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Relevant bibliographies by topics / Grain size groups of soils

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Academic literature on the topic 'Grain size groups of soils'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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Journal articles on the topic "Grain size groups of soils"

1

Liu, Dawei, Yuanzhi Zhang, Guangliang Zhang, et al. "An Empirical Model to Estimate Abundance of Nanophase Metallic Iron (npFe0) in Lunar Soils." Remote Sensing 12, no. 6 (2020): 1047. http://dx.doi.org/10.3390/rs12061047.

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Lunar soils gradually become mature when they are exposed to a space environment, and nanophase metallic iron (npFe0) generates within them. npFe0 significantly changes the optical properties of lunar soils and affects the interpretation of the remotely sensed data of the lunar surface. In this study, a correlation analysis was conducted between npFe0 abundance and reflectance spectra at short wavelengths for lunar soil samples in four size groups based on their spectral and compositional data, collected by the Lunar Soil Characterization Consortium (LSCC). Results show that 540 nm single scat

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Konechnaya, Olga, Sabine Lüchtrath, Larissa Dsikowitzky та Jan Schwarzbauer. "Optimized microplastic analysis based on size fractionation, density separation and μ-FTIR". Water Science and Technology 81, № 4 (2020): 834–44. http://dx.doi.org/10.2166/wst.2020.173.

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Abstract Microplastic particles have been recognized as global hazardous pollutants in the last few decades pointing to the importance of analyzing and monitoring microplastics, especially in soils and sediments. This study focused on a multi-step approach for microplastic analysis combining grain size fractionation, density separation and identification by μ-FTIR-spectroscopy. Eight widely used polymers (polyethylene (PE), polypropylene (PP), polyvinylchloride (PVC), polystyrol (PS), polyethylenterephthalate (PET), polymethylmethacrylate (PMMA), polyurethane (PU) and polyamide (PA)) were frac

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Dumbrovský, Miroslav, Lucie Larišová, Veronika Sobotková, and Martina Kulihová. "Comparison of Different Texture Analysis for Soil Erodibility Calculations of Loamy and Sandy‑Loam Soils in Moravian Regions." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 67, no. 2 (2019): 383–93. http://dx.doi.org/10.11118/actaun201967020383.

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The subject of this article is a comparison of results of soil texture analysis of loamy and sandy‑loam soils for soil erodibilty calculation using the Casagrande areometric method and results obtained by the laser diffraction method. A comparison was made of 27 samples taken from the Větřkovice locality, and 18 samples taken from the Hustopeče locality. On the basis of laboratory analysis of the soil samples, curves of grain composition were plotted, and the soils were divided into grain‑size groups according to the ratio of individual fractions. For comparison of the results, the soils’ regr

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Mohammed, Athraa Hashim, Asmaa Younus Yahya, and Balqees Abdulwahid Ahmed. "Database for Baghdad Soil Using GIS Techniques." Journal of Engineering 18, no. 12 (2012): 1307–24. http://dx.doi.org/10.31026/j.eng.2012.12.02.

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teen sites Baghdad are made. The sites are divided into two groups, one in Karkh and the other in Rusafa. Assessing the underground conditions can be occurred by drilling vertical holes called exploratory boring into the ground, obtaining soil (disturbed and undisturbed) samples, and testing these samples in a laboratory (civil engineering laboratory /University of Baghdad). From disturbed, the tests involved the grain size analysis and then classified the soil, Atterberg limit, chemical test (organic content, sulphate content, gypsum content and chloride content). From undisturbed samples, th

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Peng, Yu, Xuanming Ding, Yang Xiao, Xin Deng, and Weiting Deng. "Detailed amount of particle breakage in nonuniformly graded sands under one-dimensional compression." Canadian Geotechnical Journal 57, no. 8 (2020): 1239–46. http://dx.doi.org/10.1139/cgj-2019-0283.

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The coexistence of broken and unbroken grains in each size range can disturb the assessment of actual amount of particle breakage. In this study, a series of one-dimensional compression tests were carried out on three kinds of coral sands and a silica sand to clarify the detailed amount of particle breakage for nonuniformly graded sands. Before the compression tests, both coral and silica sand assemblies were divided into different grain-size groups and dyed in different colors, then mixed as nonuniformly graded packings. After the compression, grains of different color in each size range were

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Kilca, Ricardo de Vargas, Fabrício de Araújo Pedron, Gustavo Schwartz, Solon Jonas Longhi, and Gabriel Antônio Deobald. "Soil changes in a subtropical seasonal forest chronosequences in the south of Brazil." Ciência Rural 45, no. 12 (2015): 2174–80. http://dx.doi.org/10.1590/0103-8478cr20150035.

