WANG Zheng-yang, CAO Jian-jin, WU Zheng-quan, LIN Zu-xu

Department of Earth Sciences, Sun Yat-sen University, Guangdong Key Laboratory of Geological Process and Mineral Resources Exploration, Guangzhou 510275, China

Abstract: The oxidized and leached mud had been found in the deep fracture zone of the Dongshengmiao polymetallic sulfide deposit, Inner Mongolia. Researches on the oxidized and leached mud from the perspective of particle can reflect the oxidation and the secondary changes of the sulfide minerals in the deposit, thereby, can reflect the evolution of the oxidizing environment in the deposit and can help in controlling and rehabilitating the mine environment. Scanning electron microscope study of the oxidized and leached mud showed that samples are mainly composed by metal sulphate particles, clay mineral particles and gypsum particles, as well as a small quantity of iron oxide particles. Samples in different positions are slightly different in elements compositions and other characteristics. Research showed that minerals in the oxidation leaching zone of the deposit experienced complicated epigenetic oxidation and leaching, and that the different clay minerals in different positions of the deposit indicated the different environments. These characteristics reflect the migration of the heavy metals in the deposit and the environment change of the mine.

Keywords: polymetallic sulfide deposit particles oxidation leaching SEM Dongshengmiao

*Corresponding Author, E-Mail: eescjj@mail.sysu.edu.cn

Bulletin of Mineralogy, Petrology and Geochemistry Vol. 34, No.2, 2015, page 349-353