 | | Report (chapter) | | SURVEY Rare-Earth Pegmatltes of the LIBRARY South Platte District, Colorado Ā· by Wm. B. Simmons and E. Wm...photograph of the Oregon No. 2~ pegmatite, South Platte pegmatite district, Colorado. This striking example...top of the core is corroded and replaced by a hematite-biotite replacement unit. Plate 3 is a geologic... Resource Series 11 RARE-EARTH PEGMATITE$ OF THE SOUTH PLATTE DISTRICT, COLORADO by Wm. B. Simmons, Jr. Department...Characterization. Albite ā¢ā¢ā¢ā¢ā¢ā¢ā¢ā¢ā¢ā¢ Fluorite ā¢ā¢ā¢ Hematite ā¢ā¢ Py ro 1 us i t e ā¢ā¢ Sericite and Muscovite |  | | Report (issue) | | of the Hartville Uplift, Goshen, Niobrara, and Platte Counties, Wyoming By George LĀ« Snyder Open-File...(9 m) with progressive upward concentration of hematite and clay within this weathered zone. Field exposures...Butte he HEMATITE of several ages (mainly ARCHEAN on map)āEarthy red purehematite and hematite schist deposits...stratigraphic or structural levels. Includes: (1) Pure-hematite deposits in pods near the contact between the... Good Fortune Mines) suggests that some of the hematite may be entirely due to ground water emplacement |  | | Journal (article/letter/editorial) | | which contain numerous inclusions of lustrous hematite. Hematite also occurs within the gypsum as millimeter-sized...some of the mines in the Butte, Montana, area. PLATTE PEGMATITE DISTRICT, COLORADO (USA), CONTAINING...in figure 1. Numerous pegmatites in the South Platte district, Colorado, at the northern end of the...relative to the South Platte pegmatite (square). and central part of the South Platte district contains...to more than 15 meters in diameter). The South Platte pegmatites are thought to result from a late-stage |  | | Journal (article/letter/editorial) | | Located in Sunrise, in the Hartville Uplift in Platte County, Wyoming, the mine was operated by the Colorado...about 2 miles beyond the bridge over the North Platte River; turning north on State Route 270 and GRACE...[New York University] at 08:47 12 May 2015 North Platte River Figun 2. Location map showing area around...the first, Native Americans mined red powdered hematite for use as ceremonial and war makeup during the...lifetimes-from 1900 to 1980. The iron-bearing ore is hematite occurring &he Silver Springs Schist that is interbedded |  | | Journal (article/letter/editorial) | | neighbors. Some, like the pegmatites of the South Platte district or the Mount Rosa Granite, are unique...goethite, goethitd quartz intergrowths ( āonegiteā), hematite (some ufter siderite), hornblende, luihunite,...and D. S . Collins (Eckel 1997) reported that hematite specimens from Cameron Cone often exhibit an arborescent...Figrrre 13. Pyrochlore gro~lths( āonegiteā), gold(?),hematite (some afrer siderite). and zircon from the microcline...with quartz, biotite, fluorite, goethite, and hematite in one Sentinel Rock pegmatite and translucent |  | | Report (volume) | | Geology of the Platte Canyon Quadrangle Colorado By WARREN L. PETERSON CONTRIBUTIONS GEOLOGICAL TO...Page PLATE 1. Geologic map and sections of the Platte Canyon quadrangle. _ In pocket FIGURE 1. Index...Index map of Colorado showing location of the Platte Canyon quadrangle.-..