 | | 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...euhedral crystals of albite, lepidolite, colored tourmaline, beryl, apatite, topaz, fluorite, phenakite,...in the lithium replacement body in the Walden pegmatite appears to be: first, caesium beryl, either morganite |  | | 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 (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) | | PEGMATITE MINERALS OF THE UNITED STATES DAVID M. SEAMAN American Museum of Natural History, New York...Silica and Silicates (part three) (concluded) TOURMALINE is a complex silicate of boron and aluminum with...large amounts in granite and is then called a tourmaline granite. The common, black, iron rich variety...Black tourmaline is the most common kind of tourmaline and has been found in all types of pegmatite from...from the common granite type to the lithium pegmatite. Many localities have yielded large well terminated |  | | 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) | | monazites from several well-studied pegmatites and pegmatite districts in the western states have been analysed...only of individual pegmatites but also of entire pegmatite districts. WITHIS the last fifteen years there...from t*he Shelby district. Norbh (‘arolina; two are from quartz monazite pegmatite and three from the...monazite from different pegmatites in a single district show any composiCona1 variation. 3. General compositional...for cerium. (;EOI,OGY OF THE tiPECIMENS Petaca District, New Mexico The geology and mineralogy 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...mineral phaseoccur in Boulder County.3JeffersonCounty contains both tourmaline and muscovite pegmatites.aComplex |  | | 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...form multiple quarta pods. INrnorucrrox The Brown Derby pegmatitesare a group of three main dike-like...within the Quartz Creek Pegmatite District (Staatz and Trites, 1955) about 17 miles east of Gunnison,Colorado |  | | Journal (article/letter/editorial) | | terminated green tourmaline crystal in quartz. A Lithium-Bearing Pegmatite in the Clear Creek District, CLEAR...CLEAR CREEK COUNTY, COLORADO In all of Colorado's Front Range only a few pegmatites are known to contain lithium...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 |  | | 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 |  | | Journal (article/letter/editorial) | | was done by the senior author in New Mexico and Colorado at various times during the summers of 1948, 1949...assemblageincludes albite, spodumene, blue, green, and pink tourmaline, colorlessand light yellow beryl (goshenite)...cassiterite. The rose mica is associated with the pink tourmaline. Becauseof its reported large 2E, it is possible...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) | | 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 |  | | 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;...microlite, beyerite, tourmaline, albite, quartz (San Diego Co., California, USA); microlite, wodginite |  | | 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) | | AND PHYSICAL PROPERTIES OF TOURMALINE WITH ITS POSITION IN THE PEGMATITE* M. H. Staetz, K. J. MunarA...Washington25, D. C. AesrRAcr Tourmaline crystals of the bizonal, Iepidolite-bearing Brown Derby pegmatites no. 2...2 and no. 3 of Gunnison County, Colo., show a consistent variation in color, refractive index, and composition...wittr position in the pegmatite. Starting with the outer wall of the pegmatite and going inward toward...toward the core, the colors of the tourmaline crystals are black, dark green, blue, light green, and pink |  | | 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) | | 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 |  | | 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 |  | | 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 |  | | Journal (article/letter/editorial) | | History, Smithsonian Institution, Washington, D. C., USA With 4 Figures Received October 19, 1993; accepted...X-ray fluorescence for lepidolite of various pegmatite subtypes, morphology ("book", "scaly", "fine-grained")..."fine-grained"), position within the pegmatite (primary zones, replacement units, pockets), mineral assemblages...Glimmern aus granitischen Pegmatiten Granitische Pegmatite, die dutch fortgeschrittene Anreicherung und Fraktionierung...a high-pressure, low-temperature condition of pegmatite crystallization in contrast to the low-pressure |  | | 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 (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 (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 |  | | 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 |  | Thompson, Woodrow B., Bearss, Gene T., Falster, Alexander U., Simmons, William B., Nizamoff, Jams W. (2000) The Estes Quarry, Cumberland County, Maine: A New Pegmatite Mineral Locality. Rocks & Minerals, 75 (6) 408-418 doi:10.1080/00357520009605667 | Journal (article/letter/editorial) | | 16 August 2013 Cumberland Countv. Mahe A New Pegmatite M ineral Locality T he Estes quarry in southwestern...southwestern Maine exposes a granite pegmatite hosting more than forty mineral species. This locality contains...located on Route 5 in West Baldwin, Cumberland County, Maine (fig. 1). It is on the western flank of...on a bright purple mineral in one of the large pegmatite boulders scattered around the pit. The mineral...(fig. 2). Most of the exposed ledge was granite pegmatite, so the fresh rock pile was checked for interesting |
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Brown Derby No. 1, Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA