[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:470904":3},{"id":4,"longid":5,"guid":6,"name":7,"shortcode_ima":6,"entrytype":8,"entrytype_text":9,"varietyof":10,"synid":6,"polytypeof":6,"groupid":6,"weighting":11,"nolocadd":12,"blacklisted":12,"mindat_formula":6,"mindat_formula_note":6,"ima_formula":6,"elements":13,"sigelements":18,"key_elements":6,"impurities":6,"cim":6,"ima_status":6,"ima_notes":6,"ima_history":6,"approval_year":6,"publication_year":6,"discovery_year":6,"strunz10ed1":19,"strunz10ed2":19,"strunz10ed3":19,"strunz10ed4":6,"dana8ed1":6,"dana8ed2":6,"dana8ed3":6,"dana8ed4":6,"csystem":6,"cclass":6,"spacegroup":6,"spacegroupset":19,"a":6,"b":6,"c":6,"alpha":6,"beta":6,"gamma":6,"aerror":6,"berror":6,"cerror":6,"alphaerror":6,"betaerror":6,"gammaerror":6,"va3":6,"z":6,"csmetamict":12,"commentcrystal":6,"twinning":6,"tranglide":6,"parting":6,"epitaxidescription":6,"morphology":6,"tlform":6,"hmin":6,"hmax":6,"hardtype":6,"vhnmin":6,"vhnmax":6,"vhnerror":6,"vhng":6,"vhns":6,"commenthard":6,"dmeas":6,"dmeas2":6,"dcalc":6,"dmeaserror":6,"dcalcerror":6,"commentdense":6,"lustre":6,"lustretype":6,"commentluster":6,"diapheny":6,"streak":6,"colour":6,"commentcolor":6,"colors":6,"streak_colors":6,"luminescence":6,"uv":6,"cleavage":6,"cleavagetype":6,"fracturetype":6,"tenacity":6,"commentbreak":6,"opticaltype":6,"opticalsign":6,"opticalalpha":6,"opticalalpha2":6,"opticalalphaerror":6,"opticalbeta":6,"opticalbeta2":6,"opticalbetaerror":6,"opticalgamma":6,"opticalgamma2":6,"opticalgammaerror":6,"opticalomega":6,"opticalomega2":6,"opticalomegaerror":6,"opticalepsilon":6,"opticalepsilon2":6,"opticalepsilonerror":6,"opticaln":6,"opticaln2":6,"opticalnerror":6,"optical2vcalc":6,"optical2vcalc2":6,"optical2vcalcerror":6,"optical2vmeasured":6,"optical2vmeasured2":6,"optical2vmeasurederror":6,"rimin":6,"rimax":6,"opticaldispersion":6,"opticalpleochroism":6,"opticalpleochorismdesc":6,"opticalbirefringence":6,"opticalcomments":6,"opticalcolour":6,"opticalinternal":6,"opticaltropic":6,"opticalanisotropism":6,"opticalbireflectance":6,"opticalextinction":6,"opticalr":6,"specdispm":6,"ir":6,"electrical":6,"magnetism":6,"thermalbehaviour":6,"other":6,"industrial":6,"occurrence":6,"otheroccurrence":6,"type_specimen_store":6,"description_short":6,"aboutname":6,"rock_parent":6,"rock_parent2":6,"rock_root":20,"rock_bgs_code":6,"meteoritical_code":6,"updttime":21,"reviewed_at":6,"variety_of":22,"varieties":30,"group_members":31,"associates":32,"confused_with":33,"type_localities":34,"occurrence_total":35,"citations":36,"images":40,"structures":96,"synonyms":97,"language_names":99,"wikidata_qid":6,"texts":100},470904,"1:1:470904:2",null,"Chrysotile asbestos",2,"variety",975,132,false,[14,15,16,17],"Mg","Si","O","H",[14,15,16,17],"0",0,"2025-08-11 12:15:25",{"id":10,"name":23,"entrytype":20,"csystem":24,"ima_formula":25,"mindat_formula":26,"hmin":27,"hmax":27,"dmeas":19,"dcalc":19,"strunz10ed1":28,"primary_image_id":29},"Chrysotile","Monoclinic","Mg\u003Csub>3\u003C\u002Fsub>Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>5\u003C\u002Fsub>(OH)\u003Csub>4\u003C\u002Fsub>","Mg\u003Csub>3\u003C\u002Fsub>(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>5\u003C\u002Fsub>)(OH)\u003Csub>4\u003C\u002Fsub>",2.5,"9",5708,[],[],[],[],[],6,[37],{"id":38,"year":6,"html":39,"doi":6},16910709,"NOHSC (2005) CODE OF PRACTICE FOR THE MANAGEMENT AND CONTROL OF ASBESTOS IN WORKPLACES [NOHSC: 2018 (2005)] NATIONAL OCCUPATIONAL HEALTH AND SAFETY COMMISSION. Aust. Govt. Printing service, Canberra.",[41,51,58,66,74,79,86],{"id":42,"source_url":43,"license_code":44,"credit_html":45,"title":46,"description":47,"author":48,"original_width":49,"original_height":50},5711,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84626741","CC BY 2.0","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84626741\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Chrysotile asbestos veins in serpentinized komatiite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 1 (46971714425).jpg","\u003Cp>Chrysotile asbestos veins in serpentinized komatiite in the Precambrian of Ontario, Canada.\n\u003C\u002Fp>\u003Cp>Komatiites are very rare, magnesium-rich, extrusive, ultramafic igneous rocks.  They are named after the Komati River Valley in South Africa, the type locality.  Komatiite is an exceedingly rare type of lava.  No volcano on Earth erupts this material today.  Komatiites are essentially restricted to the Archean (4.55 to 2.5 billion years ago).  