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Topic: Allanite

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	Allanite - Wikipedia, the free encyclopedia
		Allanite is a sorosilicate group of minerals within the broader epidote group that contain a significant amount of rare earth elements.
		Also highly radioactive grains of allanite often have their structure disrupted or are metamict.
		Allanite is usually fl in color, but can be brown to brown-violet.
	en.wikipedia.org /wiki/Allanite-(La) (206 words)

	allanite.htm (Site not responding. Last check: 2007-10-23)
		WAUPACA COUNTY: Allanite is an accessory in the Waupaca adanellites as exposed in the granite quarry north of Waupaca in NW NW Sec.
		WOOD COUNTY: Allanite is an accessory in the granite exposed in the Haske quarry in Sec.
		- Allanite was tentaively identified as associated with thorite in granite in the County Quarry, in Cary township (NW sec.
	www.uwrf.edu /~william.s.cordua/allanite.htm (516 words)

	Earth Materials, Experimental Petrology (Site not responding. Last check: 2007-10-23)
		Allanite coexists with garnet, omphacite, phengite, quartz (ex coesite) and rutile in eclogites and with and garnet, kyanite, phengite, quartz (ex coesite) and rutile in metasediments in agreement to parageneses produced in the experiments.
		The stability of allanite to unexpectedly high temperature and high pressure has important consequences for the composition of fluids/melts generated in the presence of allanite because allanite buffers the LREE contents of these melts.
		Allanite is stable at higher temperatures than the dehydration of phengite (Figure 1) which is an important water reservoir in subducted oceanic crust.
	rses.anu.edu.au /pep/annualreports/annualreport99/project8.html (429 words)

	ALLANITE Chapter16. Sorosilicates and cyclosilicates
		Most Franklin allanite occurs as fl, euhedral, bladed crystals embedded in green to whitish-green microcline; much of this material was found on the Trotter Dump, and inferior specimens are still abundant (Figure 16-2).
		The local abundance of this material indicates that the solutions from which allanite and microcline formed were relatively rich in Ce.
		Palache (1935) mentioned the occurrence of allanite on the dumps of the local nearby iron mines; this material has not been studied by the writer.
	franklin-sterlinghill.com /dunn/ch16/allanite.stm (352 words)

	Th-Pb ion-microprobe dating of allanite (Site not responding. Last check: 2007-10-23)
		Allanite occurs in regionally metamorphosed pelites and felsic igneous rocks.
		Using an ion microprobe to determine allanite ages would have several advantages: mineral separation is not needed, dating of small grains (~15 mm) is feasible, and rock textures are preserved permitting its relationship with other minerals to be assessed.
		Because allanite can degrade to an amorphous gel due to the bombardment of a particles emitted by its radioactive constituents, the ion microprobe is also useful because it has the spatial selectivity to analyze small areas on the grains unaffected by alteration.
	fp.okstate.edu /catlos/allanite.htm (258 words)

	Allanite
		Allanite, also known as "orthite" in Europe, is one of the most common rare earth minerals, which...
		Zoned allanite is a minor mineral in highly altered blocks of garnet amphibolite that occur in a...
		Unaltered, igneous allanite from the Casto pluton is characterized by a narrow...
	www.toprocks.net /MineralList/2/Allanite.asp (505 words)

	Allanite from Franklin, NJ (Site not responding. Last check: 2007-10-23)
		Allanite occurs most commonly as brittle "crystals" which actually have very little organized crystal structure remaining.
		Allanite is an accessory mineral in many igneous rock environments.
		Allanite is an interesting mineral that occurs primarily in the pegmatite regions of the Franklin deposit.
	www.njminerals.org /allanite.html (397 words)

	Allanite
		It is that of a typical allanite, which is a hydrous silicate of aluminum and calcium with more or less iron, manganese, and a few of the rare-earth metals.
		Allanite is found at Franklin only in the pegmatite.
		In sinking the Trotter shaft on Mine Hill much pegmatite was encountered, and in places, especially where the coarse pegmatite was in contact with either limestone or zinc ore, allanite was abundant.
	franklin-sterlinghill.com /palache/allanite.stm (411 words)

	ALLANITE (Calcium Rare Earth Aluminum Iron Silicate Hydroxide)
		Allanite, also known as "orthite" in Europe, is one of the most common rare earth minerals, which is somewhat of an oxymoron.
		Embedded crystals of allanite are frequently seen with a "halo" or dark ring; evidence of the radioactive effects on nearby minerals.
		Allanite is found as an accessory mineral in several igneous rocks such as granites, syenites, diorites and their pegmatites and in a few metamorphic rocks as small embedded grains.
	mineral.galleries.com /minerals/silicate/allanite/allanite.htm (703 words)

