 | | Journal (article/letter/editorial) | | JULY_AUGUST, 1967 MICAS OF THE BROWN DERBY PEGMATITES, GUNNISON COUNTY, COLORADO1 and,Mineralogy,The E...Michigan. Ansrnecr The Brown Derby No. 1 pegmatite, of Gunnison County, Colorado, contains a highly diversified...muscovite, sericite, and five major varieties of lepidolite. Each of the micas was formed in a unit of characteristic...elements with respect to their positions in the pegmatite and probably with respect to relative time of...replacement layers formed by reactions between zonal pegmatite rock and deuteric, residual pegmatitic fluids |  | | Journal (article/letter/editorial) | | THE PARAGENESIS OF THE WALDEN PEGMATITE, PORTLAND, CONNECTICUT (PART III) (Continued from last issue)...by Julius Weber, Mamaroneck, N. Y. Quartz in soda-lithium pegmatite is generally much less abundant than...than the cleavelandite and lepidolite save in the cores themselves which at times may be largely or entirely...core margin zones or in the core itself, euhedral quartz crystals are likely to be deposited along with...very late formed euhedral crystals of albite, lepidolite, colored tourmaline, beryl, apatite, topaz, fluorite |  | | Journal (article/letter/editorial) | | TOPAZ-BEARING PORTION OF THE BROWN DERBY NO. 1 PEGMATITE, GUNNISON COUNTY, COLORADO State P. E. RosuNBn;.G...topaz-bearing portion of the Brown Derby No. 1 pegmatite, Gunnison County, Colorado, has been reconstructed...relationships in the light of the recent model for pegmatite genesisby Jahns and Burnham (1969). The coarse-grained...gravitational settling of topaa in the melt. Lepidolite and cleavelandite crystallized later from the...form multiple quarta pods. INrnorucrrox The Brown Derby pegmatitesare a group of three main dike-like |  | | Journal (article/letter/editorial) | | PEGMATITE MINERALS OF THE UNITED STATES DAVID M. SEAMAN American Museum of Natural History, New York...found in all types of pegmatite from the common granite type to the lithium pegmatite. Many localities have...near Bedford and Overlook, New York; near Golden, Colorado and elsewhere. A fine crystal measuring 4x4x10...tourmaline crystal was noted in the Luella mine near Avon, Latah county, Idaho, which measured 3x3x8 feet. Other...Dakota. A black crystal from Micaville, Randolph county, Alabama, was 10 inches in diameter and from 3 |  | | Journal (issue) | | CHAPTER REPRESENTATIVES (ALSO BOARD MEMBERS) COLORADO CHAPTER: Bob Hembree; rhembree@comcast.net MIDWEST...Finger) and LKA Emeralds, Hiddenite, Alexander County, NC Go On Public Exhibit in New York City. Emeralds................................... 2 Independence Mine, .................................................................................. 2 Himalaya pegmatite,.................................................................................. 2 Unnamed pegmatite occurrence, Volcan Mountains ................ |  | | Journal (article/letter/editorial) | | 1960 STIBIOTANTALITE FROM THE BROWN DERBY No. I PEGMATITE,COLORADO* E. Wu. HotNntcu, Departmenl of...M'ich'igan. The Brown Derby group of pegmatitesand especiallythe Brown Derby No. 1 pegmatite on the east...east side of Quartz Creek Valley in Gunnison County, Colorado, "are famous for the exceptionaldevelopment...they contain, ever sincethe discovery in them of lepidolite (Eckel, 1933).Minerals from this dike and its...al., 1956).The geologyof the dikes and of the district has been thoroughly investigated (Hanley et al |  | | Journal (article/letter/editorial) | | Vol. 20 SOCIETY OF' AMERICA MAY, 1935 No.5 COLORADO PEGMATITES KBNNBTU K. Lauons, Unioersity of Kansas...in every county 'of Colorado along the Front Range of the Rocky Mountains from Larimer County on the Wyoming...Wyoming line to Custer County in the south-centralpart of the state, and in scatteredpre-Cambrianareas...schists and granites of Larimer County are cut by numerous pegmatite dikesl which have been exploited...exhibiting an ore mineral phaseoccur in Boulder County.3JeffersonCounty contains both tourmaline and muscovite |  | | Journal (article/letter/editorial) | | is the youngest mica to form, even following lepidolite. Indices of refraction are lower than those of...was done by the senior author in New Mexico and Colorado at various times during the summers of 1948, 1949...to the possibility that this rose mica was not lepidolite was given by Dana (1850), who states (p. 361)...154), "There is an abundanceof coarsegranite pegmatite bouldersin the immediate neighborhood of the quarry...unusually large scale . . . is due to the action of pegmatite intrusions upon the materials of the gneisslimestone |  | | Journal (article/letter/editorial) | | in quartz. A Lithium-Bearing Pegmatite in the Clear Creek District, CLEAR CREEK