3 edition of Sphalerite geobarometry of some metamorphosed sulphide ore deposits in Finland found in the catalog.
Sphalerite geobarometry of some metamorphosed sulphide ore deposits in Finland
Bibliography: p. 39-42.
|Statement||by Ragnar Törnroos.|
|Series||Geological Survey of Finland, bulletin,, 323, Bulletin (Geologinen tutkimuslaitos (Finland)) ;, 323.|
|LC Classifications||QE390 .T67 1982|
|The Physical Object|
|Pagination||42 p. :|
|Number of Pages||42|
|LC Control Number||84127341|
As sphalerite is such a common constituent of many types of ore, the present investigation was undertaken to determine what its relations are to the other minerals in the deposits, and also whether these are of any genetic significance. The data presented herewith were obtained from a mineralographic study of about ore specimens from some 43 different localities, represented by suites of. Sphalerite Sphalerite is the major ore of zinc. It is a sulphide mineral and exhibits a wide range of physical properties, such as colour, transparency, streak and lustre, because many elements can substitute for Zn in its crystal structure. Iron is the principle substituent, but cadmium, gallium and iridium can also substitute to economic volumes making sphalerite the leading commercial.
The ore mineral assemblage in volcanogenic massive sulfide (VMS), Mississippi Valley type (MVT), and sedimentary exhalative (SEDEX) type deposits is typically dominated by some combination of pyrite, pyrrhotite, sphalerite, galena and chalcopyrite (in this section we use chemical formulae when discussing experiments and mineral names when. Concentrations of ore deposits of economic minerals can result from contact metamorphism as hot, ion-rich fluids migrate from igneous intrusions into the surrounding rock, producing rich ore deposits. The most common sulfide ore minerals associated with contact metamorphism are copper minerals such as chalcopyrite and bornite; galena (lead.
Metamorphic rocks and processes • Metamorphism comes from the Greek words “Meta” - change “Morphe” - form • Metamorphic rocks form by solid-state (no melting) transformation of preexisting rock by processes that take place beneath Earth’s surface. At both these deposits fine variably arsenean pyrite deposited as the ore fluid has rapidly cooled by contact with the wall rocks may display difficult metallurgy. The early low Au grade poor metallurgy sulphide breccias at Sleeper, Nevada are of this style. Much quartz-sulphide Au + Cu mineralisation occurs as small scale veins, reminiscent of.
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Sphalerite geobarometry of some metamorphosed sulphide ore deposits in Finland. Espoo: Geologinen tutkimuslaitos, (OCoLC) Document Type: Book: All Authors /. Indications of partial melting of sulphide ore are not always obvious (see Table 10), but its reality is very high for some high-grade metamorphosed VMS deposits of the Urals because evaluation of the peak metamorphism temperature by silicate minerals (Buslaev et al., a, Buslaev et al., b) indicates values between ° and °C Cited by: Metamorphosed massive sulfide deposits in the Swedish Caledonides were investigated using sphalerite geobarometry and arsenopyrite geothermometry.
The sphalerite investigations yield pressure estimates of 3 to 5 kb for six deposits from host rocks of greenschist-lower amphibolite by: Sphalerite is a common sulphide and is the dominant ore mineral in Zn-Pb sulphide deposits. Precise determination of minor and trace element concentrations in sulphides, including sphalerite, by.
Sphalerite Geothermometry and Geobarometry. Some Ore Textures Involving Sphalerite from the Furutobe Mine, Akita Prefecture, Japan ancient vein deposits and metamorphosed sulphide ores.
The types of mainly metallic mineralization found in metamorphic terranes are reviewed and an attempt is made to define the genetic relations between the mineralization and the metamorphic terms metamorphosed, metamorphic, and metamorphogenic as applied to ores are also development of thought and the history of investigations on ores in metamorphic terranes aretraced.
A general review is given of the effects of metamorphism on sulphide deposits, special emphasis being laid on deposits of the “Kieslagerstätten” type. A historical review is given of the development of concepts regarding sulphide ore metamorphism from the beginning of the century to the present day.
With increasing metamorphic grade sphalerite becomes more iron-rich, pyrrhotite becomes more abundant, and the sulphides show a general increase in grain-size which parallels that of the silicates in the enclosing rocks.
In the more highly metamorphosed deposits the sulphide associations are retrograde assemblages. Sphalerite is the major ore mineral in the Zn-rich, volcanic-hosted massive sulphide deposits of western Tasmania.
