A formula describing both magnetic and isotopic blocking temperatures

Details A formula describing both magnetic and isotopic blocking temperatures A formula describing both magnetic and isotopic blocking temperatures

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978e%26psl..39...89y&link_type=abstract

Earth and Planetary Science Letters, Volume 39, Issue 1, p. 89-93.

Physics

8

Scientific paper

The following new theorem is proved: the equation E/RTB = ln(1.781 k0τ), where E = activation energy, R = the molar gas constant and TB = blocking temperature, applies equally well to both the isotopic and the magnetic systems in rocks from a cooling orogen. The isotopic model involves first-order loss of daughter, while the magnetic model applies to an assemblage of single-domain grains with constant E. Dodson supplied the original proof that the equation applied to isotopic systems. The well-known superficial similarity between the concepts of isotopic and magnetic blocking is thus given quantitative expression.

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