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Topic: Alunite

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	Alunite -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-08)
		Distinct (A crystalline element used as a component in various electronic devices) crystals of alunite are rarely found in cavities in the massive material.
		Alunite crystallizes in the (additional info and facts about hexagonal) hexagonal system with crystals forming (additional info and facts about trigonal) trigonal pyramids that resemble rhombohedra with interfacial angles of 90 50', so that they resemble cubes in appearance.
		Alunite also is found near volcanic (additional info and facts about fumarole) fumaroles.
	www.absoluteastronomy.com /encyclopedia/a/al/alunite.htm (384 words)

	ALUNITE - LoveToKnow Article on ALUNITE (Site not responding. Last check: 2007-10-08)
		Alunite occurs as seams in trachytic and allied volcanic rocks, having been formed by the action of sulphureous vapours on these rocks.
		The white, finely granular masses somewhat resemble limestone in appearance, and the more compact kinds from Hungary are so hard and tough that they are used for millstones.
		Distinct crystals of alunite are rarely met with in cavities in the massive material; these are rhombohedra with interfacial angles of 90 50', so that they resemble cubes in appearance.
	www.1911encyclopedia.org /A/AL/ALUNITE.htm (2195 words)

	Bulahdelah (Alum) Mountain, Great Lakes, New South Wales, Australia
		Alunite was mined from 1878 to 1927, then again from 1934 to 1950, output about 72,165 tons.
		The natural phenomenon that is the Alum Mountain is the only known alunite deposit of potassium bearing minerals in N. The mountain is a mass of altered rock, possibly Trachytic or Rayolitic with associated sediments, some 900 feet high and 3 miles long.
		VALUE OF Since 1890, the quantity of alunite recovered and treated from the Bullahdelah Mountain exceeded 60,489 ton, the value of which was £190,103.
	www.geocities.com /mlclmcrrll/page10.html (788 words)

	Potrerillos Stable Isotope Sample Descriptions
		Alunite presumed to be supergene replacement of hydrothermal illite based on texture and inconsistent presence of alunite in white spots.
		This fault forms the lower limit of oxidation, and is marked by abundant sooty chalcocite, covellite, and native sulfur coating fracture surfaces.
		Coarse-grained alunite replacing plagioclase phenocrysts in porphyry, accompanied by pyrophyllite, zunyite, woodhouseite, pyrite, rutile, and granular quartz.
	pangea.stanford.edu /research/ODEX/tim/appendd.htm (664 words)

	PIMA Applications
		Sulfates, such as alunites and jarosites, are very common in oxidized hydrothermal environments and have very distinctive spectra.
		Alunites with a doublet towards 1.5µm contain higher sodium and therefore tend towards natroalunite, while the potassium bearing species have a doublet closer to 1.48µm.
		Empirical observations (by Spectral International and numerous explorationists) indicate that magmatic alunites usually tend to be of the potassic variety, while the sodic-bearing phases may result from ground water weathering and/or a mixing of meteoric and magmatic waters.
	www.pimausa.com /alt_syst.html (2002 words)

	Alunite
		Alunite and kelp as potash fertilizers (United States.
		Alunite in granite porphyry near Patagonia, Arizona (Contributions to economic geology)
		Acid sulfation of alunite (Report of investigations / United States Department of the Interior, Bureau of Mines)
	www.veryhappening.com /things/alunite (158 words)

	ALUNITE (Potassium Aluminum Sulfate Hydroxide)
		Alunite is also known as alumstone and is a source of the chemical known as alum, KAl(SO Some alunite has also been used to recover potassium and aluminum.
		Alunite forms from the action of sulfuric acids upon potassium rich feldspars in a process called "alunitization".
		The symmetry of alunite is the same as the members of the Tourmaline Group.
	www.galleries.com /minerals/sulfates/alunite/alunite.htm (291 words)

	v11g in fm97
		Alunite layers are locally broken, rotated, and overgrown due to deformation during alunite deposition.
		On Alunite Ridge, the alunite veins cut small pyrite- and alunite-bearing rhyolite dikes which are interpreted to be apophyses of the stock.
		The \delta³⁴S of the alunite, near zero per mil, is essentially identical to values from the base-metal mantos and wallrock pyrite which represent the bulk sulfur of the magmatic system.
	www.agu.org /cgi-bin/SFgate/SFgate?&listenv=table&multiple=1&range=1&directget=1&application=fm97&database=/data/epubs/wais/indexes/fm97/fm97&maxhits=200&="V11G" (3567 words)

