 | | 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...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...in the lithium replacement body in the Walden pegmatite appears to be: first, caesium beryl, either morganite |  | | 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) | | PARAGENESIS OF THE TOPAZ-BEARING PORTION OF THE BROWN DERBY NO. 1 PEGMATITE, GUNNISON COUNTY, COLORADO State P....Li-rich, topaz-bearing portion of the Brown Derby No. 1 pegmatite, Gunnison County, Colorado, has been...relationships in the light of the recent model for pegmatite genesisby Jahns and Burnham (1969). The coarse-grained...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 |  | | 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...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...closed-system environment. INrnotucrtoN The Brown Derby group of pegmatites,Iong known as one of the |  | | 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 (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 |  | | 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 (article/letter/editorial) | | was done by the senior author in New Mexico and Colorado at various times during the summers of 1948, 1949...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...contact zone." Specimensof rose mica-bearing pegmatite from Bolton show the following megascopiczonal...fine-grained white feldspar-quartz rock with minor specks of schorl. The gray quartz rods tend to be normal |  | | 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) | | 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...al., 1956).The geologyof the dikes and of the district has been thoroughly investigated (Hanley et al...the minerals identified with certaintv from the Brown Derbv group is given in Table 1. Stibiotantalite |  | Collins, Donley S., Cobban, Robert R., Foord, Eugene E., Murphy, Jack A. (1989) Bibliography for update and revision of U.S.G.S. Bulletin 1114, Minerals of Colorado -- a 100 year record, by Edwin B. Eckel, Part A - Paper copy --Bibliography data file disks. Open-File Report Vol. 1989 (89-206) US Geological Survey doi:10.3133/ofr89206a | Report (issue) | | Survey Denver, Colorado Department of Geology, Denver Museum of Natural History Denver, Colorado NOTE FOR...revision of U.S.G.S. Bulletin 1114, Minerals of Colorado A 100 year record, by Edwin B. Eckel By Donley...Prepared in cooperation with Friends of Mineralogy - Colorado Chaptar, and the Denver Museum of Natural History...references dealing with the mineralogy of the state of Colorado. It is part of a more than 10 year effort to update...and revise U.S.G.S. Bulletin 1114, Minerals of Colorado: A 100 year record, by Edwin B. Eckel (1961). |  | | 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) | | 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) | | 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) | | 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...tubes, and other electronic equipment. The Walden pegmatite appears to be located along the contact of the |  | | Journal (issue) | | Julius Weber Mamaroneck, New York COLORADO ISSUE #2 Articles Colorado locality index.............................. 323 by B. L. Muntyan What’s new in Colorado minerals? ...................................... Famous mineral localities: the Home Sweet Home mine ..................................................339 by M. I. Jacobson The San Juan Mountains of Colorado ..................................349 by J. A...AMAZONITE with smoky quartz, 10 cm tall, from the Yucca Hill claim, Park County, Colorado. Richard A. Kosnar |  | | 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) | | 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 |  | | Book (edition) | | COLO RAD O GEM T RAILS t.lilky quartz crystals, Ow-ay. Katherine H . Jensen. AND MINERAL GUID E RICHARD...MILEAGE L OGS. REVISED EDITION Revised Edition, COLORADO GEM TRAILS AND MINERAL GUIDE HICllAHD :--1. PEARL...an extensive ¥em and mineral collecting tour 01 Colorado, revealing the interesting places where Nature...Swallow, Publisher) 2679 South York Street Denver, Colorado 80210 - , =· - ·, BOOKS BY RICHARD M. PEARL...PEARL Exploring Rocks, Minerals, Fossils in Colorado America's Mountain: Pikes Peak and the Pikes Peak |  | | Book (edition) | | — _ ; COLORADO GEM TRAILS AND MINERAL GUIDE ! ■ : ' BOOKS BY RICHARD M. PEARL Colorado Gem Trails...Trails and Mineral Guide Colorado Rocks, Minerals, Fossils America’s Mountain: Pikes Peak and the Pikes...Nature As Sculptor: A Geologic Interpretation of Colorado Scenery Guide to Geologic Literature Popular Gemology...Gemology Mineral Collectors Handbook Colorado Gem Trails The Art of Gem Cutting (With Dr. H. C. Dake)...Dake) * RICHARD M. PEARL ★ COLORADO GEM TRAILS AND MINERAL GUIDE ★ SKETCH MAPS BY MIGNON WARDELL PEARL |  | | Journal (issue) | | 199~ Weird The Mineral and Wonderful from Quartz Alberta's Collector's Newsletter in Septarian...(though a little skeptical) to learn of a nearby quartz collecting locality. It is a three-hour drive northeast...locomotive cxursions. My first collecting specialty was quartz, for which I've retained a soft spot, and I was...produced a wide variety of interesting and unusual quartz crystals. These are found in abundant ironstone...nodules that weather out of Fig. 1 Partial, hollow quartz crystal 11/4 inches (3 cm) across, with multiple |  | | 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) | | 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...(PJM), 975 (TCM) Box 25046, Federal Center Denver, Colorado 80225-0046 A ccording to Cross and Hillebrand...discovery of Colorado topaz was made about 1880 by a Mr. Thiebald,* "a prospector of Colorado Springs."...longest dimension, associated with feldspar, smoky quartz, and zircon. The large fragment was said to be |  | | 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 (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