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| electrons in their outer shells, e.g., copper, silver, gold, lead, bismuth, as well as highly mobile elements...properties of loess-like rocks in the Amu-Dar'ya river valley, by V.L. Dubrovkin and Ye. Cheklina 14. ...characteristics of landslides on the upper course of the Oh' river, by Ye.V. Trepetsov 15. Reworking of the shores...Armenian Cu-Mo ore bodies are found in Yugoslavia, Bulgaria, Kazakhstan, Arizona, and elsewhere and so are...first edition . 9 11 PART I. THE EVOLUTION OF PLACERS CHAPTER I. General considerations 16 INTERNATIONAL |
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| IATAN Heavy metals in Veredaâs soil of the Formoso River basin, Buritizeiro, Minas Gerais, Brazil ......... Elena NICA Preliminary data of heavy mineral placers deposits from Petite Cote, Senegal ..............JUDE New opinion on the origin of the gold from alluvial placers of Romania ............................epithermal deposits from Romania, especially where gold is present (Fig.1e). 4. Complex carbonic fluids...melt and vapour: Extreme fluids forming porphyry gold deposits in shallow subvolcanic setting. Geol., |
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| Unique finds of golden articles in alluvial placers in Bulgaria Z.L.ăăŁăłăă©ă (Z.L.TSINTSOV) Uniquefinds...Uniquefinds from placer deposits in thewestern Bulgaria areshown to discuss theinterrelation among typesofarticles...found in this area are characterized by both the gold and the precisely fine crafts. Most of them are...Varna in the eastern Bulgaria,where the metallic articles including copper and gold products were found...western Bulgaria are also valuable in following two facts that the sites of manufacturing goldâarticles |
 | Palyanova, Galina, Kutyrev, Anton, Beliaeva, Tatiana, Shilovskikh, Vladimir, Zhegunov, Pavel, Zhitova, Elena, Seryotkin, Yurii (2023) Pd,Hg-Rich Gold and Compounds of the Au-Pd-Hg System at the Itchayvayam Mafic-Ultramafic Complex (Kamchatka, Russia) and Other Localities. Minerals, 13 (4) 549 doi:10.3390/min13040549 | Journal (article/letter/editorial) |
| minerals Article Pd,Hg-Rich Gold and Compounds of the Au-Pd-Hg System at the Itchayvayam Mafic-Ultramafic...Zhegunov, P.; Zhitova, E.; Seryotkin, Y. Pd,Hg-Rich Gold and Compounds of the Au-Pd-Hg System at the Itchayvayam...Au-Pd-Hg system in gold grains from heavy concentrates of the Itchayvayam placers and watercourses draining...investigated. Gold grains from watercourses draining and heavy concentrates of the Itchayvayam placers contain...low-fineness gold (Au0.59â0.52 Pd0.24â0.25 Hg0.17â0.23 , 580â°â660â°) and Pd,Hgpoor high-fineness gold (Au0.94â0 |
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| PHENOMENAL CRYSTALS ILIA DELEFF was born in 1921 in Bulgaria. He left his country after the Second World War...in Paris, and in 1985 he donated to his country Bulgaria a similar personal collection of unique giant...MUSEUM IN SOFIA 66 OTHER COLLECTIONS OF MINE IN BULGARIA 71 COLLECTIONS IN OTHER CITIES AROUND THE WORLD...Shumen), situated in the beautiful valley of the river Goljama Kamchija, not far from the Black Sea, famous...with my brothers along the beautiful banks of the river, where the birdsâ songs and the abundant vegetation |
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| 31â38. Native Gold in Cu- and Ni-Bearing PyroxeniteâCortlandite Intrusions and Placers of the Dambuki...numerous and high-grade gold placers. A few small primary deposits and occurrences of goldâquartz type were...were formerly considered to be the main source of placers. However, the study of widespread Early Cretaceous...Ni-bearing ultramafic intrusions has shown that gold occurring in primary CuâNi ores and products of...weathering practically does not differ from placer gold in morphology, fineness, or geochemical features |
