Relevant bibliographies by topics / Placer deposits

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  1. Journal articles
  2. Dissertations / Theses
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  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'Placer deposits'

Author: Grafiati
Published: 4 June 2021
Last updated: 31 July 2024

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Journal articles on the topic "Placer deposits"

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Stepanov, V. A. "Reference couple gold deposit — placer as a basis for forecasting of the new gold deposits in Amur river basin." Proceedings of higher educational establishments. Geology and Exploration, no. 6 (January 3, 2019): 49–58. http://dx.doi.org/10.32454/0016-7762-2018-6-49-58.

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About 1400 placers and several dozens of ore gold deposits are known in the Amur gold-bearing province. Placers are to a large degree worked out, so the future of the province is seen to be in the discovery of the new gold deposits. The paper shows the dependence of the productivity and composition of the native gold placers on the size and formational affiliation of the placer-forming gold deposit. The reference couples have been identified: the gold deposit and the placer formed due to the erosion of its' upper part. For example, the Tokur gold-quartz deposit is a channel-fill placer in Tokur stream, gold-sulphide-quartz deposit Pioneer—the placer in Ulungi river, gold-sulphide-quartz deposit Bamskoe—the placer of Chulbangro river, Berezitovoye gold-polymetallic deposit—placer of the Konstantinovsky stream and gold-silver field Pokrovskoye—placer of Sergeevsky stream. A forecast of new gold deposits of a certain formation has been made according to the parameters of the placer and the composition of the native gold. A similar selection of reference couples of a gold deposit and a placer with the subsequent forecasting of new deposits can be one of the methods for predicting gold deposits in the other gold-bearing provinces.
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Pitty, Alistair F. "Placer deposits symposium." Journal of the Geological Society 142, no. 4 (July 1985): 709–10. http://dx.doi.org/10.1144/gsjgs.142.4.0709.

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Kedrova, T. V., I. N. Bogush, N. N. Zinchuk, L. D. Bardukhinov, A. N. Lipashova, and V. P. Saltykova. "Diamond Placers of the Nakyn Kimberlite Field." Russian Geology and Geophysics 63, no. 3 (March 1, 2022): 245–54. http://dx.doi.org/10.2113/rgg20204259.

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Abstract The paper presents the results of studies of diamonds from Early Jurassic sediments making up the Nyurbinskoe buried placer of the Nakyn kimberlite field, unique in diamond reserves. The main task is to identify diamond distribution patterns in the deposits of the Dyakhtar Stratum (lower deposit) and the Ukugut Suite (upper deposit) within the placer. A comparative analysis of the typomorphic features of diamonds from the upper and lower deposits of the placer was carried out. Variations in the contents of crystals with certain properties that form the image of a diamond-bearing geologic object have been revealed. The zonal distribution of diamonds by characteristics in sedimentary deposits, regardless of their age, has been established. The properties of diamonds and their associations change within the placer, which is due to their redeposition during the Early Jurassic sedimentation.
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JAMSRANDORJ, G., and SERGUEI A. DIATCHKOV. "Placer Deposits of Mongolia." SEG Discovery, no. 24 (January 1, 1996): 1–14. http://dx.doi.org/10.5382/segnews.1996-24.fea.

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Editor’s note: Smimov uses the weathering definition of eluvial, meaning “an accumulation of rock debris produced*in-place by decomposition or disintegration of rock; a residue.” Two other terms in Smimov’s classification are not in common usage in North America nor in North American placer classification schemes By Russian definition, diluvium is an accumulation of fragments on the surface of slopes close to the source rock, predominantly moved by gravity. In North America, proluvium is a “complex, friable deltaic sediment accumulated at the fool of a slope as a result of an occasional torrential washing of fragmental material” (Glossary of Geology, 1972, American Geological Institute, Washington, D.C.).
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Pidvysotskyi, V. T., N. M. Ostafychuk, and S. I. Bashinsky. "PLACER DEPOSITS OF DIAMONDS AND THEIR FORMATION CONDITIONS." Geological Journal, no. 1 (March 29, 2023): 17–38. http://dx.doi.org/10.30836/igs.1025-6814.2023.1.273683.

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This article reviews information from published papers and studies by the authors about placer diamond deposits. Original data were obtained in result of field and laboratory-analytical work carried out in various countries of Africa and South America. The main types of placer diamond deposits – fluvial, fluvioglacial, eolian, and man-made – have been considered and characterized. The main attention is given to fluvial continental placers, which are the most diverse, well-studied and have the greatest industrial importance. Primary, secondary and mixed deposits are distinguished according to the method of feeding; short, moderate and long transport deposits – according to the distance of the diamond-bearing material movement. It is noted that although the short transport placers (deluvial-proluvial and beds of short watercourses) have not industrial value, they are very informative for the searching for root sources. It is important to reliably diagnose these deposits by lithological-facies and mineralogical features during prospecting works. The concepts about the conditions for the formation of diamond placers in various landscape and geological conditions are developed and clarified. Alluvial-proluvial-lacustrine and proluvial-lacustrine types of placers studied in Yakutia and Brazil are characterized in detail. Their characteristic feature is that their productive strata, being re-deposited products of crustal weathering, themselves underwent a hypergenic change at the place of occurrence, which significantly masks the primary conditions of formation. Continental alluvial redeposition and long transport placers, as well as marine, yield the most high-quality expensive diamonds, the average value of which can reach $300–400 per carat. Often, such placers are formed due to the erosion of ancient Proterozoic placers, which belong to the category of fossils. The article summarizes the genetic and morphological types of diamond placers in the form of a principle diagram of the distribution of sedimentary reservoirs of kimberlite minerals. The landscape-dynamic zones of sedimentation are highlighted. A classification scheme of sedimentary reservoirs containing diamond placers has been developed. Continental, transitional and marine environments are distinguished, with further detalization of sedimentation environments – peneplain, alluvial-lacustrine accumulative plain, alluvial-deltaic plain and shelf zones of sea basins. It is shown that the formation of valley placers, their internal structure, thickness, granulometric composition and diamond content of alluvium are influenced by the dynamic phases of the formation of annual valleys. Visualization of the mutual relationship of different morpho-genetic types of placer diamond deposits is given.
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Melchiorre, Erik B., Ryan Mathur, George Kamenov, and Jorge Paredes. "Geochemical Overprinting and Secondary Placer Crystal Formation in the La Cholla District, Quartzsite, Arizona, USA: Evidence from Copper Isotopes, Morphology, and Trace Elements." Minerals 13, no. 11 (November 15, 2023): 1444. http://dx.doi.org/10.3390/min13111444.

