 | Stern, Charles R., Allaz, Julien M., Raschke, Markus B., Farmer, G. Lang, Skewes, M. Alexandra, Ross, Jeremy T. (2018) Formation by silicate–fluoride + phosphate melt immiscibility of REE-rich globular segregations within aplite dikes. Contributions to Mineralogy and Petrology, 173 (8) doi:10.1007/s00410-018-1497-7 | Journal (article/letter/editorial) | | immiscibility of REErich globular segregations within aplite dikes Charles R. Stern1 · Julien M. Allaz1,3 · Markus...Germany, part of Springer Nature 2018 Abstract Aplite dikes intruding the Proterozoic 1.42(± 3) Ga Longs...Silver Plume-type peraluminous granite near Jamestown, Colorado, contain F, P, and rare earth element (REE)-rich...features and geochemical data suggest that the aplite and REE-rich globular segregations co-existed as...segregations. These data are consistent with the aplite dikes and the REE-rich segregations they contain being |  | Allaz, Julien, Raschke, Markus B., Persson, Philip M., Stern, Charles R. (2015) Age, petrochemistry, and origin of a REE-rich mineralization in the Longs Peak-St. Vrain batholith, near Jamestown, Colorado (U.S.A.) American Mineralogist, 100 (10) 2123-2140 doi:10.2138/am-2015-5253 | Journal (article/letter/editorial) | | the Longs Peak-St. Vrain batholith, near Jamestown, Colorado (U.S.A.) Julien Allaz1,*, Markus B. Raschke2...Geological Sciences, University of Colorado Boulder, 399 UCB, Boulder, Colorado 80309, U.S.A. Department of...of Chemistry, and JILA, University of Colorado, Boulder, Colorado 80309, U.S.A. 3 Department of Geology...Geological Engineering, Colorado School of Mines, 1516 Illinois Street, Golden, Colorado 80401, U.S.A. 2 Abstract...syenogranite Silver Plume-type intrusion near Jamestown, Colorado (U.S.A.). Irregular-shaped centimeter- to |  | | Report (issue) | | Geology and Ore Deposits of the Front Range Colorado By T. S. LO\'ERING and E. N. GODDARD GEOLOGICAL...cooperation with the Colorado State Geological Survey Board and the Colorado Metal Mining Fund ~ oopr is...__________________________________________ _ 1 Summary of mining districts---.---------------------Introduction...gneiss and gneissic aplite ________ _ Quartz diorite and associated hornblendite_ Boulder Creek granite _________________..._____________________ _ Copper deposits in Jefferson County __ _ F. M.D. property _____________ _ Malachite |  | | Report (issue) | | Geology and Ore Deposits of the Boulder County Tungsten District Colorado GEOLOGICAL SURVEY PROFESSIONAL... Geology and Ore Deposits of the Boulder County Tungsten District Colorado By T. S. LOVERING and OGDEN TWETO...State of Colorado through the Colorado Geological Survey Board and the Colorado Metal Mining Fund UNITED...__________________________ Principal rocks of the district.________________________ Pre-Cambrian rocks__..._____ Age_ __________________________________ Boulder Creek granite and related rocks. ____ Distribution |  | | Journal (article/letter/editorial) | | TELLURIDE-TUNGSTEN MAGNOLIA MINERALIZATION MINING ALBERT DISTRICT, OF THE COLORADO. S. WILKERSON. ABSTRACT. Two...Two systemsof fissuresin the Magnolia Mining district of BoulderCounty,Coloradoare occupiedby ore deposits--anorthwest... HISTORY. The Magnolia mining district lies four miles southwestof Boulder,Coloradoand is a part of...northeastend of the Colorado mineral belt, which extends across the Colorado Front Range from Boulder and Jame...the World War. GENERAL GEOLOGY. The Magnolia district is almost entirely within the preCambriancomplexof |  | | Journal (article/letter/editorial) | | 1397–1424 Structural Geologic Evolution of the Butte District, Montana Robert A. Houston†,* and John H. Dilles..., Corvallis, Oregon 97331 Abstract The Butte district contains two porphyry Cu-Mo deposits and the younger...southwest