pan lang="EN-US">The Pusangguo copper-polymetallic deposit is located in Nanmulin volcanic basin. Petrographic and geochemical studies of granodiorite, granodiorite-porphyry and diorite-porphyrite show that the intrusive rocks are of calc-alkaline series, with ωpan>pan style="font-family: 宋体; mso-ascii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’;">(pan>pan lang="EN-US">SiO3pan>pan style="font-family: 宋体; mso-ascii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’;">)pan>pan lang="EN-US"> ranging from 59.08% to 67.28%, ωpan>pan style="font-family: 宋体; mso-ascii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’;">(pan>pan lang="EN-US">Al2O3pan>pan style="font-family: 宋体; mso-ascii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’;">)pan>pan lang="EN-US"> ranging from 15.38% to 16.86% ωpan>pan style="font-family: 宋体; mso-ascii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’;">(pan>pan lang="EN-US">MgOpan>pan style="font-family: 宋体; mso-ascii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’;">)pan>pan lang="EN-US"> ranging from 1.52% to 4.06%, and copan>pan style="font-family: 宋体; mso-ascii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’;">(pan>pan lang="EN-US">TFeOpan>pan style="font-family: 宋体; mso-ascii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’;">)pan>pan lang="EN-US"> ranging from 1.2% to 3.46%. Petrographic and geochemical studies indicate that granodiorite-porphyry and diorite-porphyrite were produced by Tethys subduction towards pan>