 | | Journal (volume) | | 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 ..............New opinion on the origin of the gold from alluvial placers of Romania .................................spectrometer calibration was performed using data for river sediments as reference materials. The statistical... p. 25-28 ASSESSMENT OF METAL CONTAMINATION OF RIVER SEDIMENTS IN CONSERVATION AREAS: CASE STUDY OF CAPARAĂ |  | | Journal (article/letter/editorial) | | minerals Article Gems and PlacersâA Genetic Relationship Par Excellence Harald G. Dill Mineralogical...padparaja, tanzanite, zoisite, topaz, tsavorite, and zircon). Silica and beryl, both light minerals by definition...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 |  | | Journal (article/letter/editorial) | | 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 |  | | 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 |  | | 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...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 |  | | Report (issue) | | 27 Deposits in the drainage basin of the Oconee River, Georgia---------- 27 Alluvium--------------------------...45 Deposits in the drainage basin of the Flint River, Georgia----------- ^7 Alluvium--------------...Deposits in the drainage basin of the Chattahoochee River, Georgia---- 64 Appraisal------------ Alluvium------...97 Eluvial placers------ ----------------------------------------- 100 Alluvial placers in trunk drainage---Summary---...Plate 1. Yadkin River-Dan River area, N. C.-Va.--------------------- 2. Oconee River area, Ga.------- |  | | Journal (article/letter/editorial) | | to the apron and aureole dynamic types of alluvial placers, which are formed at a distance of 10â30 km...characterized by good round ness and high degree of alluvial refining. It is suggested that endogenic gold...discovery of economic gold and goldâplati num placers in the north of the Urals is associated with the...sediments as quite autochthonous marine, marineâalluvial, 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) | | 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 |  | | Journal (article/letter/editorial) | | paper Pegmatitic Nb-Ta oxide minerals in alluvial placers from Limbach, Bratislava Massif, Western Carpathians...of granitic pegmatite origin was found in alluvial placers near Limbach, the Bratislava granitic massif...geological occurrences (for example in elluvial to alluvial deposits), where information about the parental...scription of Nb-Ta oxide mineralization in alluvial placers near Limbach in the Bratislava Granitic Massif...from the heavy-mineral fraction of recent alluvial placers of the Limbach Brook, at SlneÄnĂ© Valley in |  | | Journal (article/letter/editorial) | | hydrothermal quartz veins. Many deposits in the province occur in siliciclastic metasedimentary, or metabasaltic...platinum) province; and the early Neoproterozoic (1 Ga) Kibara rare metal and gold province that is the...application of modern concepts and technologies, this province is drastically underexplored. Keywords: Gold,...felsic intrusions. Geographically, this giant metal province comprises Kivu and Maniema, as well as major portions...Cahen et al., 1984) and as the Kibara Metallogenic Province (Pohl, 1987, 1994), the proper noun being derived |  | | Journal (article/letter/editorial) | | Preliminary classification of coastal-marine placers V.P. Vorob'yev & R.B. Krapivner To cite this article:...(1975) Preliminary classification of coastal-marine placers, International Geology Review, 17:7, 823-829, DOI:...i m i n a r y classification of coastal-marine placers Downloaded by [University of Illinois at Urbana-Champaign]...P. V o r o b yev a n d R Ă The coastal-marine placers have been very unevenly studied. There are extremely...formation of titanium-pyroxene, magnetite, and similar placers, which serve as a source of commercial exploitation |  | | Journal (article/letter/editorial) | | http://www.tandfonline.com/loi/tigr20 Formation of alluvial placers on the shelf of the Sea of Japan A. P. Sivoplyas...article: A. P. Sivoplyas (1980) Formation of alluvial placers on the shelf of the Sea of Japan, International...com/page/termsand-conditions Formation of alluvial placers on the shelf of the Sea of Japan Downloaded...process of sedimentation, and the formation of placers of useful minerals. As a basis for the study, we...the water-current valleys is the preservation of alluvial sediments and "released" useful minerals in a |  | | Journal (article/letter/editorial) | | Yang, Frederik P. Agterberg, and Qiuming Cheng Zircon U-Pb geochronology and geochemistry of copper-bearing...on timing of shearing along the Ailao Shan-Red River shear zone: Implications for genesis of Ailao Shan...orogen, eastern-central China: Constraints from zircon U-Pb and molybdenite Re-Os ages, whole-rock geochemistry...Hongniu-Hongshan copper deposit, Zhongdian area, NW Yunnan Province, Chinaâ Hui-juan Peng, Chang-qing Zhang, Jing-wen...studies of the Shujiadian porphyry Cu deposit, Anhui Province, eastern China: Implications for ore genesisâShiwei |  | | 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 birdsâ songs and the abundant vegetation |  | | 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)...and tonnage model of Sn placers, an important deposit type. Geology Sn placers develop because Sn, commonly...also concentrate in stream bottom gravel as alluvial placers. Some cassiterite can be trapped in bedrock |  | Garnier, V., Ohnenstetter, D., Giuliani, G., Fallick, A. E., Phan Trong, T., HoĂ ng Quang, V., Pham Van, L., Schwarz, D. (2005) Basalt petrology, zircon ages and sapphire genesis from Dak Nong, southern Vietnam. Mineralogical Magazine, 69 (1) 21-38 doi:10.1180/0026461056910233 | Journal (article/letter/editorial) | | 2005, Vol. 69(1), pp. 21±38 Basalt petrology, zircon ages and sapphire genesis from Dak Nong, southern...from eluvial and alluvial placers hosted in basaltic fields of the Dak Lak Province. Two distinct basalt...dating of zircons recovered from the basaltic placers provides evidence of two eruptional events: one...