---------------------------------------C2...GEOLOGY OF THE PLATTE CANYON QUADRANGLE, COLORADO By WARREN L. PETERSON ABSTRACT The Platte Canyon quadrangle...many of the Laramide faults. INTRODUCTION The Platte Canyon quadrangle has an area of about 56 square |  | | Journal (article/letter/editorial) | | i i i A PY rope. Roff vermiculite deposit: .we Platte County. Shanton iron mine (sec. 8, T. I 8 N.. K...chrysocolla, covellite. galena, gold (native), hematite (variety specularite), malachite, pyrite, quartz...Kreisley (sec. 35): azurite, chalcocite, erythrite, hematite, malachite, and uraninite. War Bonnet copper district...chrysocolla, copper (native), cuprite, goethite. hematite (variety specularite), magnetite, malachite, pyrite...Postcard view of the Sunrise mine (about 1931), Platte County. John Taylor collection. Natrona County |  | | Report (issue) | | formation__________________________ Lytle and South Platte formations____________ Graneros shale, Greenhorn...ABSTRACT The Kassler quadrangle lies along the South Platte River on the east flnnk of the Colorado Front Range...urea are of marine origin. The Lytle and South Platte formations are predominantly beach sand, but contain...except for a small area northwest of the South Platte River that is in Jefferson County. The quadrangle...'---+--+--Ā„-....::S:!:p.:..:.ri:.:!ng~s:...._j South Platte R II R"d 1 ge 1pegmatite distric~sse II / ~ |  | ÄernĆ½, Petr, Chapman, Ron, Simmons, William B., Chackowsky, Leonard E. (1999) Niobian rutile from the McGuire granitic pegmatite, Park County, Colorado; solid solution, exsolution, and oxidation. American Mineralogist, 84 (5) 754-763 doi:10.2138/am-1999-5-607 | Journal (article/letter/editorial) | | converted the mineral assemblages to anatase + hematite + titanian-tungstenian ixiolite; primary ilmenite...oxidized into an anatase + hematite intergrowth. In both cases, the hematite component was almost completely...pegmatite, one of the outlying bodies of the South Platte pegmatite district, Jefferson County, Colorado...Heinrich 1980; Simmons et al. 1987). The south Platte pegmatite population is a typical representative...km southwest of the central cluster of the South Platte pegmatites and 6 km northwest of Wellington Lake |  | | Journal (article/letter/editorial) | | fluorite (Simmons et al. 2012). However, the South Platte pegmatites (Colorado) exhibit an astonishing REE...Xenotime-group species r r r Grayite vr Zinnwaldite r r c Hematite c c c Zircon c c r __________________________...associated with siderite replaced by goethite or hematite (or both). Bavenite typically forms inclusions...replaced by goethite or hematite (or both). In some instances, fine crystals of hematite and goethite have...pegmatites. Unlike the pegmatites of the South Platte district in Colorado (Simmons et al. 1987, 2011) |  | | Journal (article/letter/editorial) | | CpPcrgsmonJourds Geochemistry and evolution of the South Platte granite-pegmatitesystem, Jefferson County, Colorado*...revisedform December 15, 1986) Abstract-The South Platte pegmatite district is well known for its significant...distinct groups of pegmatites. INTRODUCIION TAE SOUTH PLATTE pegmatite district lies within tire Precambrian...Pikes Peak batholith near the former town of South Platte, Colorado (Figs. 1 and 2). The pegmatites of the...pluton-interior pegmatites from most other districts, South Platte pegmatites exhibit extensive replacement of primary |  | | Journal (article/letter/editorial) | | Brewster, R. H . , Metamict Samarskites from the South Platte Pegmatite District, Colorado, 458 British Columbia...Chamberlain, S. C , Three Occurrences of Specular Hematite in St. Lawrence County, New York, 127; Some Preliminary...Colorado, 457; Metamict Samarskites from the South Platte Pegmatite District, Colorado, 458; Mincat: A Mineral-Formula...Hanson, S. L . , Metamict Samarskites from the South Platte Pegmatite District, Colorado, 458 Hauck, R., book...Lyman House Memorial Museum, 386 Helvite, 377 Hematite, 127, 377, 450 Herd, R. K., Sapphirine from West |  | | Report (issue) | | plains in Colorado and southern Wyoming. The North Platte River rises in Colorado and flows northward into...Mountains. The largest