MORPHOLOGY AND GENESIS OF FINE GOLD IN MODERN SEDIMENTS OF THE BLACK SEA
Journal Title: Вісник Одеського національного університету. Географічні та геологічні науки - Year 2014, Vol 19, Issue 4
Abstract
Research the morphology and composition of the gold is one way to determine the genesis of fine gold in modern sediments. The purpose of these studies is the morphological characteristics of fine gold, to study the composition of gold, and determine the genesis of fine gold in the Black Sea sediments. The subject of the research is fine gold of modern sea sediments of the North-Western Black Sea shelf. The methodology involves the preparation of sediment samples from the sea depths up to 95 m, the depth of sampling columns – up to 4 m. Was studied over a thousand samples of different lithological types of bottom sediments. Studied the morphology of more than 300 gold particles. Composition of gold was determined of emission spectral analysis and X-ray microprobe studies. The maximum concentration of gold is set in sediments Dnieper depression. The gold particles have a size from 0.005 mm to 0.3 mm. The genesis of gold was determined by particle morphology and confirmed by the results of the analysis of its composition. Terrigenous gold has a flat or form, splices with quartz sometimes present. Authigenous gold has a spherical or round shape. Disseminated silver contained in gold, zone Cl and PbCl present. Much gold have concentric zones of different composition. This fact confirms the authigenous of gold. Processes of formation of gold in sediments are terrigenous and authigenous. Authigenous gold may be the result of biochemical deposition and submarine hydrothermal processes that are associated with endogenous sources.
Authors and Affiliations
N. Fedoronchuk
Keywords
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