Montana. New geologic mapping of the Butte district reveals three distinct episodes of deformation:...that are limited to the northwest part of the district and synchronous with the eruption of the Lowland...at depths of 2 to 6 km. The Butte Granite and Boulder batholith were emplaced at 79 to 76 Ma into thrust |  | | Report (chapter) | | LIBRARY South Platte District, Colorado · by Wm. B. Simmons and E. Wm. Heinrich Colorado Geological Survey...Survey Department of Natural Resources Denver, Colorado I 1980 Front cover: Wide Angle photograph of the...No. 2~ pegmatite, South Platte pegmatite district, Colorado. This striking example graphically illustrates...structural zonation of the pegmatites of this district. A fifty foot high column (40 feet across at the...RARE-EARTH PEGMATITE$ OF THE SOUTH PLATTE DISTRICT, COLORADO by Wm. B. Simmons, Jr. Department of Earth |  | | Journal (article/letter/editorial) | | 1007/s00710-016-0446-2 ORIGINAL PAPER Melt evolution in felsic dikes inferred from the composition of gahnite in two...occurrences, Pala Chief and Elizabeth R composite dikes, California Adriana Heimann 1 & Jason A. Yonts 1...Chief and Elizabeth R layered pegmatite-aplite dikes, Pala District, California, and the significance for...for felsic melt evolution. The aplite is characterized by alternating bands of white, finegrained plagioclase...laminations, which indicate a homogeneous melt at the aplite scale. Compared with the composition of gahnite |  | | Journal (article/letter/editorial) | | Stocks primarily by cauldron subsidence, with ring dikes and cauldron subbut accompanied by outward or upward...686 Lithonia gneiss (and Stone Mountain granite Boulder-San Juan discordant belt of pluof mesozone), Georgia...Prospect porphyritic granite gneiss (and tons, Colorado 687 Stocks of Concepcion del Oro, Mexico 689 Nonewaug...Nonewaug granite lens of mesozone), Boulder batholith, Montana 690 Connecticut 710 Seagull batholith... Cassia batholith, Idaho 692 La Plata stocks, Colorado 692 northeast section 713 Supplementary descriptions |  | | Journal (article/letter/editorial) | | Breccia formation was initiated when premineral dikes and surrounding andesitic country rocks were hydraulically...little to no meteoric component, as evidenced by the aplite matrix in the breccia and the proximity with the...1988; Carten et al., 1988a, 1993). At Henderson, Colorado, differences in the intensity of mineralization...Questa mine is located in north-central New Mexico, USA, in the Taos Range of the Sangre de Cristo Mountains... 1991). Mineralization and Questa Mine Geology Mining history and molybdenum deposits Molybdenum is the |  | | Report (issue) | | Beryllium Area, Park and Jefferson t:-1 Counties, Colorado g ~ s:p ~ I> li:tl ~ GEOLOGICAL SURVEY PROFESSIONAL...Flats) Beryllium Area, Park and Jefferson Counties, Colorado By C. C. HAWLEY GEOLOGY AND ORE DEPOSITS OF THE...SOUTHERN TARRYALL REGION PARK AND JEFFERSON COUNTIES, COLORADO GEOLOGICAL SURVEY PROFESSIONAL PAPER 608-A A...Amphibolite and hornblendite _______________ _ Boulder Creek{?) Granodiorite ______________ _ Silver Plume(...northeast-striking veins and ore along granite-aplite contact--------------------------------------- |  | | Journal (article/letter/editorial) | | accepted abstracts follow. THE GARNET LINE IN OXFORD COUNTY, MAINE, PEGMATITES. M. M. Felch, W. B. Simmons...intermediate and core zones in many of the Oxford County, Maine, pegmatites. This study primarily focuses...centuries. The garnet line plays an important role in mining these two localities, as it is a zonation indicator...similar to the model proposed for the San Diego County pegmatites (Webber et al. 1997, 1999). The garnet...nucleation in the formation of line rock in pegmatite-aplite dikes. Journal of Petrology 38:1777–91. Webber, K |  | | Journal (article/letter/editorial) | | mineralogy and paragenesis of pegmatites from San Diego County, California. He will also be remembered for his...a gem-quality rubellite specimen from the Pala district, spring 1991. 