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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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| Selected fluvial monazite deposits in the southeastern United States r William C. Overstreet, Amos M...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------...Other sources of monazite-------------------- ------- _-___--_-- _ 97 Deposits of monazite in bedrock-- |
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| complexes; the pegmatite class which includes the monazite, orthite and titanium, tantalum and niobium oxide...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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| HERZEGOVINA BOTSWANA BRAZIL BRUNEI DARUSSALAM BULGARIA BURKINA FASO BURUNDI CAMBODIA CAMEROON CANADA....................................... 9 4.1.4. Placers .................................................of the mineral monazite, it seems appropriate at least to include information on monazite deposits and...common rare earththorium mineral is phosphate monazite, in which the thorium content can reach up to...the most frequent concentrations of thorium in monazite do not exceed 10%. Other common minerals, however |
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| 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 ß 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 |
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| 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...tourmaline, various sulfide minerals, and, in the Lost River area, Alaska, beryllium minerals (Sainsbury, 1964a)...deposits are mined commercially, on a small scale. Placers derived from the erosion of such veins are mined |
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| Monazite Placers In the Southeastern Atlantic States By jOHN B. IvfERTIE, JR. GEOLOGICAL SURVEY...A4ountain streams need exploration) but the main placers are likely to be in the Coastal Plain UNITED ...Publication Data Mertie, John Beaver, 1888Monazite placers in the southeastern Atlantic States. (Geological...Bibliography: p. Supt. of Docs. no.: I 19.3.1390 1. Monazite-Southern States. 2. Hydraulic mining. I. Title...and uses ____________________________ Sources of monazite _______________________________ Rare earths _________________ |
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| 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 |
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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...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 |
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| 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 Slnečné Valley in |
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| 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 .................................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 CAPARAÓ |
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| 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 |
 | Overstreet, W.C., Assegaff, A.B., Jambi, Mohammed, Hussain, M.A., Selner, G.I., Matzko, J.J. (1985) Reconnaissance geochemical exploration of the plutons of quartz monzonite and granite in the Jabal Lababa and Ar Rayth areas, southern Asir, Kingdom of Saudi Arabia. Open-File Report Vol. 1985 (85-8) US Geological Survey doi:10.3133/ofr858 | Report (issue) |
| analyses of nonmagnetic concentrates containing monazite and(or) xenotime................................deposits of these metals are lacking, and any placers would be small and low in tenor. Small positive...possible modification of local representation of the alluvial sample media by the presence of allochthonous...terrace sand and gravel, and aeolian sand Qaa Alluvial sand, silt, and gravel in intermittently active...cultivation Qea Aeolian sand in active dunes Qaf Alluvial sand, silt, and gravel in floodplains adjacent |
 | Rahman, M. A., Pownceby, M. I., Haque, N., Bruckard, W. J., Zaman, M. N. (2016) Valuable heavy minerals from the Brahmaputra River sands of Northern Bangladesh. Applied Earth Science, 125 (3) 174-188 doi:10.1080/03717453.2015.1115159 | Journal (article/letter/editorial) |
| Valuable heavy minerals from the Brahmaputra River sands of Northern Bangladesh Downloaded by [Universite...samples collected from sand bars of the Brahmaputra River in northern Bangladesh revealed that the HM assemblage...Keywords: Valuable heavy minerals, Brahmaputra river, Bangladesh Introduction Heavy mineral (HM) sands...zircon, ilmenite, magnetite, kyanite, sillimanite, monazite, xenotime, chromite, tourmaline, garnet and staurolite...exception is the Gbangbama District in the southern province of the Republic of Sierra Leone, where rutile |
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| ...... 23 FIGURES 1. Map showing the three monazite belts in the southeastern United States ... 5...(including altered ilmenite), rutile, zircon, monazite f aluminosilicates f and gold) average 71.7 weight...as determined by gamma-ray spectrometry, with monazite and zircon concentrations, suggests that existing...in recent alluvial sediments from streams draining the Cretaceous of the Fall Zone. Monazite and zircon...the presumption that radioactive heavy minerals (monazite and zircon) are concentrated with the nonradioactive |
