Wednesday, November 16, 2016

Science & Technology: Research has Implications for a Global Framework of Geotherms

An Improved Method for Crustal Temperatures: Implications for a Global Framework of Geotherms (American Association for Science and Technology)

by Alexandrino C. H., Federal University of the Jequitinhonha and Mucuri Valleys, Teófilo Otoni (MG), Brazil and Hamza V. M., National Observatory, Rio de Janeiro (RJ), Brazil.

International Journal of Geophysics and Geochemistry, Vol.3 , No. 6, Publication Date: Oct. 29, 2016, Page: 61-72

Crustal geotherms of the region of Goiás Massif (GM).
The left panel indicates the vertical distribution of temperatures in the crust, while the right panel the vertical distribution of heat flow.
An improved method for calculating crustal geotherms in stable continental crust is proposed, based on integrated use of data acquired in crustal seismic and heat flow studies. 

Designated as seismo-thermal method (STM), it is based on analytical solution to the standard heat conduction problem in stratified media, coupled with empirical relations between seismic velocities and temperatures at the crust-mantle interphase. 

Use of the newly proposed method (STM) also opens up the possibility of setting up a global reference framework of deep geotherms in different tectonic settings, based on results of crustal seismic surveys.

(Thanks to GRC Member Marcelo Lippmann, Staff Scientist (retired) at Lawrence Berkeley National Laboratory for the submission.)