 | | 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...consists chiefly of muscovite schist with minor biotite schist and quartzite. This series was intruded...intrusion of Idaho Springs biotite schists by granite, aplite, and pegmatite. The pre-Cambrian structural |  | | Journal (article/letter/editorial) | | PEGMATITES OF EIGHT MILE PARK, FREMONT couNTY, coLoRADO E. Wm. Heinrich, Deparlment of Mineralogy, Uniaersi...Microcline. Graphic granite. Plagioclase. Muscovite. Biotite. : 551 .).).t 553 554 .).).) Chlorite Lepidolite...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...rock-forming minerals: qvartz, microcline, muscovite, and biotite. Other subordinate constituents are oligoclase |  | | 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) | | 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) | | 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) | | 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) | | 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) | | 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...(5),3.95 (4), 3.45 (4),1.73 (4)]. Dedls Hole, Fremont Co., Col,orod.o Ref.: Hanley et al., 1950 Thinly |  | | 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) | | FEBRUARY, 1965 THE CHIEF LITHIUM PEGMATITE, DEVILS HOLE, FREMONT COUNTY, COLORADO1 E. Wu. HnrNnrcu eNo...mately one airline mile north of the well-known Devils Hote (lingneim) pegmatite (Hanley et aI.,1950)...on the south side of the Antelope Gulch, about I mile west of the junction betweenAnterope and E a s t...) . 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 (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 (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) | | 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...amphibolite, but biotite gneiss and nodular sillimanite schist also are mineralized. Both biotite gneiss and...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) |  | | 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...characterized by quartz and amazonite crystals, zircon, biotite, siderite, and minor topaz, allanite, cassiterite...pegmatites of the St. Peters Dome district, Mount Rosa area,Colorado,attracted the attention of mineralogists |  | | Journal (article/letter/editorial) | | 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...importance,excludingthe accessories.In the Van de Made pegmatite there is a certain amount of doubt as to the true...without muscoviteor biotite. This rock-type,as developedin pegmatitesof the Karibib district, is alsocommonin...distinctbreak in the crystallization history of the pegmatite--achangefrom the crystallizationof essentially |  | | 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 |  | | Book (edition) | | 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...Atlas of Colorado American Gem Trails Nature As Sculptor: A Geologic Interpretation of Colorado . Scenery |  | | 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 |  | | Book (volume) | | ...........................................59 Colorado ...............................................................548 Table of Maps Page Alabama County Map ...................................................................................4 Alaska County and Stream Map ..................................Co. Mining Districts ............................................................22 Arizona County Map.........................23 Arizona – Cochise Co. Mining Districts .................................... |  | | Report (chapter) | | LIBRARY South Platte District, Colorado · by Wm. B. Simmons and E. Wm. Heinrich Colorado Geological Survey...Denver, Colorado I 1980 Front cover: Wide Angle photograph of the Oregon No. 2~ pegmatite, South Platte...Platte pegmatite district, Colorado. This striking example graphically illustrates the exceptionally...structural zonation of the pegmatites of this district. A fifty foot high column (40 feet across at the...the bottom of the pit. The quartz core of the pegmatite was left standing in relief as the enveloping |  | | Book (volume) | | ...........................................47 Colorado ................................................rights, so remember you were told. If in doubt, a county map will tell you who the legal owner is. Good...gemmy qualities for cutting and polishing. AUTAUGA COUNTY PRATTVILLE, N. 6 mi., and just E of the Birmingham...were well known to prehistoric Indians.) BARBOUR COUNTY BAKER HILL, SE 1 mi. : 1 in a deep ravine, as a...deep red to variegated⎯ocher. BIBB COUNTY GENERAL AREA: c county gravel pits along the Cahaba R.⎯gemmy |  | | Book (volume) | | ...........................................47 Colorado ................................................rights, so remember you were told. If in doubt, a county map will tell you who the legal owner is. Good...gemmy qualities for cutting and polishing. AUTAUGA COUNTY PRATTVILLE, N. 6 mi., and just E of the Birmingham...were well known to prehistoric Indians.) BARBOUR COUNTY BAKER HILL, SE 1 mi. : 1 in a deep ravine, as a...deep red to variegated⎯ocher. BIBB COUNTY GENERAL AREA: c county gravel pits along the Cahaba R.⎯gemmy |  | 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) | | like those of the Upper Mississippi Valley district in the United States, show distinctive mineralogic...meteorite was found in 1936, near Shallowater, Lubbock County, Texas. It is an extraordinarily coarse diogenite...discovered in pegmatite masses occurring in syenite near Tory Hill, Haliburton County, Ontario. Film...Rainier highway from the southern entrance of the Park at Ohanapecosh disclosed a transition in the metasomatism...also given. MINERATS OF EIGHT MILE PARK, COLORADO KENNETE K. LANDES Eight Mile Park is the partially wooded |
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