Infobox mineral name Pyrrhotite category boxbgcolor image Pyrrhotite Mexique.jpg imagesize caption Pyrrhotite Santa Eulalia Mine Chihuahua Mexico 7,5x7cm formula Fe sub 1 x sub S x 0 to 0.2 strunz 02.CC.10 symmetry Monoclinic prismatic br H M symbol 2 m br Space group A2 a unit cell a 11.88 , b 6.87 , c 22.79 90.47 Z 26 molweight color Bronze, dark brown habit Tabular or prismatic in hexagonal prisms massive to granular system Monoclinic , with hexagonal polytypes twinning cleavage Absent fracture ... Webmineral data ref Pyrrhotite is an unusual iron sulfide mineral with a variable iron content Fe sub 1 x sub S x 0 to 0.2 . The FeS Endmember mineralogy endmember is known as troilite . Pyrrhotite ... and history The name pyrrhotite is derived from Greek pyrrhos , flame colored. ref name mindat cite web url http www.mindat.org min 3328.html publisher Mindat.org title Pyrrhotite accessdate 2009 ... pyrrhotite 1C Pyrrhotite has a number of polytypes of Hexagonal crystal system hexagonal or monoclinic ... is pyrrhotite 4C Fe sub 7 sub S sub 8 sub . Here 4 indicates that iron vacancies form ... to the largest lattice spacing. Other polytypes include pyrrhotite 5C Fe sub 9 sub S sub 10 sub ..., is non magnetic. The ferromagnetism which is widely observed in pyrrhotite is therefore attributed .... Vacancies lower the crystal symmetry. Therefore, monoclinic forms of pyrrhotite are in general ...&pg PA131 ref Upon heating to 320 C, pyrrhotite loses its magnetism, but also starts decomposing to magnetite . The saturation magnetization of pyrrhotite is 0.12 Tesla unit tesla . ref cite book ... of materials author Jan Svoboda publisher Springer year 2004 isbn 1402020384 ref Occurrence Pyrrhotite ... metamorphic rock metamorphic zones. Pyrrhotite is often accompanied by pyrite, marcasite and magnetite. Pyrrhotite does not have specific applications. It is mined primarily because it is associated ... eu Pirrotita fa fr Pyrrhotite it Pirrotite he lt Pirotinas nl Pyrrhotiet ja ... more details
Iron sulfide or Iron sulphide refers to a chemical compound of iron and sulfur with a wide range of stoechiometric formulae and different crystalline structures. Natural minerals By increasing order of stability Iron II sulfide , FeS, the less stable amorphous form Troilite , FeS, the end member of pyrrhotite Greigite , Fe sub 3 sub S sub 4 sub , analog to magnetite , Fe sub 3 sub O sub 4 sub Pyrrhotite , Fe sub 1 x sub S where x 0 to 0.2 , or Fe sub 7 sub S sub 8 sub Mackinawite , Fe sub 1 x sub S where x 0 to 0.1 Marcasite , or iron II disulfide, FeS sub 2 sub orthorhombic Pyrite , or iron II disulfide, FeS sub 2 sub cubic , the more stable end member. Artificial product Iron III sulfide , Fe sub 2 sub S sub 3 sub , a quite unstable artificial product synthesised at 20 C and not identified in nature. DEFAULTSORT Iron Sulfide Category Iron compounds Category Iron minerals Category Sulfur compounds Category Sulfides Category Sulfide minerals Category Non stoichiometric compounds es Sulfuro de hierro ru sr Gvo e sulfid ... more details
Uchucchacuaite silver Ag manganese Mn lead Pb sub 3 sub antimony Sb sub 5 sub sulfur S sub 12 sub is a rare sulfosalt mineral found in hydrothermal deposits. It was first described in 1984 for an occurrence in the Uchucchacua Mine, Oyon Province , Lima Department , Peru and named for the mine. ref name Mindat http www.mindat.org min 4075.html Mindat.org ref It has also been reported from mines in Hokkaido , Japan . ref name Mindat It occurs with alabandite , galena , benavidesite , sphalerite , pyrite , pyrrhotite and arsenopyrite in the Peru deposit. ref name HBM http rruff.geo.arizona.edu doclib hom uchucchacuaite.pdf Handbook of Mineralogy ref References Reflist http www.webmineral.com data Uchucchacuaite.shtml Webmineral Category Sulfosalt minerals sulfide mineral stub it Uchucchacuaite ... more details
in Cobalt, stated the closure of Northland was due to the mine transporting pyrrhotite instead of pyrite for three days. ref name XJP The mined pyrrhotite was said to be in a parallel lens to the mined ... more details
