Hydrous components in nominally anhydrous minerals have been the object of increasing study for the past three decades. OH ions and, less commonly, H2O molecules are found in many anhydrous minerals at concentrations ranging from ppms to tenth's of a percent by weight. Infrared spectroscopy remains the preferred method to characterize these components …
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The first minerals of the Earth were formed very early in time, mainly during the Hadean period. Minerals are only formed when there is energy release due to the recombination of the elements, however, this rearrangement can only occur with elements of certain chemical characteristics that will allow them to become incorporated into crystalline structures; these …
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The interactions between additives and mineral precursors and intermediates are at the heart of additive-controlled crystallisation, which is of high importance for various fields. …
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When processing a mineral, a plant must optimize process efficiency and minimize waste generation. Determining the content of useful components and ore properties …
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ABSTRACT We present a case study of applying 3D inversion of gravity gradiometry data to iron ore exploration in Minas Gerais, Brazil. The ore bodies have a distinctly high-density contrast and produce well-defined anomalies in airborne gravity gradiometry data. We have carried out a study to apply 3D inversion to a subarea of data from a larger survey to demonstrate the utility of …
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Disruptions in the minerals supply chain play a central role in defining the future stock of minerals; therefore, an in-depth analysis of the outcomes and variables affecting exploration is required. In comparative terms, the exploration of critical minerals and major minerals presents geological and technical differences; thus, exploration budgets for critical …
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This study has developed a new theoretical model to predict the additive impacts on crystallization based on the classical nucleation theory and regular solution theory. The …
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Secondary mineral assemblages are composed of iddingsite-like veins ( 0.2 vol.%), threadlike maghemite, hematite veins, and altered pyrrhotite. Olivine alteration veins are likely to contain a ...
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Mineralogy is the scientific study of minerals. The issue at hand is the definition of the term "mineral," which was first used in Medieval Latin in the late fourteenth century as minerale, or "something mined."The term survives today in common use forms, for example, "mineral water" and "vitamins and minerals" that have nothing to do with the science of …
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Clay-size minerals play important roles in terrestrial biogeochemistry and atmospheric physics, but their data have been only partially compiled at global scale. We present a global dataset of ...
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The effects of solid and liquid additives on a dry grinding process were studied at four additive concentrations and two grinding times, using a laboratory vibration ball mill with …
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Keywords: mineralogical studies, mineral individuals and aggregates, anatomy and ontogeny of minerals, mineralogical laws and patterns, indicator minerals and geochronometers, typomorphism, petro- and ore genesis DOI: 10.1134/S1075701521070059 INTRODUCTION Mineralogy is the basis of our knowledge of the Earth's substance, and minerals are an ...
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The resultant spectrum of absorption frequencies is a characteristic property of the mineral which can not only serve as a fingerprint for its identification, but also give, in favourable cases, unique information on features of the structure, including the nature of isomorphic substituents, the differentiation of molecular water from ...
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As an indispensable part of reservoir exploration, several studies have indicated that evaluating the clay mineral composition in rocks through mineral analysis is significant in evaluating the existence mechanism of shale gas (Chen et al., 2015), and minerals such as iron, gypsum, pyrite and kaolinite may be catalytic elements in the maturation process of carbonate …
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The document summarizes experimental studies of oxide minerals. It discusses the goals of such studies, including determining conditions of oxide mineral formation. It focuses on oxide minerals found in rocks from the crust and upper mantle, excluding silicate phases. The document outlines techniques for controlling experimental parameters like temperature, …
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Ettringite, reported with ideal formula Ca 6 Al 2 (SO 4) 3 (OH) 12 ·26H 2 O, is recognized as a secondary-alteration mineral and as an important crystalline constituent of Portland cements, playing different roles at different time scales. It contains more than 40 wt% of H 2 O. The crystal structure and crystal chemistry of ettringite were investigated by electron microprobe analysis …
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A good review and early study showed the potential of spectroscopy on conveyor belts for ore to waste separation (Goetz et al., 2009). More recently, studies commenced looking at real-time ore sorting using spectral measurements on porphyry copper to distinguish copper grades (Dalm et al., 2017, Dalm et al., 2014, Iyakwari and Glass, 2014).
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The pore evolution in ORSs is affected by mineral composition, organic material, diagenetic fluids, temperature, pressure, and other factors, reflecting the combined interaction of organic material and inorganic minerals. In this study, the organic and mineral composition of the three types of ORSs changed obviously during the experiments.
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Kato, Y. (1965) Mineralogical study of weathering products of granodiorite at Shinshiro City, Japan. III. Weathering of primary minerals. (2) Mineralogical characteristics of weathered mineral grains. Soil Science and Plant Nutrition, 11, 30–40.Google Scholar
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Grinding aid additives are established in various industrial dry fine grinding processes, primarily to achieve either a) an increase of the production capacity, b) a decrease …
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Petrologists who study rocks of all sorts need to know about minerals. And others who use resources in manufacturing need minerals. So, the world's people rely on minerals. And, minerals, mineral production, and …
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In addition the study reviewed whether the current mineral development policies and taxation are adequate to encourage value addition downstream and also investigate local and regional market for ...
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Until recently, the classic approach to mineral exploration studies was to bring the field samples/drill cores collected during field studies to the laboratory, followed by laborious analysis procedures to generate the analytical data. This is very expensive, time-consuming, and difficult for exploring vast areas. However, rapid technological advances in field-portable …
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There are numerous spectrometric and spectroscopic techniques that can be employed to study both mineral bulk and surface chemistry (Cormia, 1992, Marabini et al., 1993). Some of these techniques are more applicable for identifying and understanding interactions between minerals and various components within the hosting pulp. The most …
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Experimental The minerals samples used in this study were collected in the form of large lumps (≥ 20 cm) from different Sudanese states. The samples were prepared by stage-crushing, in a laboratory jaw Page|66 Journal of Petroleum and Mining Engineering 24 (1) 2022 Mineral Compressibility (Piston Displacement) As shown in Figure 2, for all ...
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Biomineralization is the formation and deposition of minerals and processes contributing to the creation of these organic-inorganic composites (Weiner and Dove 2005; Estroff 2008).This process holds a special position in life sciences because, unlike other biological transformations, which at best leave no lasting signature on the environment or a tenuous …
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The ECA's Economic Report for Africa (2015) discusses the negative effects of weakened commodity prices on the growth of mineral dependent countries in Africa, including, for example, reductions in revenues and employment. In Africa, key minerals and oil exporting countries such as South Africa, Ghana, and Nigeria have been adversely affected by the …
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Sediment provenance studies concern the origin, composition, transportation and deposition of detritus and therefore are an important part of understanding the links between basinal sedimentation, and hinterland tectonics and unroofing. ... "Raman spectroscopy in heavy-mineral studies", Sediment Provenance Studies in Hydrocarbon Exploration and ...
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Read the latest chapters of Studies in Environmental Science at ScienceDirect, Elsevier's leading platform of peer-reviewed scholarly literature ... Book series. Chapters & Volumes. Menu. Chapters & Volumes. Latest volume; All volumes; Submit search. Biogeochemical Cycling of Mineral-Forming Elements. Edited by . P.A. Trudinger - Baas ...
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Previous studies show that sensor-based sorting can reduce energy, water and reagent consumption and fine waste production by discarding waste prior to further processing.
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