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ABSTRACT: The abandonment of field crops and the vegetation recovery in exhausted soils have been a recently studied subject as a way to assess the forest role on the soil recovering. The aim of this study was assess changes in the chemical(14 variables) and grain size (sand, silt, and clay) soil features in four forests chronosequences grew over abandoned field crops in the edge of the Brazilian Southern plateau, Rio Grande do Sul State. There were selected 25 forests aging from 5 to >100 years old in areas of slopes and highlands where samples of Leptosols and Regosols were collected at 1

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Garcia-Gonzalez, M. T., J. Wierzchos, C. Vizcayno, and R. Rodriguez. "Fine-grained laminated Quaternary sediments in the Ebro Valley (Spain): characteristics and formation." Clay Minerals 31, no. 2 (1996): 173–81. http://dx.doi.org/10.1180/claymin.1996.031.2.03.

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AbstractFine-grained sediments are a major parent material in Ebro Valley soils. During the 1960s, the area was transformed by irrigation and soils underwent serious degradation processes. The sediments have a fine texture, high CaCO3 contents and high salinity-sodicity levels, and contain illite as the most important phyllosilicate in the fine fractions. Two groups of finely laminated organization have been recognized in terms of layer thickness and grain-size distribution. Based on texture, the microstructure of the silty and clayey layers is different, irrespective of their mode of formatio

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Du, Jun, Zhiming Xiong, Xinggang Shen, and Chenchen Li. "Experimental Study on the Effect of Coarse Grain Content on the Dilatancy and Particle Breakage Characteristics of Coarse-Grained Soils." Geofluids 2023 (April 25, 2023): 1–17. http://dx.doi.org/10.1155/2023/2307881.

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The dilatancy deformation and particle breakage effects of coarse-grained soil have a significant influence on the safety and stability of high earth and rock-fill dams. To study the shear deformation and particle breakage characteristics of coarse-grained soil, four groups of soil sample with different coarse grain contents were to conduct consolidated drained triaxial compression tests by DJSZ-150 large-scale triaxial compression test machine. The results showed that the volume of coarse-grained soil changes significantly under deviation stress. The soil samples underwent positive dilatancy

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Papazotos, P., O. Chalkiadaki, E. A. Chatzistamatiou, et al. "HEAVY METALS IN URBAN PARK SOILS FROM ATHENS, GREECE." Bulletin of the Geological Society of Greece 50, no. 4 (2017): 2251. http://dx.doi.org/10.12681/bgsg.14281.

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Urban geochemistry is a scientific discipline which is growing in the recent years mainly because of the environmental impact caused by urbanization. The present study aims to determine the concentrations of potentially harmful elements (PHEs) on surface soils (0-10cm) in Athens parks. Soil sampling was carried out in public park areas within the Athens urban area. Twenty surface soil (0-10cm) samples were collected and the <100μm grain size fraction was analyzed by Flame Atomic Absorption Spectroscopy for Pb, Zn, Ni, Cu, Mn andCr after a strong acid dissolution and partial extraction by 1M

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Simard, R. R., N. Ziadi, M. C. Nolin, and A. N. Cambouris. "Prediction of Nitrogen Responses of Corn by Soil Nitrogen Mineralization Indicators." Scientific World JOURNAL 1 (2001): 135–41. http://dx.doi.org/10.1100/tsw.2001.329.

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Soil nitrogen mineralization potential (Nmin) has to be spatially quantified to enable farmers to vary N fertilizer rates, optimize crop yields, and minimize N transfer from soils to the environment. The study objectives were to assess the spatial variability in soil Nminpotential based on clay and organic matter (OM) contents and the impact of grouping soils using these criteria on corn grain (Zea mays L.) yield, N uptake response curves to N fertilizer, and soil residual N. Four indicators were used: OM content and three equations involving OM and clay content. The study was conducted on a 1

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Dissertations / Theses on the topic "Grain size groups of soils"

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Onur, Emine Mercan. "PREDICTING THE PERMEABILITY OF SANDY SOILS FROM GRAIN SIZE DISTRIBUTIONS." Kent State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=kent1389550812.

