STUDY OF COMPLEX GOLD-BEARING ORE OF DELKEN DEPOSIT AND ASSESSMENT OF ITS TECHNOLOGICAL PROPERTIES

Abstract

The article is concerned with the first stage of research on the precious metal mineralization of the
Delken gold ore deposit (Nizhneamursk ore district),
located in the Khabarovsk Territory. Delken ore body
system is stretched for 8 kilometers in the north-east
direction and is controlled by Limurchan snap of regional meaning. The deposit area is composed of Triassic and Jurassic sedimentary deposits: siliceous
rocks, siltstones, sandstones, with interlayers of
gravelites and conglomerates. Sedimentary strata
erupt with numerous diverse in composition dykeshaped bodies and dykes of middle and acidic composition of Cretaceous period. Streaky and metasomatic
silicification zones are characteristically. Orebearing structures are crushing and intense fracturing
zones of rocks, metasomatically altered, with intense
fine-grained silicification.
The results of studies of gold in quartz-feldspar metasomatites on diorites, which showed the highest gold
content according to chemical analysis, are presented. We show the geological characteristics of the
field. The content of gold in the fine particle size classes is - 16 g/t (-0,071+0,04) and 46 g/t (-004+0,0). A
reduced mineralogical analysis established the dimension of visible gold particles up to 1.5 mm. They
have a complex morphology. The paper contains
characteristics of a valuable component in each size
fraction. All gold particles are joints with quartz. The
main composition is gold with an admixture of silver
(up to 10% by weight) and lead (up to 15% by weight) in all size classes. The content of impurities varies in
the range of 2-3%. The close intergrowth of gold with
quartz during the crushing process will not ensure the
complete release of gold. Gold joints with quartz are
difficult liberated, characterized by tabular morphology. Tabular gold tends to float and is not particularly amenable to gravity processing. Due to the presence of finely dispersed gold, technological studies
using leaching method are necessary. Considering the
characteristics of gold, it is necessary in the development of technology to apply a complex of mineral
processing methods.