COUNTY, COLORADO In...Recently a lithiumbearing pegmatite has been rediscovered in the Clear Creek district on the east flank of...of Mt. Evans. This pegmatite, the Bald Mountain tourmaline prospect, contains specimens of dark green and...and blue tourmaline in quartz, as well as fine-grained lepidolite. History Boos (1954) first noted the...of the pegmatite occur at the road cut. Mineral enthusiasts should be aware that the pegmatite is located |  | | Journal (article/letter/editorial) | | FEBRUARY, 1965 THE CHIEF LITHIUM PEGMATITE, DEVILS HOLE, FREMONT COUNTY, COLORADO1 E. Wu. HnrNnrcu eNo...north of the well-known Devils Hote (lingneim) pegmatite (Hanley et aI.,1950).The depositlies approximatelr...approximatelr.-five miies north of the post officeof Texas creek, which is on the south side of the Antelope Gulch...) . and chemicals corporation in canon city, colorado. However, Iithium minerals were rumored to have...found in this area as early as 1956. The Chief pegmatite was exploredfor lithium and berl,llium in the |  | | Journal (article/letter/editorial) | | PROPERTIES OF TOURMALINE WITH ITS POSITION IN THE PEGMATITE* M. H. Staetz, K. J. MunarA, ANDJewarr- J. Grass...bizonal, Iepidolite-bearing Brown Derby pegmatites no. 2 and no. 3 of Gunnison County, Colo., show a consistent...wittr position in the pegmatite. Starting with the outer wall of the pegmatite and going inward toward...Be, and Li in tourmaline increases toward the pegmatite core. Fe, Mg, Ti, Na, Co, Ni, Cr, and V decrease...to the crystals of the outermost part of the pegmatite. The main variation in tourmaline composition |  | | Journal (issue) | | GoodspringsMining District,ClarkCounty,Nevada JackKepper P.O. Box314 Cave Creek, Arizona 85327 E-mail:...netcom.com The Milford Mine is located in the Goodsprings (Yellow Pine) Mining District, about 30 miles south...south of Las Vegas, in Clark County, Nevada. Production in the district ( 1856 to 1962) was dominated...zones of oxidation. The detailed mineralogy of the district has been published in the U.S. Geological Survey...reported the presence of wulfenite in 13 mines in the district. The better material comes from the Mobile, Shenandoah |  | | Report (issue) | | white to pale reddish pink; pale yellowish brown to dark brown. Streak: White. Luster: Dull, earthy in aggregates...370(1) Z=4 X-ray Powder Pattern: San Diego mine, California, USA. 3.038 (100), 4.835 (90), 2.964 (90), 3...35 8.50 Total 97.9 96.62 (1) San Diego mine, California, USA; by electron microprobe, total Fe as FeO;...Ca1.11 (Ta1.44 Nb0.51 )Σ=1.95 O6 . (2) Wampewo pegmatite, Uganda; by electron microprobe, total Fe as FeO;...albite, quartz (San Diego Co., California, USA); microlite, wodginite, zircon, lepidolite, quartz (Wampewo |  | | Journal (article/letter/editorial) | | QUANTITATIVE ANALYSIS OF LITHIUM-BEARING MORA COUNTY, NEW MEXTCO PEGMATITE, Rrcn.qno H. J,luNs, California Institute...:"*Nrs: ili:;{ih,,.",."u Description of the Pidlite pegmatite. General features Structure. Zones.. Composite...Mineralogy. Quantitative analysis of the Pidlite pegmatite General methods. Modal analyses Chemical composition...Pidlite dike, one of several lithium-bearing pegmatite bodies in the Precambrian terrane of the Sangre...Mora County, New Mexico. Its major part, which is well exposed in surface and underground mine workings |  | | Journal (article/letter/editorial) | | PEGMATITE MINERALS OF THE UNITED STATES Downloaded by [University of Calgary] at 23:09 04 August 2017...the Dake mine, Mitchell County, North Carolina; with tysonite in Cheyenne Canyon near Colorado Springs...Springs, Colorado; and with rutile in Alexander County, North Carolina. MONAZITE, is essentially a phosphate...Park no. 2 mine near Penland and in crystals to one and one half inches in size at the Dake mine in Mitchell...Mitchell County. It occurs also in crystals at the Ray mine near Burnsville and the Ramsey mine near Toledo |  | | Journal (article/letter/editorial) | | THE WALDEN GEM MINE By DAVID M. SEAMAN American Museum of Natural History, New York, N. Y. The Walden...Walden Gem Mine is located on the Walden farm just off of Cotton Hill road about five miles northeast of...the hill and on top of the hill you will find the mine (quarry). Please close all gates after you. This...species of minerals only present in this type of pegmatite. The quarry was opened up early in 1962 by two...caesium beryl and also along with rubidium in some lepidolite from which ROCKS AND MINERALS they are recovered |  | | Journal (article/letter/editorial) | | History, Smithsonian Institution, Washington, D. C., USA With 4 Figures Received October 19, 1993; accepted...mineral assemblages which host lithium-rich micas. Lepidolite and lithian muscovite