MORPHOLOGICAL CHANGES OF TECHNOGENIC GOLD FROM DUMP COMPLEXES AND CAUSES OF ITS LOSSES DURING PRIMARY MINING OF PLACERS OF THE SOLOVYEVSKY GOLD-BEARING UNIT
DOI:
https://doi.org/10.25635/2313-1586.2021.01.035Keywords:
technogenic gold, dump complexes, pit sampling, gold content, gold morphotypes, gold porosity, gold aggregates, particle size distribution, hydraulic size, platinum, silverAbstract
The effective development of technogenic alluvial gold deposits requires research aimed at establishing the causes of gold losses during the primary mining of a placer, as well as studying the properties of gold after its long staying in dumps. The paper presents the results of the study of gold from the technogenic formations of the Solovyevsky gold-bearing cluster (Upper Amur region), reveals its morphological changes in dump complexes, shows the metal content using pit sampling, and establishes the causes of gold losses during primary mining. The morphotypes of technogenic gold were studied using the scanning electron microscope "JEOL JSM-6000 PLUS" in order to determine the surface sculptures, the elemental composition of gold particles and of their inclusions. The
given data of electron microscopy diagnose the presence of platinum in gold samples up to 21 percent, as well as silver about 2 percent. The paper contains recommendations for reducing the loss of fine-grained and fine-dispersed gold during the beneficiation of sands on sluice-type washing devices.