breithauptite. Associated minerals include arsenopyrite , barite , silver , cobaltite , pyrrhotite ... pyrrhotite assemblages within the Mariners, Redross and Miitel nickel mines where nickeline is produced ... nickel arsenide, Co,Ni As Nickeline nickel arsenide, NiAs Pyrrhotite iron sulfide Fe sub 1 x sub S Sederholmite ... more details
wiktionary CDT and CdT may refer to In medicine Carbohydrate deficient transferrin , a transporter protein isoform typically increased in alcoholism Compulsory drug test Current Dental Terminology , a coding system of the American Dental Association Cytolethal distending toxin , a bacterial genotoxin produced by Gram negative bacteria Organisations Canadian Deaf Theatre CD Tenerife Club Deportivo Tenerife , a Spanish football club Center for Democracy and Technology Centre for Doctoral Training or Doctoral Training Centre , a organisation of PhD programmes at UK universities China Datang Corporation , a power generation business in the People s Republic of China China Digital Times , a bilingual news website covering Chinese politics Clearance Diving Team RAN , a special forces unit of the Royal Australian Navy Cologne Domino Team, an association of some of Germany s best domino builders that holds a big event every summer. Conf d ration D mocratique du Travail Democratic Confederation of Labour DRC , a trade union in the Democratic Republic of the Congo Democratic Confederation of Labour Morocco , a trade union Crimson Dance Team, of Harvard College Translation Centre for the Bodies of the European Union Centre de Traduction des Organes de l Union Europ enne Other Ca on Diablo troilite pyrrhotite , a standard for comparing sulfur isotopes Causal dynamical triangulation , an approach to quantum gravity Causal decision theory , a school of thought within decision theory Central Daylight Time Australia Central Daylight Time, a Time in Australia time zone in Australia Central Daylight Time, observed in the Central Time Zone North America Centre Daily Times , a newspaper for Centre County, Pennsylvania Conceptual dependency theory Constrained Delaunay triangulation Continental Divide Trail Craft Design and Technology , a subject in the UK educational system Eclipse C C Development Toolkit, see Eclipse software disambig Category Initialisms de CDT fr CDT it CDT nl CDT ja ... more details
Infobox mineral name Akaganeite boxwidth boxbgcolor image Earth and Man Akaganeite.jpg imagesize alt caption A piece of the mineral akagan ite. Exhibit of the Earth and Man National Museum Earth and Man Museum in Sofia, Bulgaria. Discovered in Kaskasnyunchorr, Khibiny Massif , Kola Peninsula , Russia category Oxide mineral formula Fe sup 3 sup O OH,Cl strunz 04.DK.05 symmetry 2 m Prismatic unit cell a 10.561 , b 3.031 , c 10.483 90.63 molweight color Yellowish brown, rusty brown colour habit system Monoclinic twinning cleavage fracture tenacity mohs luster Earthy streak Brownish yellow diaphaneity Transparent, translucent gravity 3.52 density polish opticalprop refractive birefringence pleochroism 2V dispersion extinction length fast slow fluorescence absorption melt fusibility diagnostic solubility impurities alteration other prop1 prop1text references Akagan ite is an iron III oxide hydroxide chloride mineral with formula Fe sup 3 sup O OH,Cl e.g FeO OH . It is formed by the weathering of pyrrhotite Fe sub 1 x sub S . Nickel also has been reported in the structure. It has a monoclinic crystal structure , a metal lic Lustre mineralogy luster and a brownish yellow Mineral Streak streak . It is named after the Akagane mining mine in Iwate , Japan , in which it was discovered. It has also been found in widely dispersed locations around the world and in rocks from the Moon that were brought back during the Apollo Project . The occurrences in meteorite s and the lunar sample are thought to have been produced by interaction with Earth s atmosphere . References http www.mindat.org min 67.html Mindat with locations http webmineral.com data Akaganeite.shtml Webmineral http scienceworld.wolfram.com chemistry Akaganeite.html Weisstein Category Iron minerals Category Halide minerals Category Oxide minerals Category Monoclinic minerals Oxide mineral stub ca Akaganeita fr Akagan ite it Akaganeite lv Akagane ts ... more details
