The effects of the minero-petrographic and geochemical characters of the processible granites in Aksaray on the physico-mechanical properties

Study area is located within the Central Anatolian Basement Units (CABU). In the study, the spectroscopic-petrographic and geochemical properties and physico-mechanical properties of the processible granites around Aksaray were determined and compared. Granites called Yaylak or Anatolian grey crop out around Yaylak and Hacımahmutuşağı, while granites called Aksaray Pink crop out around Kalebalta. The main mineralogical components of the rocks are quartz, orthoclase, plagioclase, biotite, amphibole, ± zircon, ± apatite and ± opaque mineral. Geochemically, all of the rocks are the sub-alkaline and calc-alkaline character. Granites that do not contain normative corundum, with A/CNK ratios less than 1 (Yaylakavr=0.94, Hacımahmutuşağıavr=0.95 and Kalebaltaavr=0.97), show predominantly metaluminous character at the metaluminous-peraluminous border. The physico-mechanical properties of the processible granites cropping out in Yaylak (TCavr: 3,61), Hacımahmutuşağı (TCavr: 3,50) and Kalebalta (TCavr: 3,28) locations with similar texture coefficients are also very close to each other. Therefore, physico-mechanical correlations with texture coefficients show weak relationships expressed by low regression coefficients. Likewise, some chemical alteration indexes do not show a significant change in the physico-mechanical properties. However, a significant negative relationship is observed between the fire loss (LOI) ratios of the rocks and the Schmidt hardness (R2: 0.8400), uniaxial compressive strength (R2: 0.6644) and point load strength (R2: 0.6373). When the physico-mechanical properties of granites are compared with the spectroscopic properties of the biotite minerals, it is observed that the spectra in the range of 750 - 770 cm-1, which represent Si-O-Si bending bonds between 552-1100 cm-1, become more pronounced with the increase in rock strength. As a result, comparisons have shown that granitic rocks can be approached with mineralogical, petrographic, geochemical and spectroscopic data without performing physico-mechanical tests.