 | | Journal (article/letter/editorial) | | PEGMATITES OF EIGHT MILE PARK, FREMONT couNTY, coLoRADO E. Wm. Heinrich, Deparlment of Mineralogy, Uniaersi...J/J 5t I 579 583 5d5 PEGMATITES OF EIGHT MILE PARK, COLORADO .).) I MINERALOGY GeNBnar, FnarunBs...FnarunBs On the basis of occurrence the pegmatite minerals may be divided into three groups: o 1. The common...present at all, are small. fn the School Section pegmatite 1- to 6-inch vugs containing minute cleavelandrte...Prcultnn Quartz Microcline Andesine Oligoclase Albite Muscovite Biotite Chlorite Lepidolite Garnet Beryl |  | | Journal (article/letter/editorial) | | BEYERITE FROM COLORADO* E. Wru. IferNnrcrr, Unioersity of Michigan, Ann Arbor, Michigan. Ansrnacr Bismutite...pegmatites in colorado and northern New Mexico. rn three pegmatites in south-central colorado (Mica Lode...school section deposits, Fremont county, and Meyers Ranch body, park county) beyerite is intergrown with...spring of 1943the writer examined pegmatite deposits in south-central colorado for the Geological Survey, united...been recorded (Heinrich, 1946). Field work on Colorado pegmatites was resumed in the summer of 1946 under |  | | Journal (article/letter/editorial) | | PEGMATITES OF EIGHT MILE PARK, FREMONT COUNTY, COLORADOXT E. Wrrr. HerNnrcu, Department of Mineralogy...The Eight Mile Park pegmatite district, three to twelve miles west of Canon City, Fremont County, Colorado...separate paper. 420 PEGMATITES OF EIGHT MILE PARK, COLORADO 42r area are flanked on the east by...Springs biotite schists by granite, aplite, and pegmatite. The pre-Cambrian structural elements trend uniformly...aplite sills in granite, (5) the attitudes of pegmatite sills in schist, and (6) the trend of the axis |  | | 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) | | variation has little effect. Three new analyses of Colorado triplites are presented; two are high in Mg. Apparently...a study of the pegmatites of Eight Mile Park, Fremont County, Colorado, the writer described several...a previously unrecorded occurrencein northern Colorado. NBw AxervsBs In Table 1 are listed the results...1. Triplite, Mica Lodge pegmatite, Eight Mile Park, Fremont County, Colorado. 1a. Molecular ratios. 16...Triplite, School Section pegmatite, Eight Mile Park, Fremont County, Colorado. 2o. Molecular ratios. 2b |  | | Journal (article/letter/editorial) | | Lithium-Bearing Pegmatite in the Clear Creek District, CLEAR CREEK COUNTY, COLORADO In all of Colorado's...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...of the pegmatite occur at the road cut. Mineral enthusiasts should be aware that the pegmatite is located...and unauthorized collecting is not allowed. The pegmatite was studied by the authors from July to September |  | | 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) | | were found in the Mica Lode pegmatite, Eight Mile Park, Fremont county, colorado. Two other new triplite...school Section pegmatite in the same district and another pegmatite in El Paso county, colorado. The triplite...in a study of the pegmatite deposits of Eight MiIe Park, Fremont County, Colorado, the junior author...GnNnner, Gror,ocv The geology of the Eight Mile Park pegmatite area has been studied by the junior author...author (Heinrich, 1947). The area is a 25-square mile plateau roughly bisected by the Royal Gorge of the |  | | Journal (issue) | | MINERALOGICAL SOCIETY BULLETIN What the Heck is Pegmatite? (The Basics) by Bob Carnein Lake George Gem &...& Mineral Club News June 2019 Now retired to Colorado, Dr. Carnein was an active member of NMS when he...the first problem when defining what a pegmatite is. Pegmatite is the name of an igneous-rock texture...rock type. On the average, mineral grains in a pegmatite are more than 1 cm (about ½ inch) across (Bates...across occur at the Devils Hole mine, in Fremont County, Colorado). More typically, they are on the order |  | | Journal (article/letter/editorial) | | PEGMATITE MINERALS OF THE UNITED STATES DAVID M. SEAMAN American Museum of Natural History, New York...to twenty or more feet in length and to six or eight feet in height and width. Black tourmaline is the...