2. Gene Foord with his friend George...George Ashley at Hiriart Mountain, San Diego County, California, 1986. 3. Gene in Jackson, Wyoming, August...bucket at the San Diego Tourmaline Mine, San Diego County, California in 1974. 5. Boris Schmakin, Skip Simmons... Gene’s grandfather used his earnings from the mining ventures to purchase a smelter in Utah where he |  | | Journal (article/letter/editorial) | | Monzonitic Rocks in the Northwestern Part of the Boulder Batholith, Montana Abstract: The crystallization...monzonitic rocks in the northwestern part of the Boulder batholith from the magmatic to deuteric to hydrothermal...zones in aplite, in locally derived segregation pods, and in primary joints which postdate aplite. The same...statement Granogabbro Granodiorite Quartz monzonitc Aplite and alaskite Crystallization stages leading to...of the Boulder batholith, Montana . . . . 1259 2. Steps leading to vein formation in the Boulder batholith |  | | Report (volume) | | the Blue Lakes Wilderness Study Area, Humboldt County, Nevada U.S. GEOLOGICAL SURVEY BULLETIN 1726-D...the Blue Lakes Wilderness Study Area, Humboldt County, Nevada By JOEL R. BERGQUIST, DONALD PLOUFF, BRENT...the Blue Lakes Wilderness Study Area, Humboldt County, Nevada. U.S. Geological Survey Bulletin 1726-D...Lakes Wilderness Study Area (NV-020-600), Humboldt County, Nevada. CONTENTS Summary Dl Abstract 1 Character...investigations 3 Appraisal of identified resources 5 Mining history and production 5 Mines, prospects, claims |  | | Report (volume) | | claims_______________________________________ Pinal County _________________________ ------- ______ -----__..._____ ----------------------------__ Santa Cruz CountY---------------------------------------Santo Ni:iio...____ Yavapai CountY----------------------------------------------Copper Basin district _______ ------...-------------------------------------Calaveras CountY----------------------------------------White Horse...Horse claims, by H. K. Stager_ _____ El Dorado CountY---------------------------------------Consumnes |  | | Journal (issue) | | Museum, ME John Rakovan New Mexico Institute of Mining & Technology, Socorro, NM Consulting Editors Joel...Kampf, l.A. County Museum of Natural History, CA Virgil W. Lueth, New Mexico Institute of Mining & Technology...across a local area net\,vork. Subscription offices: USA/North America: Taylor & Francis Group, LLC, 530 Walnut...Copyright Clearance Center (www.copyright.com) in the USA or the Copyright Licensing Agency (www. cla.co.uk)...Limoeiro Mine, Virgem da Lapa, Ara~uaf Pegmatite District, . Minas Gerais, Brazil, Michael A. Menzies Signature |  | | Journal (article/letter/editorial) | | Inclusion Studies of GEM-Bearing Granitic Pegmatite-Aplite Dikes, San Diego Co., California Bruce E. Taylor I...Stanford University, Stanford, California 94305, USA aAbteilung Geochemie, Mineralogisches Institut, Universit/it...Germany Late Cretaceous, granitic pegmatite-aplite dikes in southern California have been known for gem-quality...samples, and inclusion fluids from nine of these dikes and from associated wall rocks have been analyzed...ascertain the origins and thermal histories of the dikes. Oxygen isotope geothermometry used in combination |  | | Journal (article/letter/editorial) | | PEGMATITES OF EIGHT MILE PARK, FREMONT COUNTY, COLORADOXT E. Wrrr. HerNnrcu, Department of Mineralogy...Hornblende gabbro. Pikes Peak granite .. . . . Aplite and fine-grained granite . . Diabase Injection...Park pegmatite district, three to twelve miles west of Canon City, Fremont County, Colorado, includes about...separate paper. 