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Geochemical overprinting on placer gold deposits produces complex deposits with apparently paradoxical geochemical and morphological attributes. The La Cholla placer gold deposits near Quartzsite, Arizona, USA, contain sharp and often undamaged gold crystals within high-energy gravels as a result of postdepositional recrystallization by localized hot springs. Geothermal fluids emanated from a basin-bounding fault and left a distinct signature that includes recrystallized gold with low Pb and δ65Cu > 1.14‰, secondary uraninite and carnotite, travertine deposits, and mounds of highly silicified placer gravels. Surrounding these deposits are placer gravels with angular gold morphology and geochemistry indicative of flash-flood pulse placers with a lode gold source < 5 km and gold particles with low Pb and δ65Cu < 0.77‰. The multitude of small local lode gold source veins is likely related to specialized fluid migration along mid-Tertiary detachment faults. The unroofing of these veins at 5 to 17 Ma by high-angle Basin and Range faulting led to extensive placer development, with subsequent localized modification by geothermal fluid migration along the same faults. This study documents geochemical overprinting and modification of placer deposits and bears upon the study of other placers containing crystalline gold and uranium mineralization. Similar deposits may document past geothermal activity and identify structural fluid conduits and steep paleo-topographic gradients.
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Syafrizal, AYA Hakim, and A. Sulastri. "Geochemical Distribution of REE and Grain Size Analysis of Heavy Mineral Associated with Tin Placer-Type Deposit, Bangka." IOP Conference Series: Earth and Environmental Science 1031, no. 1 (May 1, 2022): 012008. http://dx.doi.org/10.1088/1755-1315/1031/1/012008.

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Abstract Indonesia is included in the East Malaya Block of the Southeast Asian Tin Belt. Two types of tin deposits in Indonesia are primary and secondary tin deposits (placer). Factors that can cause the formation of placer tin deposits include S-type granite, weathering, transportation, and sedimentation. Factors that control the formation of placer tin deposits include the presence of source rock (granite type S), weathering processes, erosion, transportation and sedimentation, and the presence of basins or valleys where weathering materials are deposited. The transportation process has a major role in the grain shape of a material. This study aims to determine the geochemical distribution and characteristics of heavy mineral grains at the accumulation of placer tin deposits, e.g., colluvial, alluvial, and tailings, in which there are 62 sample points located Bangka Island, Indonesia. The research method used in this study was grain size analysis, radiation level measurement using a scintillometer, and geochemical analysis using ICP-MS.
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Alenichev, V. M., and M. V. Alenichev. "Enhancing geopotential of placer deposits." MINING INFORMATIONAL AND ANALYTICAL BULLETIN 8 (2018): 16–25. http://dx.doi.org/10.25018/0236-1493-2018-8-0-16-25.

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Nahan, Gusfrimanuel, Satria Bijaksana, Putu Billy Suryanata, and Khalil Ibrahim. "GEOCHEMICAL AND MAGNETIC CHARACTERISTICS OF PLACER GOLD DEPOSITS FROM CENTRAL KALIMANTAN, INDONESIA." Rudarsko-geološko-naftni zbornik 38, no. 2 (2023): 99–107. http://dx.doi.org/10.17794/rgn.2023.2.7.

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Massive tailings have resulted from the extensive use of placer deposits in Central Kalimantan, Indonesia, by artisanal and small-scale gold mining (ASGM) activities. Recently, the placer deposits and their tailings have been exploited for heavy minerals. In this study, geochemical and magnetic analyses were carried out on these deposits to identify the prospect of REE (rare earth element) exploration in the materials already collected by ASGM activities. Samples were collected from ten different locations. For each location, two different fractions were prepared for analyses, i.e. the heavy mineral (HM) fraction and the panned (M60) fraction. All HM and M60 samples were subjected to magnetic susceptibility measurements, but only representative samples were subjected to x-ray fluorescence (XRF) measurements (for Si, Ti, Fe, Zr, and Al) and to inductively coupled plasma-emission spectroscopy (ICP-OES) measurements (for Eu, Tb, Dy, and Sc). The results showed that the concentrations of major elements (Ti, Fe, Zr, and Al) vary significantly from deposits along one river to another, while the concentration of Si is rather similar. Compared to M60 samples, the HM samples have higher concentrations of Ti, Fe, Zr, Al, and Sc, implying that the sluice-box separation enhances the concentration of valuable minerals. Magnetic susceptibility is found to be correlated with Fe and Sc concentrations, confirming the potential use of magnetic measurements as a complementary tool for Fe and Sc exploitation in placer deposits. It is believed that both the source rocks and the sedimentary settings of these deposits determine whether certain elements (Sc, Fe, and Zr) are present or absent in Central Kalimantan placer deposits. The prospect of exploring and exploiting Sc in these placer deposits might augment the ASGM activities in Central Kalimantan.
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Tampubolon, Armin. "The Indonesian Titanium Deposit Types and Their Resources: The Aspects For Titanium Commodity Development." Buletin Sumber Daya Geologi 8, no. 3 (November 8, 2013): 100–109. http://dx.doi.org/10.47599/bsdg.v8i3.85.

