Listing 1 - 4 of 4 |
Sort by
|
Choose an application
This book describes the mineralization process of barite-fluorite deposits in southeastern Sichuan, Yangtze Block, China. Mainly through systematic field geological surveys and detailed indoor research work, the typical barite-fluorite deposits in this area were analyzed using a variety of analysis methods such as single fluid inclusion LA-ICP-MS composition analysis, trace rare earth element analysis, H-O-S-Sr isotope analysis, F element content analysis, and Sm-Nd geochronological analysis. By in-depth analysis of the ore-forming environment, mineralization process and geological characteristics of barite-fluorite deposits, the following were determined: (1) the source of ore-forming fluids of barite-fluorite deposits and (2) the migration, concentration, enrichment, and evolution of ore-forming sources, exploring the formation mechanism of barite-fluorite deposits. Summarizing the mineralization regularity of the deposit in this area of China provides a new insight and basis for the study of similar types of deposits in the world.
Barite. --- Fluorspar. --- Derbyshire spar --- Florspar --- Fluor --- Fluor spar --- Fluorite --- Murra --- Murrha --- Murrhina --- Myrrha --- Halide minerals --- Calcium fluoride --- Baryte --- Barytes --- Cawk --- Heavy spar --- Sulfate minerals --- Barite --- Fluorspar
Choose an application
Un filon à fluorite de couleur blanchâtre, riche en terres rares (REE), affleure dans une galerie au nom de « Mine à Hubacher », au Mont Chemin, situé en bordure septentrionale du Massif du Mont-Blanc, en Suisse. Pour des raisons économiques, l’exploitation du filon fluoré, contenu dans un encaissant gneissique à quartz-porphyrique, n’a jamais vu le jour. Les différentes méthodes d’analyses (observations macroscopiques et pétrographiques, la diffraction des rayons X sur poudre et monocristaux, la fluorescence X en laboratoire et portable, et les analyses qualitatives au MEB) ont permis une caractérisation minéralogique du filon. Elles présentent trois types de fluorite relativement différents au niveau visuel (une laiteuse, une verdâtre et une limpide), accompagnés de barite et de sulfures de plomb, de zinc, de cuivre et de fer ainsi qu’une large gamme de minéraux secondaires, comme les veines à césarolite. Actuellement, il existe deux hypothèses concernant la genèse de ces minéralisations. La première donne pour origine la formation du massif du Mont-Blanc au Carbonifère Supérieur (325-280 Ma), par le biais de remontées de fluides minéralisés en éléments légers et métaux lourds, grâce aux failles en périphérie. La seconde soutient une genèse par une circulation de fluides descendante datant du Permien au Trias Inférieur (280-230 Ma), à l’aide de fractures profondes dans le socle cristallin. Les résultats obtenus suggèrent un nouveau modèle, combinant ces deux hypothèses. Des paragenèses minérales, propres aux épisodes géologiques clés, et les séries d’altération des sulfures, viennent étayer cette hypothèse.
Choose an application
Fluorspar --- -Geology --- -Karst --- -Karsts --- Landforms --- Geognosy --- Geoscience --- Earth sciences --- Natural history --- Derbyshire spar --- Florspar --- Fluor --- Fluor spar --- Fluorite --- Murra --- Murrha --- Murrhina --- Myrrha --- Halide minerals --- Calcium fluoride --- Theses --- -Theses --- Geology --- Karst --- Karsts --- MINERALOGIE APPLIQUEE --- EUROPE OCCIDENTALE --- FRANCE --- GEOLOGIE REGIONALE --- GEOMORPHOLOGIE GENERALE --- KARST --- PETROLOGIE ROCHES IGNEES --- ETUDE REGIONALE --- GENESE
Choose an application
Various scientific events are being held around the world under the auspices of this landmark event, the Year of Mineralogy, and it is highly satisfying that this Special Issue “Mineralogical Crystallography Volume II” is published in 2022. The first volume of the “Mineralogical Crystallography” Special Issue [1] consisted of such topics as: Discovery of new mineral species; Crystal chemistry of minerals and their synthetic analogs; Behavior of minerals at non-ambient conditions; Biomineralogy; and Crystal growth techniques, and appeared to be very fruitful. The Special Issue “Mineralogical Crystallography Volume II” covers the following topics: Crystal chemistry and properties of minerals and their synthetic analogs; Gemology; Natural-based cement materials; Biomineralogy; and Crystal growth techniques. Additionally, we hope that this continuation will be just as successful, and that the new set of papers will again arouse genuine interest among readers and, perhaps, inspire them in their own successful research. We also believe that with the current collection of papers, we will be able to pay tribute to the union of Mineralogy and Crystallography.
Research & information: general --- uranyl --- carbonate --- mineral --- crystal structure --- topology --- structural complexity --- bentonite --- mordenite --- smectite --- pozzolanicity test --- cement --- concrete --- shchurovskyite --- synthesis --- X-ray diffraction --- oxocentered tetrahedra --- Barite --- hydrothermal synthesis --- typomorphic characteristics --- in-situ mixing solutions at high temperature --- high iron and quartz contents coal gangue --- acid leaching --- alkali melting --- hydrothermal reaction --- NaA zeolite --- fluorite --- pozzolan --- mortar --- mechanical strength --- reduction of CO2 emissions --- hydroxyapatite composite --- spinel --- beverage cans --- bovine bones --- lorenzenite --- perovskite --- loparite --- titanite --- apatite --- carbonates --- Khibiny --- Lovozero --- Kovdor --- Afrikanda --- alkaline intrusions --- NF Fennoscandia --- glass-ceramics --- phase separation --- nucleation --- crystallization --- microstructure --- gahnite --- gold nanoparticles --- surface plasmon resonance --- plasmonics --- ivanyukite --- lintisite --- SIV --- AM-4 --- sorption --- lead --- ion-exchange --- titanosilicate --- Arctic --- channel-water --- X-ray fluorescence --- infrared spectroscopy --- UV–vis spectroscopy --- transition metal ions --- self-healing concrete --- calcium nitrate --- mineralization reaction --- cracks --- near-infrared spectroscopy --- kaolinite --- dickite --- OH group --- forsterite --- boron --- spectroscopy --- orthoclase crystal --- ultra-microchannel --- water --- feldspar alteration --- sericitization --- gemological --- mineralogical --- greenish blue apatite --- fluorapatite --- n/a --- UV-vis spectroscopy
Listing 1 - 4 of 4 |
Sort by
|