occur in high-pressure...phosphorus-enriched amblygonite and fluorine-rich lepidolite subtypes of orogenic affiliated complex type...determined by X-ray fluorescence for lepidolite of various pegmatite subtypes, morphology ("book", "scaly"..."scaly", "fine-grained"), position within the pegmatite (primary zones, replacement units, pockets), mineral |  | | 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...stibnites from a new Nevada locality, the Murray Mine, not the old Manhattan, but he had only three specimens |  | | Journal (article/letter/editorial) | | 3749/canmin.1600010 A TECTONIC EVALUATION OF PEGMATITE PARENT GRANITES SARAH L. HANSON Adrian College...Department, 110 S. Madison St., Adrian, Michigan 49221, USA ABSTRACT Pegmatites containing rare elements can...suggested by the acronyms. The relationship between pegmatite family and granite tectonic type were re-examined...published granite compositions as a proxy for initial pegmatite composition, with special regard to the orogenic...diagrams for these granites suggest that LCT granite-pegmatite systems originate in orogenic and perhaps less |  | | Journal (article/letter/editorial) | | mineralsmay be recoveredas by-products of feldsparor mica mining. Madagascaris the only country that has produc...URANIUM minerals are common minor constituentsof pegmatite deposits, in the United Statesand other parts...mineralsthat were producedas byproducts during mining for mica and feldspar. The studyof uraniummineralsin...Keystone,S. Dak., and the Hyatt Beryl pegmatite,Larimer County, Colo.; and to JamesJ. Page,who furnishedmostof...closeassociation with potashfeldspar,plagioclase, and quartz. Many of the more commonprimary uraniummineralsbelongto |  | | Journal (article/letter/editorial) | | shallow-intrusive textures are composed almost entirely of quartz and of topaz (Johannson, 1932); ii) late-stage...rhyolites ro and granites, and greisen-, pegmatite-, quartz-type veins; and iii) cavities formed by the...Phenocrysts of topaz, K-feldspar and mica in a quartz-feldspar-topaz groundmass, within ongonite from...2014); (C) Topaz at the Honeycomb Hills rhyolite, USA, as a primary phenocryst phase including biotite...biotite (Congdon and Nash, 1991); (D) Phenocrysts of quartz, alkali feldspar, and topaz in the rhyolite dikes |  | | Journal (article/letter/editorial) | | Park, Maryland. Hafi, John C., Colorado School of Mines, Golden, Colorado. Heyl, George R., U. S. Geological...articles on quartz oscillatorplates. These valuable and timely contributions on the geology of quartz crystal...inspection, grading, cutting and testing of thin quartz wafers, were made possible largely through the...mineralogy Mineralography Memorials Miscellaneous Quartz osciliator-plates (Symposium) Total entries Illustrations...geological studies in both field and Iaboratory. Mining geologists have made valuable paragenetic studies |  | | Journal (article/letter/editorial) | | Radioactive columbite is related to a particular pegmatite district, its paragenetic position, and the presence...of the properties and textures of the opaque pegmatite minerals in polished section. Species studied...the discovery, at the Mica Lode pegmatite in Fremont County, Colorado (Heinrich, 1948), of a relatively...spessaritite) rock that replaces footwall parts of quartz-microcline cores. G (Mica Lode) 5.58, 5.66, and...plates ol columbite occur with beryl in wall zone pegmatite. G 6.26. Radio- 1365 RA DIOACTI VE COLUM B |  | | Report (volume) | | Minerals of Colorado: A 100- Year Record By EDWIN B. ECKEL GEOLOGICAL SURVEY BULLETIN 1 1 14 A...knowledge____________________________________ Future of Colorado mineralogy______________________________________...mineral localities and metallic mineral deposits of Colorado ________________________________ In pocket III...mineral localities and metallic mineral deposits of Colorado, has not been included in this reprint. Many of...especially Fischer and others, 1946). MINERALS OF COLORADO: A 100-YEAR RECORD By EDWIN B. EcKEL ABSTRACT |  | | Journal (article/letter/editorial) | | February 2015 MINERALS FROM THE HYATT MINE, TALCVILLE, ST. LAWRENCE COUNTY, NEW YORK. S. C. Chamberlain, Department...Zinc Corporation of America operates the new Hyatt mine on an orebody just south of the Oswegatchie River...Talcville in the Town of Edwards, St. Lawrence County, New York. The orebody consists of massive iron-rich...of sepiolite in the form of mountain leather, the mine has not, until recently, produced anything of particular...particular interest to collectors. In early 1994, mining operations encountered cavities lined with crystallized |
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Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA