Letteratura scientifica selezionata sul tema "Dykes – Teneur en lithium"
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Articoli di riviste sul tema "Dykes – Teneur en lithium":
Ding, Wenqing, Lin Ding, Qingting Li, Jinxiang Li e Liyun Zhang. "Lithium-Rich Pegmatite Detection Integrating High-Resolution and Hyperspectral Satellite Data in Zhawulong Area, Western Sichuan, China". Remote Sensing 15, n. 16 (10 agosto 2023): 3969. http://dx.doi.org/10.3390/rs15163969.
Cooper, Alan F., Lorraine A. Paterson e David L. Reid. "Lithium in carbonatites — consequence of an enriched mantle source?" Mineralogical Magazine 59, n. 396 (settembre 1995): 401–8. http://dx.doi.org/10.1180/minmag.1995.059.396.03.
Sudraud, P., Bernard Médina e J. P. Grenon. "Teneurs en éléments minéraux des vins". OENO One 28, n. 1 (31 marzo 1994): 69. http://dx.doi.org/10.20870/oeno-one.1994.28.1.1157.
González-Larraina, Miguel, A. González e Bernard Médina. "Les ions métalliques dans la différenciation des vins rouges des trois régions d'appellation d'origine Rioja". OENO One 21, n. 2 (30 giugno 1987): 127. http://dx.doi.org/10.20870/oeno-one.1987.21.2.1277.
Cathelineau, Michel, Marie-Christine Boiron, Andreï Lecomte, Ivo Martins, Ícaro Dias da Silva e Antonio Mateus. "Lithium-, Phosphorus-, and Fluorine-Rich Intrusions and the Phosphate Sequence at Segura (Portugal): A Comparison with Other Hyper-Differentiated Magmas". Minerals 14, n. 3 (8 marzo 2024): 287. http://dx.doi.org/10.3390/min14030287.
Zhou, Qifeng, Kezhang Qin, Dongmei Tang e Chunlong Wang. "A Combined EMPA and LA-ICP-MS Study of Muscovite from Pegmatites in the Chinese Altai, NW China: Implications for Tracing Rare-Element Mineralization Type and Ore-Forming Process". Minerals 12, n. 3 (18 marzo 2022): 377. http://dx.doi.org/10.3390/min12030377.
Zozulya, Dmitry, Lyudmila N. Morozova, Kåre Kullerud e Ayya Bazai. "Nb-Ta-Sn Oxides from Lithium-Beryllium-Tantalum Pegmatite Deposits of the Kolmozero–Voronja Belt, NW Russia: Implications for Tracing Ore-Forming Processes and Mineralization Signatures". Geosciences 14, n. 1 (24 dicembre 2023): 9. http://dx.doi.org/10.3390/geosciences14010009.
Roda-Robles, E., A. Pesquera, P. P. Gil-Crespo, R. Vieira, A. Lima, I. Garate-Olave, T. Martins e J. Torres-Ruiz. "Geology and mineralogy of Li mineralization in the Central Iberian Zone (Spain and Portugal)". Mineralogical Magazine 80, n. 1 (febbraio 2016): 103–26. http://dx.doi.org/10.1180/minmag.2016.080.049.
Agbaye, F. P., A. O. Sokunbi, M. A. Onigemo, O. Alaba, O. A. J. Anjola, E. A. Amao, K. K. Agbalaya et al. "Blood profile of prevalent sheep breeds in Nigeria: A case study of Ikorodu Local Government Area of Lagos State, Nigeria". Nigerian Journal of Animal Production 48, n. 5 (10 novembre 2021): 293–99. http://dx.doi.org/10.51791/njap.v48i5.3173.
El Korh, Afifé, Etienne Deloule, Béatrice Luais, Marie-Christine Boiron, Luc Bastian e Nathalie Vigier. "Lithium Behaviour and Isotope Fractionation During Fluid–Rock Interactions in Variscan Oceanic Suture Zones: Limousin Ophiolite and Ile de Groix High-pressure Terrane (France)". Journal of Petrology 60, n. 10 (1 ottobre 2019): 1963–90. http://dx.doi.org/10.1093/petrology/egz060.
Tesi sul tema "Dykes – Teneur en lithium":
Sanogo, Séko. "Pegmatites lithinifères (Li-Cs-Ta) et roches plutoniques de Bougouni (Sud du Mali, Craton Ouest Africain) : approches pétrographiques, structurales, géochimiques et géochronologiques". Electronic Thesis or Diss., Université de Lille (2022-....), 2022. https://pepite-depot.univ-lille.fr/ToutIDP/EDSMRE/2022/2022ULILR083.pdf.
