Helium Isotope Evidence of Mantle Degassing in Rift Valley, Eastern China

中国科学通报：英文版 (1994)

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Abstract:

He found in atmosphere are considered to be produced byradioactive elements（e. g. U, Th）in the inner earth. Isotope composition of no-ble gases and ratios of their components are important geochemical indicators for thetheory of earth degassing and geochemical evolution of the mantle. The continuousand catastrophic models of earth degassing have been suggested. The mantledegassing would be actually catastrophic during geohistory and heterogeneous in dif-

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Isotope Geochemistry

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Geological and Geochemical Analysis

Geochemistry and Geologic Mapping

earthquake and tectonic studies

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