- 责任者：Liu Yan (Key Laboratory of Metallogeney and Mineral Assessment ; Institute of Mineral Resources ; CAGS ; Beijing 100037 ; China) ; Jiang Sihong
- 刊名：Mineral Deposits
- 出版年：2011
- 卷期：30(5)
- 关键词：银矿 ; silver ores ; 多金属矿 ; polymetallic ores ; 内蒙古 ; Inner Mongolia
- 页码：p.837-854
- 图表：7 illus., 3 tables, 11 refs.
- 分类号：1001
- issnNo：ISSN0258-7106
- isbnNo：CN11-1965/P
Bairendaba and Weilasituo are two silver-polymetallic deposits discovered in recent years in eastern Inner Mongolia. Mineragraphic studies by using the SEMEDX revealed the modes of occurrence of the silver-bearing minerals such as allargentium, dyscrasite, argentobismutite, freibergite and native silver. Metallic minerals in these two deposits are summarized systematically, including their modes of occurrence and formation sequences. The commonly existent jelly-like pyrite is regarded as the product of the earliest ore-forming stage, suggesting a hot water sedimentary environment at low temperature. During the later meso-hypothermal ore-forming process, the assemblage of pyrite + sphalerite + galena + pyrrhotite + chalcopyrite + arsenopyrite + cassiterite was formed. Subsequently, these minerals were crushed and mylonitized intensely, and the ores were characterized by plastic deformation-brecciated and mylonitic structure.