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...crystal was noted in the Luella mine near Avon, Latah county, Idaho, which measured 3x3x8 feet. Other large |  | | 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...specimenswere collectedby the writer. Eight-Mile Porh, Fremont Co., Colorad.o Ref.: Heinrich, 1958 Deposits...Columbite occurs as tabular crystals in a unit of albite-muscovite-beryl (+ triplite and spessaritite) rock |  | | Journal (article/letter/editorial) | | lacroixite, amblygonite, montebrasite, Canon City, Colorado. Sommaire Deux échantillons de “natromontebrasite”...lacroixite, amblygonite, montebrasite, Canon City, Colorado. Introduction On the basis of results of a wet-chemical...occurring in the Eight Mile Park pegmatite, near Canon City, Fremont County, Colorado. As the analyzed...association containing “fremontite” from the Eight Mile Park pegmatite. A few years after, Heinrich & Corey (1955)...for a sample of montebrasite from the Buranga pegmatite, Rwanda, with 6.7 wt.% Na2O. Considering the fluctuation |  | | Journal (article/letter/editorial) | | Two Point claim, Pikes Peak batholith, Teller County. The Collector’s Edge specimen, Jeff Scovil photo...Mail Stop 150, Box 25046 Federal Center Denver, Colorado 80225 pmodreski@usgs.gov C olorado is, of course...prohibitions on collecting or to private land or mining claims for which permission has been obtained....been written as guides to mineral collecting in Colorado. A classic, which went through three major editions...1951 version with a slightly different title), is Colorado Gem Trails and Mineral Guide, by Pearl (1951, |  | | Journal (article/letter/editorial) | | ZONING IN PEGMATITE DISTRICTS* E. Wu. HurNnrcrr, University of Michigan, Ann Arbor, Michigon ABSTRACT...ABSTRACT fn numerous pegmatite districts the size, shape, external and internal structure, texture and mineral...mineral content of an individual pegmatite can be shown to be functions of the distance of the body from...Widespread and intensive field investigations of pegmatite mineral deposits during the last 15 years have...attention has been directed toward the study of pegmatite districts or provinces and toward relating the |  | | Journal (article/letter/editorial) | | Pegmatite Minerals of the United States David M . Seaman American Museum of Natural History, N e w Y...often makes up the greater bulk of the mass of pegmatite material. Many masses are found in the cores in...from the Devil's Head area southwest of Denver, Colorado, a few years ago. A large milky quartz crystal...Connecticut, and from the Mt. Antero region of Colorado. A very large smoky quartz crystal was recovered...Custer, South Dakota; near the Royal Gorge in Colorado, and elsewhere. Small crystals of rose quartz |  | | Journal (issue) | | collection of & FOSSIL SHOW • 1305 Memorial Ave. (1 mile west of 1-91) • W". SPRINGFIELD, ~ Herb & Monika...well-known Ukrainian heliodor occurrence and its many pegmatite minerals. Like its predecessor locality issues...history, geology, mineralogy and a discussion of pegmatite origins, all with exceptional photography of many...is interesting and well diagramed. Chapter 4, Pegmatite Minerals, extends 72 pages and is further divided...Huizing, 534 I Thrasher Dr, Cincinnati OH 45247 USA Please, make checks payable to Mineralogical Almanac |  | | Journal (article/letter/editorial) | | PEGMATITE MINERALS OF THE UNITED STATES Downloaded by [University of Florida] at 10:46 04 August 2017...and Rincón, California; in the Petaca district of Rio Arriba County, New Mexico; from the Harney Peak region...of South Dakota; the Reagan mining district, Kern range, White Pine County, Nevada. SULFUR, S, occurs...decomposition of metallic sulfides. It has been found in Colorado as tiny yellow grains as a very rare mineral in...New York. GRAPHITE. C, is rather uncommon in pegmatite. In the eastern and southeastern Adirondack region |  | | Journal (issue) | | friends. W evada was experiencing a boom in gold mining and