line-level: 2" class=MsoNormal>weight: bold" lang=EN-US>Sulfur and Lead Isotopic Compositions of Bairendaba and Weilasituo Silver-Polymetallic Deposits, Inner Mongolia

• 责任者：Jiang Sihong (MLR Key Laboratory of Metallogeney and Mineral Assessment ; Institute of Mineral Resources ; CAGS ; Beijing 100037 ; China) ; Nie Fengjun
• 刊名：Mineral Deposits
• 出版年：2010
• 卷期：29(1)
• 关键词：银矿 ; silver ores ; 多金属矿 ; polymetallic ores ; 内蒙古 ; Inner Mongolia
• 页码：p.101-112
• 图表：3 illus., 3 tables, 14 refs.
• 分类号：1001
• issnNo：ISSN0258-7106
• isbnNo：CN11-1965/P

The Bairendaba and Weilasituo ore deposits are two silver-polymetallic deposits discovered in eastern Inner Mongolia in recent years. Researches on the sulfur and lead isotopes of the sulfides from these two deposits are reported in this paper. It is shown that the ^δ34S values of the sulfides from the Bairendaba and the Weilasituo deposit vary from -4.0‰ to +1.6‰ and from -0.8‰ to +2.0‰, respectively, close to the sulfur isotopic composition of the magmatic hydrothermal fluid, suggesting that the sulfur in both the Bairendaba and the Wei-lasituo deposit were mainly derived from the magma. It is thus inferred that the lead in ores from these two deposits might have mainly come from the wall rocks of gneiss and deep magma.