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Topic: Skarn

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	Skarn
		Skarns in the igneous environment are associated with hornfels, marble hornfels and wider zones of calc-silicate rocks.
		Because skarns are formed from incompatible-element rich, sliceous aqueous fluids a variety of uncommon mineral types are found in the skarn environment, such as: tourmaline, topaz, beryl, corundum, fluorite, apatite, barite, strontianite, tantalite, anglesite, and others.
		Skarns are a class of calc-silicate rocks and are intimately associated with granite intrusions, usually of sedimentary-metamorphic origin (S-type).
	www.marble.com /countertops/encyclopedia/65/skarn.html (622 words)

	Olympus Microscopy Resource Center: Polarized Light Microscopy Gallery - Tactite Skarn
		Generally considered a type of skarn, tactite is formed by contact metamorphism and metasomatism of carbonate rocks.
		Skarns can be found around the world and most developed during the Mesozoic period some 63 million to 230 million years ago.
		Zones of skarn are usually relatively irregular in shape due to the erratic characteristics of the host rocks, which vary in porosity, permeability, and lithology.
	www.olympusmicro.com /galleries/polarizedlight/pages/tactiteskarnsmall.html (218 words)

	skarn_deposits
		These skarns represent the distal expression of magmatic activity and exposed igneous rocks (in drill core) are dominantly thin dikes and sills with chilled margins and a very fine grained to aphanitic groundmass.
		Skarn minerals consist dominantly of garnet and pyroxene with lesser epidote, ilvaite, and actinolite; all are iron-rich (Purtov et al., 1989).
		Early skarn assemblages in reduced tungsten skarns are dominated by hedenbergitic pyroxene and lesser grandite garnet with associated disseminated fine-grained, molybdenum-rich scheelite (powellite).
	earthsci.org /mineral/mindep/depfile/skarn.htm (8167 words)

	Skarn Web Page
		A skarn listserver has been established to facilitate discussion among researchers.
		Email Addresses of people who have subscribed to the skarn listserver.
		Skarns in the classic Banat region of Romania
	www.science.smith.edu /departments/Geology/Skarn (220 words)

	Skarn
		Ordet skarn i modernt språkbruk kan översättas till återstod/avskräde/spillror och i bergsvetenskap som silikatmineral kring och i en malmkropp.
		Skarn- och kalkmalmerna indelas efter manganhalten i två grupper: manganfattig (under 1% Mn) som är vanligast och manganrika (1-12% Mn) som förekommer på ett fåtal fyndigheter.
		Friehauf, Kurt C., 1995, Skarn and Cu-(Au)-rich massive sulfide/specularite carbonate-replacement deposits of the Superior district, Arizona: Geological Society of Nevada Symposium on Geology and Ore Deposits of the American Cordillera ad th Abstracts, p.
	www.geonord.se /mineral/skarn.html (0 words)

	Mineralogy and Petrology - SKARN MINERALS AND CALC-SILICATES (Site not responding. Last check: )
		Mineralogy and Petrology - SKARN MINERALS AND CALC-SILICATES
		Gold-bearing vesuvianite and grossular skarn, near Benambra, northeast Victoria.
		This project aims to document assemblages of unusual minerals in skarn and calc-silicate deposits in Victoria.
	www.museum.vic.gov.au /mineralogy/skarn.html (53 words)

	UNIVERSITY OF GENEVA - DEPARTMENT OF MINERALOGY
		At the outcrop scale, the transition from skarn to volcaniclastic rocks is sharp, crosscuts bedding, and is in places marked by a 1 to 2 cm thick rim of K-feldspar (Fig C).
		The inner part of the skarn body consists of brown garnet (grt), a first rim is made of epidote and pyroxene, and a second one of K-feldspar (kfs), which forms the transition to volcaniclastic rocks.
		Petrographic evidence indicates a continuous process of skarn formation with a garnet-rich and pyroxene-poor prograde stage and gold deposition during a weak and sulfide-poor retrograde stage characterized by the precipitation of epidote, quartz, K-feldspar, calcite, chlorite ± plagioclase ± muscovite, pyrite and subordinate chalcopyrite, hematite.
	www.unige.ch /sciences/terre/mineral/publications/onlinepub/vallance_nambija_2003/vallance_nambija_2003.html (2353 words)