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Indonesia has several Titanium deposit types: beach placer, alluvial and lateritic types. The source of Titanium minerals in beach placer is derived from Tertiary Volcanic Rocks.Theoccurence of alluvial Titanium deposit is closely associated with cassiterite (tin minerals) alluvial in Bangka-Belitung Islands. The source of Titanium minerals (ilmenite) are derived fromweathering on tin mineralization hosted in metamorphic and granitic rocks within uplifted morphology areas. Lateritic Titanium deposits are formed by lateritization process in association with bauxite and nickel in Riau, Kalimantan and Sulawesi Islands. The sources of Titanium are in granitic and metamorphic basement rocks.Java beach placer resources are quite big in tonnage, nearly 50 million tons in total, with significant TiO contents ranging from 8.91 % to 3.17 %. Beach placer along the south shoreline of Java seems to indicate consistency in their mineralogical and genetic types with relativelyhomogenous in TiO contents. Sumatra shows significant resources for lateritic Titanium deposit that is up to 107,800,859 tons with 0.5% to 15 % TiO . The quite interesting resources are indicated by very significant TiO average (15%) with the total of 19,243,757 tons of lateritic deposit type in Bintan Island, Riau,Sumatra. The total resources of beach placer type deposits in Sumatra are much lower than lateritic ones.Sulawesi has both beach placer and lateritic types where the interesting resources of this island are indicated by quite big resources and significant values in TiO grades in North Sulawesi; the tonnage is up to 31,400,000 tons with TiO content average is 9.85 %. On the basis of resources and processing technologies, beach placer deposits in Sumatera, Java and Sulawesi are thought to have potentially economic significance. However, such available resources are needed to upgrade by performing detailed and systematic exploration.Government policies and environment concerns are important aspects for consideration in Titanium commodity development of this country.
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Dissertations / Theses on the topic "Placer deposits"