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Smith, David A. "Effect of particle shape on grain size, hydraulic, and transport characteristics of calcareous sand." Thesis, University of Hawaii at Manoa, 2003. http://proquest.umi.com/pqdweb?index=0&did=764803691&SrchMode=1&sid=2&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1233275673&clientId=23440.

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Ehlmann, B. L., K. S. Edgett, B. Sutter, et al. "Chemistry, mineralogy, and grain properties at Namib and High dunes, Bagnold dune field, Gale crater, Mars: A synthesis of Curiosity rover observations." AMER GEOPHYSICAL UNION, 2017. http://hdl.handle.net/10150/626565.

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The Mars Science Laboratory Curiosity rover performed coordinated measurements to examine the textures and compositions of aeolian sands in the active Bagnold dune field. The Bagnold sands are rounded to subrounded, very fine to medium sized (similar to 45-500m) with 6 distinct grain colors. In contrast to sands examined by Curiosity in a dust-covered, inactive bedform called Rocknest and soils at other landing sites, Bagnold sands are darker, less red, better sorted, have fewer silt-sized or smaller grains, and show no evidence for cohesion. Nevertheless, Bagnold mineralogy and Rocknest miner

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Acaba, Joseph Michael. "Primary Sediment Production from Granitic Rocks in Southeastern Arizona." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/231212.

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Isolated granitic rock bodies (granites, granodiorites, quartz monzonites) in the vicinity of Benson in southeastern Arizona were studied to trace the behavior of rock weathering. Thin sections of fresh granites were examined to characterize the original mineralogy which consisted mainly of quartz, feldspars, and micas. The weathering products show up on the granites as grus and soil profiles as well as down slope in the basin deposits. X -ray diffraction studies of the < 2 micrometers fraction of the weathering products proved illite, smectite, illite-smectite mixed layer, and kaolinite to be

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Kouakou, N'guessan Moïse. "Comportement mécanique des sols grossiers hétérogènes à matrice." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0043.

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Les sols grossiers à matrice, matériaux contenant des grains allant du micromètre à plusieurs dizaines de centimètres, sont fréquemment utilisés dans divers projets géotechniques tels que les digues et les remblais. La détermination de la résistance au cisaillement de ces sols dans les appareils standards de laboratoire est difficile en raison de la présence des grains de grande taille. Différentes approches (écrêtement, substitution et granulométrie parallèle) pourraient être utilisées pour réduire la taille des grains de l'échantillon à tester. Toutefois, ces techniques impliquent une modifi

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Shih, Ping-Ken, and 石秉根. "Influence of Grain Size on Liquefaction-related Behavior of Saturated Granular Soils." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/82749451428393618402.

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碩士<br>朝陽科技大學<br>營建工程系碩士班<br>90<br>Since Taiwan is located in the major Pacific seismic zone, it is noticed that earthquake occurs very frequently and is the major natural hazard in the region. One of the causes of severe damages to the structures during major earthquakes is the development of liquefaction in saturated sand deposits. When a saturated sand deposit is subjected to ground vibrations, it tends to compact and decrease in volume; if drainage is inadequate, the tendency to decrease in volume results in an increase in pore water pressure. When pore water pressure built up is equal to o

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Foster, J. "Development of a Terra Rossa soil profile on marbles of the Cambrian Normanville Group at Delamere, South Australia." Thesis, 2003. http://hdl.handle.net/2440/123594.

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This item is only available electronically.<br>The genesis of Terra Rossa soils is still a matter of controversy. The two leading theories are: (1) that the soil is derived from the insoluble residue of the underlying limestone; or, (2) that contributions from some outside source account for large portions of the soil. Through morphological, analytical and mineralogical studies of a Terra Rossa soil profile at Delamere, South Australia, the insoluble residue of the underlying dolomite and a texture contrast profile from upslope, the major contributors to the soil’s development were determine

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Books on the topic "Grain size groups of soils"

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Graf, John C. Lunar soils grain size. National Aeronautics and Space Administration, Office ofManagement, Scientific and Technical Information Division, 1993.

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United States. National Aeronautics and Space Administration. Program, ed. Lunar soils grain size catalog. National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1993.

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United States. National Aeronautics and Space Administration, ed. Determination of hydrogen abundance in selected lunar soils: Final technical report for grant no. NAG 9-222, June 1-October 31, 1987. National Aeronautics and Space Administration, 1987.