Experimental evidence has shown that komatiite lavas, when originally erupted, were considerably hotter (~1600º C) than any modern lava type on Earth.  This indicates that Earth’s mantle was much hotter than now.  Other geologic evidence also indicates that early Earth’s heat flux was much higher than today’s.\n\u003C\u002Fp>\u003Cp>Komatiite lava had a very low viscosity - it could flow like an ultradense gas.  This property permitted the solidification of some individual lava flows that are only 1 cm thick.\n\u003C\u002Fp>\u003Cp>The classic texture of komatiites is spinifex texture, named after clumps of long, spiky (& painful!) grasses.  Komatiites with spinifex texture have short to long blades or plates of olivine mixed with smaller-scale blades of pyroxene.\n\u003C\u002Fp>\u003Cp>All Archean komatiites are metamorphosed - the original igneous mineralogy (olivine, pyroxene, minor chromite, etc.) is gone to mostly gone.  Such rocks are best termed metakomatiites, but the prefix “meta-” is usually not specified in writing.\n\u003C\u002Fp>\u003Cp>Komatiites have economic significance, as many are closely associated with copper-nickel minerals (chalcopyrite & pentlandite), plus minor platinum-group elements, arsenides, bismuthides, and maybe a little gold and silver.  Komatiites are a world-class source of nickel in Canada and Western Australia.\n\u003C\u002Fp>\u003Cp>The outcrop seen here is part of a komatiite \"lava lake\" next to the Potter Mine in Ontario, Canada.  This is near the world-famous Pyke Hill locality, which has numerous, thin komatiite lava flows.  The rocks in the Potter Mine-Pyke Hill area are part of the Kidd-Munro Assemblage, which consists of ultramafic and mafic volcanic rocks intruded by mafic to ultramafic dikes and sill-like bodies.  Minor felsic volcanic rocks are also present.  Volcanogenic massive sulfide deposits occur in the Kidd-Munro Assemblage - they have been mined at the Texas Gulf Mine and the Potter Mine.\n\u003C\u002Fp>\u003Cp>The rocks at this particular site were originally interpreted as part of a relatively thick komatiite lava lake, the last feature of a volcanic eruption.  A newer interpretation says that this is a series of thick komatiite sheet flows (at least 6) in a paleo-depression.  A thin lava lake may have originally capped the succession.\n\u003C\u002Fp>\u003Cp>This is an exposure of serpentinized komatiite.  The light-colored linear features running through the rock are \"veins\" of asbestos.  There are several minerals colloquially known as \"asbestos\".  The most common is \"white asbestos\", which is a mineral called chrysotile.  It is one of three polymorphs of serpentine (= magnesium hydroxy-silicate, Mg3Si2O5(OH)4).  Other varieties include “blue asbestos” (= crocidolite amphibole) and “brown asbestos” (= amosite amphibole).  Chrysotile serpentine has a whitish to greenish color, a silky luster, and fibrous fracture.\n\u003C\u002Fp>\u003Cp>Stratigraphy: Upper Komatiitic Unit, Kidd-Munro Assemblage, Abitibi Greenstone Belt, lower Neoarchean, 2.711-2.717 Ga\n\u003C\u002Fp>\u003Cp>Locality: \"Lava Lake\" exposure outcrop near dirt road, southwest of the Potter Mine, north of Route 101, east-northeast of Matheson & south of the western end of Lake Abitibi & ~83 kilometers east of the city of Timmins, Munro Township, southern Cochrane District, eastern Ontario, southeastern Canada (~vicinity of 48° 35' 50.93\" North latitude, 80° 12' 50.97\" West longitude)\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>For photos of chrysotile serpentine\u002Fwhite asbestos, see:\n<a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"http:\u002F\u002Fwww.jsjgeology.net\u002FSerpentine.htm\">http:\u002F\u002Fwww.jsjgeology.net\u002FSerpentine.htm\u003C\u002Fa>\" rel=\"noreferrer nofollow\">www.jsjgeology.net\u002FSerpentine.htm<\u002Fa>\nand\n\u003C\u002Fp>\n<a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"https:\u002F\u002Fwww.mindat.org\u002Fgallery.php?min=975\">https:\u002F\u002Fwww.mindat.org\u002Fgallery.php?min=975\u003C\u002Fa>\" rel=\"noreferrer nofollow\">www.mindat.org\u002Fgallery.php?min=975<\u002Fa>","James St. John",3980,2013,{"id":52,"source_url":53,"license_code":44,"credit_html":54,"title":55,"description":47,"author":48,"original_width":56,"original_height":57},5712,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84626744","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84626744\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Chrysotile