	The Bullahdelah Alum Deposits, New South Wales, Australia
		The third, which has been described as the biggest deposit of alunite in the world and from which shipments have been made to England for many years, is found at Bullahdelah, New South Wales, about 60 miles north of Newcastle.
		The increase of crops resulting from the addition of raw alunite was 14%.
		Australia should be easily able to supply potash salts without delay from her deposits of the mineral alunite.
	www.geocities.com /mlclmcrrll/page13.html (330 words)

	MAPPING MIOCENE HYDROTHERMAL SYSTEMS AND ASSOCIATED MINE SITES IN THE ANTELOPE RANGE, MARYSVALE VOLCANIC FIELD, UTAH, ... (Site not responding. Last check: 2007-10-08)
		Several cells are characterized by a well-defined, horizontal zonation pattern of acid-sulfate alteration minerals that grades outwards from a core of K-rich alunite to concentric halos of alunite-kaolinite and quartz-dickite-kaolinite.
		Alunite grades upward to paleo-vadose zone mineral assemblages that include hypogene jarosite, hematite, and massive replacement, sub-sinter silica that is cut by hydrothermal breccia pipes.
		Natrojarosite, gypsum, and clay minerals are currently forming via supergene oxidation and weathering of both pyrite and alunite.
	gsa.confex.com /gsa/2002AM/finalprogram/abstract_40100.htm (453 words)

	Kaolins in North Sudan (Site not responding. Last check: 2007-10-08)
		High alunite contents of up to 70% were detected in kaolins of the border area between Sudan and Ethiopia (Fig.
		K-Ar ages of alunite (51,2 Ma) and of the overlying basalts (31,6 Ma) suggest that the main phase of basalt extrusion, which corresponds to the huge Ethiopian trap-basalts, does not correlate with alunite formation, but only the uppermost basalt layers have been dated.
		Concerning a possible use of alunite, which according to its chemical composition could be a source for potassium sulfate, sulfuric acid and alumina, elaborate techniques already exist.
	mindepos.bg.tu-berlin.de /lager/wipki/abskurz.htm (1366 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		This is a low temperature, diagentic variety of alunite.
		Comment: the alunite is probably a single phase; its lattice spacings match those of natroalunite.
		Stoffregen, R., and Alpers, C., 1992, Observations on the unit-cell dimensions, H2O contents and del D values of natural and synthetic alunite: American Mineralogist, v.77, p.
	speclab.cr.usgs.gov /spectral.lib04/DESCRIPT/alunite.gds82.html (131 words)

	Potrerillos 40Ar/39Ar Sample Descriptions and Locations
		Coarse-grained alunite replacing plagioclase phenocrysts in granodiorite porphyry, accompanied by zunyite, woodhouseite, pyrite, rutile, and granular quartz, from El Hueso Mine (Cerro Silica North).
		This fault forms the lower limit of oxidation, and is marked by abundant sooty chalcocite, covellite, and minor native sulfur coating fracture surfaces.
		Coarse-grained alunite replacing plagioclase phenocrysts in granodiorite porphyry, accompanied by pyrophyllite, zunyite, woodhouseite, pyrite, rutile, and xenomorphic quartz.
	pangea.stanford.edu /research/ODEX/tim/appenda.htm (719 words)

	[No title]
		Alunite Panel February 1942 - July 1943 7 CSIR reports January 1941 - February 1946.
		Alunite (cont'd) 1 CSIRO reports October 1951 - December 1953.
		The recovery of potassium chloride from roasted alunite.
	www.science.org.au /academy/basser/lists/ms185.txt (609 words)

