 | Černý, Petr, Masau, Morgan, Goad, Bruce E., Ferreira, Karen (2005) The Greer Lake leucogranite, Manitoba, and the origin of lepidolite-subtype granitic pegmatites. Lithos, 80 (1) 305-321 doi:10.1016/j.lithos.2003.11.003 | Journal (article/letter/editorial) | | problem at some length and agreed that the albite+quartz+lepidolite+amblygonite assemblage, late as it is...(diagonal ruling) N of gneissic belt (x’s). The Annie Claim #2 and #3 pegmatites are marked 2 and 3 at...consisting of microcline-perthite, sodic plagioclase, quartz, and muscovite, with accessory almandine (Alm86-78...leucogranite consists of a coarse-grained matrix of quartz, sodic plagioclase, and muscovite, locally with...intergrown with graphic quartz (Fig. 3a). The sodic aplite typically consists of albite, quartz, muscovite, and |  | | | | Press Co., Ltd., Nassau, Bahamas Distributed in Australia and New Zealand by Oak Tree Press Co. Ltd P.O...minerals making up igneous rocks are the silicates: quartz, feldspars, micas, augite, horn¬ blende, and olivine...olivine. In sedimentary rocks, clay minerals,_ quartz, feldspars, calcite, and micas are abundant. However...fluorite; (5) apatite; (6) orthoclase; (7) quartz; (8) topaz; (9) corundum; (10) diamond. This means that...hardness of 1, while a mineral with a scratch level of quartz has a hardness of 7. This scale does not represent |  | | Book (edition) | | Press Co., Ltd., Nassau, Baham as Distributed in Australia and New Zealand by Oak Tree Press Co., Ltd., ...minerals making up igneous rocks are the silicates: quartz, feldspars, micas, augite, hornblende, and olivine...olivine. In sedimentary rocks, clay minerals. quartz, feldspars, calcite, and micas are abundant....fluorite; (5) apatite; (6) orthoclase; (7) quartz; (8) topaz; (9) corundum; (10) diamond. This means that...of 1, while a mineral with a scratch level of quartz has a hardness of 7. This scale does not represent |  | | Journal (article/letter/editorial) | | COLORADO TOPAZ Topaz, Al Si0 (F,OH) is one of Colorado's better known gem minerals. Though Col orado...orado topaz may not compare in size with that found in Brazil, gemmy crystals up to 4 inches have been found...(1882), the first record ed discovery of Colorado topaz was made about 1880 by a Mr. Thiebald,* "a prospector...longest dimension, associated with feldspar, smoky quartz, and zircon. The large fragment was said to be...the Crystal Park area. The largest fine-quality topaz specimens in Colorado occur in several separate |  | | Journal (issue) | | small black micro crystals of manganbabingtonite, quartz, calcite, datolite, and inesite (identity confirmed)...(8 cm) tall, and J5/g inches (4 cm) thick. The quartz from here can also be nice; I had one large clear...by a quantity of glistening '·Herkimer diamonds" quartz crystals, in which she specializes. Most of them...France. Also, he had small trays holding small clear quartz crystals, one tray with pale green inclusions of...have been seen to date. Associations include smoky quartz and feldspar. The locality, I believe, is a granite |  | | Journal (article/letter/editorial) | | with lesser amounts in hornblende, muscovite, quartz and accessories. However, accessory minerals --...apatite, sphene, fluorite, microlite, pyrochlore, topaz, tourmaline, bastn~/site, amblygonite, spodumene...for granitic series. The stability of Li-micas, topaz and cryolite is briefly presented. In granite melts...the onset of crystallization, and promotes quartz, topaz and feldspars above biotite in the order of...Geothermometry via the F/OH ratios of micas, apatite and topaz. (3) Economic prospecting in granitic terrains, |  | | Journal (issue) | | subscriptions |r^ , COVER: AMAZONITE with smoky quartz, 10 cm tall, from the Yucca Hill claim, Park County...Lot mine, (others) Nederland (Ferberite) James Creek Jamestown (Epidote, Garnet, Calcite, Vesuvianite... Browns Creek Area (Beryl var. Aquamarine and Goshenite, Molybdenite, Ferrimolybdite, Quartz, Fluorite...Actinolite var. Uralite after Diopside, Magnetite, Quartz var. Smoky, Sphene, Grossular, Corundum var. Sapphire...Mountain Nathrop, Browns Creek Area (Beryl var. Aquamarine, Phenakite, Quartz var. Smoky, Fluorite, Bertrandite |  | | Journal (issue) | | ClarkCounty,Nevada JackKepper P.O. Box314 Cave Creek, Arizona 85327 E-mail: kepper1@ix.netcom.com The...Arkansas for quartz, but Magnet Cove is in Hot Spring County. Your editor regrets the error. Topaz color fading-a...fading-a test Thomas Rangeffopaz Mtn. topaz is well known for its beauty, and for the fact that the...colorless in sunlight, as does much similarly colored topaz from many localities. From my collecting trips to...areas of the Thomas Range, including Maynards and Topaz Mountain, in three places. One was placed in my |  | | Report (volume) | | __ _ ______ ___ Limestone ___ ___ ___ ______ _ Quartz porphyry dikes __ ___ _ _________ Granite ____...Prospects ____ __ _____________________ Cassiterite Creek tin prospect ____________________ General geologic...