PRELIMINARY STUDY ON THE GEOLOGY AND METALLOGENESIS OF THE TONGXIN ANTIMONY DEPOSIT IN HUNAN PROVINCE

The Tongxin antimony deposit in Anhua County, Hunan Province occurs in the metamorphic sandstone and slate of Wuqiangxi Formation of Neoproterozoic Banxi Group. The Wuqiangxi Formation serves as the source bed, with high Sb abundance, which is 90 to 500 times more than the Clarke value and 3 to 25 times more than the regional background. The secondary structures of the major fault are the hosts of orebodies. The ore is controlled by strata, and reformed by the Cathaysian structural system, then formed with migration and concentration. The ore-forming material is derived from upper crust. The deposit belongs genetically to sedimentary reconstructed stratabound types.