Showing 421 - 440 results of 586 for search '"quartzite"', query time: 0.16s Refine Results
  1. 421

    Assessing the Groundwater Reserves of the Udaipur District, Aravalli Range, India, Using Geospatial Techniques by Megha Shyam, Gowhar Meraj, Shruti Kanga, Sudhanshu, Majid Farooq, Suraj Kumar Singh, Netrananda Sahu, Pankaj Kumar

    Published 2022-02-01
    “…It was observed that the principal aquifer for the availability of groundwater in the studied area is quartzite, phyllite, gneisses, schist, and dolomitic marble, which occur in unconfined to semi-confined zones. …”
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    Article
  2. 422

    Ionization Radiation Shielding Effectiveness of Lead Acetate, Lead Nitrate, and Bismuth Nitrate-Doped Zinc Oxide Nanorods Thin Films: A Comparative Evaluation by Mohamed Abdulsattar Al-Balushi, Naser M. Ahmed, Samer H. Zyoud, Mohammed Khalil Mohammed Ali, Hanan Akhdar, Osamah A. Aldaghri, Khalid Hassan Ibnaouf

    Published 2021-12-01
    “…The X-ray diffractometer (XRD) analyses of both undoped and doped TFs revealed the existence of hexagonal quartzite crystal structures. The composition analysis by energy dispersive (EDX) detected the corrected elemental compositions of the deposited films. …”
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    Article
  3. 423

    Early Mesoproterozoic evolution of midcontinental Laurentia: Defining the geon 14 Baraboo orogeny by L. Gordon Medaris, Jr, Brad S. Singer, Brian R. Jicha, David H. Malone, Joshua J. Schwartz, Esther K. Stewart, Amanda Van Lankvelt, Michael L. Williams, Peter W. Reiners

    Published 2021-09-01
    “…In Baraboo Interval strata, muscovite parallel to slatey cleavage, in hydrothermal veins, in quartzite breccia, and in metamorphosed paleosol yielded 40Ar/39Ar plateau ages of 1493–1465 Ma. …”
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    Article
  4. 424

    What Happens Between Depositional Events, Stays Between Depositional Events: The Significance of Organic Mat Surfaces in the Capture of Ediacara Communities and the Sedimentary Roc... by Mary L. Droser, Scott D. Evans, Lidya G. Tarhan, Rachel L. Surprenant, Ian V. Hughes, Emmy B. Hughes, James G. Gehling

    Published 2022-02-01
    “…The greatest diversity and complexity of organic mat textures occur in the Ediacaran fossil record as exemplified by the Ediacara Member of the Rawnsley Quartzite, which crops out in and around the Flinders Ranges, South Australia. …”
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    Article
  5. 425

    General geology, alteration, and iron deposits in the Palaeoproterozoic Misi region, northern Finland by T. Niiranen, E. Hanski, P. Eilu

    Published 2003-12-01
    “…Sedimentary rocks include arkosites, mica gneisses, dolomitic marbles, quartzites, tuffites, mica schists, calc-silicate rocks and graphite-bearing schists. …”
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    Article
  6. 426

    Influence of Temperature Regimes of Synthetic Iron Smelting on Casting Production Efficiency by Viktor Alekseevich Kukartsev, Alina Igorevna Trunova, Vladislav Viktorovich Kukartsev, Vadim Sergeevich Tynchenko, Sergei Olegovich Kurashkin, Kirill Aleksandrovich Bashmur, Yadviga Aleksandrovna Tynchenko, Roman Borisovich Sergienko, Sergei Vasilievich Tynchenko

    Published 2023-07-01
    “…As a result of the research carried out, a technology for the use of quartzite is proposed. Thereby, the purpose of this work is to establish temperature regimes for the smelting of synthetic pig iron, allowing the use in metal filling up to 70–90% of steel scrap; this leads to a reduction in the cost of purchasing bulk materials (depending on the brand of cast iron) up to 50% and, thus, increases the efficiency of synthetic cast iron smelting and castings production in general. …”
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    Article
  7. 427

    Application of granular materials for void space reduction within packed bed thermal energy storage system filled with macro-encapsulated phase change materials by Khor, Jun Onn, Yang, Lizhong, Akhmetov, Bakytzhan, Leal, Alfredo Bano, Romagnoli, Alessandro

    Published 2022
    “…Thus, four different materials, namely, quartzite pebbles, aluminum particles, alumina particles and micro-encapsulated n-decane are considered as potential granular fillers for packed beds. …”
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    Journal Article
  8. 428

    Stone tools from locality Crkvine in Stubline by Antonović Dragana, Šarić Josip

    Published 2011-01-01
    “…Findings of numerous quartzite, chert and jasper pebbles out of the House 1/2008, 2 metres away from the northeastern angle of the House (pottery group 1), could not be connected with production of chipped and ground stone artifacts. …”
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    Article
  9. 429

    Principles governing the selection of ore regions for gold deposit search by Е. М. Nekrasov

    Published 2022-06-01
    “…The main share of the world’s gold reserves in deeply formed deposits is shown to be concentrated in the Phanerozoic strata of sandy-clayey composition and in the interlayers of easily replaceable carbonate and amphibolite shales developed in the Proterozoic quartzite-phyllite rocks. The reserves of near-surface gold-silver and gold-telluride ores are selectively located in the young Mesozoic-Cenozoic volcanic rocks of basalt-andesite composition, accompanied by dikes, subvolcanic stocks and the pipes of explosive breccias with large-scale gold ore bodies confined to them. …”
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    Article
  10. 430

    Ocorrência de corpos silicosos em horizontes superficiais de solos de diferentes ecossistemas Occurrence of silica bodies in surface horizons of soils in different ecosystems by Liovando Marciano da Costa, Roseilton Fernandes dos Santos, Carlos Ernesto G.R. Schaefer, Maria Souza dos Santos Moreau, Mauricio Santana Moreau

    Published 2010-06-01
    “…The variation in form and abundance was highest in the soil formed from quartzite. No differences in abundance of phytoliths were observed in the Oxisols from the Cerrado, Mata Atlântica and Caatinga biomes.…”
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    Article
  11. 431

    Surface texture analysis in Toothfrax and MountainsMap® SSFA module: Different software packages, different results? by Calandra, Ivan, Bob, Konstantin, Merceron, Gildas, Blateyron, François, Hildebrandt, Andreas, Schulz-Kornas, Ellen, Souron, Antoine, Winkler, Daniela E.

    Published 2022-12-01
    “…We have performed such a test using Bayesian modelling on three datasets including dental surfaces of sheep (Merceron, Ramdarshan, et al., 2016) and guinea pigs (Winkler, Schulz-Kornas, Kaiser, Cuyper, et al., 2019) from controlled feeding experiments, as well as surfaces of quartzite and flint flakes used in an actualistic archeological experiment on cleaning procedures (Pedergnana, Calandra, Bob, et al., 2020). …”
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    Article
  12. 432

    Sedimentological and Petrographical Characterization of the Cambrian Abbottabad Formation in Kamsar Section, Muzaffarabad Area: Implications for Proto-Tethys Ocean Evolution by Syed Kamran Ali, Rafiq Ahmad Lashari, Ali Ghulam Sahito, George Kontakiotis, Hammad Tariq Janjuhah, Muhammad Saleem Mughal, Ahmer Bilal, Tariq Mehmood, Khawaja Umair Majeed

    Published 2023-02-01
    “…The Abbottabad Formation has been divided into four lithofacies, from bottom to top, namely, thinly interbedded dolomite and shale, cherty-stromatolitic dolomite, oxidized limonitic-brecciated zone, and quartzite, with significant lithological changes. Petrographic studies revealed four types of dolomites: fine crystalline dolomite (Dol. …”
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    Article
  13. 433

    Downstream rounding rate of pebbles in the Himalaya by P. Pokhrel, P. Pokhrel, M. Attal, H. D. Sinclair, S. M. Mudd, M. Naylor

    Published 2024-04-01
    “…Our field data suggest that the roundness coefficient for granite pebbles is 9 times that of quartzite pebbles. Using this model, we reconstruct the transport history of a Pliocene paleo-river deposit preserved at the base of the Kathmandu intermontane basin. …”
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    Article
  14. 434

    Geochemistry and geochronology of the Paleozoic sedimentary rocks in the Shar Khutul area, Central Mongolia by Erdenechimeg D, Oyunchimeg T, Otgonbaatar D, Jitka Míková, Tomurchudur Ch, Dagva-Ochir L, Enkhdalai B, Delgerzaya P, Sharav D, Pavel Hanz L

    Published 2018-12-01
    “…The Upper Silurian to Middle Devonian Erdenetsogt Formation (S3-D2er), which is an oceanic plate stratigraphic unit, is mainly composed of siliceous siltstone, volcanites, tuffs, quartzite, and cherts. The shallow water sediments are divided into Upper Devonian to Lower Carboniferous Tsetserleg Formation (D3-C1cc) and Lower–Middle Carboniferous Dzargalant Formation (C1-2dz). …”
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    Article
  15. 435

    Las Brusquillas 1 (partido de San Cayetano, provincia de Buenos Aires): un nuevo sitio del Holoceno tardío del área Interserrana de la región pampeana Las Brusquillas 1, San Cayeta... by Agustina Massigoge

    Published 2012-11-01
    “…The results from Las Brusquillas 1 show that quartzite was the preferred raw material for the manufacturing of unifacial tools, and that the main animal resource exploited was guanaco (Lama guanicoe), in concurrence with archaeological evidences from other sites of similar chronology located in the Interserrana area. …”
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    Article
  16. 436

    Editorial by Mario Maya

    Published 2020-12-01
    “…The Guaviare Complex is divided into three units according to their textural and compositional characteristics, which are termed the Termales Gneiss, Unilla Amphibolite, which present protoliths that were formed in the Mesoproterozoic at 1.3 Ga, and La Rompida Quartzite, with a maximum age of 1.28 Ga. Martínez et al. describe the base of the Guadalupe Group in the Tunja area, Colombia. …”
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    Article
  17. 437

    Exploration of the X-ray Dark-Field Signal in Mineral Building Materials by Benjamin K. Blykers, Caori Organista, Matias Kagias, Federica Marone, Marco Stampanoni, Matthieu N. Boone, Veerle Cnudde, Jan Aelterman

    Published 2022-10-01
    “…In this manuscript, we apply X-ray dark-field tomography for the first time on four mineral building materials (quartzite, fired clay brick, fired clay roof tile, and carbonated mineral building material), and investigate which information the dark-field signal entails on the sub-resolution space of the sample. …”
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    Article
  18. 438

    Diversity of orchids in Gunung Jerai, Kedah, Malaysia by Auyob, Nur Adilah

    Published 2016
    “…Geologically, the formation involved granites as the core and quartzite covers the outer layer of the mountain. This indicates the establishment of hill heath forest vegetation, mostly on the summit region and lowland dipterocarp forest vegetation at lower region. …”
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    Thesis
  19. 439

    Geochemistry and paleogeographic implications of Permo-Triassic metasedimentary cover from the Tauern Window (Eastern Alps) by G. Franz, M. Kutzschbach, E. J. Berryman, A. Meixner, A. Loges, A. Loges, D. Schultze, D. Schultze

    Published 2021-07-01
    “…The Zentralgneis is partly hydrothermally altered into pyrite quartzite with high Al–S contents, low Na–Sr–Ca–Mg contents, and very strong depletion of the light rare earth elements. …”
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    Article
  20. 440

    Occupational health risk for workers from basic occupational groups employed at copper and zinc ore mining enterprises: Assessment and management by E.R. Shaykhlislamova, L.K. Karimova, N.A. Beigul, N.A. Muldasheva, A.Z. Fagamova, I.V. Shapoval, A.D. Volgareva, E.A. Larionova

    Published 2022-06-01
    “…By now, there have been enough studies on peculiarities of occupational health risks for workers employed at sulfide ore mines, copper-nickel ore mines and ferruginous quartzite mines. Considerably less attention has been given to assessing occupational risks for workers dealing with mining and processing copper-zinc ores. …”
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    Article