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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 the formation and location of surficial gold placers is then used to guide exploration and target potential deposits, which can then be evaluated.
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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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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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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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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 Group basin. The tectonic subsidence curve generated for the Witwatersrand Basin clearly implies foreland basin response which was superimposed an older, deep seated extensional basin. These compressive tectonics can be superimposed on extensional basins, where the shift from extensional to compressional tectonics lead to inversion processes. The critical issues about the Witwatersrand basin which were addresed in this review, is the validity of basin wide correlation of placer unconformuties and whether sequence stratigraphy is applicable to fluvial systems of the Witwatersrand sequence. It is believed that the Central Rand Group was deposited as alluvial - fan deltas by fluvially dominated, braidplain systems with minor marine interaction which had a considerable impact on the preservation of economically viable placers. Most important to the exploration geologist is the recognition of stacking patterns of the fluvial strata to determine change in the rate at which accommodation was created. Identifying sequence boundaries and other relevant surfaces important for identifying these stacking patterns of the sequences, depends entirely on the recognition of a hierarchy of stratal units including beds, bedsets, parasequences, parasequence sets and the surfaces bounding sequences. Placers are closely associated with the development of disconformities and therefore become important to recognise in fluvial strata. If these placers are to become economic, the duration of subaerial exposure of the unconformities that allowed the placers to become reworked and concentrated must be determined. In order to preserve the placer, a sudden marine transgression is necessary to allow for minimal shoreline reworking and to cap the placer to prevent it from being dispersed. The placers in the Witwatersrand basin occur in four major gold-bearing placer zones in the Central Rand Group. Accordingly they can be assigned to four supercycles, which are cyclical and therefore predictive. It is the predictive nature of these rocks and the ability of sequence stratigraphy to enhance this aspect, which is a pre-requisite for an effective exploration tool in the search for new ore bodies or their extension in the Witwatersrand basin.
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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 and the northwardtapering, angular, poorly sorted basal vein-quartz lag indicates a northward palaeo-flow direction. Less than 1% total heavy minerals (THM) is found in the matrix of these gravel units and the heavy mineral suite is distinguished by zircon, pseudorutile and kyanite. The channel clay unit is dominated by an upper, mediumgrained quartzose sand and kaolin clay facies, which shows advanced post-depositional weathering. The fluvial unit is correlated with the channel clay unit of Hondeklip Bay and a Cretaceous age is proposed for the initial channel incision. The two shallow marine successions have been correlated with the Late Miocene, Early Pleistocene, +30m and +50m packages respectively. These marine sediments were first described by John Pether (1994) in the Hondeklip Bay area and were named according to their transgressive maxima. They are transgressive successions arranged en echelon down the coastal bedrock gradient, from oldest and highest to youngest. The offshore environment of the +50m package consists of fine silty sand, which is moderately sorted. The mineral assemblage is dominated by quartz and the average THM is 18%. The inshore environment is distinguished by a single poorly sorted basal cobble lag which shows an overall fining upward succession. The beachface environment is composed of medium to fine-grained sand, which is moderate to well-sorted. Mineral diversity is greatest in the inshore and beachface environments and the average THM for these two units is greater than 35%. The +30m package has been extensively eroded due to its lower erosion and outcrops were sporadic along the coast. The +30m offshore sediments are recognised by fine sediments with high concentrations of glauconite and organic matter. The inshore environment is distinguished by numerous poorly sorted pebble lags with fining upward successions. Both the inshore and beachface units have higher feldspar concentrations than the corresponding +50m units. The average THM for these two units is less than 3%. The aeolianite unit, which comprises several distinct units, extends over the entire length of the study area and is characterized by calcrete and red bed horizons. Colour variations in the otherwise homogeneous unit are due to heavy mineral enrichment and/or different degrees of in situ weathering and cementation. The unit is composed exclusively of fine- to medium-grained sand and the THM concentration averages 9%. This unit is composed of more than one generation of aeolian sand and forms part of an aeolian transport corridor which transported sand from the beach to the interior. The oldest unit has been equated with the Upper Miocene Prospect Hill Formation, whereas the more recent yellow dune sand is equated with the Pleistocene Springfontyn Formation. At Geelwal Karoo, only the heavy sand placer in the +50m package was deemed to be of any economic significance. The average THM of this placer was calculated to be 40% and some 150 thousand tons of Tibearing material can be expected from this succession. This relatively small volume of heavy minerals and extensive cementation however, make this placer a less attractive prospect than the neighbouring Namakwa Sands operation.
AFRIKAANSE OPSOMMING: Die plaas Geelwal Karoo is ongeveer 16km noord van die Olifantsriviermond aan die Weskus van Suid- Afrika geleë en het voorkomste van fluviale, marine en eoliese afsettings van post-Gondwana ouderdom. Die oudste eenheid, ‘n basale fluviale eenheid, oorlê Proterosoiëse en Paleosoiëse plaaslike vloer gesteentes wat op hulle beurt weer bedek word deur eoliese en littorale eenhede verteenwoordigene ven twee transgressiewe siklusse. Die fluviale kanaalklei-opeenvolging, afgeset in vlak ingesnyde rotsbedding-kanale, is wigvormig en is afgeset parallel aan die huidige kuslyn in ‘n alluviale waaier-afsetting. Die vloeirigting was langs die kus en die noorwaards toespitsende, hoekige, swak gesorteerde basale aar-kwarts bodemgruis dui op ‘n noordwaards palaeo-vloeirigting. Minder as 1% totale swaarminerale (TSM) is gevind in die tussenmassa van hierdie gruis-eenhede en die swaarmineraal reeks word onderskei deur sirkoon, pseudo-rutiel en kianiet. Die kanaalklei eenheid word oorheers deur ‘n boonste, medium-korrelrige kwarts-bevattende sand en kaolien kleifasies was dui op gevorderde verwering na afsetting. Die fluviale eenheid word gekorreleer met die kleikanaal en ‘n Kryt-ouderdom word voorgestel vir die aanvanklike insnyding van die kanaal. Die twee vlak marine opeenvolgings word gekorreleer met die Laat Mioseen, vroeg Pleistoseen, naamlik die +30m en +50m eenhede onderskeidelik. Die aflandige omgewing van die +50m eenhied bestaan uit matiggesorteerde, fyn slikkerige sand. Die mineraalversameling word oorheers deur kwarts en die gemiddelde TSM is 18%. Die subgetysone word onderskei deur ‘n enkele swak-gesorteerde gruislaag en is oorwegende opwaarts fynerwordend. Die strandomgewing is goed verteenwordige en bestaan uit matig tot goedgesorteerde medium- tot fynkorrelrige sand. Die grootste mineraal-diversiteit kom voor in die subgety- en strandomgewings en die gemiddelde TSM vir hierdie eenhede is hoër as 35%. As gevolg van algemene erosie kom die +30m eenheid sporadies voor. Die aflandige omgeving is herken deur fyn kleierige of slikkerige sedimente met hoe konsentrasies gloukoniet en organiese materiaal. Die subgetysone omgewing is gekenmerk deur verskeie gruislae wat almal opwaarts fynwordend is. Altwee die subgety- en strandomgewings het hoer feldspar konsentrasies as die +50m eenhede. Die gemiddelde THM vir hierdie enhede is minder as 3%. Die eolitiese eenheid, bestaan uit verskeie duidelik-onderskeibare eenhede, beslaan die totale lengte van die studiegebied en word kenmerk deur uitgebreide kalkreet en rooi-laag horisonne. Kleurverskille in die andersins homogene eenheid kan verklaar word in terme van lae swaarmineraal konsentrasies en/of as gevolg wan verskillende grade van in situ verwering en sementering. Die eenheid bestaan uitsluitlik uit fyntot medium-korrelrige sand en het ‘n gemiddelde TSM konsentrasie van 9%. Die eenheid bestaan uit meer as een generasie eoliese sand en maak deel uit van ‘n eoliese vervoersisteem wat sand vanaf die strand na die binneland vervoer het. Die oudste sande in hierdie eenheid is gekorreleer met die Laat Mioseen Prospect Hill Formasie terwyl die meer onlangse geelduin sand vergelyk word met die Pleistoseen Springbokfontein Formasie. By Geelwal Karoo is slegs die +50m eenhede beskou as economies van belang. Die gemiddelde TSM van hierdie swaarmineraal-ertsligaam is bereken op 40% met ‘n verwagte 150 duisend ton Ti-draende material van die opeenvolging. Die relatiewe klein volume swaarminerale en uitgebreide sementering het tot gevolg dat dit ‘n minder aanloklike proposisie is as die aanliggende Namakwa Sands aanleg.
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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 of the evolution marine placer deposits. The poly-cyclic role of coastal aeolian, alluvial, and marine processes, in marine placer enrichment is shown to be particularly important in considered target identification and prioritisation. A detailed bathymetric, sonographic and seismic interpretation, is an integral part of diamond placer exploration, and was used to examine and describe surficial and sub-bottom characteristics within the study area. Marine placers are formed along palaeo-strandlines during periods of marine transgression and regression and are therefore fundamental in marine placer exploration. A detailed bathymetry map, compiled for this study, of the area between Lüderitz Bay and Clara Hill, provides the foundation for a detailed terrace level investigation. Regionally, twelve well-developed stillstand levels are identified, nine of which fall into the study area. These interpretations are compared with global eustatic as well as terrace and resource/reserve levels in the Lüderitz area and are found to correlate well. Sediment dynamic studies involve the use of accredited application software for wave refraction modelling, to determine the wave angle and orbital wave velocity at the seabed. Bedload velocities, required to move diamonds of specific sizes, can be empirically determined and therefore areas of diamond entrainment and deposition can be modelled and target features delineated and prioritised. These detailed interpretations provide a sound platform for evaluating diamond placer process models in the study area. By integrating both previously published and newly formulated ideas, a revised, holistic model for the formation of marine diamond placer deposits in central Namibian is postulated. The proposed model is tested by comparing it to the lateral distribution of presently defined resource/reserve areas in the Lüderitz area and shows a close correlation with most of these enriched deposits. Based on this model, a matrix for the delineation and prioritisation of marine placer deposits is developed and the best target features within the study area are identified.
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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 in this study suggest that trace element analysis could be useful for characterising gold sources on the southern Seward Peninsula. Major and minor element geochemical profiling is sufficient at differentiating between sites from regional provenance systems but insufficient at differentiating between sites within a single system. Differentiating among sites within a single system will likely require microchemical analysis of mineral inclusions and analysis of trace element signatures.
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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 of comments on specific deposits and a recent preliminary survey, however, Anglo-Saxon placed deposits have remained largely unstudied. This thesis represents the first systematic attempt to identify, characterize, analyse and interpret placed deposits in early to middle Anglo-Saxon settlements (5th–9th centuries). It begins by disentangling the various definitions of ‘placed’, ‘structured’, and ‘special’ deposits and their associated assumptions. Using formation process theory as a basis, it develops a definition of placed deposits as material that has been specially selected, treated, and/or arranged, in contrast with material from similar or surrounding contexts. This definition was applied to develop contextually specific criteria for identifying placed deposits in Anglo-Saxon settlements. Examination of 141 settlements identified a total of 151 placed deposits from 67 settlements. These placed deposits were characterized and analysed for patterns in terms of material composition, context type, location within the settlement, and timing of deposition relative to the use-life of their contexts. Broader geographical and chronological trends have also been considered. In discussing these patterns, anthropological theories of action, agency, practice, and ritualization have been employed in order to begin to understand the roles placed deposits may have had in structuring space and time and expressing social identities in Anglo-Saxon settlements, and to consider how placed deposition may have articulated with Anglo-Saxon worldview and belief systems.
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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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Books on the topic "Placer deposits"