__________________ Faults _______________________________ Quartz porphyry dikes ______________________ Breccia ...__ Effects of the tin-bearing solutions on the quartz porphyry dikes ______________________________ Effects...Placer tin on Cassiterite Creek_ _______________ Tin Creek tin prospect________________________ Dolcoath tin-bearing |  | | Report (Issue volume) | | + 4, Mineral Fe # — of Australia and™ Papua New Guinea ...O02unse Geology of the Mineral Deposits of Australia and Papua New Guinea The COVER PHOTOGRAPH shows...Economic Geology of Australia Guinea — 1. Metals 6.* Economic Geology of Australia Guinea — 2. Coal 7...Economic Geology of Australia Guinea — 3. Petroleum 8.* Economic Geology of Australia Guinea — 4. Industrial...New Zealand Geology of the Mineral Deposits of Australia and 1982 Eds D.A. Berkman and W. Ryall Ed. D |  | | Report (issue) | | MINERALS FOR THE COLLECTOR The Alaska Highway; Dawson Creek, British Columbia to Yukon/Alaska border Ann P...areas Cassiar Asbestos Mine Snowy Creek jade occmTence McDame Creek jade occurrence Cassiar gold occurrences...Lake jade occurrences Fiddler Yukon Mine Seagull Creek occurrence Side trip along Cano) Road to Ross River...Kluane Lake placers Kluane Lake shoreline Burwash Creek placers Wellgreen Mine Canalask Mine Canyon City...Klondike gold fields The Sixtymile Road Clinton Creek Mine Sixtymile River goldfields 101 Addresses |  | | Journal (article/letter/editorial) | | Trout Creek Pass area is north and west of the end of the range and centers around Trout Creek Passeast...north of Cotopaxi along the east side of Barnard Creek (Fie. 1). Frc. 1. Index map showing Iocation of...thick. A three-foot thickness crops out across the gentle slope of the southwest side of the gully for 200...surrounding wall zone' The core consists of pods of milky quartz,6 feet or less in length, and massesof coarsely...primary minerals of the core and the wall zone are quartz, microcline, and magnetite. The other minerals |  | | Journal (article/letter/editorial) | | Vol. 57, pp. 57r-583 (1972) PARAGENESIS OF THE TOPAZ-BEARING PORTION OF THE BROWN DERBY NO. 1 PEGMATITE...paragenesis of the asymmetrically zoned, Li-rich, topaz-bearing portion of the Brown Derby No. 1 pegmatite...phase during the crystallization of the wall zones; topaz was originally abundpnt in the hood assemblage.The...crystallization directly from the silicate melt. Large topaz crystals concentrated at the base of the core unit...assemblagesand forming the observed core unit. Topaz was armored and preserved by the tesidual melt trapped |  | | Journal (article/letter/editorial) | | crystal in quartz. A Lithium-Bearing Pegmatite in the Clear Creek District, CLEAR CREEK COUNTY, COLORADO...lithiumbearing pegmatite has been rediscovered in the Clear Creek district on the east flank of Mt. Evans. This pegmatite...specimens of dark green and blue tourmaline in quartz, as well as fine-grained lepidolite. History Boos...(Vi to I-inch grain size) unit of plagioclase, quartz, and biotite. The wall zone is a medium-grained...grain size) pegmatite composed of plagioclase, quartz, microcline (perthite), and muscovite. Two subvarieties |  | | Journal (article/letter/editorial) | | Pre-proof Origin and physical-chemical control of topaz crystallization in felsic igneous rocks: Contrasted...Soufi, Origin and physical-chemical control of topaz crystallization in felsic igneous rocks: Contrasted...Pre-proof Origin and physical-chemical control of topaz crystallization in felsic igneous rocks: contrasted...In highly evolved F-rich felsic igneous rocks, topaz Al2SiO4(F,OH)2 forms in different genetic re stages:...deciphering the origin of OH–F variations in topaz. We conclude that topaz compositions in magmatic and post-magmatic |  | | Report (issue) | | MINERALS FOR THE COLLECTOR THE ALASKA HIGHWAY; DAWSON CREEK, BRITISH COLUMBIA TO YUKON/ALASKA BORDER Ann P... . . . . . . . . . . . . . . . . . . . . Snowy Creek jade occurrence . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . . . McDame Creek jade occurrence . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . . . . Seagull Creek occurrence........................................ . . . . . . . . . . . . . . . . . . . Burwash Creek placers..... . . . . . . . . . . . . . . . .... |  | | Book | | Natural, Cultured and Imitation Alexander E. Fam Quartz Michael O'Donoghue Also availablefrom Butterworth-Heinemann... A. Jobbins Butterworth-Heinemann Gem Books Topaz m(JTTERWORTH EINEMANN Butterworth-Heinemann Ltd...Library Cataloguing in Publication Data Hoover, D. B. Topaz. - (Butterworth-Heinemann Gem Books Series) I. Title...Profile xii 1 Topaz - Historical perspectives 1 Introduction 1 Etymology of topaz 1 Topaz in ancient times...times 3 Topaz in Roman times 8 The Dark Ages 12 The Middle Age~ - topaz changes colour The beginning of |  | | Journal (article/letter/editorial) | | interestingand important swarm of dikes in the Quartz Creek pegmatite district, is well exposedon the upper...upper slopesof the east side of Quartz Creek about 6 miles northeast of Parlin at the junction of Colorado... From 1948 to 1949 the geologyof the entire Quartz Creek district was studied bv Staatz and Trites (1955)...personal observations. 