Influência da composição mineralógica e textural na condutividade térmica de rochas ígneas e metamórficas em uma área a norte do lineamento Patos, Província Borborema (NE-Brasil)

Abstract

This study evaluated the influence of mineralogical and textural composition on the thermal conductivity of igneous and metamorphic rocks from the northern por-tion of the Borborema Province, north of the Patos Lineament. Analysis of 93 sam-ples, 86 of which were crystalline rocks (monzogranites, syenogranites, and granodi-orites), revealed significant variations in thermal conductivity correlated with minera-logy, textures, and lithotypes. Results highlighted quartz content as the main control-ling factor, showing a positive relationship with conductivity, while mafic minerals and feldspars lowered values due to their less efficient thermal properties. Homogeneous textures and fine-to-medium grain sizes enhanced thermal conduction in quartz-rich rocks, whereas coarse/porphyritic textures displayed higher thermal connectivity due to crystal size. These findings enhance the understanding of the thermal properties of Borborema Province rocks, with implications for geothermal studies and tectono-thermal modeling.