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1936-, Yeend Warren E., Shawe Daniel R. 1925-, and Wier Kenneth L. 1914-, eds. Gold in placer deposits. Washington, DC: Dept. of the Interior, 1990.

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Lampright, Richard L. Gold placer deposits near Anchorage, Alaska. 2nd ed. Nederland, Colo: Iron Fire Publications, 1997.

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J, Nokleberg Warren, ed. Significant metalliferous lode deposits and placer districts of Alaska. Washington: U.S. G.P.O., 1987.

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D, Izbekov Ė. Sistema korennoĭ istochnik: Rossypʹ. I͡A︡kutsk: I͡A︡kutskiĭ nauchnyĭ t͡s︡entr SO RAN, 1995.

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Shilo, N. A. Uchenie o rossypi͡akh: Teorii͡a rossypeobrazui͡ushchikh rudnykh format͡siĭ i rossypeĭ. 2nd ed. Vladivostok: Dalʹnauka, 2002.

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D, Morrison Paul, ed. Placer gold deposits of the Sierra Nevada. Baldwin Park, CA: Gem Guides Book Co., 1997.

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Hiller, John. New England placer gold. 2nd ed. Naugatuck, Conn: J. Hiller, 1992.

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Silva, Michael A. Placer gold recovery methods. Sacramento: Division of Mines and Geology, 1986.

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Akimov, L. V. Geologo-geomorfologicheskie osnovy poiskov i prognozirovanii͡a rossypeĭ na Urale. Syktyvkar: Komi nauchnyĭ t͡sentr Uro AN SSSR, 1988.

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National Seminar on Development Planning of Coastal Placer Minerals (2005 Manonmanium Sundaranar University). National Seminar on Development Planning of Coastal Placer Minerals: PLACER--2005. Edited by Loveson V. J. 1962-, Chandrasekar N, Sinha A, Man̲ōn̲maṇiyam Cuntaran̲ār Palkalaikkal̲akam, and Central Mining Research Institute (Dhanbad, India). New Delhi: Allied Publishers, 2005.

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Book chapters on the topic "Placer deposits"

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Kudrass, Hermann. "Placer Deposits." In Encyclopedia of Marine Geosciences, 1–2. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-6644-0_31-1.

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Komar, Paul D. "Placer Deposits." In Encyclopedia of Earth Sciences Series, 1378–79. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-93806-6_246.

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Komar, Paul D. "Placer Deposits." In Encyclopedia of Earth Sciences Series, 1–3. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-48657-4_246-2.

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Roonwal, Ganpat Singh. "Placer Deposits." In The Indian Ocean: Exploitable Mineral and Petroleum Resources, 51–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-95501-3_4.

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Merlin, Mark D., Patrick D. Nunn, John C. Kraft, Donald L. Forbes, Ian Shennan, E. Robert Thieler, Cheryl J. Hapke, et al. "Placer Deposits." In Encyclopedia of Coastal Science, 771–72. Dordrecht: Springer Netherlands, 2005. http://dx.doi.org/10.1007/1-4020-3880-1_246.

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Semeihan, Tankhain, and Uyanga Bold. "Placer Gold Deposits." In Modern Approaches in Solid Earth Sciences, 103–28. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5943-3_4.

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Minter, W. E. L. "Ancient placer gold deposits." In Gold metallogeny and exploration, 283–308. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4613-0497-5_9.

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Minter, W. E. L. "Ancient placer gold deposits." In Gold Metallogeny and Exploration, 283–308. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2128-6_9.

