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Dissertations / Theses on the topic 'Placer deposits'

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1

Mann, P. L. "Surficial placer gold deposits." Thesis, Rhodes University, 1994. http://hdl.handle.net/10962/d1018245.

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This review summarises the factors which control the formation and distribution of surficial gold placer deposits. Regional tectonic and climatic conditions as well as gold source are considered. The characteristics of eluvial, alluvial, marine, glacial and fluvioglacial gold placer deposits are described. Particular attention is paid to the gold grains within these placers. These gold grains have a distinctive morphology and chemical composition which reflect the manner in which they were transported, deposited and concentrated within the placers. The knowledge of the processes which lead to
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2

Weston, Leyla Halide. "Sedimentology and stratigraphy of placer gold deposits of Haggart Creek, central Yukon Territory." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0016/MQ48054.pdf.

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3

Bond, Jeffrey David. "Late Cenozoic history of McQuesten map area, Yukon Territory, with applications to placer gold research." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq21154.pdf.

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4

De, Bever Johannes Nicolaas. "An overview of the early-proterozoic, auriferous Black Reef placer in the Transvaal Basin." Thesis, Rhodes University, 1997. http://hdl.handle.net/10962/d1005596.

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5

Van, Eeden Johan. "Basin analysis and sequence stratigraphy a review, with a short account of its applicability and utility for the exploration of auriferous placers in the Witwatersrand Basin." Thesis, Rhodes University, 1996. http://hdl.handle.net/10962/d1005546.

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The Witwatersrand basin is unique in terms of its mineral wealth. The gold in the Witwatersrand basin is mainly concentrated in the placers and two types of unconformities are associated with the placer formation. This paper attempts to quantitatively describe the origin and depositional process of placers within the context of basin analysis, geohistory and sequences stratigraphic framework. Several tectonic models have been proposed for the evolution of the Witwater~rand basin and it seems as if a cratonic foreland basin accounts for many of the observed features observed the Central Rand Gr
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6

Elferink, Lisa. "The cenozoic stratigraphy and associated heavy mineral palaeo-placer deposit on Geelwal Karoo : West Coast, South Africa." Thesis, Stellenbosch : Stellenbosch University, 2005. http://hdl.handle.net/10019.1/21452.

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ENGLISH ABSTRACT: The farm Geelwal Karoo is situated some 16km north of the Olifants River mouth on the West Coast of South Africa and hosts fluvial, marine and aeolian deposits of post-Gondwana age. The oldest basal fluvial succession, unconformably overlies Proterozoic and Palaeozoic basement rocks and is in turn capped by aeolianite and littoral packages representing two transgressive cycles. The fluvial channel clay succession is deposited in shallow bedrock-incised channels, has a wedge-shape and is deposited parallel to the present coastline. The flow direction is along the coast an
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7

Rau, Grant. "A geological evaluation of marine diamond placer deposits on the central Namibian inner shelf : a case study of the Hottentot Bay area." Thesis, Rhodes University, 2004. http://hdl.handle.net/10962/d1007554.

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This study focusses on the marine diamond placers within Exclusive Prospecting Licence 1950 and Mining Licence 103a, located northwest of the north-facing Hottentot Bay which is 60 km north of Lüderitz, along the central Namibian coastline. The thesis follows the natural geological evolution of the marine placer deposit from primary source, through alluvial and/or glacial transportation, concentration along the coastline by wave, aeolian and alluvial/sheet-wash processes and finally marine diamond placer preservation. All of these processes are reviewed as they are important in understanding o
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8

Gauntlett, Ernest John Herbert. "A geochemical and morphological investigation of placer gold grains from the southern Seward Peninsula, Alaska : implications for source and transport mechanisms." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1018202.

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[Partial abstract]: This study presents the first detailed geochemical and morphological characterisation of gold grains from the southern Seward Peninsula, Alaska, a region with significant historical and on-going placer gold mining. Quantitative Au, Ag, Hg, and Cu data are presented for gold grains from eleven sites. Additionally, quantitative Te, W, As, and Sb trace element data are presented for gold grains from ten of the eleven sites. Although it is acknowledged that quantitative trace element analysis of gold grains is a relatively new endeavour, the limited trace element data obtained
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9

Sofield, Clifford M. "Placed deposits in early and middle Anglo-Saxon rural settlements." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:b878e1cd-21a3-449a-8a18-d1ad8d728a26.

