• 责任者：Zhang Huanhuan (No.6 Geological Team ; Shaanxi Bureau of Geology and Mineral Resources ; Xi’an 710611 ; China) ; Bai He
• 刊名：Geology of Shaanxi
• 出版年：2013
• 卷期：31(2)
• 关键词：金矿 ; gold ores ; 变质岩 ; metamorphic rocks ; 秦岭 ; Qinling Mountains
• 页码：p.15-20
• 图表：3 illus., 1 table
• 分类号：1001
• issnNo：ISSN1001-6996
• isbnNo：CN61-1150/P

     The metamorphosed rocks occurring in the Xiaoqinling gold field were formed by regional metamorphism and deep remelting of supracrustal rocks, typically featured in low sodium and potassium-rich with characteristics of the Archaeozoic TTG rocks. Researches performed on regional metamorphosed rocks in this area indicated that low value of gold abundance in the Taihua Group is mainly caused by non-homogeneous and multiple matrix distribution of Au element in the Taihua Group. When metamorphism and migmatitization occurred in the Taihua Group and intruded granitic rocks, Au element inside experienced hetergenization and caused early activation, resulting in Au element poor in some parts and enriched in other parts that formed gold deposits. Comparison of sulfer and lead isotopes revealed that the metallogenic materials are derived from the ancient metamorphic rocks, showing that the Archaeozoic Taihua metamorphosed rocks are the major supplier of metallogenic materials in this area.