Dating sediment burial with in situ-produced cosmogenic nuclides: theory, techniques, and limitations
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چکیده
منابع مشابه
Dating sediment burial with in situ-produced cosmogenic nuclides: theory, techniques, and limitations
Dating sediment burial over million-year time scales is crucial in many areas of the Earth sciences and archeology, but is often difficult using traditional techniques. Sediment burial can be dated by the radioactive decay of cosmogenic nuclides, provided that the sediment was exposed to cosmic rays prior to burial. Dating calculations are straightforward if sediment is buried deeply and rapidl...
متن کاملTerrestrial in situ cosmogenic nuclides: theory and application
The cosmogenic nuclide exposure history method is undergoing major developments in analytical, theoretical, and applied areas. The capability to routinely measure low concentrations of stable and radioactive cosmogenic nuclides has led to new methods for addressing long-standing geologic questions and has provided insights into rates and styles of sur"cial processes. The di!erent physical and c...
متن کاملChapter 4: Principles of Exposure Age Determination Using Terrestrial in Situ Produced Cosmogenic Nuclides
After the discovery of the cosmic radiation in the 1910’s, Grosse (1934) was the first who suggested that the cosmic radiation could produce radioactive nuclides at the surface of the Earth. The next step towards the utilisation of cosmogenic nuclides in earth sciences was the discovery of Libby (Libby et al. 1949) in the late 1940s: during its interaction with the atmosphere, cosmic radiation ...
متن کاملComment on `Scaling factors for production rates of in situ produced cosmogenic nuclides: a critical reevaluation'
In a recent paper, Dunai [1] discusses several problems with the altitude and latitude scaling of production rates given by [2^4]. Dunai describes three major £aws in Lal's scaling: (1) cosmic-ray measurements are ordered according to geomagnetic latitude calculated from an axial dipole representation of the geomagnetic ¢eld; (2) the high-altitude (atmospheric depth 580^770 g cm32) attenuation ...
متن کاملScaling factors for production rates of in situ produced cosmogenic nuclides: a critical reevaluation
New scaling factors are presented describing the altitude and latitudinal dependence of production rates for in situ produced cosmogenic nuclides. The new factors incorporate the influence of the non-dipole contributions to the geomagnetic field on the cosmic ray flux. The currently used scaling factors of Lal [Earth Planet. Sci. Lett. 104 (1991) 424^439] are based on the assumption of a dipole...
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ژورنال
عنوان ژورنال: Earth and Planetary Science Letters
سال: 2001
ISSN: 0012-821X
DOI: 10.1016/s0012-821x(01)00309-0