Polydymite , Ni sup 2 sup Ni sub 2 sub sup 3 sup S sub 4 sub , is a Supergene geology supergene Thiospinel group thiospinel sulfide mineral associated with the weathering of primary pentlandite nickel sulfide. Polydymite crystallises in the Cubic crystal system isometric system, with a hardness of 4.5 to 5.5 and a specific gravity of about 4, is dark violet gray to copper red, often with verdigris and patina from associated copper and arsenic sulfides, and is typically in amorphous to massive infill of lower saprolite ultramafic Lithology lithologies . Polydymite is the nickel equivalent of violarite and in many cases these two minerals are formed together, potentially in solid solution . Common contaminants of polydymite are cobalt and iron. Polydymite forms a series with linnaeite , Co sup 2 sup Co sup 3 sup sub 2 sub S sub 4 sub . ref http www.mindat.org min 8710.html Linnaeite Polydymite Series ref Paragenesis Polydymite is formed by oxidisation of primary sulfide assemblages in nickel sulfide mineralisation. The process of formation involves oxidation of Ni sup 2 sup and Fe sup 2 sup which is contained within the primary pentlandite pyrrhotite pyrite assemblage. Continued oxidation of polydymite leads to replacement by goethite and formation of a gossan ous boxwork, with nickel tending to remain as impurities within the goethite or hematite, or rarely as carbonate minerals. Occurrence Polydymite is reported widely from the oxidised regolith above primary nickel sulfide ore systems worldwide. It is less common than related violarite, due to the high iron content of most primary sulfides. Economic importance Polydymite is an important transitional ore in many nickel sulfide mines, as it has increased nickel tenor Ni as a total of sulfide and occupies a position within the mineralised profile where it must be extracted to pay for development down to the most valuable fresh mineralisation. References reflist http www.mindat.org min 3258.html Polydymite on Mindat.or ... more details
Infobox mineral name Mackinawite category Sulfide mineral boxwidth boxbgcolor image imagesize caption formula Fe,Ni sub 1 x sub S where x 0 to 0.11 strunz 02.CC.25 symmetry Tetragonal 4 m 2 m 2 m unit cell a 3.67 , c 5.03 Z 2 molweight 85.42 g color Bronze to white grey habit As well formed thin tabular crystals massive, fine feathery system Tetragonal ditetragonal dipyramidal twinning cleavage Perfect on 001 fracture tenacity mohs 2.5 luster Metallic polish refractive opticalprop birefringence dispersion pleochroism fluorescence absorption streak Black gravity 4.17 density melt fusibility diagnostic solubility diaphaneity Opaque other references ref name Handbook http rruff.geo.arizona.edu doclib hom mackinawite.pdf Handbook of Mineralogy ref ref http webmineral.com data Mackinawite.shtml Webmineral data ref ref name Mindat http www.mindat.org min 2512.html Mindat ref Mackinawite is an iron nickel sulfide mineral with formula Fe,Ni sub 1 x sub S where x 0 to 0.11 . It crystallizes in the tetragonal crystal system and occurs as opaque bronze to grey white tabular crystals and anhedral masses. It has a Mohs hardness of 2.5 and a specific gravity of 4.17. Occurrence It occurs in serpentinite serpentinized peridotite s as a hydrothermal alteration product. It also is found in the redox reducing environment of fine grained river sediments, possibly produced by the action of magnetotactic bacteria magnetotactic and sulfate reducing bacteria . It has also been reported from meteorite occurrences. It occurs in association with chalcopyrite , cubanite , pentlandite , pyrrhotite , greigite , maucherite and troilite . ref name Handbook It was first described in 1962 for an occurrence in the Mackinaw mine, Snohomish County, Washington for which it was named. ref name Mindat References Reflist Category Sulfide minerals Category Meteorite minerals sulfide mineral stub de Mackinawit it Mackinawite he ... more details
