Fission Track Dating - Applications

Applications

Unlike many other dating techniques, fission-track dating is uniquely suited for determining low-temperature thermal events using common accessory minerals over a very wide geological range (typically 0.1 Ma to 2000 Ma). Apatite, sphene, zircon, micas and volcanic glass typically contain enough uranium to be useful in dating samples of relatively young age (Mesozoic and Cenozoic) and are the materials most useful for this technique. Additionally low-uranium epidotes and garnets may be used for very old samples (Paleozoic to Precambrian). The fission-track dating technique is widely used in understanding the thermal evolution of the upper crust, especially in mountain belts. Fission tracks are preserved in a crystal when the ambient temperature of the rock falls below the annealing temperature. This annealing temperature varies from mineral to mineral and is the basis for determining low-temperature vs. time histories. While the details of closure temperatures are complicated, they are approximately 70 to 110 °C for typical apatite, c. 230 to 250 °C for zircon, and c. 300°C for titanite.

Because heating of a sample above the annealing temperature causes the fission damage to heal or anneal, the technique is useful for dating the most recent cooling event in the history of the sample. This resetting of the clock can be used to investigate the thermal history of basin sediments, kilometer-scale exhumation caused by tectonism and erosion, low temperature metamorphic events, and geothermal vein formation. The fission track method has also been used to date archaeological sites and artifacts. It was used to confirm the potassium-argon dates for the deposits at Olduvai Gorge.

Read more about this topic:  Fission Track Dating

Other articles related to "applications, application":

Biotechnology - Applications - Agriculture - Improved Taste, Texture or Appearance of Food
... The first genetically modified food product was a tomato which was transformed to delay its ripening ... Researchers in Indonesia, Malaysia, Thailand, Philippines and Vietnam are currently working on delayed-ripening papaya in collaboration with the University of Nottingham and Zeneca ...
Building On OpenStep
... to use OpenStep code as a basis for network-wide applications running across different platforms, as opposed to using CORBA or some other system ... which defined an operating system that applications would run in, under PDO the libraries were compiled into the application itself, creating a stand-alone "native ... of a considerable amount of supporting code (Objective-C and the libraries), PDO applications were nevertheless considerably smaller than similar CORBA solutions ...
Photoresist Categories - Applications
... Microelectronics This application, mainly applied to silicon wafers/silicon integrated circuits is the most developed of the technologies and the most specialized in the field ...
X Servers - Limitations and Criticism - Network
... to GNU Screen in relation to terminals), and other applications and toolkits provide related facilities ... interface (mouse, keyboard, monitor) of a running application to be switched from one location to another without stopping and restarting the application ... This can be important in some applications, such as process monitoring and control ...
Transistor - Comparison With Vacuum Tubes - Advantages
... that have allowed transistors to replace their vacuum tube predecessors in most applications are Small size and minimal weight, allowing the development of miniaturized electronic devices ... Lower possible operating voltages, making transistors suitable for small, battery-powered applications ... No warm-up period for cathode heaters required after power application ...