Results 11 to 20 of about 1,853 (301)
Superficial Nanotextures of Placer Gold
Вестник Пермского университета. Геология, 2016 The methods of high-resolution electron microscopy were applied to study nanotextures on the surface of placer gold grains (the Urals, Siberia, Altai in Russia, Yukon Territory in Canada, etc.). Among superficial nanotextures, the cracks, furrows, pores, films, inclusions, monolayers, complicated aggregates with gold of relevant size were described. It
Osovetsky, B. M.
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Indonesian Journal on Geoscience, 2014 DOI: 10.17014/ijog.v6i1.114In 2008, placer gold was discovered in Langkowala area (Bombana Regency), Southeast Sulawesi, Indonesia, and more than 60,000 traditional gold miners in the early 2009 have been operating by digging vertical pits and panning ...
Arifudin Idrus +3 more
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KOM′YA-KURAY GOLD PLACER OF THE ATLYAN GROUP, MIASS RIVER VALLEY, AND PROSPECTS FOR FURTHER EXPLORATION OF GOLD PLACERS OF THE SOUTH URALS [PDF]
Минералогия, 2016 Fifty six minerals were identified in 231 heave concentrates from 30 boreholes of the Kom′yaKuray gold placer of the Atlyan placer group, which have been mined since 1930 to 1960 and additionally explored in 1980s–1990s.
V.I. Popova +3 more
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Placer-lode gold relationships in the Nansen placer district, Yukon
, 2016 Compositional studies have been undertaken on gold particles recovered from hypogene ore, eluvial material and placer samples in and around the Klaza property. These data have been correlated with previous descriptions of in situ mineralization to elucidate placer-lode relationships and systematic change in gold compositions between porphyry and ...
Chapman, RJ +3 more
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Placer gold deposits of Arizona [PDF]
, 1972 Eighty-seven placer districts in Arizona are estimated to have produced a minimum of 564,052 ounces of placer gold from 1774 to 1968. The location, areal extent, past production, mining history, and probable lode source summarized for each district are ...
Johnson, M.G.
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Evaluation of the contributions of gold derived from hypogene, supergene and surficial processes in the formation of placer gold deposits [PDF]
, 2021 Placer gold particles have traditionally been considered as either detrital products of weathering or authigenic minerals growing within placers. Recent advances in understanding of gold chemistry/bio-geochemistry demonstrate that gold growth in specific
Chapman, RJ +9 more
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Deformational and metasomatic transformations of detrital gold in the course of placer formation
Руды и металлы, 2023 The richest gold placers periodically mined since 1838 are known in the north of the Republic of Tyva, within the basin of the Amyl and Sistig-Khem rivers.
Hertek Ch. M., Sazonov A. M.
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PREREQUISITES FOR THE FORMATION OF GOLD SPREADS ON THE UKRAINIAN SHIELD AND ON ITS SOUTHERN FRAMING
Геологія і корисні копалини Світового океану, 2023 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 of precious metal placers with industrial parameters here.
I.E. Lomakin +2 more
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MINERAL COMPOSITION OF HEAVY CONCENTRATES OF THE KAMENNAYA SANARKA GOLD PLACER (SOUTH URALS) [PDF]
Минералогия, 2021 The paper presents the results of study of heavy concentrates from the Kamennaya Sanarka gold placer in the South Urals. The +1 mm fraction contains kyanite, garnet and staurolite, which are characteristic of host shists, whereas the –0.5 mm fraction ...
D.A. Rogov, M.A. Rassomakhin
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COARSE GOLD AND NUGGETS IN THE AMUR REGION
Известия высших учебных заведений: Геология и разведка, 2020 This paper investigates the aggregation forms, sizes and composition of native gold present in the ore deposits and placers of the Amur province. The province corresponds to the zone of the Late Mesozoic collision of geoblocks of the South-Eastern ...
V. A. Stepanov
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