The Bougouni region in southern Mali is well known for the ore body lithium-bearing pegmatites and aplites. Lithium is currently a strategic element in view of the growing need for this raw material. The lithiniferous pegmatites are thus among the most sought-after deposits for lithium.The study area, located SE of Bamako (Mali), belongs to the southern part of the West African Craton. The various rocks in this area were formed during the Birimian crustal growth events, during the Eburnean oOrogeny, between ca. 2200 and 1800 Ma. The formations encountered are metavolcano sedimentary and plutonic rocks, mostly granitoid (tonalite to two-mica monzogranite), structured in a NNE-SSW direction by the existence of large shear zones. The dykes are intrusive in these host rocks, which occur in the form of decimeter to decameter thick dykes ranging from aplitic to pegmatitic facies. The emplacement in a brittle domain coupled with the low metamorphic grade of the enclosing metasediments indicate a dyke emplacement in the upper continental crust.The Bougouni province has about 100 Li-rich dykes (Li2O > 1.00 wt% of total rock). Spodumene, the main lithium-bearing mineral phase (Li2O = 8 wt%), represents between 5 and 30 vol.% of the rock, accompanied by alkali feldspar, plagioclase, quartz and a small quantity of muscovite and biotite. In addition to, 100 Li-poor dykes (Li2O < 0.05 wt%) that are characterized by the same mineralogical assemblage as the lithium-rich dykes except for spodumene, which is replaced by garnet.Concerning geochronology, U-Pb ages on zircons for all granitoids (granodioritic to granitic facies with two micas) range between 2100 ± 14 and 2136 ± 19 Ma. These ages are in agreement with the ages of other plutonic formations ranging between 2080 and 2120 Ma on the Birimian scale. The U-Pb ages on magmatic apatites of the dykes are between 2070 - 2000 Ma. Comparison of the geochronological data with other pegmatites of the Birimian allow us to define the period ca. 2070 - 2000 Ma as the period of establishment of the pegmatitic dykes (notably the LCT family pegmatites) of the Birimian. This late- to post-Orogenic period would represent the final stage of paleoproterozoic magmatism in the Boulé-Mossi domain.Concerning major and trace elements geochemistry, the absence of a continuous geochemical evolution from granitoids to dykes does not allow to explain the pegmatitic fluids as the most evolved terms of the granitoids. This conclusion is in agreement with the geochronological data that show a much too large age difference between these formations to be genetically related. Concerning the dykes, although they are contemporaneous, the differences in geochemical signature do not allow to explain that they could have evolved from a single parent melt. However, it is very likely that the melts that gave rise to both types of dykes may have been derived from the melting of the same type of metapelitic protolith.In sum, the field, petrographic, geochronological and geochemical data do not provide a genetic link between the Bougouni dykes and granitoids. The two dyke facies are formed from two distinct melts derived from a single protolith. The difference in mineralogical and geochemical composition, particularly in Li, between the Li-rich and Li-poor dykes could be explained by the role of fluids of sedimentary origin that may have percolated and interacted with the source? host rocks and/or the pegmatitic melts, allowing the enrichment of certain fluids in mobile elements such as lithium
Sanchez, Patrick. "Elaboration d'un alliage lithium-bore à haute teneur en lithium zéro-valent étude des propriétés structurales et physiques : applications aux générateurs électrochimiques au lithium /". Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376184327.
Dugamin, Elza. "Facteurs contrôlant les concentrations en métaux dans les eaux de formation des bassins sédimentaires". Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0322.
