Comparative characteristics of the gold content in terrigenous-carbonate deposits of the Almalyk Ore Region with deposits of the Karlin Type

For the first time in Uzbekistan, studies on gold content in terrigenous-carbonate deposits of the Almalyk ore region were conducted by M.A.Munduzova, S.T.Badalov and others.The gold content was determined bothin the rocks composing these strata and individual occurrences within them.Gold mineralization in terrigenous-carbonate strata can be one of the unconventional sources of gold mineralization.The selected samples from gray, black dolomites containing organic compounds (bituminous) were analyzed both in laboratories of the Republic of Uzbekistan and in laboratories of the USA.The convergence of the results obtained in the laboratories of the two countries was confirmed.Gold mineralization in terrigenous-carbonate rocks in both provinces is finely dispersed, difficult to diagnose and difficult to extract.The author continues the laboratory and technological research on the extraction of gold from terrigenous-carbonate rocks, including studies to determine the relationship of thin, scattered gold with organic matter in black, bituminous dolomites.Gold in sedimentary terrigenous-carbonate rocks is finely disseminated with organic matter.Carlin-type gold deposits are hosted in carbonate sediments and are represented by fine-grained sulfide mineralization.Varieties of gold are distinguished: films on the surface of pyrite and amorphous carbon, gold-organic compounds, native gold, gold in realgar and native arsenic.The most favorable prospecting and predictive signs of such mineralization in the Chatkal-Kurama region are lithological and structural factors, certain formations and areas of conjugation of multidirectional faults and interformational positions in the form of scanning, ferruginization, crushing and other secondary changes.

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