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Petroleum) auf den W#252;rfelfl#228;chen bedeckt. 6 Meilen westlich von Madoc ein ehemaliger Stra#223;enbauAufschluss, welcher sehr sch#246;ne, schleifw#252;rdige gr#252;ne Fluorite geliefert hat. Sch#246;ne Stufen im National Museum of Canada. Paragenese: Calcit, Baryt, Quarz, Galenit, Sphalerit, Tetraedrit, C#246;lestin, H#228;matit, Pyrit, Malachit, Boulangerit, Chalcopyrit, Marcasit, Bindheimit, Mikroklin und
Brecciosted fluoritebastnaesite deposits associated with epizonal quartz syenite intrusions in the Gallinas Mountains, New Mexico, provide an important example of hydrothermal rare earth element (REE) mineralization, and an excellent opportunity to investigate the transport and deposition of the REE under hydrothermal conditions. Fluid inclusion studies show that mineralization commenced
in all several thousand tons of fluorite per annum'' The rock formation in the region around Madoc as indicated by MiIIer and Knightr consists of Precambrian (Keewatin, Grenville and Hastingsj, with intrusions of Moira granite, on which lies the Black River limestone. This whole series is cut by veins carrying fluorite, calcite and barite. Many years ago some of the lrquot;]rr. *quot;r.
there are several U deposits in siliciclastic formations in the region. The formation of such deposits is attributed to similar uids to those that formed MVT and associated deposits, and about the same time [1,2]. Besides Urich associations, Berich associations that similarly postdate MVTlike deposits, occur in the study area.
Fluorite commonly occurs as vibrant, wellformed crystals. A single crystal may have zones of different colors that follow the contour of the crystal faces. Fluorite crystals are widely found in cubes, while fluorite octedra which are often twinned are much less common. The mineral can also be massive, granular, or compact. Fluorite occurs in hydrothermal deposits and as an accessory mineral
Fluorite (also called fluorspar) is the mineral form of calcium fluoride, CaF belongs to the halide crystallizes in isometric cubic habit, although octedral and more complex isometric forms are not uncommon.. The Mohs scale of mineral hardness, based on scratch hardness comparison, defines value 4 as Fluorite.. Pure fluorite is transparent, both in visible and ultraviolet
Fluorite deposits occur in a variety of geologic environments throughout the globe. It may occur as the main or only economically recoverable ore mineral in deposits or may present as the accessory gangue minerals with other ores. It is therefore necessary to understand various genetic types of the fluorite deposit. The present paper synthesises the information of some of the known fluorite
#0183;#32;Cambridge, MA 02138, {Received 1 September 1978; accepted in revised form 4 April 1979) Abstracturing the formation of fluorite deposits fluorite is precipitated either as a consequence of changes in temperature and pressure along the flow path of hydrothermal solutions or due to fluid mixing, or as the result of the interaction of hydrothermal solutions with wall rocks.
Fluorite is the only mineral for which significant quantities of the important element fluorine can be obtained. Fluorite is also used as a flux in the manufacture of steel and other metals to eliminate is a great demand for Fluorite in the optics field, and to meet it synthetic crystals are grown to produce special lenses.
nificance for deciphering the formation conditions of the fluorite deposits . [20] The REE in the fluorite therefore may be used as the genetic indicators for the fluorite as is discussed in the present study. Keeping in view all the above classification schemes, we propose to classify all the fluorite deposit in three categories based upon their lithological association as: (a) fluorite
Late stage fracture faults were filled with fluorite, calcite, and baryte. These became the economic basis of Madocs well known fluorite mining industry that flourished in the 1930s and 40s. About 1000 million years ago, there was a period of mountain building which affected all of eastern Ontario.
Cover, Fluorite specimen, courtesy Royal Ontario Museum Page Crystal fluorite from the Madoc area.. vi Cardiff Uranium Mines Limited, 1956.. 9 Adit entrance on the Clark property, 1963.. 13 Fluorite lenticles on weathered surface, Dwyer
Deposits of Cenozoic and, to a lesser extent, Mesozoic age predominate. Those of Paleozoic age are uncommon and only a few Precambrian deposits with characteristics similar to porphyry coppers have been described (Kirkham, 1972; Gaal and Isohanni, 1979). Deformation and metamorphism of the older deposits commonly obscured primary features, hence they are difficult to recognize (Griffis, 1979
1/8/1979#0183;#32;During the formation of fluorite deposits fluorite is precipitated either as a consequence of changes in temperature and pressure along the flow path of hydrothermal solutions or due to fluid mixing, or as the result of the interaction of hydrothermal solutions with wall rocks. A decrease in temperature in the flow direction is the most appealing, though still unproven, mechanism of fluorite
AB The fluorine(F)rich nature in iron oxidecoppergold (IOCG) deposits has received much attention since it was recognized that the giant Olympic Dam (OD) deposit contains gt;2 wt% fluorite. Yet, the significance of the FUREEFe association remains poorly understood, with four existing hypotheses regarding the role of F: (i) fluoride increases the solubility of metals by forming stable
The formation of most fluorite deposits in northern Couila (NE Mexico) is explained by MVT models, and is a part of the metallogenic province of northeastern Mexico. However, fluorite skarn deposits also occur in the same region, and there is evidence for late hydrothermal manifestations with no clear origin and evolution. The latter are the main focus of this study; in particular, Famp;ndash
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In this district, the large Madiu fluorite deposit contains five Mesozoic granitehosted orebodies. The deposit may have formed at shallow depth and occurred as continuous veins controlled by a series of NS or NEtrending, steeply dipping faults. The fluorite mineralization can be divided into two stages (I
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