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Placed deposits have received increasing attention over the past 30 years, particularly in prehistoric British archaeology. Although disagreement still exists over the definition, identification, and interpretation of placed deposits, significant advances have been made in theoretical and methodological approaches to placed deposits, as researchers have gradually moved away from relatively crude ‘ritual’ interpretations toward more nuanced considerations of how placed deposits may have related to daily lives, social networks, and settlement structure, as well as worldview. With the exception o
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10

Smith, Kelly C. "Source and occurrence of placer gold in central Ross County, Ohio." Connect to this title online, 1992. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1100622082.

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11

Lener, Edward F. "Mineral Chemistry of Heavy Minerals in the Old Hickory Deposit, Sussex and Dinwiddie Counties, Virginia." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/35803.

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The Old Hickory is the largest of a series of Pliocene (?) age heavy mineral sand deposits in Virginia and North Carolina. The high density of heavy minerals allows for selective concentration during transport and deposition. Under the right conditions, placers of considerable size can be formed. The elliptically shaped ore body of the Old Hickory Deposit extends in a North - South direction and is approximately 13 km (8 miles) long and up to 2.5 km (1.5 miles) wide, with an average thickness of 6.5 m (20 feet). The deposit lies along the Fall Zone, where a thin wedge of Cenozoic Coastal P
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12

Fan, Mengyuan. "EFFECTIVENESS OF PRE-RINSE DURING IN-PLACE CLEANING OF STAINLESS STEEL PIPE LINES." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1398696323.

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13

Pedroso, Enrico Campos. "A utilização de imagens JERSI/SAR e LANDSAT na caracterização espacial dos depositos do tipo "placer" da provincia mineral de Tapajos." [s.n.], 1998. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287498.

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Orientadores: Alvaro Penteado Crosta, Carlos Roberto Souza Filho<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Geociencias<br>Made available in DSpace on 2018-07-23T16:51:13Z (GMT). No. of bitstreams: 1 Pedroso_EnricoCampos_M.pdf: 16933120 bytes, checksum: 7918ebfdabea7851e56024cfbc779447 (MD5) Previous issue date: 1998<br>Resumo: Nas regiões tropicais onde há freqüente cobertura de nuvens ou condições atmosféricas adversas, a aquisição de produtos de sensoriamento remoto no espectro ótico é muitas vezes dificultada. Por outro lado, os sistemas de radar são sens
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14

O'Brien, Neil Patrick Matthew. "The geology and genesis of the Ceratteppe volcanogenic Cu-Au-Ag deposit and its place in the geological development of the Artvin Volcanic complex, Artvin, northeastern Turkey." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0005/NQ38322.pdf.

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15

Dennerlein, Katrin. "Narratologie des Raumes." Berlin : de Gruyter, 2009. http://deposit.d-nb.de/cgi-bin/dokserv?id=3360217&prov=M&dok_var=1&dok_ext=htm.

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16

Louis, Aurore. "La place du mobilier en verre dans les sépultures gallo-romaines et mérovingiennes du nord de la France : (1er s av. J.-C,- VII s. ap. J.-C) : offrandes et pratiques funéraires." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE2115.

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L’archéologie funéraire s’attèle à comprendre la place qu’occupent les morts dans les sociétés anciennes. Elle passe par la compréhension des rituels entourant le défunt. Ces usages se reflètent dans les modes de traitement du défunt, dans la structuration de la sépulture et dans le dépôt de mobiliers funéraire. Les rituels, fondés sur la religion romaine, sont en usage dans toutes les provinces de l’Empire et sont adoptés par l’ensemble des peuples sous domination romaine. Les rituels funéraires modèlent ainsi des assemblages de mobiliers, des assemblages de vaisselle, issus de contextes clos
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17

Arling, Viktoria Susanne. "Entwicklung und Validierung eines Verfahrens zur Erfassung von Planungskompetenz in der beruflichen Rehabilitation : der "Tour-Planer" /." Berlin : Logos-Verl, 2006. http://deposit.d-nb.de/cgi-bin/dokserv?id=2900743&prov=M&dok_var=1&dok_ext=htm.