	Allanite-(La): Allanite-(La) mineral information and data.
		Hasegawa, S. (1957): Chemical studies of allanites and their associated minerals from the pegmatites in the northern part of the Abukuma massif.
		Hugo, P.J. (1961): The allanite deposits on Vreda Gordonia district, Cape Province.
		Fleischer, M. (1985): A summary of the variations in relative abundance of the lanthomides and yttrium in allanites and epidotes.
	www.mindat.org /min-126.html (580 words)

	Mineral description : Allanite-(Ce) (Site not responding. Last check: 2007-10-23)
		Allanite as a vein in cerite from Bastnäs.
		If anyone knows if the allanite from the above localities are radioactive or not, send me an email so I could include it here.
		If you have some questions, suggestions or comments you are welcome to write me a line or two.
	www.geology.neab.net /minerals/allanitc.htm (92 words)

	Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations
		Small irregularly shaped aplitic allanite pegmatite bodies occurring near the contacts of a larger aplitic body with granodiorite are described.
		Allanite represents a considerable pant of the pegmatite, is equally distributed, and can be regarded as a major constituent.
		Similar allanite pegmatites recently discovered in the Precambrian gneisses and schists in Clark County, Nevada and San Bernardino County, California are also described.
	www.osti.gov /energycitations/product.biblio.jsp?osti_id=4833245 (233 words)

	[No title] (Site not responding. Last check: 2007-10-23)
		"Allanite is an accesory mineral in many granites, grandiorites, monzonites, and syenites, and occurs in large amounts in some limestone skarns and pegmatites.
		It is typically a very dark mineral, and this sample is no exception.
		Small amount of residual allanite; most of the sample has been damaged beyond X-ray diffraction recognition by autoradiation.
	speclab.cr.usgs.gov /spectral.lib04/DESCRIPT/allanite.HS293.3B.html (205 words)

	LASER-ABLATION U-Th-Pb IN SITU DATING OF ALLANITE AND ZIRCON: AN EXAMPLE FROM THE OCTOBER HARBOUR GRANITE, CENTRAL ...
		This is the first report of Th-Pb dating of allanite by the LAM-ICP-MS method, confirmed by zircon ages from the same section.
		Twenty-six analyses of two such crystals of allanite gave sixteen concordant points, obtained mainly from the low-Th core of a single large crystal, and a weighted mean
		Although complex Pb-loss is also recorded in portions of the allanite crystals analyzed, no evidence of inheritance was recorded.
	pubs.nrc-cnrc.gc.ca /mineral/tcm-27341-2.html (674 words)

	Orthite
		A former name for allanite, esp. when found in slender prismatic or acicular crystals.
		Alteration is closely associated with magnetite and orthite (allanite) development...
		...Allanite, also known as "orthite" in Europe, is one of the most common rare...
	www.toprocks.net /MineralList/67/Orthite.asp (323 words)

	Allanite-(Ce): Allanite-(Ce) mineral information and data.
		Thomson, T. (1810) Experiments on allanite, a new mineral from Greenland.
		Frondel, J.W. (1964), Variation in some rare earths in allanite: American Mineralogist: 49: 1159-1177.
		Dollase, W.A. (1971), Refinement of the crystal structures of epidote, allanite and hancockite: American Mineralogist: 56: 447-464.
	www.mindat.org /min-125.html (496 words)

	Ce Edge Data
		CE L3 OF #105 ALLANITE 6 6 4-24-84
		CE L3 IN #155 SYN ALLANITE 6 6 4-23-84
		CE L2,1 IN #155 SYN ALLANITE 7 8 4-23-84
	scon155.phys.msu.su /~IXS/database/data/Farrel_Lytle_data/RAW/Ce (419 words)

	Allanite (Site not responding. Last check: 2007-10-23)
		BREAKABILITY - Imperfect cleavage on {001} and poor on {100} and {110} with an uneven to conchoidal fracture.
		OCCURRENCE - Allanite is an accessory mineral in granites and granitic pegmatites and in syenites.
		It is also occasionally found in schists and gneisses and as grains in sedimentary deposits.
	www.gc.maricopa.edu /earthsci/imagearchive/allanite.htm (101 words)

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