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| Praehistorica 1â2; 27â45. Konstantinov,M. (1949): Old native gold mining in Kraiste. Minno Delo, 4, 81â84. Konyanov...Metallurgy History in Bulgaria. BAS, Sofia, 160. Marfunin, A. (1987): History of Gold. Nauka, Moskow, 246...Z. (1992): Uniquefindsofgolden articlesin alluvial placers. C. R. Acad Bulg. Sci., 4 5 6, 59â61. Tsintsov...and transportation of platinumâgroup minerals in alluvial sediments of Blagoevgrad graben. Review of the...Sperrylite from Struma River alluvial placers, Blagoevgrad graben, SW Bulgaria. N. Jb. Miner. Mh., H11 |
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| pp. 275â305. Dynamic Classification of Alluvial Gold Placers in the Northeast of Russia Yu. I. Goldfarb...of alluvial gold placers, fluvial sediments, and river valleys allowed division of these placers into...properties of placers on the dynamics of their formation, i.e., on the hydraulic size of gold grains, the...lithodynamic alluvial complex (LDAC) of the same name corresponds to each PEC. Any fractions of free gold can...the mode of transportation depends on the PEC. Placers of eight dynamic categories, brush, erosion, perluvial |
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| data, a general description of platinum-bearing placers of the Siberian Platform is given. Typomorphic...Siberian Platform, the following types of PGM placers have been recognizedârhodian ferroan platinum (Vilyuyan)...part of the Siberian Platform (Lena Pt-bearing province), placer occurrences consisting of a unique association...(rhodian ferroan platinum type) are widespread. These placers are located mainly in channels that drain Mesozoic...part of the Aldan Shield and the Stanovoy region, gold-bearing placer deposits typically contain sperrylite |
 | Fairbrother, L., Brugger, J., Shapter, J., Laird, J.S., Southam, G., Reith, F. (2012) Supergene gold transformation: Biogenic secondary and nano-particulate gold from arid Australia. Chemical Geology, 320. 17-31 doi:10.1016/j.chemgeo.2012.05.025 | Journal (article/letter/editorial) |
| paper Supergene gold transformation: Biogenic secondary and nano-particulate gold from arid Australia...Available online 7 June 2012 Editor: J. Fein Keywords: Gold Australia Arid BioïŹlm Nano-particles Geomicrobiology...sub-tropical and tropical sites promote the dispersion of gold (Au) by continuously recycling coarse Au and releasing...of secondary and especially nano-particulate Au. Gold grains were collected from eight arid sites in three...colluvial- and alluvial placers at increasing distances from primary mineralization. Gold grains were studied |
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| Genesis of Placers and Their Different Sources Based on the Morphological Features of Placer Gold Zinaida...Genesis of Placers and Their Different Sources Based on the Morphological Features of Placer Gold. Minerals...on the identified typomorphic features of placer gold, a set of determined morphogenetic criteria is proposed...proposed to identify the genesis of placer gold content and different sources in the platform areas,...efficiency of forecasting ore and placer gold deposits. Gold particles larger than 0.25 mm with signs |
 | Barkov, A. Y., Nixon, G. T., Levson, V. M., Martin, R. F. (2009) A Cryptically Zoned Amalgam (Au1.5-1.9Ag1.1-1.4)ÎŁ2.8-3.0Hg1.0-1.2 from a Placer Deposit in the Tulameen-Similkameen River System, British Columbia, Canada: Nartural or Man-made?. The Canadian Mineralogist, 47 (2) 433-440 doi:10.3749/canmin.47.2.433 | Journal (article/letter/editorial) |
| A PLACER DEPOSIT IN THE TULAMEEN â SIMILKAMEEN RIVER SYSTEM, BRITISH COLUMBIA, CANADA: NATURAL OR MAN-MADE...deposit associated with the Tulameen â Similkameen river system, British Columbia. This amalgam formed at...related to the process of âself-electrorefiningâ. Gold is more ânobleâ than silver, so that ions of Au...dans les grains dâalliage AuâAg trouvĂ©s dans les placers un peu partout dans le monde. (Traduit par la RĂ©daction)...Colombie-Britannique, Canada. Introduction Gold-bearing placers in which Au and Ag are associated with the |
