 | | Journal (article/letter/editorial) | | electrons in their outer shells, e.g., copper, silver, gold, lead, bismuth, as well as highly mobile...minerals like smithsonite and calamine, native silver, lead minerals such as anglesite or pyromorphite...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 |  | | Journal (volume) | | IATAN Heavy metals in Vereda’s soil of the Formoso River basin, Buritizeiro, Minas Gerais, Brazil ......... Elena NICA Preliminary data of heavy mineral placers deposits from Petite Cote, Senegal ..............New opinion on the origin of the gold from alluvial placers of Romania .................................electrum and other Ag-minerals, i.e. acanthite, native silver, stephanite, proustite-pyrargyrite, polybasite-pearceite...Ge-bearing mineral containing also sulphur and silver. Semi quantitative chemical compositions of several |  | | Journal (article/letter/editorial) | | Ni-Bearing Pyroxenite–Cortlandite Intrusions and Placers of the Dambuki Ore Cluster, the Amur Region V....characterized by numerous and high-grade gold placers. A few small primary deposits and occurrences of...were formerly considered to be the main source of placers. However, the study of widespread Early Cretaceous...deposits and occurrences also contributed to the placers, but their part was rather small. DOI: 10.1134/S1075701507070197...Amur gold-bearing province is characterized by high-grade and numerous gold placers. Since the end of |  | 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) | | grains from heavy concentrates of the Itchayvayam placers and watercourses draining and ore samples of the...draining and heavy concentrates of the Itchayvayam placers contain substitution structures formed by Pd,Hg-rich...Licensee MDPI, Basel, Switzerland. Native gold with silver impurity is the most abundant Au mineral in nature...of native gold composition for the Itchayvayam placers were received by Sidorov et al. (2009, 2019) [36...malanite (CuPt2 S4 ) was found in the Itchayvayam River. The attempts to obtain a crystal structure for |  | | Report (volume) | | ABSTRACT Lode deposits of tin, and commercial placers derived from them, almost invariably are associated...level during the Pleistocene, am.d productive placers have resulted from a complex interplay of stream...Australia. As a result, many economically important placers lie seaward of present shorelines. Most tin is...tantalum, niobium, tungsten, copper, lead, zinc, silver, arsenic, and antimony; in the future, others may...tantalum, niobium, tungsten, copper, lead, zinc, silver, arsenic, and antimony; in the :future, others |  | Barkov, A. Y., Nixon, G. T., Levson, V. M., Martin, R. F. (2009) A Cryptically Zoned Amalgam (Au1.5-1.9Ag1.1-1.4)Σ2.8-3.0Hg1.0-1.2 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 – SIMILKAMEEN RIVER SYSTEM, BRITISH COLUMBIA, CANADA: NATURAL OR MAN-MADE...deposit associated with the Tulameen – Similkameen river system, British Columbia. This amalgam formed at...“self-electrorefining”. Gold is more “noble” than silver, so that ions of Au probably migrated and were...dans les grains d’alliage Au–Ag trouvés dans les placers un peu partout dans le monde. (Traduit par la Rédaction)...Colombie-Britannique, Canada. Introduction Gold-bearing placers in which Au and Ag are associated with the platinum-group |  | | Journal (article/letter/editorial) | | diggers kxtracting gold ftoh the rock in the Lena River area, Stbefia, ca. 1910. John Taylor postcard. ...melt, and refine metals of any kind, be it gold, silver, or copper, with no limitations of place to search...Miass state-owned placer mine on the Tashkurganka River. On this occasion General Major Anosov reported...for reclaiming gold as a byproduct of smelting silver ore. His method proved to be efficient, and Russia...carried gold and silver. Analyses proved him right, and shortly thereafter gold and silver mined in the Altai |  | | Report (issue) | | 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...deposits (Hosking, 1974)) is typified by the rich tin-silver veins of southern Bolivia. The deposits occur in...abundant sulfosalt and sulfide minerals containing silver, arsenic, bismuth, lead, and zinc. The presence |  | 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) | | Bodaibo gold-bearing district in the Lena gold province of Siberia is one of the largest and oldest placer...be a source of local eluvial–proluvial placers, while placers of large valleys are formed due to low-sulphide...The Bodaibo gold-bearing