Thin and Dispersed Gold Placer of the Sedimentary Cover of the Northwestern Black Sea Coast. Problems and Prospects

Lomakin, I.E.; Kochelab, V.V.

doi:10.15407/gpimo2019.01.087

Cited by 6 publications

(2 citation statements)

References 2 publications

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“…It does not provide a precise representation of the genuine situation and, as such, has preliminary informational value. This perspective has been expounded upon in our prior discussions [18][19][20]. The mobility of particles primarily consisting of STDG (small, thin, dust-like gold) and smaller particles, transported by clay-laden water streams, is exceptionally high.…”

Section: Discussion Of Resultsmentioning

confidence: 94%

“…It is worth noting that we exclude consideration of gold placers found in the modern alluvial deposits of the Dniester River [10,22], as we believe their primary sources are not directly linked to the gold ore deposits of the UCS. In the coastal regions of the Black and Azov Seas, which are considerably distant from the recognized original sources within the Ukrainian Crystalline Shield (UCS), there have been numerous instances of obtaining samples containing STDG and dispersed placer gold in the bottom sediments [8,9,18,21,23,[26][27][28][29][30]. These findings provide further confirmation that a significant portion of gold can be transported over substantial distances in suspension within clayladen water flows and subsequently deposited.…”

Section: Materials and Methodologymentioning

confidence: 89%

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Features of Gold Placer Formation in the Ukrainian Crystalline Shield And Southern Ukraine

Lomakin,

Sarvirov,

Kochelab

2023

Earth Sciences and Human Constructions

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The presence of numerous native gold deposits of the Ukrainian Crystalline Shield (UCS), as well as the spread of placer gold manifestations, determines the high probability of the formation here of gold placers with industrial parameters. The main factors and geological conditions that contribute to the formation of gold placers are manifested at the UCS. An important reason for the failures of previous geological works is the outdated scientific and methodological platform, which involved the search for typical gold-bearing deposits with metal of gravity size classes. They did not take into account the possibility of significant movement of placer gold in the geologically clay water flow and the formation of long-distance placers. The traditional Schlich method used in the study did not make it possible to determine the actual gold content when particles with a size smaller than 0.25 mm predominate in the sample, which is precisely the particle size of the primary sources of the UCS. The applied means of research could not be effective in the absence of the necessary analytical base for determining the gold content, modern methods of studying the geological structure and tectonics of the territories. The negative results did not provide any real grounds for further specialized large-scale research and prospecting for placer gold. Today, it is getting obvious that placer gold of small and fine classes can easily move over considerable distances in the water flow and form accumulations not only in boulder-pebble material, but also in pelitic sediments. Due to repeated block movements, erosion and redepositing of gold-bearing accumulations in secondary reservoirs could occur. In this aspect, neotectonic studies (using materials from space surveys) become the main predictive and prospecting method for identifying promising areas of placer gold concentration in the region. When carrying out fieldwork, drilling and modern methods of laboratory analysis of gold samples should be used. The results of many years of research give hope for the discovery of real placer gold deposits in the Northern Black Sea region in the near future.

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Section: Discussion Of Resultsmentioning

confidence: 94%

Section: Materials and Methodologymentioning

confidence: 89%

Features of Gold Placer Formation in the Ukrainian Crystalline Shield And Southern Ukraine

Lomakin,

Sarvirov,

Kochelab

2023

Earth Sciences and Human Constructions

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On the problem of studying placer manifestations with small and thin gold in the Northern Black Sea coast of Ukraine

Sarvirov¹

2019

Geol. polezn. iskop. mirov. okeana

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Current issues of search of gold placers in the south of Ukraine

Lomakin¹,

SARVIROV²,

Kochelab³

2020

Geol. polezn. iskop. mirov. okeana

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The main gold ore territory of Ukraine is Ukrainian shield, mainly its central and eastern parts. Currently, the potential of Ukrainian shield is estimated at 2.4 thousand tons of gold. Gold ore deposits are insufficiently studied and not brought to development. The same can be said about the development of gold placers. But in the case of shallow deposits its study and development may be economically justified, it does not require large capital investments and allows to recoup costs in a short time. This is especially true given the extremely favorable situation on the world gold market in recent years. Erosion and denudation of native deposits certainly led to the formation of deposits of native placer gold in the sedimentary cover on the territory of the Ukrainian shield and its slopes. Significant amounts of geological information on the widespread distribution of placer gold in loose sediments, in the modern basins of the Dnieper, Southern Bug, Don, Black and Azov Sea shelf, have been accumulated. This corresponds to the location of indigenous sources of gold and the general direction of unloading of river systems. Previous geological studies in this area have revealed numerous manifestations of placer gold of various scales, but no industrial facilities have been recorded. Placer gold in the south of Ukraine is characterized by a high mass fraction of gold of small and thin size classes and significantly aleurite-clay composition of gold-bearing deposits. Such characteristics complicate the geological search and real assessment of gold-bearing objects and, provided that standard sampling and processing methods are used in geological works, lead to underestimation of the real gold content. Studies conducted on the most studied placer sites convincingly show that gold is lost when washing samples, even under careful control. And this is a typical situation for many objects (not only Ukrainian), which were studied using the standard method of extracting free gold by gravity. That is why there are reasonable doubts about the reliability and quality of the current assessment of placer gold deposits. In our opinion, the prospects for the search for loose gold on the Ukrainian shield and its slopes are significantly underestimated. The presence of indigenous sources with great resource potential and at the same time numerous known manifestations of different ages and scales of placer gold clearly indicate the possibility of the formation of placers with industrial characteristics in the sedimentary stratum of southern Ukraine. The use of modern technologies for the gold enrichment and extraction, high-precision analytical research and the favorable state of the world gold market force to urgently review the results of previous geological work. The problem of conducting new comprehensive research aimed at auditing the accumulated data, identifying, and studying of placer deposits namely with gold of small and thin size classes is becoming urgent. The result of such work should be the discovery and industrial development of gold placers, which can be the basis of gold production in Ukraine.

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Thin and Dispersed Gold Placer of the Sedimentary Cover of the Northwestern Black Sea Coast. Problems and Prospects

Cited by 6 publications

References 2 publications

Features of Gold Placer Formation in the Ukrainian Crystalline Shield And Southern Ukraine

Features of Gold Placer Formation in the Ukrainian Crystalline Shield And Southern Ukraine

On the problem of studying placer manifestations with small and thin gold in the Northern Black Sea coast of Ukraine

Current issues of search of gold placers in the south of Ukraine

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