Identification of new objects promising for porphyry molybdenum-copper mineralization when creating the State geological map 1000/3: Sheets O-55, O-56 (Northern Priokhotye, Magadan region) as an example
DOI: 10.47765/0869-5997-2024-10006
Keywords:
The Motyklei, Chistoozerny, and Pavlovichi ore clusters; Cu-Mo-Au porphyry mineralization; porphyritic granodiorite-tonalites; quartz diorites; adakites; U-Pb SHRIMP dating; Re-Os isochron datesAbstract
The Motykleisky, Chistoozerny, and Pavlovichsky new ore clusters promising for porphyry molybdenum-copper mineralization have been identified in the Magadan region due to results of creation of the State Geological Map 1000/3, sheets O-55, O-56. The porphyry-type mineralization is associated with the Priokhotsky plutonic belt of Albian-Cenomanian granitoids of the Magadan suite of the calca-reous-alkaline series (K/Na <1). The granitoids are dominated by porphyritic tonalites and quartz diorites of type I magnetite series, often adakitic in composition. The mineralization is accommodated by the Juras-sic-Lower Cretaceous island-arc sedimentary-volcanic formations. Relationship between the minerali-zation and granitoids is substantiated by the U-Pb SIMS SHRIMP and Re-Os TIMS dating. In potential ore clusters, the mineralization is manifested by extensive fields of hydrothermal-metasomatic alterations (propylites and quartz-sericite-pyrite metasomatites). Recommendations are given for follow-up large-scale geological survey and prospecting in the area of the potential ore clusters.