 | Lalomov, Alexander, Grigorieva, Antonina, Kotov, Alexei, Ivanova, Lidiya (2023) Typomorphic Features and Source of Native Gold from the Sykhoi Log Area Placer Deposits, Bodaibo Gold-Bearing District, Siberia, Russia. Minerals, 13 (5) 707 doi:10.3390/min13050707 | Journal (article/letter/editorial) |
| and Source of Native Gold from the Sykhoi Log Area Placer Deposits, Bodaibo Gold-Bearing District, Siberia...ru Abstract: The Bodaibo gold-bearing district in the Lena gold province of Siberia is one of the largest...and oldest placer gold-bearing provinces in the world. Approximately 1650 tons of gold has been extracted...deposits are lacking and still controversial. Native gold from four different locations was gathered to investigate...of disjunctive dislocations near the Sukhoi Log gold deposit were researched. If they coincided with |
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| GeologicalFeaturesof Alluvial Placers I. P. KARTASI-I0V Abstract Alluvial placer depositsmay be divided...Rich "bottom" autochthonous placers accumulateduring many stages of river developmentand are concentrated...get to the bedrock, which is protected from the river action by a layer of a substrative alluvium, but...grains may be concentratedin the higher parts of alluvial strata. During later downcuttingstages,however...enlarge bottom placers. Allochthonousplacers,containing finer heavy mineral grains moved by a river as a part |
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| Z:P&tcard depitdng diggers kxtracting gold ftoh the rock in the Lena River area, Stbefia, ca. 1910. John Taylor...ancient origins of manâs obsession with gold, Russiaâs gold mining industry developed extremely late...heavily mined for gold long before the time of Christ, whereas Russia found no gold until relatively recently...minerals and localities. 156 ROCKS & MINERALS of any gold production at all is startling. This was not for... Every ruler of Russia was interested in fmding gold to back up the monetary system and help finance |
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| Perspectives in reconnaissance for coastal-marine placers on southern and western continental shores of Okhotsk...Perspectives in reconnaissance for coastal-marine placers on southern and western continental shores of Okhotsk... Perspectives in reconnaissance for coastal-marine placers on southern and western continental shores of Okhotsk...nearshore part of the Sea of Okhotsk has determined that gold is the principal component of the possible industrially...subordinate importance. The leading role played by gold is indicated by the character of the region's ore |
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| minerals Article Gems and PlacersâA Genetic Relationship Par Excellence Harald G. Dill Mineralogical...absence of heavy metals), can also appear in some placers and won for a profit (agate, amethyst, citrine...trap-site of gemstones (residual, eluvial, colluvial, alluvial, deltaic, aeolian, and marine shelf deposits)...that matter during accumulation of gemstones in placers are their intrinsic value controlled by the size...accumulation. The present study on gems and gemstone placers is a reference example of fine-tuning the âChessboard |
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| 56 locations consist of 39 lode deposits and 17 placers and contain almost 7.5 million metric tons of tin...distinctly different geologic deposit types: lodes and placers. Figure 3 shows 39 locations of lode deposits and...Rooiberg Zaaiplaats Van Rooi's Vley L _ _ Kuils River of; "' 1 Renison I EXPLANATION Geologic deposit...tin deposits lie in the mid-Tertiary volcanic province of the Sierra Madre Occidental located in central...amenable to normal recovery methods. In the Lost River area Alaska, tin is a potential byproduct of beryllium |