	Skarn
		Ordet skarn är en gammal svenskt bergmannaterm som användes även internationellt.
		Ordet skarn i modernt språkbruk kan översättas till återstod/avskräde/spillror och i bergsvetenskap som silikatmineral kring och i en malmkropp.
		Skarn- och kalkmalmerna indelas efter manganhalten i två grupper: manganfattig (under 1% Mn) som är vanligast och manganrika (1-12% Mn) som förekommer på ett fåtal fyndigheter.
	www.geonord.org /mineral/skarn.html (714 words)

	Skarn and Cu-(Au)-rich massive sulfide/specularite carbonate-replacement deposits of the Superior District, AZ -- by ...
		Skarn and Cu-(Au)-rich massive sulfide/specularite carbonate-replacement deposits of the Superior District, AZ -- by Kurt Friehauf 1995
		Friehauf, Kurt C., 1995, Skarn and Cu-(Au)-rich massive sulfide/specularite carbonate-replacement deposits of the Superior district, Arizona: Geological Society of Nevada Symposium on Geology and Ore Deposits of the American Cordillera ad th Abstracts, p.
		Amphibole-bearing skarn consists of an early, forest green, fine-grained (2-3 mm grains) variety growing on and cutting compositionally-zoned garnet grains which is in turn cut by light green coarse-grained (10-15 mm) amphibole veins.
	pangea.stanford.edu /research/ODEX/kurt-gsn.html (667 words)

	A new occurrence of mrazekite from Benambra, Victoria, Australia Mineralogical Record - Find Articles
		The origin of the skarn is uncertain, but may have resulted from the intrusion of a quartz porphyry mass to the east, possibly during the Triassic.
		The mineralized skarn exposed in the trenches is conspicuous for its bright blue and green veining.
		The body of the skarn is pale gray to pale brown and consists mainly of a dense granular aggregate of garnet (grossular-andradite) with patches of fibrous vesuvianite.
	www.findarticles.com /p/articles/mi_qa3672/is_199503/ai_n8719892 (897 words)

	UNIVERSITY OF GENEVA - DEPARTMENT OF MINERALOGY
		Skarn has developed on volcanic and volcaniclastic rocks with limestone intercalation pertaining to the Triassic Piuntza Unit.
		Skarn has developed preferentially on fine-grained volcaniclastic rocks as three main units roughly concordant with bedding (Fig.
		The thickest skarn unit (around 6 m) is located at the base of the mine lithological column and is separated from the second one (2 m thick) by 7 to 10 meters of coarse-grained volcaniclastic rocks.
	www.unige.ch /sciences/terre/mineral/publications/onlinepub/vallance_campanillas_2003/vallance_campanillas_2003.html (857 words)

	Ag/Au Ratios in Time and Space in the Bingham Mining District, Utah: Implications for Genesis and Exploration -- Marco ...
		If skarn development occurs under unusually reducing conditions then gold is deposited at ore grades, accompanied by pyrrhotite, from chloride solutions, as may have been the case in the Fortitude hedenbergite skarn at Copper Canyon.
		The absence of retrograde alteration in the Fortitude skarn suggests that this may have been the case there, as fluids were channeled into the Liberty fault system, producing gold ores associated with actinolite, chlorite, and pyrite in the Upper Fortitude and Tomboy-Minnie deposits.
		The other endmember gold deposit that occurs in or near skarn, the silica-pyrite gold ores, represents perhaps the lowest temperatures and the most acidic conditions in carbonate rocks developed in the evolutionary history of a given district, a fluid type that most commonly is though of as distal.
	pangea.stanford.edu /research/ODEX/marco-ag-au-bingham.html (2494 words)