	Process for the recovery of aluminum from alunite - Patent 4075068
		An improvement in the process for the recovery of aluminum from alunite in which potassium hydroxide is recovered from byproduct potassium sulfate by electrodialysis, further improvement being the use of sodium hydroxide from the bleed stream from the Bayer leach for use in the electrodialysis process for recovering potassium hydroxide from potassium sulfate.
		Processes from the production of aluminum from alunite must be as economical as possible in order to produce a commercial grade product which is competitive with the product produced from bauxite.
		Potassium hydroxide is the preferable leaching agent for leaching the calcined alunite ore of the basic process, and this leaching agent must ordinarily be purchased commercially.
	www.freepatentsonline.com /4075068.html (2685 words)

	CBN (Site not responding. Last check: 2007-10-08)
		Originally touted in October 2000 as a sensational $1 billion management contract with the little-known family firm Fondel Metal BV of The Netherlands, not much was heard from the state-run concern for the next 18 months.
		During the Soviet era, the Ganja plant manufactured 450,000 tons of alumina a year, of which 400,000 tons a year was sent to Tajikistan.
		Kavakli says that Fondel is preparing to rehabilitate the Azeri Zailik alunite field, part of Azeri Aluminum.
	www.caspianbusinessnews.com /azerbaijan_m.html (1060 words)

	Piute County: AluniteTown (Site not responding. Last check: 2007-10-08)
		Imbued with the spirit of cleanliness and improvement the good citizens of Alunite are forging ahead and the spring clean-up is now the order of the day.
		The outside of the structure is to have a new coat of paint and when school opens during the coming fall the building will be in fine shape for the reception of the faculty and pupils.
		President Chappell has ordered special furniture for the Red Cross Society of Alunite and when it arrives it will be stationed in the north room of the school building, and this room will be used until the school starts, by the newly organized Red Cross society of the mill town.
	www.rootsweb.com /~utpiute/alunitetown.html (501 words)

	Candente Resource Corp. - Projects - Peru - Mon Nov 14, 2005
		Gold grades ranging from 0.5 to 3.6 grams per tonne (gpt) occur both on surface and in trenches, pits and drill holes (reverse circulation) in vuggy silica, granular silica and quartz-alunite breccias in the Toril Zone, the northeastern portion of the property.
		Argillic (clay) alteration hosts a northeasterly striking zone of quartz -- alunite breccia measuring approximately 750 x 100 meters, and along the same strike include two areas of granular vuggy silica measuring 100 x 20 and 100 x 30 meters.
		Alteration and mineralization including alunite, opaline and vuggy silica, hematite and limonite occurs in structurally controlled zones.
	www.candente.com /s/Projects_Peru.asp?PropertyInfoID=655&View=1 (2035 words)

	Geology
		Cambrian sedimentary rocks and Cenozoic volcanic rocks were hydrothermally altered by acid-sulfate solutions at shallow depth in the Miocene, forming three mappable alteration assemblages: 1) silicified rocks containing quartz and minor alunite and kaolinite; 2) opalized rocks containing opal, alunite and kaolinite; 3) argillized rocks containing kaolinite and hematite.
		A general picture of the alteration is shown in Figure 1, combining bands 4,6 and 8 in RGB and processed to increase the color saturation.
		Red-pink areas mark mostly opalized rocks with kaolinite and/or alunite; the white area is Stonewall Playa; green areas are limestones, and blue-gray areas are unaltered volcanics.
	asterweb.jpl.nasa.gov /content/03_data/05_Application_Examples/geology (416 words)

	The Arkenstone: Fine Mineral Specimens (Site not responding. Last check: 2007-10-08)
		The old mine of Chinkuahshih is now closed, and no more worldclass samples of Alunite has been found except some big, unfortunately massive samples found in the dumps.
		However, one of them must be one of those "collector", who do not wish to do hard work, and decide to use explosive.
		Alunite mostly occurred as thick fragile crust on the matrix, and when the force of detonation apply on these important crystals...they are all gone!
	www.irocks.com /alunite.html (407 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		Alunite ALUNITE* (Piute County) was formerly a small mining community fifteen miles south of Marysvale* on the eastern slope of Deer Trail Mountain.
		The area was settled in 1914 after Tom Gillan, a local prospector, discovered the mineral alunite.
		Today the mines are a center for the production of alunite and its by-products, for which the community was originally named.
	www.uen.org /ucme/media/text/ta001062.txt (118 words)

