摘要
The Hardat Tolgoi Pb-Zn deposit is a medium-sized Pb-Zn deposit recently found in Erenhot-Dongwuqi polymetallic ore belt along the suture zone between the North China plate and the Siberia plate.The granite relevant to the Pb-Zn mineralization in the orefield is a concealed pluton.The LA-ICP-MS zircon U-Pb dating indicates that the granite was emplaced at 125±4.3 Ma and thus was the products of"Yanshanian"magmatism.Detailed geochemical data show that the granite is composed of weakly peraluminous(A/CNK= 0.99-1.08) rocks with low iron,high silicon,and high alkali contents(mostly Na