Shear heating during distributed fracturing and pulverization of rocks | Zendy

Yehuda BenZion | Zendy; C. G. Sammis | Zendy

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Shear heating during distributed fracturing and pulverization of rocks

Author(s) -

Yehuda BenZion,

C. G. Sammis

Publication year - 2012

Publication title -

geology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.609

H-Index - 215

eISSN - 1943-2682

pISSN - 0091-7613

DOI - 10.1130/g33665.1

Subject(s) - geology , brittleness , shear (geology) , shear zone , cracking , fault (geology) , deformation (meteorology) , petrology , geotechnical engineering , seismology , mineralogy , materials science , composite material , tectonics , oceanography

We provide estimates of temperature changes produced in fault damage zones during brittle deformation associated with distributed cracking and pulverization. In contrast to localized faulting accompanied by significant frictional weakening, the relatively high friction coefficient on the multitudinous small cracks generated in the fracturing process can lead to significant shear heating. Simple calculations with parameter values constrained by laboratory experiments and simulations indicate that the temperature can increase during the generation of rock damage and pulverization by 100 °C or more. The results can help explain signatures of elevated temperature observed in geometrically complex fault zone sections with significant rock damage and regions with broad distributed deformation.

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