نتایج جستجو برای: fission track

تعداد نتایج: 78046  

2002
A.J.W. Gleadow P. G. Fitzgerald

Fission track analysis of apatites from basement rocks of the Wright Valley in southern Victoria Land provides information about the timing. the amount and hence the rate of uplift of the Transantarctic Mountains in this area. Apatite ages increase systematically with elevation, and a pronounced break in the age versus elevation profile has been recognised at about 800 m on Mt. Doody near the m...

Journal: :Journal of Earth System Science 1981

Journal: :Chemical Geology 2022

Fission-track annealing models aim to extrapolate laboratory kinetics the geological timescale for application studies. Model trends empirically capture mechanisms of track length reduction. To facilitate interpretation fission-track trends, a formalism, based on quantities already in use study physicochemical processes, is developed and allows calculation rate constants, Arrhenius activation e...

Journal: :Journal of the Anthropological Society of Nippon 1970

2004
MARK T. BRANDON Mark T. Brandon

The external-detector method of fission-track (FT) dat­ ing is capable of providing FT ages for individual mineral grains. As a result, tliis method when applied to dating detrital zircons in unreset sandstone samples has much potential for resolving the depositional age and provenance of the samples. One problem is that individual FT grain ages for detrital zircons usually have fairly low prec...

2011
B. Afra M. Lang M. D. Rodriguez N. Kirby R. C. Ewing C. Trautmann P. Kluth

Fission tracks in minerals, such as apatite and zircon, generated by energetic nuclear fragments that result from spontaneous fission of U, are used for determining the age and thermal history of Earth’s crust. Taken together with other techniques, the data infer rates of tectonic uplift and landscape evolution [1]. At elevated temperatures, these tracks shrink in size and fragment into section...

Journal: :Palaeogeography, Palaeoclimatology, Palaeoecology 2021

Understanding the formation of Qilian Shan in NE Tibetan Plateau provides insights into growth mechanisms northern portion plateau through time. The onset time exhumation is still debated. Qinghai Nan subrange, located southeastern Shan, cut by Yellow River that forms Longyang Gorge, providing a good vertical profile for thermochronological investigation exhumation. In this paper, we reconstruc...

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