2. Those made up mainly ol quartz, cleavelanditic albite, several types of lepidolite...tourmalines plus accessorymicrolite, stibiotantalite, topaz, rose muscovite, fluorite and rose beryl. Although |  | | Book | | Catalog Card Number: 74-1276 The pictures of gold-in-quartz, smithsonite, stilbite, and wulfenite on the front...minerals as quartz, feldspar, mica, garnet, tourmaline, magnetite, zircon, gold, platinum, topaz, beryl,...Schists often contain feldspar, garnet, mica and quartz. With sapphires are often found associated an abundance...oxide. Chalcedony, one of the common varieties of quartz, was formed in the same way. Pegmatites and Hematites...contains as its principal com¬ ponents feldspar, quartz and mica it is known as pegmatite. Most of our |  | | Report (volume) | | and used agate, chalcedony, and other forms of quartz for weapons and tools; they used clay for pottery...for decorations, and they cherished crystals of quartz or other minerals as amulets. After the Indians...other minerals, for they surely recognized the quartz sand, brilliant garnets, and magnetic concentrates...districts that were active at the time in Clear Creek, Gilpin, and Summit Counties. The first known attempt...known only from certain districts, while many, like quartz, feldspar, and mica, occur in some form in every |  | Burt, Donald M., Sheridan, Michael F., Bikun, James V., Christiansen, Eric H. (1982) Topaz rhyolites; distribution, origin, and significance for exploration. Economic Geology, 77 (8) 1818-1836 doi:10.2113/gsecongeo.77.8.1818 | Journal (article/letter/editorial) | | ArizonaState University,Tempe,Arizona85287 Abstract Topaz rhyolitesare fluorine-richalkaline siliciclavasand...shallowintrusivesthat are characterizedby the presenceof topaz(A12SiO4F2) in gascavities,commonlyassociated with...MnFe garnet, bixbyite, pseudobrookite, specularite,quartz, and other minerals.In the western United States...(carbonaterocks) and water tableswere presumablyhigh. Most topaz rhyolite lavasare not associated wth volcanogenicmineralization...nonreactive,and water tablescould have been low. Topaz rhyolitesof both the productiveand nonproductivetype |  | | Journal (article/letter/editorial) | | south these four localitiesare Ear Mountain, Buck Creek, Cape Mountain and Lost River. Ear Mountain occupiesan...lode deposits,came from the stream tin of Buck Creek. The region has attracted considerableattention...augite of some quartz porphyry dikes, pyroxene in contact-metamorphosed limestone, smoky quartz, vesuvianite...nameappliedto the Devonianclay slatesof Cornwall), and some quartz-augiteporphyrydikes,which have beenprospectedunder...all are post-Mississippian. Togetherwith related quartz-bearing porphyrydikes,they are the most important |  | | Book | | Litchfield County, where good crystals were taken from quartz veins in a variety of metamorphic, plutonic and...Litchfield, where a mass of white quartz on a ridge had once been mined for quartz, and large ilmenite masses...ilmenite crystals to 7 .5 cm in matrix of massive quartz from these dumps-adding that, in his judgment,...major associations of Swiss hematite iron roses are quartz, ortboclase, albite, rutile, and zeolites (especially...as sharp rhombohedral crystals to 8 cm on and in quartz; the ilmenite crystals have uniform orange-yellow |  | | Journal (article/letter/editorial) | | Photographs by Julius Weber, Mamaroneck, N. Y. Quartz in soda-lithium pegmatite is generally much less...core margin zones or in the core itself, euhedral quartz crystals are likely to be deposited along with...lepidolite, colored tourmaline, beryl, apatite, topaz, fluorite, phenakite, bertrandite, etc. Paragenetic...phase of topaz mineralization; and finally the deposition of the last generation of quartz filling in...beautifully crystallized crusts and crystals on smoky quartz crystals in vugs in cleavelandite. At the Ruggles |  | | Journal (article/letter/editorial) | | Sheep Creek, approximately 0.65 miles south of the junction of Sheep Creek with Buckhorn Creek. The peg...feet, from almost creek level to the top of a rock pinnacle 200 feet above the creek. The pegmatites trend...almost vertical veins that are concordant with the quartz-mica schist foliation. The three veins from west...with the exception that along the contact with the quartz-mica schist is a 1/8-inch zone of very fine-grained...to the north of the two eastern albitelepidolite-quartz pegmatites. Field assistant, G . Hey man, is in |
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Quartz Creek, Gentle Annie, Baw Baw Shire, Victoria, Australia