	Accolon
		Skarn will only rarely be encountered outside of Accolon or Farmuz, as they have little interest in politics and are themselves solitary by nature.
		Those Skarn found in the cities tend to be visitors, merchants come to sell rare desert plants, or sorcerers seeking rare components from distant lands.
		This potent concoction allows Skarn shaman to leave their bodies and contact the spirits of the unseen world, resulting in prophetic visions and insight.
	www.theeurth.com /geo_accolon.html (1967 words)

	ORE CONTROLS FOR THE DEEP MLZ CU-AU SKARN DEPOSIT, ERTSBERG DISTRICT, PAPUA, INDONESIA
		The Deep MLZ Cu-Au skarn deposit is developed in an Upper Cretaceous to Lower Tertiary siliciclastic and carbonate succession adjacent to the 3-Ma Ertsberg pluton in the Central Range of New Guinea.
		The dominant prograde skarn assemblages appear to be controlled by protolith composition, notably the relative abundance of quartz, dolomite and calcite within the host Waripi Formation that determine the formation of forsterite- and diopside-bearing skarns.
		Skarn type based on position within the Waripi stratigraphy is directly associated with major ore zones.
	gsa.confex.com /gsa/2006AM/finalprogram/abstract_113700.htm (447 words)

	Intute: Science, Engineering and Technology - Search results
		The site includes a general overview of skarns, their historical usage, definitions of skarns, Mineralogy of skarns, skarn evolution in time and space, different types of skarn deposits, skarn zonation, skarn geochemistry, skarn petrogenesis and tectonic settings, exploration strategy's for skarn deposits and an extensive references section.
		This website is entirely dedicated to skarns and covers their petrogenesis, geochemistry, mineralogy, and economic occurrences such as exploration strategies.
		Skarns are found adjacent to plutons, along faults and major shear zones, in shallow geothermal systems, on the bottom of the seafloor, and at lower crustal depths in deeply buried metamorphic terrains.
	www.intute.ac.uk /sciences/cgi-bin/search.pl?term1=skarn&limit=0 (198 words)

	Morrrison and Treacy: The Mount Garnet Zinc Skarn Deposit
		Skarn veins and replacement zones, ranging up to several tens of centimetres thick, are common for several metres beyond the skarn horizon contact.
		Hartley and Williamson (1995) suggested the skarn protolith was probably an interbedded, fossiliferous limestone and calcareous mudstone sequence, and they note the presence of relatively unaltered small patches of residual limestone and marl outcrops at the northern end of the skarn exposure.
		Skarn alteration is characterised by prograde and retrograde assemblages.
	www.aig.asn.au /aigjournal/morrrison_and_tracey.htm (2390 words)

	Alpha Gold Corporation
		The Lustdust claims are underlain by weakly metamorphosed limestones, siltstones and mafic tuffs of the Carboniferous to Jurassic Cache Creek Group that have been folded and intruded by Eocene aged Glover Stock in related dykes and sills.
		As a result of the work additional mineralization was discovered at the south end of the Canyon Creek Skarn and the GD Zone (area 06-02) was discovered by trenching and confirmed in one diamond drill hole.
		A program of underground drilling on the Canyon Creek Skarn Zone is required to provide the data necessary for an "indicated mineral resource" estimate and a preliminary feasibility study.
	www.alphagold.bc.ca /b1.htm (670 words)

	Nelson Gold Skarn
		The skarn horizons, in limestone, are up to 6 metres thick in a sequence that strikes northeast and dips 30 to 60 degrees southeast.
		The skarn appears to be best developed near the marble-felsic tuff, chert contact, ranging up to 6 metres in thickness.
		A 1 metre section of skarn down the east wall of the 100 level ran 11.18 grams per tonne gold and 0.27 per cent copper.
	www.richriver.bc.ca /id80.htm (1611 words)

	MySpace.com - Skarn - DK - Psychedelic / Garage / Ska - www.myspace.com/skarnband
		MySpace.com - Skarn - DK - Psychedelic / Garage / Ska - www.myspace.com/skarnband
		SKARN WAS FORMED in the summer of 2004 when they all met at a music school and joined forces.
		Hør Entakt, Hannibal Hildorf, Michael Belli, Skarn, FightNight Crew, The imaginary orchestra of mr.
	www.myspace.com /skarnband (1061 words)