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United States. National Aeronautics and Space Administration., ed. Determination of hydrogen abundance in selected lunar soils: Final technical report for grant no. NAG 9-222, June 1-October 31, 1987. National Aeronautics and Space Administration, 1987.

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Sneider, Christopher Anthony. Prediction of maximum density for coarse grain soils containing gravel size particles. 1991.

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Ott, Fredericka S. Amphipod sediment bioassays: Effect of grain size, cadmium, methodology, and variations in animal sensitivity on interpretation of experimental data. 1986.

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Toulmin, Camilla. Cattle, Women, and Wells. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198853046.001.0001.

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This book describes the choices open to farming families in the Sahelian village of Kala, in central Mali. Life in this drought-prone region is harsh and full of risk to health, crops, and livestock, yet there are also opportunities open to the hard-working, audacious and lucky, bringing considerable returns if the timing is right. Three inter-related themes underlie the analysis of production and investment decisions faced by households; the role of risk, the long timeframe within which decisions are made, and the close links between economic performance and household size and organisation. C

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Book chapters on the topic "Grain size groups of soils"

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Lutenegger, Alan J. "Grain-Size Distribution." In Laboratory Manual for Geotechnical Characterization of Fine-Grained Soils. CRC Press, 2022. http://dx.doi.org/10.1201/9781003263289-5.

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Leong, Eng-Choon, and Martin Wijaya. "Grain-size distribution, and specific gravity." In Laboratory Tests for Unsaturated Soils. CRC Press, 2023. http://dx.doi.org/10.1201/b22304-4.

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Buurman, P., and J. D. J. van Doesburg. "Laser-diffraction grain-size analyses of reference profiles." In Soils of Volcanic Regions in Europe. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-48711-1_33.

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Mir, Bashir Ahmed. "Particle or Grain Size Distribution of Soils by Sieve Analysis." In Manual of Geotechnical Laboratory Soil Testing. CRC Press, 2021. http://dx.doi.org/10.1201/9781003200260-4.

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Yang, J., and L. M. Wei. "Static Liquefaction of Granular Soils: The Role of Grain Shape and Size." In Springer Series in Geomechanics and Geoengineering. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-13506-9_29.

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Maltman, Alex. "Sediments and Sedimentary Rocks." In Vineyards, Rocks, and Soils. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190863289.003.0010.

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We are on more familiar ground in this chapter, looking at processes and materials found in the world all around us. Even the names of sedimentary rocks are well known—sandstone, shale, limestone, and so on. Clearly, these materials are highly relevant to vineyard geology because more than three-quarters of the land surface is sedimentary in origin: most of the world’s vineyard areas are underlain by sedimentary rocks. Sediment is the detritus produced from the weathering of already existing rocks. (I explore the process in Chapter 9.) Usually, wind, ice, or water soon moves the debris away, e

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Cheuk C.Y., White D.J., and Bolton M.D. "Deformation mechanisms during uplift of buried pipes in sand." In Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering. IOS Press, 2005. https://doi.org/10.3233/978-1-61499-656-9-1685.

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To investigate the deformation mechanisms during uplift of a pipe buried in sanda series of tests was conducted in a plane-strain calibration chamber. Image analysis was used to track the soil movement through a window. From an initial embedment of 3 diameters, a model pipe was extracted vertically whilst digital cameras captured the soil movement. Tests were conducted in uniform silica sands with grain sizes varying over one order of magnitude. During uplift, wide zones of distributed shear developed between the pipe shoulders and the ground surface. Beyond peak resistance, the deformation lo

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Kamiya, K., and T. Uno. "Grain size and void diameter distributions of sands." In Unsaturated Soils for Asia. CRC Press, 2020. http://dx.doi.org/10.1201/9781003078616-68.

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"Grain size effects on rockfill constitutive behaviour." In Unsaturated Soils. Advances in Geo-Engineering. CRC Press, 2008. http://dx.doi.org/10.1201/9780203884430-48.

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Romero, E., A. Ramon, and E. Alonso. "Grain size effects on rockfill constitutive behaviour." In Unsaturated Soils. Advances in Geo-Engineering. Taylor & Francis, 2008. http://dx.doi.org/10.1201/9780203884430.ch42.