The energy transition is associated with the increasing use of a wide range of metals, particularly those needed for lithium-ion batteries (e.g. lithium, cobalt), while there is a continuing need for base metals (e.g. copper, zinc). The development of alternative metal resources such as "liquid ores", notably the formation waters of sedimentary basin aquifers, could potentially contribute to meeting global demand. However, the geochemical processes involved in metal enrichment in formation waters remain poorly understood and the following approach was therefore pursued in this work: • Establishment of a database of temperatures and chemical and isotopic compositions of formation waters (3700 analyses) and fluid inclusions that preserved ancient formation waters (1700 analyses) from 90 sedimentary basins worldwide, based on published sources. The objective is to highlight the characteristic concentration ranges of dissolved metals in formation waters and the parameters that control their concentration. • Application to the case study of the Rhine Graben, on the example of the Soultz-sous-Forêts geothermal system, through the analysis of metals in fluid inclusions and minerals of the basin and the crystalline basement. The aim is to provide an overview of metal transfers related to fluid-rock interactions from the Oligocene to Present. The results indicate that formation waters generally acquire their metal load (Li, Mn, Pb, Zn, Fe, Ba, Cu) mainly through fluid-rock interactions, the increase in temperature and salinity facilitating their dissolution. In the peculiar case of lithium, the richest formation waters are most often brines derived from seawater and enriched in salts and partially in lithium by surface evaporation, and subsequently expelled from the evaporitic formations in which they are initially trapped, during tectonic events. The preservation from dilution by recharge fluids, and the interaction with lithologies enriched in lithium (siliciclastic rocks, volcanic levels, crystalline basement) are two key parameters to reach the highest concentrations. The lithium resources estimated in some reservoirs are of the same order of magnitude as those of the salars and hard-rock mines (granites, pegmatites) currently exploited. In the case of the Rhine Graben, brines from the Triassic formations mix with more diluted waters infiltrated from the Vosges mountains, and carry significant amounts of lithium (up to 200 mg.l⁻¹ in the present-day formation waters) as well as other metals (e.g. Pb, Zn, Cu, As, Sb). Fluid inclusions show that lithium concentrations from 3 to 800 ppm of lithium were reached between the Oligocene and Present. Mineral analysis indicates that the main Li carriers (Fe, Mn, Zn) in the crystalline basement are biotite, amphibole and chlorite, which were probably significant sources for these metals
Li, Pei. "Water contents and lithium isotope compositions of the Mesozoic-Cenozoic lithospheric mantle of eastern North China Craton : constraints from peridotite xenoliths". Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0415/document.
In order to investigate the geodynamic cause for destruction of the North China Craton (NCC), the role of mantle fluids is examined. The aim of the PHD work is to clarify H2O contents and lithium isotopic compositions of the NCC lithospheric mantle by studying peridotite xenoliths hosted by Mesozoic-Cenozoic basalts across eastern NCC. A temporal variation of H2O content has been revealed, and it has deep implications for processes of craton destruction. The Cenozoic lithospheric mantle was featured by low H2O content, interpreted to be the relict mantle that survived the lithospheric thinning and has been dewatered by reheating from upwelling asthenospheric flow. The late-Mesozoic lithospheric mantle showed relatively high H2O content, a hydrous status intermediate between the Cretaceous hydration and the Cenozoic dryness, indicating the dehydration of the NCC mantle with time during NCC destruction. The dehydration, facilitated by thinning of weak mantle pieces at bottom, is one way by which the lithosphere strengthens itself to survive in the convecting mantle. Extreme Li and isotopic disequilibria were observed intra- and inter-mineral in the peridotites. With numerical simulations, we demonstrate two superimposed Li enrichment events occurring at the mantle: a limited Li enrichment (< 5 ppm) and large delta7Li depletion (-20~-10[per 1000]) of the mantle domain, followed by a recent and transient infiltration of high Li and delta7Li (up to +20 [per 1000]) melts/fluids. The anomalous Li isotopic compositions of mantle metasomatic agents call upon the same of their mantle sources, and we assume recycled components, both Li isotopically heavy and light, in the mantle beneath the eastern NCC
Boniface, Maxime. "Suivi à l'échelle nanométrique de l'évolution d'une électrode de silicium dans un accumulateur Li-ion par STEM-EELS". Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAY051/document.
Over the last 25 years, the performance increase of lithium-ion batteries has been largely driven by the optimization of inactive components. With today’s environmental concerns, the pressure for more cost-effective and energy-dense batteries is enormous and new active materials should be developed to meet those challenges. Silicon’s great theoretical capacity makes it a promising candidate to replace graphite in negative electrodes in the mid-term. So far, Si-based electrodes have however suffered from the colossal volume changes silicon undergoes through its alloying reaction with Li. Si particles will be disconnected from the electrode’s percolating network and the solid electrolyte interface (SEI) continuously grows, causing poor capacity retention. A thorough understanding of both these phenomena, down to the scale of a single silicon nanoparticle (SiNP), is critical to the rational engineering of efficient Si-based electrodes. To this effect, we have developed STEM-EELS into a powerful and versatile toolbox for the study of sensitive materials and heterogeneous systems. Using the low-loss part of the EEL spectrum allows us to overcome the classical limitations of the technique.This is put to use to elucidate the first lithiation mechanism of crystalline SiNPs, revealing Li1.5Si @ Si core-shells which greatly differs from that of microparticles, and propose a comprehensive model to explain this size effect. The implications of that model regarding the stress that develops in the crystalline core of SiNPs are then challenged via stress measurements at the particle scale (nanobeam precession electron diffraction) for the first time, and reveal enormous compressions in excess of 4±2 GPa. Regarding the SEI, the phase-mapping capabilities of STEM-EELS are leveraged to outline the morphology of inorganic and organic components. We show that the latter contracts during electrode discharge in what is referred to as SEI breathing. As electrodes age, disconnection causes a diminishing number of SiNPs to bear the full capacity of the electrode. Overlithiated particles will in turn suffer from larger volumes changes and cause further disconnection in a self-reinforcing detrimental effect. Under extreme conditions, we show that SiNPs even spontaneously turn into a network of thin silicon filaments. Thus an increased active surface will compound the reduction of the electrolyte and the accumulation of the SEI. This can be quantified by summing and averaging STEM-EELS data on 1104 particles. In half-cells, the SEI volume is shown to increase 4-fold after 100 cycles without significant changes in its composition, whereas in full cells the limited lithiation performance understandably leads to a mere 2-fold growth. In addition, as the operating potential of the silicon electrodes increases in full cells – potential slippage – organic products in the SEI switch from being carbonate-rich to oligomer-rich. Finally, we regroup these findings into an extensive aging model of our own, based on both local STEM-EELS analyses and the macro-scale gradients we derived from them as a whole
Tesfaye, Alexander Teklit. "Study and improve the electrochemical behaviour of new negative electrodes for li-ion batteries". Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0346/document.
