Abstract

Sin Quyen copper deposit is located in the northeast of Fan Si Pan Surterrane with concentrations of Fe, Cu, Au and REE are hosted in upper part of Paleoproterozoic Sin Quyen metamorphic complex. Synthesis and analysis of results of stable isotopes, isotopic dating show that the mineralization in the Sin Quyen deposit is made up of a solution of mixed magmatic-hydrothermal origin related to Neoproterozoic igneous activity formed by the subduction of the Prototethys oceanic crust to the continental crust of Yangtze. The results of paragenetic sequence of mineralization and alteration indicated that the copper mineralization of the Sin Quyen has the characteristics of IOCG type deposit, is formed in two stages: stage I is accompanied by Fe, REE, U and sodium-calcium alterations (albit and skarn minerals); stage II is accompanied by gold mineralization and potassium alteration (biotit and quartz).