Cihan Yalcin
High-resolution geophysical and geochemical assessment for Cr-Ni deposit identification in ophiolitic complexes: the Arızlı case study (Afyon, Turkey)
Santrauka The present study investigates the mineralization potential of the Arızlı ophiolitic complex in Afyon, Turkey, employing an integrated methodology that combines sophisticated geophysical and geochemical techniques. The area, characterized by ultramafic rock types and intricate structures, exhibits significant enrichment in chromium (Cr
2O
3, up to 49.51%) and nickel (Ni levels exceeding 2,000 ppm), particularly in serpentinized dunite regions. High-resolution drone-based magnetic surveys have detected anomalies indicative of ore-rich zones, with spatial data refined to resolutions of 50 m, 100 m, 150 m, and 250 m. Complementary IP/ERT profiling has identified chargeability and resistivity anomalies that align with the geochemical results. The geochemical investigation, performed using XRF, ICP-MS, and XRD, has confirmed these anomalies, revealing a complex mineralization framework mainly consisting of chromite, serpentine, and sulfide minerals, including pyrite and pentlandite. A comparative examination with global chromite-bearing ophiolites, including those in Oman and Greece, underscores the Arızlı region’s correlation with economically significant deposits. The research highlights the influence of structural discontinuities, fault-induced hydrothermal modifications, and brecciation processes on the distribution of minerals. This research highlights the benefits of integrating geophysical and geochemical techniques for studying chromite and nickel in ophiolitic environments. The employed methodology may act as a reference framework for analogous studies in structurally intricate ultramafic terrains.
Doi https://doi.org/10.5200/baltica.2025.2.1 Raktažodžiai Arızlı ophiolitic complex; chromium and nickel mineralization; drone-based magnetic survey; induced polarization; geochemical analysis; ultramafic lithologies
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