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Yannopoulos, J. C. "Treatment of Placer Deposits." In The Extractive Metallurgy of Gold, 25–53. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-8425-0_3.

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Spellman, Frank R. "Placer Rare Earth Elements Deposits." In The Science of Rare Earth Elements, 153–61. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003350811-9.

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Conference papers on the topic "Placer deposits"

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Van Gosen, Bradley S., and Debashish Sengupta. "PLACER-TYPE RARE EARTH ELEMENT DEPOSITS." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-279551.

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Remezova, O. O., D. P. Khrushchov, S. P. Vasylenko, and O. V. Yaremenko. "Innovative approaches to information modeling of placer deposits." In Geoinformatics. European Association of Geoscientists & Engineers, 2021. http://dx.doi.org/10.3997/2214-4609.20215521100.

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Fedorova, L. L., K. O. Sokolov, D. V. Savvin, V. N. Fedorov, and G. A. Kulyandin. "GPR modeling of placer deposits geological profiles of permafrost zone." In 15th International Conference on Ground-Penetrating Radar (GPR) 2014. IEEE, 2014. http://dx.doi.org/10.1109/icgpr.2014.6970432.

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Grosz, A. E., J. C. Hathaway, and E. C. Escowitz. "Placer Deposits Of Heavy Minerals In Atlantic Continental Shelf Sediments." In Offshore Technology Conference. Offshore Technology Conference, 1986. http://dx.doi.org/10.4043/5198-ms.

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Pruss, Yuriy. "INNOVATIVE�HIGH-TECH�DEVELOPMENT�OF�POST-MINING�PLACER�DEPOSITS�(NORTHEASTERN�RUSSIA)." In SGEM2012 12th International Multidisciplinary Scientific GeoConference and EXPO. Stef92 Technology, 2012. http://dx.doi.org/10.5593/sgem2012/s03.v1029.

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Васянин, Г. М. "Legal peculiarities of development of placer technogenic deposits of precious metals." In III Международная научно-практическая конференция «Инновационное развитие современной науки: новые подходы и актуальные исследования». Crossref, 2024. http://dx.doi.org/10.26118/5584.2024.92.48.029.

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Beddage, BCD, MUA Ijas, WATN Wijayalath, AVP Vijitha, and HMR Premasiri. "GPR mapping as a method for placer mineral exploration: A case study in Akurala, Sri Lanka." In International Symposium on Earth Resources Management & Environment. Department of Earth Resources Engineering, University of Moratuwa, Sri Lanka, 2022. http://dx.doi.org/10.31705/iserme.2022.8.

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Placer mineral exploration includes mapping underlying strata extensively. There are numerous exploration techniques, including electric and gamma logging, shallow vertical drill holes, exploratory trenches, and pits. Due to limitations of these conventional methods, geophysical methods such as Ground Penetrating Radar (GPR), are widely being used. The purpose of this study is to map placer deposits using GPR as an exploratory approach. GPR is a modern, rapid, no-contact, high-resolution technique which transmit, reflect and receipt of high frequency electromagnetic (radar) wave. This study was carried out at Akurala, Galle, Southern Sri Lanka using 300MHz antenna. Based on the GPR data, sand layers were identified in clay beds, of an old riverbed, and the sand layer is deposited as a fluvial deposit, which are the sediments deposited by paleo river channel. Average thickness of the sand bed could be interpreted as 0.94m, extending perpendicular to shoreline, and situated at approximately 1.25m depth below surface level. GPR data profile indicate that the sand layer may enrich with valuable minerals and heavy minerals, and it was validated using thin sections prepared from test pit sampling.
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Sikder, Arif M., Nazrul I. Khandaker, Stanley Schleifer, Xin-Chen Liu, Carlos E. Castano Londono, Krishna Mahabir, and Zarine Ali. "GEOCHEMICAL FINGERPRINTING OF BEACH PLACER DEPOSITS, MONTAUK POINT, LONG ISLAND, NEW YORK." In 66th Annual GSA Southeastern Section Meeting - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017se-290553.

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Laverov, Nikolay. "DIGITAL MODELING OF HEAVY MINERAL PLACER DEPOSITS FOR FORECASTING OF THEIR ECONOMIC PROSPECTS." In 17th International Multidisciplinary Scientific GeoConference SGEM2017. Stef92 Technology, 2017. http://dx.doi.org/10.5593/sgem2017/21/s08.110.

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Bochkaryov, Yuri Semenovich, and Alexander Mikhailovich Ishkov. "THE OPERATIONAL RELIABILITY OF QUARRY DUMP TRUCKS BELAZ-7540 IN THE PLACER DEPOSITS." In 20th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2020. STEF92 Technology, 2020. http://dx.doi.org/10.5593/sgem2020/1.2/s03.042.

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Reports on the topic "Placer deposits"

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Morison, S. R. Placer Deposits in Canada [Chapter 11: Quaternary Resources in Canada]. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1989. http://dx.doi.org/10.4095/131682.

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Shilts, W. W., and S. L. Smith. Stratigraphy of Placer Gold Deposits: Overburden Drilling in Chaudiere Valley, Quebec. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/120442.

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McLemore, Virginia T., John Asafo-Akowuah, and Alanna Robison. Mineral resource assessment of heavy mineral, beach-placer sandstone deposits at Apache Mesa, Jicarilla Apache reservation, Rio Arriba county, New Mexico. New Mexico Bureau of Geology and Mineral Resources, 2016. http://dx.doi.org/10.58799/ofr-587.

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O'Keeffe, Michael, Marieke Dechesne, Matthew L. Morgan, Stephen M. Keller, Katharina Pfaff, Asha A. Mahatma, and Alexander Peretyatko. RS-48 Beach Placer Mineral Deposits along Localized Paleoshorelines of the Western Interior Seaway, Upper Cretaceous Fox Hills Sandstone, Eastern Denver Basin, Colorado. Colorado Geological Survey, March 2021. http://dx.doi.org/10.58783/cgs.rs48.kzgr9849.