These deposits have been affected by regional metamorphism to upper greenschist facies, and associated tectonic deformation related to the Devonian Tabberabberan Orogeny. The southern end of the Rosebery deposit has undergone metasomatic replacement related to a post.
The average massive sulphide camp in Canada has about 9 deposits, but ranges from four (Manitowadge) to 21 (Noranda), However, an individual deposit may consist of a number of closely associated, discrete lenses ranging from several thousand to several million tons in size (ea. Millenbach Mine was 16 geologically discrete ore lenses).
Structural features of Precambrian, stratabound sulphide ore deposits of Finland, GEOL FÖREN STOCKHOLM FÖRH 99, – Gaál, G. Geological setting and intrusion tectonics of the Kotalahti nickel-copper deposit, Finland.
Sphalerite can be found in many ore veins of sulfide minerals, commonly associated with galena and pyrite. Miners call sphalerite "jack," "blackjack," or "zinc blende." Its impurities of gallium, indium and cadmium make sphalerite a major ore of those metals. Sphalerite has some.
Descriptions of major ore deposits world wide. The Hongtoushan Archaean Cu-Zn Volcanic hosted Massive Sulphide (VHMS) deposit is located in Liaoning Province, north-eastern China, (#Location: 42° 06' 00"N ° 29' 00"E).
Hongtoushan is the largest of the eight Archaean volcanic hosted massive sulphide Cu-Zn deposits in the Hunbei district, distributed over an arcuate belt of some 60x10 km. Purchase Fluid Inclusion Effect in Flotation of Sulfide Minerals - 1st Edition.
Print Book & E-Book. ISBNORE DEPOSITS, PETROLOGY, VOLCANOLOGY and applied topics on Environment, Archaeometrv and Cultural Heritage Geochemical features of the massive sulfide (Cu) metamorphosed deposit of Arinteiro (Galicia, Spain) and genetic implications SILVIA SERRANTII*, VINCENZO FERRINI2, UMBERTO MASI2, MASSIMO NICOLETTI) and LOUIS N.
CONDE4. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Sphalerite is the most thoroughly investigated of the refractory sulfides and has proven to be a useful geobarometer, particularly in regionally metamorphosed terrains. The concept of the sphalerite geobarometer derives from the variation of the FeS content of sphalerite as a function ofpressure, when the FeS activity.
Sphalerite (Zn,Fe)S c Mineral Data Publishing, version 1 Crystal Data: Cubic. Point Group: 43m. Crystals tetrahedral, dodecahedral, typically complex and distorted, curved and conical faces common, to 30 cm. Also ﬁbrous, botryoidal, stalactitic, cleavable, coarse to ﬁne granular, massive.
Twinning: Twin axis , twin plane. Abundant, micrometer-scale, spherical aggregates of 2- to 5-nanometer-diameter sphalerite (ZnS) particles formed within natural biofilms dominated by relatively aerotolerant sulfate-reducing bacteria of the family Desulfobacteriaceae.
The biofilm zinc concentration is about times that of associated groundwater ( to parts per million zinc). The Nayongzhi Zn-Pb deposit, located in the southeastern margin of the Sichuan-Yunnan-Guizhou (S-Y-G) Zn-Pb metallogenic province, China, has been recently discovered in this region and has an estimated resource of Mt of metal at average grades of wt % Zn and wt % Pb.
The ore bodies are hosted in the Lower Cambrian Qingxudong Formation dolostone and occur as stratiform, stratoid. Sphalerite is usually faceted in order to maximize its brilliance and can be seen in a variety of shapes, such as octagons, trillions, squares, rounds and fancy shapes, such as ovals, pears and cushions.
Sphalerite is a challenge to gem cutters because of its brittle tenacity, softness and perfect cleavage in six directions. Sphalerite Treatment.
Although they are a product of the same igneous system, low sulfidation epithermals gold deposits are very different from high sulfidation. In low sulfidation the main control for Gold deposition, is fluid boiling – caused by a drop in the confining pressures the fluid approaches the surface.
This below is an image of a simple low sulfidation vein system, with all its components preserved.Ore Deposit Geology John Ridley Mapping closely to how ore deposit geology is now taught, this textbook systematically describes and illustrates the major ore deposit types, linking this to their settings in the crust, and the geological factors behind their formation.Sphalerite geobarometry of some metamorphosed sulphide ore deposits in Finland Volyymi:Julkaisusarja: Geological Survey of Finland, Bulletin - Bulletin de la Commission Géologique de Finlande, Hinta: 5€.