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Conference papers on the topic "Grain size groups of soils"

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Paseka, Stanislav. "COMPARISON OF FIELD AND LABORATORY METHODS FOR THE ASSESSMENT OF SOIL HYDRAULIC CONDUCTIVITY." In 24th SGEM International Multidisciplinary Scientific GeoConference 2024. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024/3.1/s12.01.

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Hydraulic conductivity (KS) is a critical parameter used in soil and land research, essential for accurate hydrological modelling. This study endeavours to compare assessments of KS across designated sites near the Czech Republic - Poland border using a range of measurement techniques, with the aim of establishing their reliability and variability for modelling applications. The investigation spans the determination of permeability from grain size curves, KS estimation via field infiltration tests employing the double-ring method, and laboratory KS determination using a constant head permeamet

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Kim, YoungSeok, Seung-Seo Hong, Jung-Hee Park, Jae Mo Kang, and Jong-Sub Lee. "A Study on Characteristics of Frost Heaving With Soil Samples From Terra Nova in the East Antarctic Region." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83119.

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The second scientific Antarctica station of South Korea is under construction at Terra Nova Bay located in east Antarctica. The objective of this study is the evaluation of the frost heave susceptibility of soils sampled from the second station site by performing laboratory frost heaving tests. Experiments are carried out with the soil specimens taken from five different areas at Terra Nova Bay. Test specimens are frozen with constant temperatures at the top and bottom of the specimen at −17 °C and 4 °C, respectively. In addition, grain size analyses and unfrozen water tests are also performed

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Zhang, Y. D., J. S. Park, S. Gao, A. Sonta, B. Horin, and G. Buscarnera. "Effect of Grain Crushing and Grain Size on the Evolution of Water Retention Curves." In Second Pan-American Conference on Unsaturated Soils. American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784481684.028.

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Schulte, Kathryn E., Sophia L. Heng, Patricia J. Culligan, and John T. Germaine. "Intrinsic Sorptivity for Soils with Different Average Grain Size Diameters." In GeoCongress 2008. American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/40972(311)102.

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Martin, Declan, Alicia Bonar, and Gerilyn (Lynn) S. Soreghan. "GRAIN SIZE DISTRIBUTIONS OF MEDITERRANEAN SOILS AND ASSOCIATED IMPLICATIONS FOR SILT GENERATION." In GSA Connects 2022 meeting in Denver, Colorado. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022am-381883.

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Martin, Declan, Alicia Bonar, Lily Pfeifer, and Gerilyn S. Soreghan. "EXPLORING SILT ORIGINS THROUGH GRAIN SIZE ANALYSIS OF MEDITERRANEAN SOILS AND DUST." In 57th Annual GSA South-Central Section Meeting - 2023. Geological Society of America, 2023. http://dx.doi.org/10.1130/abs/2023sc-385190.

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Shahbazan, P., A. Khosravi, P. Toomani, A. Pak, and M. Rahimi. "Impact of Grain Size Distribution Curve on the Small Strain Shear Modulus of Unsaturated Clean Sand." In Second Pan-American Conference on Unsaturated Soils. American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784481684.056.

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Aytekin, Mustafa, and Emel Turker. "PREDICTION OF WATER RETENTION CURVES OF SOILS FROM THEIR GRAIN-SIZE DISTRIBUTION CURVE." In Proceedings of the 3rd and 5th International Conference. WORLD SCIENTIFIC, 2011. http://dx.doi.org/10.1142/9789814365161_0033.

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Abdullah, Mohammed Yaseen. "Correlation of grain size distribution with the compaction parameters for fine-grained soils." In FOURTH INTERNATIONAL CONFERENCE ON ADVANCES IN PHYSICAL SCIENCES AND MATERIALS: ICAPSM 2023. AIP Publishing, 2024. http://dx.doi.org/10.1063/5.0205152.

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Washington, Paul, Richard Washington, and Mathieu Washington. "CALCULATING CAPILLARITY IN GRANULAR SOILS AS A FUNCTION OF GRAIN-SIZE PARAMETERS AND PACKING." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-358654.

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Reports on the topic "Grain size groups of soils"

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Głąb, Tomasz, Jarosław Knaga, Tomasz Zaleski, Paweł Dziwisz, Jan Gluza, and Dariusz Glanas. Determination of soil particle size distribution using computer analysis of microscopic images. Publishing House of the University of Agriculture in Krakow, 2025. https://doi.org/10.15576/repourk/2025.1.3.