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18

Kumar, Abhineet. "A review of seabed and placer mining deposits in india." Thesis, 2011. http://ethesis.nitrkl.ac.in/2305/1/Abhineet_107MN009.pdf.

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India, gifted with a coastline of over 6000 km, hosts some of the largest and richest shoreline placers. The beach and dune sands in India contain heavy minerals like ilmenite, rutile, garnet, zircon, monazite and sillimanite. A combination of favorable factors like network of drainage, aided by wind and coastal processes like waves and currents, have influenced the formation of the beach and adjoining dune sands. Ilmenite-rich major beach and dune sand deposits occur in the coastal stretches of Kerala (Chavara), Tamil Nadu (Manavala kurichi, Midalam, Vayakallur), Andhra Pradesh, Orissa and
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19

Hugo, Victor Emmanuel. "A study of titanium-bearing oxides in heavy mineral deposits along the East Coast of South Africa." Thesis, 1993. http://hdl.handle.net/10413/5647.

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Heavy mineral deposits along the east coast of South Africa represent the world's largest demonstrated resource of beach placer ilmenite. This mineral occurs as homogeneous, subrounded grains, with chemical compositions close to pure FeTi03• Concentrates contain between 48 and 52 per cent Ti02, with minor impurities of MnO, MgO, and Cr203. Most coastal ilmenites are unaltered or display only incipient alteration, but the entire spectrum of alteration products from ilmenite to rutile or anatase, is observed. Transmission electron microscopy of weathered ilmenites reveals that ilmenite commonly
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20

Pietersen, Kevin John. "Richards Bay zircon." Thesis, 1992. http://hdl.handle.net/10413/6044.

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Zircon from the zircon concentrate of Richards Bay Minerals was investigated with a view to understanding the morphology and provenance. The obsevations were applied to the reduction of uranium, thorium and other trace elements in the heavy mineral placer deposits. It is evident from differences in morphology, optical characteristics, cathodoluminescence, inclusion types and trace element analyses that the zircon is derived from numerous parent rocks. Rare earth element modelling reveals several possible parent rocks including rhyolites, granites, syenites, pegmatites and carbonatites. Fission
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21

Zglinicki, Karol. "Charakterystyka geologiczno-złożowa współczesnych osadów przybrzeżnomorskich z Regencji Jayapura (indonezyjska część Nowej Gwinei)." Doctoral thesis, 2016. https://depotuw.ceon.pl/handle/item/1901.

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Wyczerpywanie się światowych zasobów lądowych złóż kopalin jako źródeł surowców mineralnych stwarza potrzebę nowych poszukiwań surowców na obszarach morskich. Perspektywicznym obszarem o wysokim potencjale złożowym jest Azja Południowo – Wschodnia oraz Oceania, w tym Nowa Gwinea. W regionie prowadzone są szerokie badania, w tym z udziałem polskich geologów (Szamałek et al. 2013, 2015a, 2015b). W 2009 roku rozpoczęto projekt prospekcyjno – eksploracyjny na obszarze północnego wybrzeża Nowej Gwinei – w regionie Jayapura. Prace poszukiwawczo – prospekcyjne miały na celu: określenie i wytypowanie
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22

"A utilização de imagens JERSI/SAR e LANDSAT na caracterização espacial dos depositos do tipo "placer" da provincia mineral de Tapajos." Tese, Biblioteca Digital da Unicamp, 1998. http://libdigi.unicamp.br/document/?code=vtls000130189.

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23

Sampaio, Hugo Aluai. "A Idade do Bronze na bacia do Rio Ave (Noroeste de Portugal)." Doctoral thesis, 2014. http://hdl.handle.net/1822/35559.

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Tese de doutoramento em Arqueologia (área de especialização em Arqueologia da Paisagem e do Povoamento)<br>Esta tese tem como principal objetivo aumentar o conhecimento sobre a Idade do Bronze da bacia do rio Ave, no Noroeste de Portugal. Através da articulação sincrónica e diacrónica dos dados nos seus contextos físico e cultural e à luz de novas premissas teóricas estudou-se este período de uma forma holística. Tal visa interpretar o modo como as comunidades se estruturaram no meio onde estavam imersas ou incorporadas e como interagiram com ele. Privilegiando a contextualização dos dado
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