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Pack, David. PR-616-17607-R01 Sulfur Condensation in Pressure Reduction Equipment. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), August 2019. http://dx.doi.org/10.55274/r0011615.

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In natural gas transmission pipelines systems, there is a growing awareness of contamination due to the presence of sulfur vapor in the gas stream at sub ppm levels. Particularly at pressure reduction facilities, the sulfur vapor can desublimate out as solid elemental sulfur and then combine with other particle matter and trace liquids in the gas stream to form the observed contamination deposits. In order to better control the formation of the elemental sulfur, an improved understanding of the contribution that the design of pressure regulators make to this desublimation process is required. This research program has come to the challenge of this requirement. In the conducted program, two pressure regulators were tested at a common facility that was known to have an elemental sulfur deposition problem. Each pressure regulator was alternatively placed in service so as each was subjected to, as near as possible, identical operating conditions. A requirement for the selection of the two pressure regulators was that they had to have different internal design features. The quality of the natural gas supply was regularly sampled and analyzed, with the contamination deposits on the pressure regulator internals sampled and analyzed at the termination of the test period. These deposits were analyzed for both hydrocarbon and other liquid deposits as well as a range of metal and semi-metal compounds captured in the deposits.
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Bundtzen, T. K. Prospect examination of a gold-tungsten placer deposit at Alder Creek, Vinasale Mountain area, western Alaska. Alaska Division of Geological & Geophysical Surveys, 1986. http://dx.doi.org/10.14509/1190.

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Anderson, Zachary W., Greg N. McDonald, Elizabeth A. Balgord, and W. Adolph Yonkee. Interim Geologic Map of the Browns Hole Quadrangle, Weber and Cache Counties, Utah. Utah Geological Survey, December 2023. http://dx.doi.org/10.34191/ofr-760.

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The Browns Hole quadrangle is in Weber and Cache Counties of northern Utah and covers the eastern part of Ogden Valley, a rapidly developing area of the Wasatch Range. The Middle and South Forks of the Ogden River bisect the quadrangle and are important watersheds and recreational areas to the communities of Ogden Valley and the Wasatch Front. The towns of Huntsville and Eden are just west of the quadrangle, unincorporated communities with year-round residents are present throughout the quadrangle, and numerous summer-cabin communities are present in the eastern part of the quadrangle. A portion of Powder Mountain ski resort, which draws year-round visitation and recreation, is present in the northwest corner of the quadrangle. The quadrangle contains the Willard thrust, a major thrust fault with approximately 30 mi (50 km) of eastward displacement that was active during the Cretaceous-Eocene Sevier orogeny (Yonkee and others, 2019). In the quadrangle, the Willard thrust places Neoproterozoic through Ordovician strata in the hanging wall over a fault-bounded lozenge of Cambrian strata and footwall Jurassic and Triassic strata (see cross section on Plate 2). Neoproterozoic strata comprise a succession of mostly clastic rocks deposited during rifting of western North America and breakup of the supercontinent Rodinia (Yonkee and others, 2014). These rocks include the Cryogenian-age Perry Canyon and Maple Canyon Formations, and the Ediacaran-age Kelley Canyon Formation, Papoose Creek Formation, Caddy Canyon Quartzite, Inkom Formation, Mutual Formation, and Browns Hole Formation. The Browns Hole Formation is a sequence of interbedded volcaniclastic rock and basalt lava flows that provides the only radiometric age control in the quadrangle. Provow and others (2021) reported a ~610 Ma detrital apatite U-Pb age from volcaniclastic sandstone at the base of the formation, Crittenden and Wallace (1973) reported a 580 ± 14 Ma K-Ar hornblende age for a volcanic clast, and Verdel (2009) reported a 609 ± 25 Ma U-Pb apatite age for a basalt flow near the top of the formation. Cambrian strata in the hanging wall include a thick basal clastic sequence (Geertsen Canyon Quartzite) overlain by a thick sequence of interbedded limestone, shale, and dolomite (Langston, Ute, and Blacksmith Formations). Hanging wall rocks are deformed by Willard thrust-related structures, including the Browns Hole anticline, Maple Canyon thrust, and numerous smaller folds and minor faults. Footwall rocks of the Willard thrust include highly deformed Cambrian strata within a fault-bounded lozenge exposed in the southern part of the quadrangle, and Jurassic and Triassic rocks exposed just south of the quadrangle. The Paleocene-Eocene Wasatch Formation unconformably overlies older rocks and was deposited over considerable paleotopography developed during late stages of the Sevier orogeny. The southwest part of the quadrangle is cut by a southwest-dipping normal fault system that bounds the east side of Ogden Valley. This fault is interpreted to have experienced an early phase of slip during local late Eocene to Oligocene collapse of the Sevier belt and deposition of volcanic and volcaniclastic rocks (Norwood Tuff) exposed west of the quadrangle (Sorensen and Crittenden, 1979), and a younger phase of slip during Neogene Basin and Range extension (Zoback, 1983). Lacustrine deposits and shorelines of Pleistocene-age Lake Bonneville are present in the southwest corner of the quadrangle near the mouth of the South Fork of the Ogden River and record the highstand of Lake Bonneville (Oviatt, 2015). Pleistocene glacial deposits, present in the northwest corner of the map, are likely related to the Pinedale glaciation, commonly expressed by two moraine building episodes in the Wasatch Range (Quirk and others, 2020). Numerous incised alluvial deposits and geomorphic surfaces are present along major drainages and record pre- and post-Lake Bonneville aggradational and degradational alluvial and colluvial sequences. Mass-movement deposits, including historically active landslides, are present throughout the quadrangle. Crittenden (1972) mapped the Browns Hole quadrangle at 1:24,000 scale, which provided an excellent foundation for the general stratigraphy and structure, but the 1972 map lacked important details of unconsolidated surficial units. As part of 1:62,500 scale mapping of the Ogden 30'x60' quadrangle, Coogan and King (2016) updated stratigraphic nomenclature, revised some contacts, and added more details for surficial units. For this map, we utilized new techniques for data acquisition and analysis to delineate surficial deposits, bedrock contacts, and faults more accurately and precisely. Mapping and field data collection were largely done in 2021–2022 using a combination of GPS-enabled tablets equipped with georectified aerial imagery (U.S. Department of Agriculture [USDA] National Agriculture Imagery Program [NAIP], 2009), orthoimagery (Utah Geospatial Resource Center [UGRC] State Geographic Information Database, 2018b, 2018c; 2021a, 2021b), and lidar data (UGRC State Geographic Information Database, 2006; 2011; 2013–2014; 2018a), previously published geologic maps, topographic maps, and applications for digital attitude collection. We also used hand-held GPS units, Brunton compasses, and field notebooks to collect geologic data. Field data were transferred to a Geographic Information System (GIS), where the map was compiled and completed.
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Chriscoe, Mackenzie, Rowan Lockwood, Justin Tweet, and Vincent Santucci. Colonial National Historical Park: Paleontological resource inventory (public version). National Park Service, February 2022. http://dx.doi.org/10.36967/nrr-2291851.