coord 43.8128532 72.335100 display title Infobox superfund name Elizabeth Mine image town Strafford, Vermont Strafford county Orange County, Vermont Orange County state Vermont map location map Vermont caption lat 43.8128532 long 72.335100 width 150 CERCLIS ID VTD988366621 contaminants Mine tailings, metals, sulfides. responsible proposed 12 01 2000 listed 06 14 2001 construction partial del deleted The Elizabeth Mine was a copper mine located in Orange County, Vermont , some miles south of the town of Strafford, Vermont Strafford . The ore deposit was discovered in 1793, but mining did not start until 1809. Open pit mining and from 1886 underground mining was conducted. The mine produced up to 8,500,000 lbs. of copper 1954 and was closed in 1957. Due to acid mine drainage the west branch of the Ompompanoosuc River was polluted. Since 2000 the United States Environmental Protection Agency Environmental Protection Agency EPA and the Vermont Agency of Natural Resources have been developing a plan to clean up the area. Geology The ore deposits at the Elizabeth Mine are hosted in the strongly deformed Devonian Guile Mountain Formation a grey to dark grey mica schist . Ore deposits are localized in zones of high permeability associated with deformation that occurred during the Acadian Orogeny . The ore body is principally a massive sulfide deposit consisting primarily of pyrrhotite and chalcopyrite . See also Copper mining in the United States List of Superfund sites in Vermont External links http www.vermonthistory.org journal 70 vt703 404.pdf South Strafford s Elizabeth Copper Mine The Tyson Years, 1880 1902 http www.uvm.edu envprog formslinks Vermont 20Mining Copper.html Vermont Mining http www.anr.state.vt.us dec geo pdfdocs elizabethminebull.pdf The Geology of the Elizabeth Mine, Peter Howard, 1969 http www.anr.state.vt.us dec geo elizimages elizpa1small.jpg Geologic Map of the Elizabeth Mine Area Stratford, VT Category Geology of Vermont Category Copper mines in th ... more details
The Lac des les igneous complex of northwestern Ontario , Canada is a layered intrusion layered gabbroic intrusion which is the host for the largest palladium orebody in Canada. ref name Infomine http www.infomine.com minesite minesite.asp?site lacdesiles Infomine report on Lac des les ref The orebody is currently being mined as a combined open pit and underground operation by North American Palladium . ref name Infomine The complex is located in the Canadian Shield some 85 kilometers northwest of Thunder Bay , Ontario and Lake Superior at 49.10.00 N 089.36.00 W. ref name GSC http www4.geology.utoronto.ca faculty mungall Website igcp479namerica dp512.html Geological Survey of Canada, World Minerals Geoscience Database Project, Entry 512 ref The complex includes gabbro , pyroxenite , Norite gabbronorite and websterite intrusive into granitic gneiss country rock. The ore minerals occur within gabbroic pegmatite s and gabbro breccia zones. The Archean complex has been dated at 2738 27 Ma by Samarium neodymium dating Sm Nd dating on pyroxenite. ref name GSC The Roby Zone orebody of the complex is a platinum group elements PGE deposit with associated gold, copper and nickel mineralization. Ore mineralogy includes pyrrhotite , pentlandite , chalcopyrite , pyrite and the rare PGE minerals vysotskite Pd,Ni S, braggite Pt,Pd,Ni S, kotulskite Pd Te,Bi sub 1 2 sub , isomertieite Pd sub 11 sub Sb sub 2 sub As sub 2 sub , merenskyite Pd,Pt Te,Bi sub 2 sub , sperrylite PtAs sub 2 sub and moncheite Pt,Pd Te,Bi sub 2 sub . ref name GSC ref http www.mindat.org loc 43996.html Mindat ref See also Portal Volcanism of Canada Volcanism of Canada Volcanism of Eastern Canada References Reflist coord missing Ontario DEFAULTSORT Lac Des Iles Igneous Complex Category Volcanism of Ontario Category Economic geology Category Palladium Category Archean volcanism Category Layered intrusions Canada geology stub NorthernOntario geo stub ... more details