	Abstract: Aluminium phosphates and sulphates of the alunite supergroup (=APS minerals) occur in a wide range of ...
		Abstract: Aluminium phosphates and sulphates of the alunite supergroup (=APS minerals) occur in a wide range of environments o
		In igneous rocks APS minerals may be encountered mainly in acidic through intermediate pyroclastic, volcanic and subvolcanic rocks.
		They occur in barren volcanic rocks and porphyry-type intrusions that have sparked epithermal Au-Ag-base metal deposits, Au-Sb mineralization, APS-bearing argillite and alunite deposits in their immediate surroundings.
	www.hgeodill.de /APS-Review.htm (565 words)

	Hyperspectral Signatures and Resolution
		Average kaolinite, alunite, and buddingtonite image spectra were selected from known occurrences at Cuprite.
		Figure 4: Laboratory measurements for the minerals kaolinite, alunite, and buddingtonite measured on the USGS Denver Beckman Spectrometer.
		Note that the GER63 data adequately discriminate the alunite and buddingtonite, but do not fully resolve the kaolinite "doublet" near 2.2 mm shown in the laboratory.
	cstars.ucdavis.edu /classes/mexusenvi/tut12.htm (3371 words)

	Process for recovering aluminum from alunite - Patent 4230678
		The present invention is an improvement in the basic processes for recovering aluminum from alunite ore disclosed in U.S. patent application Ser.
		The present invention is an improvement in the process disclosed in the above-referenced patent applications, this latter process including the following process steps as illustrated in the flow diagrams of the referenced patent applications.
		Obviously, the invention is not limited to the basic process as it can be used in any process in which potassium sulfate or sodium hydroxide, or both, are produced as by-products.
	www.freepatentsonline.com /4230678.html (3595 words)

	Eldorado 2001 - The New World Au & FeOx Cu-Au of South America - Preview
		The alteration is zoned with central massive to vuggy quartz, progressing outward into quartz-alunite, quartz-kaolinite (alunite) and mixed clay layers with kaolinite and pyrite.
		Residual vuggy silica containing alunite is the main host to ore. This core zone is surrounded by alunite with minor pyrophyllite and dickite, which also locally hosts ore, in turn surrounded by an outer kaolinitic to illitic clay zone.
		The massive sulphide veins are accompanied by kaolinite and lesser alunite alteration and are rich in Cu, but gold poor.
	www.portergeo.com.au /tours/eldorado2001/eldorado2001depm1a.asp (2436 words)

	alunite -- Encyclopædia Britannica
		It has been used as a source of potash (during World War I) and as a source of alumina (during World War II); in Europe it was once used extensively…
		Sulfates, which are insoluble in water and are related chemically to the saline minerals, include a barium compound called barite; celestite, an ore of strontium; and alunite, a basic aluminum and potassium sulfate.
		Gypsum, a hydrous calcium sulfate, is the source of plaster of Paris.
	www.britannica.com /eb/article?tocId=9005957 (455 words)

	MULTIPLE EPISODES OF MAGMATISM, QUARTZ-ALUNITE ALTERATION, AND ADULARIA-SERICITE PRECIOUS METAL MINERALIZATION, WESTERN ...
		Several quartz-alunite hydrothermal alteration cells near Virginia City (15.4±0.4 to 15.06±0.07 Ma, alunite; n=4), comprising cubic kilometers of rock altered by disproportionation of SO2, were contemporaneous with upper Alta-Davidson magmatism.
		Stable isotope data indicate that alunite of these cells is magmatic-hydrothermal.
		A quartz-alunite hydrothermal alteration cell north of Virginia City is 13.0±0.6 Ma (alunite).
	gsa.confex.com /gsa/2003AM/finalprogram/abstract_63942.htm (416 words)

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