İnlice (Konya-Türkiye) Yüksek Sülfidasyon Epitermal Altın Yatağının Jeolojisi, Alterasyonu ve Jeokimyasal Karakteristikleri.

Terzi, Mustafa Haydar; Yılmazer, Erkan; Kuşcu, İlkay; Bozan, Sercan

Inlice high sulphidation epithermal gold deposit is located in the Erenlerdağ-Alacadağ Volcanic Complex (EAVC), approximately 40 km southwest of Konya city centre. The volcanic and volcano-sedimentary rocks seen in the study area are andesite, block and ash flow, basaltic andesite lava flow and andesite lava flow, from oldest to youngest. The youngest units unconformably covering the volcanic and volcano-sedimentary rocks are talus and alluvium. Four different alteration zones in the andesites moving from the centre of the alteration toward fresh rock are i) silicified zones (consisting of vuggy-sugary and chalcedonic/opaline quartz veins), ii) advanced argillic alteration, iii) intermediate argillic and iv) propylitic alteration. In addition, a potassic alteration zone consisting of magnetite, quartz, biotite and anhydrite was identified in the deep part of the Merkez Zone. The mineralisation is commonly represented by pyrite, and to a lesser extent enargite, chalcopyrite, covellite, chalcocite, sphalerite and marcasite. Petrographically, the fine-grained gold grains (between 2-6 µm) are only observed in areas where sulphide minerals are oxidised. The degree of geochemical variation in the alteration zones decreases from silicified zones to propylitic alteration, and this variation is largely consistent with the mineralogies observed in these zones. Moreover, enrichment in As, Sb, Bi, Ag and Au, and depletion in Zn and Ni are especially notable from fresh/least altered andesites towards advanced argillic alteration and silicified zones. In addition, studies showed that the high Pb value in chalcedonic/opaline textured quartz veins and low Rb/Sr value in advanced argillic alteration and silicified zones can be used as a geochemical guide, at least for the Inlice region.

KONYA (Turkey); GOLD ores; GEOCHEMISTRY; ANDESITE; VOLCANIC ash, tuff, etc.

Mathematical Reports, 2023, Vol 25, Issue 1, p23

1582-3067

Academic Journal

10.25288/tjb.1131745