Metallogenic Characteristics and Prospecting Prediction of Carbonatite Vein-Type Re-Mo Deposits in Huanglongpu Ore Field，East Qinling

The Huanglongpu molybdenum ore field, situated in the western region of the East Qinling metallogenic belt on the southern margin of the North China block, represents the only concentration area of carbonatite-type molybdenum deposits worldwide, and spatially controlled by the Lushi-Machaoying fault. On the basis of previous research results, This study presents a systematic sorting and comprehensive analysis of the regional geological setting, metallogenic characteristics and typical deposits of the Huanglongpu ore field. The formation of carbonate vein-type molybdenum deposits is closely related to the magmatic activities during the Indosinian period, with the favorable structural framework providing ore-bearing spaces and the surrounding rocks contributing trace ore-forming materials. The study delineates two primary ore-forming belts, namely the NW-oriented Yuantou-Nianziping rhenium-molybdenum polymetallic ore (mineralization) belt and the NE-oriented Xiping-Qinlinggou molybdenum-copper ore (mineralization) belt, comprising two third-level ore-forming zones and two fourth-level ore-forming zones. The Re and Mo contents generally exhibit a positive correlation. The ore-forming fluid is mainly characterized as magmatic water from the medium-high temperature silicate-carbonate-sulfate system, with ore-forming materials predominantly derived from mantle-derived igneous magma during the late Indosinian period, and it has roughly gone through three main mineralization stages. This study conducts prospecting predictions from multiple perspectives, there are promising prospects for molybdenum prospecting in the northeastern end of the ore field extending toward Henan and on both sides of the Lushi-MaChaoying fault at the southwest end. Additionally, the Huayangchuan-Taiziping mineralization belt and the lower part of the rock mass in the northwest of the ore field hold potential for large and medium-sized molybdenum polymetallic deposits.