black minerals like magnetite and pyrrhotite . At some places white, water bearing carbonate s and sulfate .... pyrrhotite . cubanite . Intergrown with pyrrhotite. pentlandite . troilite . Water bearing ... is present with 25 weight , but mainly in oxidation oxidised form magnetite . Iron sulfides like pyrrhotite ... more details
. Its unit cell is approximately a combination of two vertically stacked basic NiAs type cells of pyrrhotite ... called pyrrhotite 2C. ref name structure cite book pages 382 390 url http books.google.com ... it is associated with copper, nickel iron ore deposits occurring with pyrrhotite, pentlandite , mackinawite ... encountered in the Earth s crust. Even pyrrhotite is relatively rare compared to pyrite and Iron ... more details
of pentlandite, pyrite and pyrrhotite , and usually containing a small percentage of chalcopyrite Copper ... , Canada , is associated with a meteorite impact crater. Pentlandite pyrite pyrrhotite ore in this location ... Geology, 76, 1330 1363. Thornber, M. R. 1972 Pyrrhotite the matrix of nickel sulphide mineralization ... more details
hydrothermal Vein geology veins . Commonly associated minerals include pyrite , pyrrhotite , galena ... such as pyrrhotite or chalcopyrite . Alteration Marcasite reacts more readily than pyrite under conditions ... more details
as ore minerals along with common accessories pyrite , pyrrhotite , quartz , Carbonate mineral ... Copper occurs in brecciated silica dolomite rock. Primary minerals are chalcopyrite, pyrrhotite and arsenopyrite ... more details
Image Panasqueira Fluorapatite Ferberite.jpg thumb upright Fluorapatite on ferberite , Minas da Panasqueira, Level 3, Beira Baixa, Portugal 2002 Panasqueira is one of the largest tungsten mines in the world. It is located in Covilh , Castelo Branco, Portugal Castelo Branco , Portugal . Geology The deposit is located in a region in which Precambrian shale , greywacke and sandstone units were intruded by the Panasquieira Granite. Contact metamorphism adjacent to the granite converted the shale into hornfels consisting of biotite , cordierite and andalusite . Quartz veins and masses were produced by regional metamorphism during the Hercynian orogeny . The upper part of the leucogranite batholith is associated with massive quartz greisen and veins within the hornfels and shale. Mineralisation in the deposit includes an oxide silicate stage consisting of wolframite , cassiterite , arsenopyrite , topaz , muscovite and tourmaline . This was followed by sulfide mineralisation consisting of further arsenopyrite, pyrite , pyrrhotite , chalcopyrite , sphalerite and stannite . A late stage of calcite and dolomite with minor sulfide minerals ended the mineralisation event. ref name Mindat http www.mindat.org loc 2591.html Panasquieira at Mindat.org ref Mineral specimens This classic locality has for over 100 years produced fine collector specimens. These include exceptional specimens of fluorapatite , ferberite , arsenopyrite , siderite , quartz and numerous other species such as chalcopyrite , sphalerite , dolomite , calcite , mica , tourmaline , fluorite and topaz . It has also produced some very rare minerals and is the Type locality geology type locality for panasqueiraite and thadeuite . ref name Mindat For many years the sale of mineral specimens from the mine was forbidden, as tungsten was a strategic mineral. Quite a few years ago, and at the same time as Portugal began to change after its entry into the European Union , things began to become easier. However, unfortunat ... more details