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| XXâXX SCIENTIFIC COMMUNICATIONS PLATINUM-BEARING PLACERS: MINERAL ASSOCIATIONS AND THEIR 190Pt-4He AND Re-Os...platinum-group mineral (PGM) placers of large areal extent in the river basins of Siberia (Vilyui, Lena...isotope dating of PGMs, and applied to Pt-bearing placers of Siberia. Correlations between the 190Pt-4He...show that the potential sources for some of the placers are likely buried Precambrian mafic-ultramafic...paper can be applied to other cratonic areas with alluvial PGMs of unknown origin. Introduction face (Vysotskiy |
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| Hunchunite Anyuiite Novodneprite Pb-Fe-aluminosilicate Gold Alkaline fluid PtâAu placer Inagli Aldan Shield...chemical compositions of Au-Pb compounds and host gold particles, describe morphology and relationships... associated with K-feldspar and anyuiite in the gold grain. The new data together with data from other...(the Anyui River, Russia; Razin and Sidorenko, 1989), (2) hunchunite Au2Pb (the Hunchun River, China; Wu...and (3) novodneprite AuPb3 (the Novodneprovskoe gold deposit, Kazakhstan; Dyusembaeva et al., 2006). |
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| Preliminary Grade and Volume Model of Alluvial Sn-Au Placers by James D. Bliss 1 and W. David Menzie2...placer deposits: Grade and volume model of Sn-Au placers is developed from 63 deposits found worldwide The...3) Gold grades are reported in 15 percent of the deposits There is one chance out often the gold grade...within the United States from 1990 to 1994 was from placers in Alaska; the amount was negligible (Carlin, 1995)...and tonnage model of Sn placers, an important deposit type. Geology Sn placers develop because Sn, commonly |
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| com/loi/tigr20 Problem of intermediate collectors of gold R.M. Fayzullin To cite this article: R.M. Fayzullin...Fayzullin (1968) Problem of intermediate collectors of gold, International Geology Review, 10:12, 1383-1385...At: 07:17 Problem of intermediate collectors of gold R.M. Fayzullin ABSTRACT: Analysis of conglomerates...are typical "interceptors" (transit collectors) of gold, depending on their petrographic composition and...interceptor - alluvial placer, (b) lode interceptor - alluvial placer, c) interceptor - alluvial placer. -- |
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| com/loi/tigr20 Changes in gold during development of fluviatile and marine placers, as in Khualaza area,... southern Maritime Province L.S. Gorshkov , L.A. Nikolayeva & Yu.A. Epshteyn Published online: 10 Sep...Epshteyn (1972) Changes in gold during development of fluviatile and marine placers, as in Khualaza area,... southern Maritime Province, International Geology Review, 14:8, 802-807, DOI: 10.1080/00206817209475764...page/terms-and-conditions Changes in gold during development of fluviatile and marine placers, as in Khualaza area, |
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| Mestorozhdenii, 2012, Vol. 54, No. 6, pp. 557â570. Native Gold and Companion Minerals in the Cenozoic Sediments...Russia Received April 23, 2012 AbstractâClastic gold in the Cenozoic sediments of the Ural Foredeep is...types of alluvial placers, which are formed at a distance of 10â30 km from their sources. The gold grains...ness and high degree of alluvial refining. It is suggested that endogenic gold occurrences in mountainous...clastic gold grains. DOI: 10.1134/S1075701512060074 1 INTRODUCTION The discovery of economic gold and goldâplati |
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| 2011 AbstractâThe geological and genetic model of gold concentration at different stages of weathering...substantiate forecasting and prospecting criteria of gold deposits hosted in linear karst zones of weathering...concentrations of gold. Its eco nomic value is determined not only by placerforming gold, as takes place...placer (Shilo, 2000), but also by fine classes of gold particles unrecoverable with traditional gravity...also a physicochemical approach for estimating bulk gold contents, including all modes of its occurrence |