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The project aims to develop a prototype device for determining the texture of soils and mineral deposits. The innovation of the designed solution consists in a significant reduction in the time of composition analysis with the possibility of any division into granulometric groups and the complete automation of the measurement from the moment the sample is introduced into the apparatus until the result is obtained. As part of the project, industrial research and experimental development are planned to be divided into the following stages: 1. Development of the measuring system. 2. Development o

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Letcher, Theodore, and Julie Parno. Incorporating advanced snow microphysics and lateral transport into the Noah-Multiparameterization (Noah-MP) land surface model. Engineer Research and Development Center (U.S.), 2023. http://dx.doi.org/10.21079/11681/47660.

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The dynamic state of the land surface presents challenges and opportunities for military and civil operations in extreme cold environments. In particular, the effects of snow and frozen ground on Soldier and vehicle mobility are hard to overstate. Current authoritative weather and land models are run at global scales (i.e., dx > 10 km) and are of limited use at the Soldier scale (dx < 100 m). Here, we describe several snow physics upgrades made to the Noah-Multiparameterization (Noah-MP) community land surface model (LSM). These upgrades include a blowing snow overlay to simulate the lat

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Montalvo-Bartolomei, Axel, Bryant Robbins, Erica Medley, and Benjamin Breland. Backward erosion testing : Magnolia Levee. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/42140.

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Using a confined flume device, an experimental study investigated the critical horizontal gradient of soils obtained from a site identified as potentially vulnerable to backward erosion piping (BEP). Tests were conducted on glacial outwash material obtained from a sand and gravel quarry in the vicinity of Magnolia Levee in the community of Magnolia, OH. The two bulk samples collected from the quarry had similar grain-size distributions, grain roundness, and depositional environments as the foundation materials beneath the levee. Samples were prepared at various densities and subjected to gradu

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Schofield, Ian S., Paul L. Brown, Mark J. Logsdon, and Matthew P. Wickham. Waste Rock Dump Characterization Studies at the Bingham Canyon Mine. Utah Geological Survey, 2024. http://dx.doi.org/10.34191/mp-179.

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The Bingham Canyon Mine, located near Salt Lake City, Utah, is surrounded by more than 6 billion tons of waste rock developed over the open cut mining history from 1903 to present; the surface area of the waste rock is approximately 5000 acres. Waste rock dumps have a thickness of more than 1 200 feet from crest to toe. From 1930 to 2000, selected portions of the waste rock dumps were commercially leached using a ferric-sulfate-based lixiviant to extract copper, whereas other portions have only received meteoric leaching. From 2011 to present, Rio Tinto Kennecott has studied the evolution and

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Oliynyk, Kateryna, and Matteo Ciantia. Application of a finite deformation multiplicative plasticity model with non-local hardening to the simulation of CPTu tests in a structured soil. University of Dundee, 2021. http://dx.doi.org/10.20933/100001230.

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In this paper an isotropic hardening elastoplastic constitutive model for structured soils is applied to the simulation of a standard CPTu test in a saturated soft structured clay. To allow for the extreme deformations experienced by the soil during the penetration process, the model is formulated in a fully geometric non-linear setting, based on: i) the multiplicative decomposition of the deformation gradient into an elastic and a plastic part; and, ii) on the existence of a free energy function to define the elastic behaviour of the soil. The model is equipped with two bonding-related intern

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Charusiri, Punya, Wasant Pongsapich, and Chakkaphan Sutthirat. Petrochemistry of probable gem-bearing basalts in Sop Prap-Ko Kha Area, Changwat Lampang : research report. Chulalongkorn University, 1996. https://doi.org/10.58837/chula.res.1996.17.

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Abstract:

The project area covers approximately 300 km[superscript 2] encompassing parts of Amphoe Sop Prap, Amphoe Ko Kha, and Amphoe Mae Tha of Changwat Lampang. The area is mainly occupied by sedimentary (and metamorphic) rocks of Permian, Triassic, Tertiary and Quaternary ages. The Triassic rocks include the Phra That, the Pha Kan, and the Hong Hoi Formations of the Lampang Group. Igneous rocks comprise Permo-Triassic volcanics, Triassic granodiorite, and Cenozoic basalts. Sapphires are frequently found in alluvial and residual deposits, particularly in the northern basaltic area. Sapphires in the s

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