420 PEGMATITES OF EIGHT MILE PARK, COLORADO 42r area are flanked on the east by hogbacks...pegmatites. The youngest pre-Cambrian rocks are dikes of diabase. Veins are not common. The injection |  | | Journal (article/letter/editorial) | | KARLSON* Cotter Corporation,P.O. Box 1017, Golden, Colorado 80401 Abstract A detailedstudyof the geologyof...mineworkingsandgeologyis shownin / .:::::::::Jamestown:::. Figure 2. I COLORADO :::::::Gold oo0 ................(Tweto and Sims, 1963). Proterozoic faultsproCreek. Mining eventuallydescendedbelow the bot- movementalongthe...of the Front Rangeduringthe Late Cretain 1977. Mining alongthe steepvein systemhaspro- ceous-earlyTertiary...foliation;with the exceptionof pegmatitesand aplite dikes,crosscutting units that might representmetamorphosed |  | | Report (issue) | | acknowledgments.--------.---------------------Pegmatite mining in the region...________-__-__--__.______-_-_-General..._____________________ Dawley Canyon area, Elko County-______--_--_------_-_-_-_-_---_-_ Location and...____-_-_--_--------_--__---_---Albite granite and aplite.-..--------------------------------Structural features...dikes_____________-_-_-_-__------___-_-___-___-_ Pegmatite-aplite relations....___-_-_---_---_-___-__---__-_-_ Line...Pass. -__-_--__--_---__--_--_--__------White Pine County.-._____________________________________________ |  | | Report (volume) | | Bulletin 931-O NICKEL DEPOSIT NEAR GOLD HILL BOULDER COUNTY, COLORADO BY E. N. GODDARD AND T. S. LOVERING ...Springs formation.............................. 352 Boulder Creek granite................................ 353............................... 354 Pegmatite and aplite................................. 354 Early Tertiary...Generalized geologic map of the vicinity of Gold Hill, Colorado, showing-the regional setting of the Copper King...Copper King mine, Boulder County, Colorado..... In pocket Figure 37. Index map of Colorado showing the location |  | | Journal (article/letter/editorial) | | of the Little Three layered pegmatite-aplite dike, Ramona District, California Received: 24 March 1998...layered pegmatite-aplite bodies are characterized by ®ne-grained, sodic to granitic aplite that is usually...there currently is little concensus as to how such dikes form. The Little Three dike near Ramona, California...miarolitic zone, nor is there any indication that the aplite, graphic pegmatite, or miarolitic pockets represent...100 East Boyd Street, SEC 810 Norman, OK 73019, USA; Fax: (405) 325-3140; e-mail: gmorgan@ou.edu Editorial |  | | Report (volume) | | General Geology of the Mammoth Quadrangle Pinal County, Arizona By S. C. CREASEY GEOLOGICAL SURVEY ...Diabase______________________________________________________ Aplite and alaskite ________________ Apache Group____... GENERAL GEOLOGY OF THE MAMMOTH QUADRANGLE PINAL COUNTY, ARIZONA By s. c. CREASEY ABSTRACT The Mammoth...granodiorite, and subordinate amounts of alaskite, aplite, and diabase. The quartz monzonite and granodiorite...deep-seated plutonic rocks. The alaskite, aplite, and diabase form dikes and small irregular intrusives that |  | | Report (issue) | | granite Dikes penetrating the granites Acid dikes and veins Basic dikes Schistose dikes Diabase dikes Physical...properties of granite Dimension stone General ..' Dikes and veins : Segregations and inclusions Texture...Wilson County Contentnea Creek area Sims area Elm City area . Edgecombe and Nash Counties Pitt County Fountain...Richmond Counties The Wadesboro-Rockingham area Basic dikes Granites of the Piedmont Plateau Northeast Piedmont...Piedmont Granites of the Northeast Piedmont Wake County Raleigh granite area , The city quarries The Sutton |
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