Infobox mineral name Glaucodot category mineral boxwidth boxbgcolor image Glaucodot 169959.jpg caption Glaucodot from H kansboda, Lindesberg , Sweden. Size 3.3 x 2.7 x 2.6 cm. formula Co,Fe AsS Co sub 0.75 sub Fe sup 2 sub sub 0.25 sub AsS molweight 165.15 strunz 02.EB.10c color Grayish tin white, Reddish silver white habit Massive Uniformly indistinguishable crystals forming large masses. system Orthorhombic 2 m 2 m 2 m Space Group C mmm twinning cleavage None fracture Brittle Uneven Very brittle fracture producing uneven fragments. mohs 5 luster Metallic refractive fluorescence inert opticalprop birefringence pleochroism streak black gravity 5.9 6.01, Average 5.95 melt fusibility diagnostic solubility diaphaneity other Nonmagnetic, non radioactive Glaucodot is a cobalt iron arsenic sulfide mineral with formula Co,Fe AsS. The cobalt iron II ratio is typically 3 1 with minor nickel substituting. It forms a series with arsenopyrite FeAsS . It is an opaque grey to tin white typically found as massive forms without external crystal form. It crystallizes in the orthorhombic system. The locality at H kansboda, Sweden has rare Crystal twinning twinned dipyramidal crystals see photo . It is brittle with a Mohs hardness of 5 and a specific gravity of 5.95. It occurs in high temperature hydrothermal deposits with pyrrhotite and chalcopyrite . Glaucodot is classed as a sulfide in the arsenopyrite l llingite group. Glaucodot was first described in 1849 in Huasco, Valpara so Province , Chile . Its name originates from the Greek blue in reference to its use in the dark blue glass called smalt . References http webmineral.com data Glaucodot.shtml Webmineral Glaucodot http www.mindat.org min 1709.html Mindat with location data http www.geology.neab.net minerals glaucodo.htm Scandinavian mineral gallery Hurlbut, Cornelius S. Klein, Cornelis, 1985, Manual of Mineralogy , 20th ed., p. 288, ISBN 0 471 80580 7 Commons category Glaucodot position left Category Cobalt minera ... more details
Infobox mineral name Zaratite boxwidth boxbgcolor image Zaratite Hydrous basic nickel carbonate Lor Brassey mine Heeazlewood Tasmania 1966.jpg imagesize alt caption Zaratite from Tasmania category Carbonates formula Ni sub 3 sub CO sub 3 sub OH sub 4 sub · 4H sub 2 sub O strunz 05.DA.70 dana symmetry unit cell molweight color colour habit system twinning cleavage fracture tenacity mohs luster streak diaphaneity gravity density polish opticalprop refractive birefringence pleochroism 2V dispersion extinction length fast slow fluorescence absorption melt fusibility diagnostic solubility impurities alteration other prop1 prop1text references Zaratite is a bright emerald green nickel Carbonate minerals carbonate mineral with formula nickel Ni sub 3 sub carbon C oxygen O sub 3 sub O hydrogen H sub 4 sub · 4 water H sub 2 sub O . Zaratite crystallizes in the Cubic crystal system isometric crystal system as massive to mammillary encrustations and vein fillings. It has a specific gravity of 2.6 and a Mohs hardness of 3 to 3.5. It has no Cleavage crystal cleavage and is brittle to conchoidal fracture . The Lustre mineralogy luster is vitreous to greasy. It is a rare secondary mineral formed by hydration or alteration of the primary nickel and iron bearing minerals, chromite , pentlandite , pyrrhotite , and millerite , during the serpentinization of ultramafic rocks. Hellyerite , NiCO sub 3 sub · 6H sub 2 sub O, is a related mineral. It was found originally in Galicia Spain Galicia , Spain in 1851, and named after Spanish diplomat and dramatist Antonio Gil y Zarate 1793 1861 . See also Nickel II carbonate List of minerals List of minerals named after people References http rruff.geo.arizona.edu doclib hom zaratite.pdf Mineral Data Publishing, PDF http webmineral.com data Zaratite.shtml Webmineral data http www.mindat.org min 4388.html Mindat with location data Category Nickel minerals Category Carbonate minerals Carbonate mineral stub ca Zaratita fa i ... more details
. Best known perhaps is iron II sulfide mineral pyrrhotite with a composition Fe sub 1 x sub S x 0 to 0.2 . The rare stoichiometric FeS Endmember mineralogy endmember is known as mineral Pyrrhotite troilite . Pyrrhotite is remarkable in that it has numerous polytypes , i.e. crystalline forms ... certain regular configurations. Those vacancies strongly affect the magnetic properties of pyrrhotite ... more details