district of Lena gold province is located in Siberia, in the Irkutsk region of...such as the Sukhoi Log are not direct sources of placers because of the fine size of the gold grains. For...such as the Sukhoi Log are not direct sources of placers because of the fine size of the gold grains. For |  | | Book | | 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 birds’ songs and the abundant vegetation |  | 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) | | well as secondary eluvial-, colluvial- and alluvial placers at increasing distances from primary mineralization...mm in diameter are the most abundant sources of alluvial and eluvial Au, and constitute economically important...Frank.Reith@csiro.au (F. Reith). from soils and placers form by detrital or accretionary processes? (iii)...The occurrence of such Au grains in supergene placers is due to weathering and erosion of host materials...Au grains from related eluvial, colluvial and alluvial settings were selected. 2. Field sites 2.1. Lawlers |  | | Journal (article/letter/editorial) | | Article Criteria for Determining the Genesis of Placers and Their Different Sources Based on the Morphological...Nikiforova, Z. Criteria for Determining the Genesis of Placers and Their Different Sources Based on the Morphological...indicate the formation of autochthonous aeolian placers. Gold particles with signs of windworn processing...of allochthonous placers in Quaternary deposits. Deflationary (autochthonous) placers of native gold can...the search morphogenetic criterion of aeolian placers. The presence of disc-shaped and lamellar gold |  | Sorokin, A.P., Rozhdestvina, V.I., Kuz’minykh, V.M., Zhmodik, S.M., Anoshin, G.N., Mitkin, V.N. (2013) The regularities of formation of noble- and rare-metal mineralization in Cenozoic coaliferous deposits in the southern Far East. Russian Geology and Geophysics, 54 (7) 671-684 doi:10.1016/j.rgg.2013.06.003 | Journal (article/letter/editorial) | | Transbaikalia, Far East, Ukraine, Bashkiria, Bulgaria, United Kingdom, Kazakhstan, Uzbekistan, Tajikis-...series of gold-ore and rare-metal deposits and gold placers of Cretaceous and Cenozoic ages, localized in highly...The Russia–China frontier passes along the Amur River. analogs on the eastern margin of Eurasia. This...coals and Paleogene, Neogene, and Quaternary gold placers on the periphery (Sorokin et al., 2009). The age...gold–quartz, gold–sulfide, gold– rare-metal, gold–silver, and porphyry copper associations (Eirish, 2002) |  | | Report (issue) | | 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...within the United States from 1990 to 1994 was from placers in Alaska; the amount was negligible (Carlin, 1995)... molybdenum production (Climax, Colorado), and silver production (San Antonio mine, Mexico). More than...and tonnage model of Sn placers, an important deposit type. Geology Sn placers develop because Sn, commonly |  | | Journal (article/letter/editorial) | | (the Anyui River, Russia; Razin and Sidorenko, 1989), (2) hunchunite Au2Pb (the Hunchun River, China; Wu...of these compounds reported predominantly from placers (Murzin et al., 1996; Khazov et al., 2010; Sandimirova...Au-Pb compounds are referred from bedrocks, not placers (Nekrasov et al., 1988; Alexandrov and Barannikov...placer deposit in the upper reaches of the Inagli River is located in the central part of the Aldan Shield...placer deposit is hosted by modern alluvial sediments of the Inagli River that drains the area covered mainly |  | | Report (issue) | | Future of Placer Mining in Colorado 26 Geology of Placers 27 Placer Concentration 28 Placer Sources 28 Colorado...31 Eluvial Placers 31 Renee ee Oe Colluvial Placers 31 Alluvial Placers 31 Alluvial Transportation...Transportation 32 Gold Comminution 32 Alluvial Gold Placer Deposition 32 Bedload Gold 32 Skim Bars—Suspension...34 Fan Placers 34 Lakes 34 Glacio-Fluvial Placers and Effects of Glaciation 34 Eolian Placers 36 Marine...Marine Placers 36 Fossil Placers 36 Grades of Placer Deposits 36 Bedrock Prospecting 37 Where to Pan 38 |  | | Journal (article/letter/editorial) | | com/loi/tigr20 Certain problems of auriferous lodes and placers N.A. Shilo To cite this article: N.A. Shilo (1968)...