Zircon U–Pb Ages and Geochemistry of Granite Porphyries in the Yangla Cu Deposit, SW China: Constraints on Petrogenesis and Tectonic Evolution of the Jinshajiang Suture Belt

Figure 5

Sketch map of Stope 41 in the tunnel 3,250 m section, Yangla copper deposit, Yunnan, China. 1: quartzite; 2: sericitic sandy slate; 3: marble; 4: granite porphyry; 5: skarn; 6: fracture zone; 7: tectonic cataclastic rocks; 8: copper ore body; 9: quartz-calcite vein; 10: base samples and corresponding numbers; 11: specimen and corresponding numbers; 12: tectonic geochemical samples and corresponding numbers; 13: fracture occurrence; 14: mineralization–lithologic alteration zones and corresponding numbers; and 15: locations and corresponding numbers of photographs (Figure 6). Zone I: weak chloritization–pyritization–silicification; Zone II: fine-veined calcitized–pyritized granite porphyry; Zone III: strong silicification–calcitization–weak pyritization; Zone IV: granite porphyry vein with strong silicification and calcitization, pyritization, chalcopyritization, and molybdenitization; Zone V: skarn-type copper ore body; Zone VI: fracture crushing zone; Zone VII: massive ore-rich body; Zone VIII: fracture crushing zone; Zone IX: yellowish-brown–brown massive garnet skarn; Zone X: massive skarn-type ore body; and Zone XI: weakly skarnified sericitic sandy slate and metamorphic quartz sandstone.