KO‘HITANG GABBRO-GRANITOID MASSIVI TOG‘ JINSLARINING GEOKIMYOVIY XUSUSIYATLARI (HISOR TOG‘ TIZMASINING JANUBIY-G‘ARBIY TARMOQLARI)

The article investigates the geochemical and petrogenetic characteristics of intrusive and hypabyssal rocks of the Kuhitang gabbro-granitoid massif located in the southwestern branches of the Hissar Range. Magmatic formations of different ages and compositions were systematized according to their geological relationships and petrogeochemical characteristics and grouped into the Zarabag, Shalkan, Kuhitang, and Southern Tien Shan complexes. Petrographic, mineralogical, and geochemical methods, including ICP-MS analysis, were applied. The granitoids of the Zarabag Complex are identified as I-type granites formed under geodynamic conditions characteristic of subduction zones or active continental margins. The Shalkan Complex is characterized by differentiated distributions of siderophile and lithophile elements. The Kuhitang diabase-granophyre dyke complex shows geochemical specialization in phosphorus, gold, silver, polymetals, and rare earth elements. The alkaline-basic dykes of the Southern Tien Shan Complex are interpreted as products of interaction between mantle-derived alkaline-basaltic magmas and crustal material. Analysis of primary lithogeochemical halos in the Tomchali area revealed Au–Ag–As–Pb–Zn–Cd–Cu–Bi–Sb and Mo–W–Nb–Y–Sc–REE associations, indicating the prospectivity of the area for gold–silver–polymetallic and tungsten–molybdenum–rare-metal mineralization.

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