	Skarn Web Page
		Photo by Larry Meinert of a sample rescued from fl market oblivion by the executive intervention of Scott Parks and Bob Byrd.
		Au, Cu, Fe, Mo, Sn, W, and Zn-Pb skarn deposits
		Skarns in the classic Banat region of Romania
	www.wsu.edu:8000 /~meinert/skarnHP.html (229 words)

	www.mineweb.net \| co_releases Sinchao Metals Corp. expands high grade zinc discovery on the Sinchao property, Peru (Site not responding. Last check: )
		The samples were collected along a northwest-southeast trending skarn zone over a strike length of approximately 1,500 metres, which remains open in both directions.
		The Skarn Zone was developed by the intrusion of Tertiary aged San Miguel Diorite into Cretaceous aged limestone.
		The Skarn Zone is one of four distinct mineralized systems recognized on the Sinchao Property.
	www.mineweb.net /co_releases/578070.htm (439 words)

	globeandmail.com : globeinvestor.com : ECU Silver Mining Inc.: Press Release
		Also, several skarn units were cut with a 2.43 meters section grading 2.49 g/t Au and 17 g/t Ag being the most significant assay data received thus far, for skarn hosted mineralization in that hole.
		Several skarn units were cut, the most important being a 68.6 meters intercept with zinc mineralization containing gold and silver as disseminations or in veins and veinlets.
		Further assays are pending from both of these holes as all skarn units are being assayed as well as mineralized intrusive and mineralized recrystallized limestones.
	www.globeinvestor.com /servlet/WireFeedRedirect?cf=GlobeInvestor/config&vg=BigAdVariableGenerator&date=20060403&archive=ccnm&slug=0403176n (1425 words)

	Alpha Gold Corporation
		The Canyon Creek Skarn continues to produce consistently good results as we expand the mineralization to the south and down-dip.
		The 2006 drill program on the Canyon Creek Skarn Zone was designed to refine the geological resource of the zone by testing the down-dip continuity of the mineralization as well as the southern limit which, as was mentioned above, remains open without a defined outer limit as yet.
		The drilling was part of a large exploration program that included 6,300 metres of diamond drilling, 3,000 metres of reverse circulation drilling and 250 metres of excavator trenching.
	www.alphagold.bc.ca /2006-07.htm (481 words)

	AMC - Mineralogical Association of Canada (Site not responding. Last check: )
		In the case of some skarn types that have been relatively uneconomic in present times, such as tin and tungsten skarns, there may not have been an abundance of detailed studies of individual deposits during the last twenty years.
		The experimental work includes discussions of phase and aqueous equilibria for determination of physiochemical variables of skarn formation, ionic exchange vectors for studying the composition of calc-silicate assemblages, hydrodynamics of fluid-rock interaction, and stable isotope systematics in skarn environments.
		The inclusion of a broad initial chapter, incorporating both geological characteristics of skarn systems and thermodynamic aspects of ore formation into a single review-type summary, would have been good for those readers not intimately familiar with skarn systems.
	www.mineralogicalassociation.ca /sc26_review.htm (404 words)

	PRESS RELEASE ECU Silver Mining, Inc.: Press Release (Site not responding. Last check: )
		This section averaged 1.68 g/t Au and 6.2 g/t Ag despite the fact that an 11.6 meters section was given a grade value of nil since assays on that part are still pending.
		Secondly, Hole TA 17.5-05A confirmed the continuity of the green skarn also found in hole TA 17.5-04 in which 91.7 meters grading 1.11 g/t Au, 8.56 g/t Ag and 0.76% Zn were cut (see Stockwatch press release dated April 3rd, 2006), by entering the same skarn unit 200 meters below.
		To date, 60 meters have already been encountered but only assays for the initial 50.1 meters are available and those yielded an average of 0.32 g/t Au, 4.2 g/t Ag and 0.55% Zn which compares favorably to the 0.19% Zn for the similar section in hole TA 17.5-04.
	www.marketwire.com /mw/release_html_b1?release_id=126298 (1172 words)

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