Ăż sapphire, basalt, petrography, geochemistry, zircon, U-Pb dating by SIMS, oxygen isotopes, Vietnam...sometimes rubies are recovered from secondary alluvial and eluvial deposits. Recent * E-mail: virginie_garnier@inrs-ete |  | | Journal (article/letter/editorial) | | Stanaway* Placers deposits are now known from five sedimentary environments; washout, river, aeolian,...processes but one will usually predominate. Denudation placers all sit on or just above erosive scour surfaces...For example, deposits from a waning flood-stage river will include many different size, shape and density...particles but a subsequent lower energy normal river flow might remove only the smaller, flatter or the...denudation placers to achieve high concentrations of particular minerals. Denudation placers have a small |  | | 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 |  | 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...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...(Kamchatka, Russia), and gold grains from the adjacent placers. Identification and investigation of ternary phases |  | | Journal (article/letter/editorial) | | com/loi/tigr20 Formation conditions and structure of placers in Severnaya Sos'va auriferous area B.V. Ryzhov...Ryzhov (1973) Formation conditions and structure of placers in Severnaya Sos'va auriferous area, International...00:03 Formation conditions and structure of placers in Severnaya Sos'va auriferous area Downloaded...B.V. Ryzhov Available information on the gold placers of the Northern Urals is very scanty and fragmentary...in small quantity in a whole series of streams. Placers in this area were listed by Rozhkov (7). In the |  | Gunn, A.G., Dorbor, J.K., Mankelow, J.M., Lusty, P.A.J., Deady, E.A., Shaw, R.A., Goodenough, K.M. (2018) A review of the mineral potential of Liberia. Ore Geology Reviews, 101. 413-431 doi:10.1016/j.oregeorev.2018.07.021 | Journal (article/letter/editorial) | | Putu and Goe Fantro. There is a long history of alluvial diamond production in western and central Liberia...of these are considered to be part of a single province that includes Jurassic age diamondiferous kimberlites...countryâs total workforce. The artisanal mining of alluvial gold and diamonds has also made a modest contribution...include barite, heavy mineral beach sands (rutile, zircon, ilmenite and monazite), phosphate, clays, silica...restricted field areas cannot be well correlated with zircon age systematics across the whole KĂ©nĂ©ma-Man domain |  | | Journal (article/letter/editorial) | | occupies most of the North Vietnam, down to the Ca river fault. With the latter orogeny, considered to be...north of the country, principally along the Red river (fig. 2). The cristaline rocks (migmatites, orthogneisses)...deposit is Qui Xa, near Bao Ha in Hoang Lien Son province in the north of the country, close to the Hanoi...weathering/erosion of the archean (?) BIF occuring along the Red river, between Yen Bay and Lao Cai. The ore results from...mined for the manufacture of batteries. Chromite. Alluvial deposits of chro-mite around Nui Nua ultrabasic |  | | Journal (article/letter/editorial) | | Neoarchean fan-delta deposits, western Superior Province, Canada: Sedimentology and provenance Corey Wendland...Archean Alluvial diamonds Diamond deposits Fan-delta a b s t r a c t Most ïŹuvial diamond placers occur...minor enrichments of heavy minerals formed on the alluvial fan-delta surface but the primary cause of the...Witwatersrand Supergroup. The largest diamond placers are those comprising foreshore, spit and bar complexes...(Bluck et al., 2005). These Plio-Pleistocene marine placers formed in a thick succession of cobble- to pebble-sized |  | | Journal (article/letter/editorial) | | scientific papers on placer geology and position of placers in the system of sedimentogenesis have been published...of knowledge on placer geology and position of placers in the Earthâs sedimentary shell. DOI: 10.1134/S0024490208040044...establishment of the journal LMR, problems of placers as an important and diverse group of sedimentary...appreciable place on its pages. The attention to placers is caused to a considerable extent by the wide...as by constant interest of mining industry in placers as sources of valuable mineral resources, such |  | Sorokin, A.P., Rozhdestvina, V.I., Kuzâminykh, 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 RussiaâChina 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...hypergenesis processes produced multistage gold placers with PGE and rare-metal (RM) minerals in intermontane |
|