(1968) Certain problems of auriferous lodes and placers, International Geology Review, 10:11, 1241-1246...08:17 Certain problems of auriferous lodes and placers N.A. Shilo ABSTRACT: Origins and positions of...of gold fields and ores, particularly of placers, in the Yana-Kolyma area and elsewhere in the Northeast...fields, of lodes to an extent not less than of placers, in the literature of this decade, are evidence |  | | Journal (article/letter/editorial) | | to the apron and aureole dynamic types of alluvial placers, which are formed at a distance of 10–30 km...characterized by good round ness and high degree of alluvial refining. It is suggested that endogenic gold...discovery of economic gold and gold–plati num placers in the north of the Urals is associated with the...sediments as quite autochthonous marine, marine–alluvial, and lacustrine facies. This implies that sources...the Urals and that prospecting for noble metal placers should be spread over the Ural Foredeep. RESEARCH |  | | Journal (article/letter/editorial) | | XX–XX 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 |  | | Journal (article/letter/editorial) | | fluviatile and marine placers, as in Khualaza area, southern Maritime Province L.S. Gorshkov , L.A. Nikolayeva...fluviatile and marine placers, as in Khualaza area, southern Maritime Province, International Geology...fluviatile and marine placers, as in Khualaza area, southern Maritime Province Downloaded by [North...Khualaza gold-bearing system (southern Maritime Province), where we succeeded in following a whole series...a stock of Danian-Paleocene granodiorite. The placers begin directly at the deposit. The whole area of |  | dos Santos Alves, Kelvin, Barrios Sánchez, Santos, Gómez Barreiro, Juan, Merinero Palomares, Raúl, Compaña Prieto, José Manuel (2020) Morphological and compositional analysis of alluvial gold: The Fresnedoso gold placer (Spain) Ore Geology Reviews, 121. 103489 doi:10.1016/j.oregeorev.2020.103489 | Journal (article/letter/editorial) | | Pre-proofs Morphological and compositional analysis of alluvial gold: The Fresnedoso gold placer (Spain) Kelvin...Prieto, Morphological and compositional analysis of alluvial gold: The Fresnedoso gold placer (Spain), Ore... Morphological and compositional analysis of alluvial gold: The Fresnedoso gold placer (Spain) Kelvin...processes related to mechanical cold-work in the river load-bed during transport. Keywords: Gold placer...Iberian Massif 1. INTRODUCTION Historically alluvial deposits have been important sources of gold worldwide |  | | Journal (article/letter/editorial) | | minerals Article Gems and Placers—A 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 “Chessboard |  | | Report (volume) | | Gulch Area, Granite County, Montana Colluvial Gold Placers Near Miners Gulch, Granite County, Montana Geology...BLASKOWSKI, and JAMES E. ELLIOTI B. Colluvial Gold Placers Near Miners Gulch, Granite County, Montana By JEFFREY...Blaskowski, and james E. Elliott - Colluvial gold placers near Miners Gulch, Granite County, Montana I by...Geomorphology AS Landscape development AS Piedmont alluvial plains AS Flood plain A6 Terrace remnants A6 Hills...deposits Al8 Alluvial placers A18 IV Contents Economic geology-Continued Colluvial placers A18 Terrace |  | | Journal (article/letter/editorial) | | com/loi/tigr20 Role of “old” gold in supplying Quaternary placers of Mariinsk taiga a S.V. Yablokova & B.V. Ryzhov...(1973) Role of “old” gold in supplying Quaternary placers of Mariinsk taiga, International Geology Review... Role of "old" gold in supplying Quaternary placers of Mariinsk taiga Downloaded by [University of...gold of the Quaternary, including Holocene, alluvial placers is "old, that is, it appears in the sphere...Quaternary placers must be considered as extremely old relict formations. In regard to the placers of the |  | Bortnikov, N. S., Lobanov, K. V., Volkov, A. V., Galyamov, A. L., Vikent’ev, I. V., Tarasov, N. N., Distler, V. V., Lalomov, A. V., Aristov, V. V., Murashov, K. Yu., Chizhova, I. A., Chefranov, R. M. (2015) Strategic metal deposits of the Arctic Zone. Geology of Ore Deposits, 57 (6) 433-453 doi:10.1134/s1075701515060021 | Journal (article/letter/editorial) | | mineral resources for the min ing industry in this province. The largest Fe, Au, Cr, PGE, Ni, Cu, V, U, nonferrous...metals, and diamond deposits are localized in this province. The shields are considered to be Arctic tectonic...shield 390–350 Ma, making up the Kola metallogenic province. These are Khibiny apa titebearing urtite and...with the general metalogenic features of the Ural province; however, no large basemetal VHMS, skarn, or...base metal rare metal ferrous radioactive gold placers Largest deposits Ordinary & Small deposits Occurrences |
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