On Possible Rheological Constraints On Lithosphere Geothermal Models

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Journal Article: On Possible Rheological Constraints On Lithosphere Geothermal Models

Abstract
It is assumed that earthquakes are manifestations of a brittle response of rocks to stress and that a cutoff in seismicity within the crust marks the transition from brittle mode of response to ductile behaviour. The influence of mineralogical composition and physical environmental factors on the depth of the brittle-ductile transition boundary (and therefore on the temperature of this transition) is investigated quantitatively. It is shown that the transition temperature is assessed at least as accurately as are assessments of geothermal modelling. Therefore, in areas where cutoffs in seismicity can be identified with certainly, the crustal seismicity variations can serve as an indicator of the temperature at the depth where seismicity ceases. The work of such a "geothermometer" is illustrated on two examples from Central Japan.

Authors 
B. Bodri and S. Iizuka








Published Journal 
Journal of Geodynamics, Date Not Provided





DOI 
10.1016/0264-3707(93)90018-2


 

Citation

B. Bodri,S. Iizuka. . On Possible Rheological Constraints On Lithosphere Geothermal Models. Journal of Geodynamics. (!) .