tracks.A number of datable minerals occur as common detrital grains in sandstones, and if the strata have not been buried too deeply, these minerals grains retain information about the source rock.Fission track analysis of these minerals provides information about the thermal evolution of the source rocks and therefore can be used to understand provenance and the evolution of mountain belts that shed the sediment.

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