infobox mineral name Evenkite boxwidth boxbgcolor image Mineraly.sk evenkit.jpg imagesize alt caption category Organic mineral formula C sub 24 sub H sub 50 sub strunz 10.BA.50 dana symmetry Orthorhombic dipyramidal br H M symbol 2 m 2 m 2 m br Space group Pbcm unit cell a 7.47 , b 4.98 , c 65.85 Z 4 molweight color Colorless or pale yellow colour habit Tabular pseudohexagonal crystals, granular, disseminated system Orthorhombic twinning Polysynthetic cleavage 001 Perfect fracture tenacity mohs 1 luster Waxy streak diaphaneity Transparent gravity 0.87 density polish opticalprop Biaxial refractive n sub sub 1.504 n sub sub 1.504 n sub sub 1.553 birefringence 0.049 pleochroism 2V dispersion extinction length fast slow fluorescence absorption melt fusibility diagnostic solubility impurities alteration other prop1 prop1text references ref name Mindat http www.mindat.org min 1428.html Mindat.org ref ref name Webmin http webmineral.com data Evenkite.shtml Webmineral data ref ref name HBM http rruff.geo.arizona.edu doclib hom evenkite.pdf Handbook of Mineralogy ref Evenkite is a rare hydrocarbon mineral with formula CH sub 3 sub sub 2 sub CH sub 2 sub sub 22 sub or C sub 24 sub H sub 50 sub . Chemically it is n tetracosane . It was first described in 1953 for the occurrence in the Khavokiperskiye deposit, Lower Tunguska River, Evenkia district, Siberia, Russia, where it occurs in vug s within a quartz Vein geology vein in welded tuff . Associated minerals include quartz, chalcedony , pyrite , pyrrhotite , sphalerite , galena , chalcopyrite and calcite . ref name HBM It was named for the Evenkia district. ref name Webmin It has also been reported from the Hautes Alpes region of France and the Slansk and Vihorlat mountains of Slovakia . ref name Mindat References Reflist Commons category Evenkite position left Category Organic minerals Category Monoclinic minerals mineral stub de Evenkit es Evenkita it Evenkite nl Evenkiet sk Evenkit ... more details
Image Callander Bay satellite.jpg thumb right 230px Satellite image of Callander Bay Image Callander Bay.jpg thumb 230px right Callander Bay Callander Bay is a bay at the extreme east of Lake Nipissing in Parry Sound District, Ontario Parry Sound District , Ontario , Canada . It is convert 3 km mi 1 in diameter and the main community of Callander, Ontario Callander is located on its east side. Geology Callander Bay is an erosion eroded Proterozoic volcanic pipe ref cite web title Background Geology of the North Bay area url http home.cogeco.ca nananne backgroundgeology 070211 BackgroundGeology w.html accessdate 2007 09 24 ref formed by the violent, supersonic eruption of a deep origin volcano . These volcanoes originate at least three times as deep as most other volcanoes, and the resulting magma that is pushed toward the surface is high in magnesium and Volatiles volatile compounds such as water and carbon dioxide . As the body of magma rises toward the surface, the volatile compounds phase transformation transform to gas gaseous phase as pressure is reduced with decreasing depth. This sudden expansion propels the magma upward at rapid speeds, resulting in a shallow supersonic eruption. Callander Bay contains nepheline syenite s, carbonatite , aegirine , amphibole , analcime , apatite , barite , biotite , calcite , cancrinite , chalcopyrite , chlorite , diopside , dolomite , fluorite , garnet , hematite , kaersutite , magnetite , muscovite , nepheline , olivine , perthite , pyrite , pyroxene and pyrrhotite . ref cite web title Other localities Canada url http www.koeln.netsurf.de w.steffens can.htm accessdate 2007 09 28 Site information taken from cite book title Alkaline rocks and carbonatites of the world. Part 1, North and South America last Woolley first Alan R year 1987 publisher Natural History Museum British Museum Natural History location London isbn 9780565009717 oclc 220114352 ref See also Portal Volcanism of Canada Volcanism of Canada Volcanism of Easter ... more details
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