asbestos veins in serpentinized komatiite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 2 (47098470834).jpg",3915,1467,{"id":59,"source_url":60,"license_code":44,"credit_html":61,"title":62,"description":63,"author":48,"original_width":64,"original_height":65},5714,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=129051956","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=129051956\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Chrysotile asbestos vein sinuosity 21.jpg","The Deer Lake Peridotite (aka Deer Lake Complex) is a metamorphosed peridotite sill complex in the Precambrian-aged Ishpeming Greenstone Belt of Michigan's Upper Peninsula (UP), USA. The metamorphism has converted the original peridotite (probably dunite or close to it) into serpentinite. Good exposures can be seen next to Co. Rd. 573, along the western side of Deer Lake, northwest of the town of Ishpeming (see map). Freshly broken surfaces of serpentinized Deer Lake Peridotite from here can be wonderfully bluish-green. A slight but noticeable tug can be felt when a magnet is placed next to these rocks. Many serpentinites have a minor component of magnetite (a chemical consequence of peridotite metamorphism). The rocks shown can be slightly magnetic, despite the absence of visible magnetite crystals.\n\u003Cp>The serpentinites along the western side of Deer Lake often have thin veins of chrysotile asbestos, one of the varieties of the mineral serpentine. Older references indicate that pillow basalts are present at the Deer Lake West locality. More recently published references interpret the pillow basalt-like structures in the serpentinite as shear polyhedra or contraction joints in a shallowly-emplaced sill. Examination of the \"pillow\" structures in summer 2010 revealed that they are simply the result of sinuosity of asbestos (chrysotile) veins.\n\u003C\u002Fp>\nAge: late Neoarchean?, ~2.5-2.7 billion years.",3008,2000,{"id":67,"source_url":68,"license_code":44,"credit_html":69,"title":70,"description":71,"author":48,"original_width":72,"original_height":73},10527,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84626755","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84626755\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Chrysotile asbestos veins in serpentinized komatiite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 7 (47098435004).jpg","\u003Cp>Chrysotile asbestos veins in serpentinized komatiite in the Precambrian of Ontario, Canada.\n\u003C\u002Fp>\u003Cp>Komatiites are very rare, magnesium-rich, extrusive, ultramafic igneous rocks.  They are named after the Komati River Valley in South Africa, the type locality.  Komatiite is an exceedingly rare type of lava.  No volcano on Earth erupts this material today.  Komatiites are essentially restricted to the Archean (4.55 to 2.5 billion years ago).  Experimental evidence has shown that komatiite lavas, when originally erupted, were considerably hotter (~1600º C) than any modern lava type on Earth.  This indicates that Earth’s mantle was much hotter than now.  Other geologic evidence also indicates that early Earth’s heat flux was much higher than today’s.\n\u003C\u002Fp>\u003Cp>Komatiite lava had a very low viscosity - it could flow like an ultradense gas.  This property permitted the solidification of some individual lava flows that are only 1 cm thick.\n\u003C\u002Fp>\u003Cp>The classic texture of komatiites is spinifex texture, named after clumps of long, spiky (& painful!) grasses.  Komatiites with spinifex texture have short to long blades or plates of olivine mixed with smaller-scale blades of pyroxene.\n\u003C\u002Fp>\u003Cp>All Archean komatiites are metamorphosed - the original igneous mineralogy (olivine, pyroxene, minor chromite, etc.) is gone to mostly gone.  Such rocks are best termed metakomatiites, but the prefix “meta-” is usually not specified in writing.\n\u003C\u002Fp>\u003Cp>Komatiites have economic significance, as many are closely associated with copper-nickel minerals (chalcopyrite & pentlandite), plus minor platinum-group elements, arsenides, bismuthides, and maybe a little gold and silver.  Komatiites are a world-class source of nickel in Canada and Western Australia.\n\u003C\u002Fp>\u003Cp>The outcrop seen here is part of a komatiite \"lava lake\" next to the Potter Mine in Ontario, Canada.  