tributary that enters the North Platte south of Casper is the Sweetwater River. This stream...of Wind River Peak and flows east to the North Platte River between the Rattlesnake Range on the north...and the Seminoe Mountains on the south. The North Platte a few miles south of its junction with the Sweetwater...off the high plains on the west from the North Platte River. The region stretching northeastward from |  | Gagnon, J. E., Samson, I. M., Fryer, B. J., Williams-Jones, A. E. (2004) THE COMPOSITION AND ORIGIN OF HYDROTHERMAL FLUIDS IN A NYF-TYPE GRANITIC PEGMATITE, SOUTH PLATTE DISTRICT, COLORADO: EVIDENCE FROM LA ICP MS ANALYSIS OF FLUORITE-AND QUARTZ-HOSTED FLUID INCLUSIONS. The Canadian Mineralogist, 42 (5) 1331-1355 doi:10.2113/gscanmin.42.5.1331 | Journal (article/letter/editorial) | | FLUIDS IN A NYF-TYPE GRANITIC PEGMATITE, SOUTH PLATTE DISTRICT, COLORADO: EVIDENCE FROM LAāICPāMS ANALYSIS...inclusion, LAāICPāMS, fluidārock reaction, model, South Platte District, Colorado. SOMMAIRE Nous avons Ć©tudiĆ©...rĆ©action rocheā eau, modĆØle, district de South Platte, Colorado. INTRODUCTION Hydrothermal processes...yttrium ā fluorine) granitic pegmatites in the South Platte District, Colorado (e.g., Simmons & Heinrich 1980...and description of the mineralogy of the South Platte NYF-type granitic pegmatites and fluoriteāREE mineralization |  | | Report (issue) | | Page Goethite Gold Gypsum Halite Halotrichite Hematite Jade Limestone Limonite Magnetite Marcasite Melanterite...Labradorite, Moonstone Garnet, Type II Occurrences. Hematite Ivory ] ade, Type II Occurrences. Nephrite ] ade...reducing environments. Oxide minerals, as limonite, hematite, and goethite, can form only in oxygen-rich, oxidizing...along the major drainages such as the Missouri, Platte, Niobrara, Republican, Blue, and Nemaha Rivers...and road cuts which occur on either side of the Platte River valley from Ashland, Saunders County, to |  | | Journal (article/letter/editorial) | | acicular and minute balls of GOETHITE. earthy hematite, quartz (Broadhead 1873b, 1877). Audrain County...along the creek east of Rushville and into northern Platte County and throughout the county: ARAGONITE,CALCITE...southwest of Fulton along Little Auxvasse Creek: hematite (specular and earthy), siderite (Crane 1912)....CALCITE, CHALCOPYRITE, DOLOMITE, GOETHITE, GYPSUM, hematite, jarosite, KAOLINITE, malachite, MARCASITE, PYRITE...BARITE, CALCITE, cerussite, chalcopyrite, dolomite, HEMATITE, GALENA, kaolinite, malachite, pyrite, quartz |  | | Journal (article/letter/editorial) | | to be a mixture of doverite, qlartz, xenotime,hematite, bastnaesiteand leucoxene.Smith el al. (1960)...minerals in the White Cloud pegmatite near South Platte, Colorado.Other rare-earthmineralsfound in the...Snowflakeand Black Cloud pegmatitesare in the South Platte-Lake Georgepegmatite district, Colorado, as are...cenositeand small amounts of iron oxides,mainly hematite. Optical data obtained on the doverite are (Na...mineralization in the White Cloud mine near South Platte, Jefferson County, Colorado (abst.), Bull. Geol |  | | Catalog/List | | to lĀ½" thick ........................ ā¢ EMERALD Austria or Russia Bright green single hexagonal crystal...of iron & manganese Colorado J efferson County, Platte Canyon Nearly pure brown black crystals and crystal...Brilliant black platy crystals with cuprite on hematite ........................... . DIAMOND Native Carbon...mass with reniform surface; associated with minor hematite, select ...................... . GOLD Native gold...cleavable aggregates, attractive ........ . Fl/R. HEMATITE Iron oxide Arizona Gila County, Aztec Peak Kidney |  | | Journal (article/letter/editorial) | | (yFeOOH), while leaving goethite (otFeOOH) and hematite (Fe20~) unaffected. Dithionite extracts all of...dithionite extractable Fe, representing gocthite and hematite, will be termed "crystalline Fe oxides." The author...Brazos Rio Grande, NM Missouri Colorado, TX Pecos Platte Rio Grande, TX 7.2 7.2 12.8 17.2 10.0 10.0 13...Brazos Rio Grande, NM Missouri Colorado, TX Pecos Platte Rio Grande, TX 2.7 39 57 50 1.2 150 2.2 13 26...Brazos Rio Grande, NM Missouri Colorado, TX Pecos Platte Rio Grande, TX 0.(100 0.063 0.064 0.(X)0 0.000 |  | | Book | | cosmetics, or as sources of color for ceramic glazes. Hematite and other iron oxides create reds and browns,...different optical properties. The play of colors on hematite comes from yery thin surface layers similar to...dripping mineral-laden solutions. a Botryoidal hematite with iridescent limonite coating, Parcocha Mine...and prism-shaped, somewhat resembling a pencil. Hematite, Frizington, Cumbria, England + 6 x 9x Ā§ cm Quartz...rocks; also found in quartz veins associated with hematite, chlorite and pyrolusite. Notable Localities |  | | Report (issue) | | Guernsey Reservoir, is situated along the North Platte River upstream from the town of Guernsey, Wyoming...eastern half of the reservoir and along the North Platte River. These sedimentary rocks are part of the...rich in iron and copper. Native Americans mined hematite, a soft iron-rich mineral often referred to as...(~2.6ā1.8 Ma), deposited by the Ancestral North Platte River, are exposed sporadically along valleys and | | | Book | | cosmetics, or as sources of color for ceramic glazes. Hematite and other iron oxides create reds and browns,...different optical properties. The play of colors on hematite comes from very thin surface layers similar to...resembling a pencil. wee. resemble kidneys. Hematite, Frizington, Cumbria, England Ā« 6 x 9 x 5 cm ...rocks; also found in quartz veins associated with hematite, chlorite and pyrolusite. Notable Localities...Sangerhausen, Saxony, Germany; Schladming, Styria, Austria. Asia: Ban Phuc nickel-copper deposit Vietnam |  | | Journal (issue) | | mounting that looked like a spherical piece of hematite; but on examination it proved to be a handsome...crystals ; bio tite in cleavage plates; limonite, hematite. spherosiderite, iserine (ti tanic iron) in rolled...ļ¬rst gold found in Colorado was taken out of the Platte River and Cherry Creek before it was traced up... Mining Engineer at Vordernberg, Province Styria, Austria, requests little pieces (splinters, fragments) |  | | Report (issue) | | Knepper, D.H.,, Jr. Gravel Deposits of the South Platte River Valley North of Denver, Colorado...........The study was conducted at two sites in the South Platte River valley, northeast of Denver, Colorado. One...other site was a transect across the entire South Platte River valley, and the subsurface geology here had...availability. 24 Gravel Deposits of the South Platte River Valley North of Denver, Colorado David A... Langer LOCATION, ORIGIN, AND MINING The South Platte River and its tributaries contain large deposits |  | | Journal (article/letter/editorial) | | syenite complex (WSC), in Wisconsin, the 1.0 Ga South Platte (SP), in Colorado, circa 1.6 Ga Trout Creek Pass...accessory minerals, Wausau complex, Wisconsin, South Platte, Trout Creek Pass, Colorado, Mojave, Arizona. ...syenite complex (WSC), Wisconsin, (2) the South Platte (SP) pegmatite district, in Colorado, (3) the Trout...of the Wausau syenite complex (WSC), the South Platte (SP) and the Trout Creek Pass (TCP) pegmatite districts...northern lobe of the Pikes Peak batholith, South Platte (Simmons et al. 1987, 1999a). Previous work has |
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