Porphyry Cu systems host some of the most widely distributed mineralization types at convergent plate boundaries, including porphyry deposits centered on intrusions; skarn, carbonate-replacement, and… 1,935 PDF Zircon Compositions as a Pathfinder for Porphyry Cu ± Mo ± Au Deposits Yongjun Lu, R. Loucks, +7 authors A. Kobussen Geology 2016