exploration was as at a high point. We agreed...love fo r the remote Nevada deserts and the old mining districts. We also served in the military during...Rediscovered: The Royal Gorge No. 1 Mine, Eight Mile Park, Fremont County, Colorado Mark Ivan Jacobson Perth Pouch...tourmaline pegmatite near Royal Gorge (Jacobson 1997), Eight Mile Park, Fremont County, Colorado. This photograph...colored tourmalines Ben Roesch 6 14 Southern Cross Colorado Springs, CO 80906 (Sterrett 1909). The purpose |  | | Journal (article/letter/editorial) | | MOUNT ROSA AREA, EL PASO AND TELLER COUNTIES, COLORADO. II. PEGMATITESI EuceNB B. Gnoss, CaliJornia Diris...Michigan. Aesrnlcr Two contrasting swarms of pegmatite dikes occur intermingled in the Pikes Peak granite...alkalic granites in the Mount Rosa area, west of Colorado Springs. One is the older calc-alkalic Pikes Peak...pegmatites of the St. Peters Dome district, Mount Rosa area,Colorado,attracted the attention of mineralogists...and agesof pegmatites occur side-by-sidein the district has led us to a clarification of the paragenesis |  | | Journal (article/letter/editorial) | | Ordinate (mineral assemblages of zonesandunits): ab: albite,am: amblygonite, ap: apatite, be: beryl, cl: cleavelandite...Z. mixed core zone--Li-mineralization+ quartz+ albite,S-ab: sugaryalbite. 1: possiblya replacementunit...morethanaccessory amounts. ,4bscissa(individual pegmatite sectionswith zones and units found within the...part), XX: Van de Made's pegmatite(western part), XXI: Kaliombo (Berger's pegmatite). GENESISAND CRYSTALLIZATION...mineralconstituents in a particularzone, such as that of albite-perthite-quartz-muscovite. The Karlsbrunnpegmatiteshows |  | | Journal (issue) | | by Vandall King. from Orchard Dome, Fort Bend County, Texas Art Smith 9118 Concho Houston, Texas 77036...77036 • In I 969 and 1970 Duval's Frasch sulfur mining operations at Orchard Dome were being geared down...1 White fluorite, 2 mm, Orchard Dome, Fort Bend County, Texas, photo by the author. ,/" 2 Minero!...Mine: the Royal Gorge No. 1 Mine, Eight Mile Park, Fremont Co., Colorado Mark Jacobson 112 N. Lemans St...tourmaline mine of the Colorado miner, C. A Beghtol. This long lost pegmatite was described by Douglas |  | | Journal (article/letter/editorial) | | 1965 MINERALOGY AND PARAGENESIS OF THE COTOPAXI, COLORADO, Ct-Zn SKARN DEPOSIT Cuenr.BsA. Sar-orrr,Departmentof...base-metal deposits crops out in south-central Colorado. At Cotopaxi mineralization is confined to a small...INrnonucrroN Nearly all metallic mineralization in Colorado is associatedwith igneous rocks and structures...but little-studied ore deposits in south-central Colorado is Precambrian in age. These deposits (Fig. 1)...Chaffee County Cleora district prospects (Fig. 1, No. 2) Sedaliamine (Fig. 1, No. 1) Turrett district (Fig |  | | Journal (issue) | | Mammoth-St. Anthony Mine (Tiger, Pinal Co., Arizona, USA). Ex coll. Rock Currier. Part of the American Mineral...the state is home to the New Mexico Institute of Mining & Technology (NMIMT), formerly the New Mexico School...admitted to NMIMT to begin studies in geology and mining engineering. I can still remember the first time...about 26 miles west of Socorro in the Magdalena District. The smithsonitc specimen was approximately 12...but virtually every student majoring in geology, mining or metallurgical engineering had paid a visit to |  | 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). |  | | Journal (article/letter/editorial) | | is from Leiper’s quarry at Springfield, Delaware County, Pennsylvania (Peters 1984). When the spessartine...commonly associated minerals are beryl, apatite, albite, muscovite, potassic feldspar, and quartz in the...spessartine masses to 2 cm across occur in blocky albite in the Keith quarry at Auburn, Maine. Analyses...to 7 cm across occur near Middletown, Middlesex County, and massive spessartine and relatively small crystals...localities in Figure 2. A classic Avondale, Delaware County, Pennsylvania, spessartine specimen with a major |
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