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Colonial National Historical Park (COLO) in eastern Virginia was established for its historical significance, but significant paleontological resources are also found within its boundaries. The bluffs around Yorktown are composed of sedimentary rocks and deposits of the Yorktown Formation, a marine unit deposited approximately 4.9 to 2.8 million years ago. When the Yorktown Formation was being deposited, the shallow seas were populated by many species of invertebrates, vertebrates, and micro-organisms which have left body fossils and trace fossils behind. Corals, bryozoans, bivalves, gastropods, scaphopods, worms, crabs, ostracodes, echinoids, sharks, bony fishes, whales, and others were abundant. People have long known about the fossils of the Yorktown area. Beginning in the British colonial era, fossiliferous deposits were used to make lime and construct roads, while more consolidated intervals furnished building stone. Large shells were used as plates and dippers. Collection of specimens for study began in the late 17th century, before they were even recognized as fossils. The oldest image of a fossil from North America is of a typical Yorktown Formation shell now known as Chesapecten jeffersonius, probably collected from the Yorktown area and very likely from within what is now COLO. Fossil shells were observed by participants of the 1781 siege of Yorktown, and the landmark known as “Cornwallis Cave” is carved into rock made of shell fragments. Scientific description of Yorktown Formation fossils began in the early 19th century. At least 25 fossil species have been named from specimens known to have been discovered within COLO boundaries, and at least another 96 have been named from specimens potentially discovered within COLO, but with insufficient locality information to be certain. At least a dozen external repositories and probably many more have fossils collected from lands now within COLO, but again limited locality information makes it difficult to be sure. This paleontological resource inventory is the first of its kind for Colonial National Historical Park (COLO). Although COLO fossils have been studied as part of the Northeast Coastal Barrier Network (NCBN; Tweet et al. 2014) and, to a lesser extent, as part of a thematic inventory of caves (Santucci et al. 2001), the park had not received a comprehensive paleontological inventory before this report. This inventory allows for a deeper understanding of the park’s paleontological resources and compiles information from historical papers as well as recently completed field work. In summer 2020, researchers went into the field and collected eight bulk samples from three different localities within COLO. These samples will be added to COLO’s museum collections, making their overall collection more robust. In the future, these samples may be used for educational purposes, both for the general public and for employees of the park.
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Pagliacci, Carolina, and Ana María Chirinos-Leañez. Credit Supply in Venezuela: A Non-Conventional Bank Lending Channel? Inter-American Development Bank, April 2017. http://dx.doi.org/10.18235/0011796.

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This paper evaluates whether fiscal and foreign exchange policy shocks canexplain both credit and credit supply in Venezuela. Empirical evidence suggests that between 65 and 90 percent of credit growth is linked to the buildup of banks' deposits caused by the monetary effects of fiscal expansions. For these cases, since credit is provided at equal or reduced interest rates, credit supply takes place. Loan supply can occur either endogenously, when fiscal domestic spending increases with expansionary aggregate supply shocks, or exogenously, when fiscal policy shocks emerge. The role of exogenous fiscal shocks in accounting for credit supply is preponderant in the long run. This evidence suggests fiscal shocks represent a non-conventional bank lending channel. Because this exogenous fiscally-triggered credit supply does not significantly contribute to boosting real activity, its major cost might be associated with high credit volatility.
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Løvschal, Mette, and Havananda Ombashi. Palynological Sampling in Western Jutland 2021-22: Anthea Work Package #2. Det Kgl. Bibliotek, 2023. http://dx.doi.org/10.7146/aulsps-e.478.

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A palynological sampling programme was carried out in three areas of Western Jutland in 2021-22. Our goal was to collect new sediment samples from archaeological excavations and peat deposits to reconstruct patterns in past heathland use and development. The location of the case areas was determined by the potential of the sites for combination with existing palynological data (Solsø Hede) and/or archaeological data (the Vejen area). At Solsø Hede, a pollen core was obtained near Solsø. At Vejen, two separate sediment collections took place. To the north of Vejen, in Gammelby Mose, peat sediments were collected. To the south of Vejen, at Kongehøj, 15 samples were collected from a Bronze Age house floor plan. The sampling programme formed part of the research project called ANTHEA (Løvschal 2021), which focuses on the deep history of anthropogenic heathlands. The project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement no. 853356).
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