Currently, commercial lithium ion batteries (LIBs) use carbon based materials as negative electrode; however the technology is reaching its limit because of the low theoretical specific capacity. The objective of this thesis is to study the electrochemical behaviour of three different new high capacity anodes (SnSb alloy, anodized Ti3SiC2, and Si nanotubes) as alternative to graphite, identify the main parameters responsible for the capacity fading, and propose a versatile solution to improve their electrochemical performance. These electrode materials exhibit good electrochemical performance which makes them promising candidates to replace carbon as a negative electrode for LIBs. However, their limitation due to capacity fading and the large initial irreversible capacity loss must be resolved before commercialization. The observed limitations are attributed to many factors, and particularly, to the formation and growth of SEI layer which is the common factor for all the three electrode materials. Because of the strong capacity fade and lack of many detailed studies on the Sn-based materials, specifically SnSb, we focus our study to investigate the formation and growth of SEI layer on SnSb electrode. The evolution of the electrical, compositional, and morphological properties have been investigated in detail to understand the electrochemical behavior of micron-sized SnSb. To limit the capacity fade, we propose the use of a protective film on the electrode surface. The electrochemical performance of micron-sized SnSb electrode coated with thermoplastic elastomer protective film, namely poly(styrene-b-2-hydroxyethyl acrylate) PS-b-PHEA has been achieved
Khaska, Mahmoud. "Vulnérabilité des ressources en eau souterraine : origines de la salinité en domaine karstique côtier et de la contamination après-mine en métaux lourds. Approche par multitracage géochimique". Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4381.
The first theme has for objectives: 1) to trace the origin of the salinity of the waters of the karst aquifers in coastal environment mediterraneen,2) to quantify the mixing proportions between salt waters and the waters karstiques,3) to discriminate the geochemical tracers to identify and model the process of salinization of aquifers coastal karst. The second theme has for objectives:1) to establish the [hast] of natural origin of surface waters and groundwater, 2) to quantify the level of contamination by arsenic in these waters and its spatial and temporal variability 3) to trace the natural or anthropogenic origin of pollution in hast to the aid of isotopic tools adapted. the origins of the salinity identified include i) of came from deep waters salted ii) of come deep water salted dating back toward the surface by a major flaw normal. The 36Cl/Cl has allowed us to identify the origin of deep saline waters and a recharge of meteoric water infiltrated during the period of thermonuclear tests. The PHREEQC modeling used to differentiate between the mixture with a deep water of salt that one with a sea water current. The 87SR/ 86Sr shows a conservative behavior for tracing the origin of saline waters in karst aquifers. The plotters Cs, Rb, Li and B allows to differentiate the three origins identified of salinity. The data acquired on the contamination in hast underline a net increase and perennial of [hast] from the ancient sites of mining processing rehabilitated. The reports 87SR/ 86Sr and δ18O and δ2H will reveal in this case a chartplotter very discriminant of natural or anthropogenic origin of arsenic
Atti di convegni sul tema "Dykes – Teneur en lithium":
Cardoso-Fernandes, Joana, Encarnación Roda-Robles, Jon Errandonea-Martin, Idoia Garate-Olave, Alexandre Lima, Maria dos Anjos Ribeiro, Cátia De Almeida e Ana Teodoro. "Mineral chemistry and spectroscopy of metasedimentary host rocks of aplite-pegmatite dykes: one step closer to the detection of buried Lithium (Li) pegmatites in the Fregeneda-Almendra area". In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.11309.