This is near the world-famous Pyke Hill locality, which has numerous, thin komatiite lava flows.  The rocks in the Potter Mine-Pyke Hill area are part of the Kidd-Munro Assemblage, which consists of ultramafic and mafic volcanic rocks intruded by mafic to ultramafic dikes and sill-like bodies.  Minor felsic volcanic rocks are also present.  Volcanogenic massive sulfide deposits occur in the Kidd-Munro Assemblage - they have been mined at the Texas Gulf Mine and the Potter Mine.\n\u003C\u002Fp>\u003Cp>The rocks at this particular site were originally interpreted as part of a relatively thick komatiite lava lake, the last feature of a volcanic eruption.  A newer interpretation says that this is a series of thick komatiite sheet flows (at least 6) in a paleo-depression.  A thin lava lake may have originally capped the succession.\n\u003C\u002Fp>\u003Cp>This is an exposure of serpentinized komatiite.  The linear features running through the rock are \"veins\" of asbestos.  There are several minerals colloquially known as \"asbestos\".  The most common is \"white asbestos\", which is a mineral called chrysotile.  It is one of three polymorphs of serpentine (= magnesium hydroxy-silicate, Mg3Si2O5(OH)4).  Other varieties include “blue asbestos” (= crocidolite amphibole) and “brown asbestos” (= amosite amphibole).  Chrysotile serpentine has a whitish to greenish color, a silky luster, and fibrous fracture.\n\u003C\u002Fp>\u003Cp>Stratigraphy: Upper Komatiitic Unit, Kidd-Munro Assemblage, Abitibi Greenstone Belt, lower Neoarchean, 2.711-2.717 Ga\n\u003C\u002Fp>\u003Cp>Locality: \"Lava Lake\" exposure outcrop near dirt road, southwest of the Potter Mine, north of Route 101, east-northeast of Matheson & south of the western end of Lake Abitibi & ~83 kilometers east of the city of Timmins, Munro Township, southern Cochrane District, eastern Ontario, southeastern Canada (~vicinity of 48° 35' 50.93\" North latitude, 80° 12' 50.97\" West longitude)\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>For photos of chrysotile serpentine\u002Fwhite asbestos, see:\n<a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"http:\u002F\u002Fwww.jsjgeology.net\u002FSerpentine.htm\">http:\u002F\u002Fwww.jsjgeology.net\u002FSerpentine.htm\u003C\u002Fa>\" rel=\"noreferrer nofollow\">www.jsjgeology.net\u002FSerpentine.htm<\u002Fa>\nand\n\u003C\u002Fp>\n<a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"https:\u002F\u002Fwww.mindat.org\u002Fgallery.php?min=975\">https:\u002F\u002Fwww.mindat.org\u002Fgallery.php?min=975\u003C\u002Fa>\" rel=\"noreferrer nofollow\">www.mindat.org\u002Fgallery.php?min=975<\u002Fa>",4000,3000,{"id":75,"source_url":76,"license_code":44,"credit_html":77,"title":78,"description":47,"author":48,"original_width":72,"original_height":73},32701,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84626751","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84626751\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Chrysotile asbestos veins in serpentinized komatiite (Upper Komatiitic Unit, Kidd-Munro Assemblage, Neoarchean, 2.711-2.717 Ga; southwest of the Potter Mine, east of Timmins, Ontario, Canada) 5 (47835838352).jpg",{"id":80,"source_url":81,"license_code":82,"credit_html":83,"title":23,"description":6,"author":6,"original_width":84,"original_height":85},87985,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F128032","CC BY-SA 4.0","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby-sa\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F128032\" rel=\"noopener\">University of Tartu, Natural History Museum\u003C\u002Fa> via Europeana",1000,886,{"id":87,"source_url":88,"license_code":89,"credit_html":90,"title":91,"description":92,"author":93,"original_width":94,"original_height":95},49265,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=6607105","CC BY-SA 3.0","Ra'ike (see also: de:Benutzer:Ra'ike), via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=6607105\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Chrysotilasbest aus serpentiniertem Dolomit - Farm Rietfontein, Carolina, Transvaal.JPG","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FChrysotile\" class=\"extiw\" title=\"en:Chrysotile\">Chrysotil\u003C\u002Fa> asbestos out of serpentinized Dolomite - Locality: Farm Rietfontein, Carolina, Transvaal - Exposed in the Mineralogical Museum, Bonn, Germany","Ra'ike (see also: de:Benutzer:Ra'ike)",2800,2080,[],[98],"Chrysotilasbest",[],{"history":6,"applications":6}]