金汞砷锑矿床中的铊

THALLIUM IN GOLD MERCURY ARSENIC AND ANTIMONY ORE DEPOSITS IN CHINA

In this paper the authors discussed in more detail thallium from following four aspects: its monomineral,content of thallium in main mineral, content of thallium in rock and ore, and the element association in connection with other element. Elements of gold, mercury, arsenic and antimony ore deposits can be grouped into three groups according to the existent form of thallium and the close degree in thallium with other element, ie. ,correlative, paragenitic and associated element. On the basis of geochemical study of ore deposits and their mineralizing mechanism, some prerequisites for prospecting these deposits have been proposed, fore xample, content of thallium in rock and ore,>10ppm, 5-10ppm, 1-5ppm, are exploration mark for the ore deposit, the mining area, and the mineral belt of gold, mercury,arsenic and antimony respectively. Hutchinonite (PbT1As5S₉) and picotpaulite(T1Fe₂S₃) has been found by author recently from Nanhua arsenic deposit, Yunnan province, China.