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| mined in North America since 1885, when placer monazite was produced in the southeast USA. Since the 1960s...evaluated resource. Neogene North American placer monazite resources, both marine and continental, are small...Precambrian conglomerates in the Elliott Lake–Blind River district, Canada, could yield by-product HREE and...Approximately 5000 t of monazite were produced between 1885 and 1917 from the Carolina monazite belt, and REE minerals...minerals were produced in the 1950s from placers in Idaho where dredging operations near the town of |
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| Occurrence Of Monazite GEOLOGICAL SURVEY PROFESSIONAL PAPER 530 The Geologic Occurrence Of Monazite By WILLIAM...of monazite and of the geologic A review controls affecting the amount of thorium in monazite UNITED...________________ - ___ -_-_------Description of monazite __ ---- _____________ -----Discovery, synonymy...Age relations _________________ ----_-_-_--------Monazite localities ___ --- _______ -- ____________ -----_Africa...deposits ______ -- __ --- ____ -_-_--Lacustrine placers ____ -----------------_ Ghana----------------- |
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| of the study of heavy concentrates , Types of placers and the paragenesis of minerals in black sands...that zone of "eluvium-deluvium" [ see "deluvial placers" p. 101 (in some cases alluvium) which has been...Buried mechanical halos. --The overlying rocks are alluvial and have been transported from a distance. The...mining districts, and consequently cassiterite placers may occur in these regions, especially in the vicinity...farm, and also the area between Olenichev and the river Ulan-Khol are most favorable for the discovery of |
 | Kislov, Evgeniy V., Aseeva, Anna V., Vanteev, Vladislav V., Sinyov, Anton Yurievich, Eliseeva, Olga A. (2022) Naryn-Gol Creek Sapphire Placer Deposit, Buryatia, Russia. Minerals, 12 (5) 509 doi:10.3390/min12050509 | Journal (article/letter/editorial) |
| pyrope and chrysolite in alluvial–deluvial, alluvial–proluvial, and alluvial deposits on the slopes of...magmatic deposits. Sapphires are extracted from placers associated with intraplate alkali basalts in Australia...Naryn-Gol Creek at the left tributary of the Darhintuy River in the southern part of the Dzhida volcanic field...Pleistocene alluvial deposits of the I and II terrace above the floodplain and Holocene alluvial, eluvial–diluvial...junction of the Naryn-Gol Creek and the Darhintuy River (Mouth Trench, Figure 3) and further upstream in |
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| ' Monazite in Part of I the Southern Atlantic \t Coastal Plain 2 P GEOLOGICAL SURVEY BULLETIN This...Commission 1042-L CONTRIBUTIONS TO ECONOMIC GEOLOGY MONAZITE IN PART OF THE SOUTHERN ATLANTIC COASTAL PLAIN...Coastal Plain have been sampled and examined for monazite. Most of the samples were collected from the Tuscaloosa...percentages of monazite in heavy minerals, and these percentages were used to calculate pounds of monazite per cubic...of the samples (109) contain 0.25 pound or more monazite per cubic yard; the Tuscaloosa, McBean, and Barnwell |
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| HERZEGOVINA BOTSWANA BRAZIL BRUNEI DARUSSALAM BULGARIA BURKINA FASO BURUNDI CAMBODIA CAMEROON CANADA............................................. 25 MONAZITE IN CHARNOCKITE DYKES ...........................large thorium province, known as the Erlank anomaly (Fig. 1), are represented by the monazite-bearing khondalites...metallogenic province may be that of the Appalachian Belt, south-eastern USA, where monazite occurs in sillimanite-bearing...similarities. Among the minerals rich in HFSE, monazite is particularly resistant to weathering and it |
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| Introduction Numerous gold occurrences, both primary and placers, have been reported from various regions in Ethiopia...all known primary gold deposits, occurrences and placers are located principally within the Megado Belt...nearly 50 tonnes of gold has been produced from placers of the Adola area alone until the end of 1996....MINERALIZATION IN SOUTHERN ETHIOPIA The eluvial-alluvial placers have been commercially the most important...gold deposits and the Kumudu ore occurrence. Gold placers are widespread and occur in the Bedakessa, Shanka |
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| affects its present characteristics as a minera1 province, because of the exposure of the various depth...same manner in which detrital heavy minerals in placers are enclosed in the sediments with which they formed...about 120 Tt Pb, 476 t Au (much of it from gulch placers) and 2.5 Tt Ag, from about 15 ore fields or districts...and contains the principal Soviet porphyry Cu-Mo province estimated to represent some 15 Mt Cu and 200 Tt...and Au mineralization this is a distinct Sn(W) province. 1026 Fig. 28-9. Kounrad "porphyry" Cu-Mo deposit |
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| 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 |
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| current supplier of REEs. Following the discovery of monazite in Indian beach sands in the early 1900s, these...deposit type and include chapters on beach sands, alluvial deposits, carbonatites, peralkaline and alkaline...beach placers is ilmenite, but resources of rutile, garnet, sillimanite, zircon, and monazite are reported...Indian beach placers. A wider variety of heavy minerals are reported from the alluvial placers and include |
