 | | Journal (article/letter/editorial) | | SYENITE PEGMATITES, ROCKY BOY STOCK, BEARPAW MOUNTAINS, MONTANA Wrlrteu T. Pncone, Geologi.cal Survey...syenite. DescriptiveMineralogy Sanidine Nepheline. Sodalite. . . 4ll 413 4t3 Biotite. . . . 4r3 Garnet...of Tertiary alkalic rocks in the Bearparv Mountains, Montana. The pegmatites occur in the field as small...geologicalinvestigations of the Bearpaw Mountains of north-central Montana, the writer studiedseveral unusual...from these pegmatites are: sanidine, nepheline, sodalite, albite, biotite, aegirite, melanite, stilpnomeJane |  | | Report (issue) | | NOTES ON THE MINERAL DEPOSITS OF THE BEARPAW MOUNTAINS, MONTANA. By LEON J. PEPPERBERG. INTRODUCTION...an investigation of the Milk River coal field, Montana, during the field season of 1909, the writer had...number of mineral prospects located in the Bearpaw Mountains. The following notes are the result of this...specimens collected. Their studies show the Bearpaw Mountains to be rich in rocks of unusual types and of...White in 1882 from the southern foothills of the mountains, in the vicinity of Eagle Creek. Some of the sedimentary |  | | Journal (article/letter/editorial) | | with subordinate olivine-poor nephelinite and sodalite, leucite and glassy nephelinite differentiates...Lou†cná. Analyst P. Povondra. 4 = Sodalite phonolite, Klínovec Hill. Analyst P. Povondra. 5 = Orendite...phonolite (3) from Lou†cná and phonolite from Klínovec Hill (4). No. 2 3 4 Cs (ppm) Rb Sr Ba Ga* As* Sc...from pseudoleucites, (e.g. in the Highwood Mts., Montana; Larsen & Buie 1938), such relicts have not been...phonolite are compared with those of the Klínovec Hill sodalite phonolite (Table 1a, b and Fig. 1) and it is |  | | Journal (article/letter/editorial) | | minerals phases such as white mica, analcime, sodalite and cancrinite. From mineralogy and geochemistry...sometimes has been sometimes replaced by analcime, sodalite, white mica. Our petrographic, mineralogical and...such as white mica, cancrinite, analcime, and sodalite which usually replace original nepheline. The...altered to analcime, white mica, cancrinite and sodalite (Table 2). Kfeldspar. Composition of Kfeldspar...found in feldspars of the study area. Analcime and sodalite. These minerals are found as replacement product |  | | Journal (article/letter/editorial) | | leucite in glass 1118 2. Pseudoleucite from Bearpaw Mountains, Montana 1119 Table 1. Chemical analysis and...conditions is essential rocks of the Highwood Mountains, Montana, for an understanding of the genesis of all...of pseudoleucite specimens from the Bearpaw Mountains of Montana. The financial assistance of the National...Arkansas, were examined and a mixture of hauynite, sodalite, and a mineral discarded. All exhibited extensive...phenocrysts. Mountains and the Bearpaw Mountains of The hauynite and sodalite are apparently the Montana. The |  | | Report (volume) | | Geology of the Lloyd Quadrangle Bearpaw Mountains Blaine County, Montana ~y ROBERT GEORGE SCHMIDT. W....____________________ -----_____________________ Bearpaw Mountains structural arch _______________ ------ __...map and sections of the Lloyd quadrangle, Blaine County, Mont------------------------------------ In pocket...pocket FIGURE 13. Index map of north-central Montana, showing location of Lloyd and adjoining quadran...GEOLOGY OF THE LLOYD QUADRANGLE, BEARPAW MOUNTAINS, BLAINE COUNTY, MONTANA By RoBERT GEORGE ScHMIDT, W. |  | | Report (issue) | | eudialyte, epididymite, lº avenite, astrophyllite, sodalite, natrolite, analcime, aegirine. Distribution:...Langesundsfjord, and at Bratthagen, Norway. In the USA, at Magnet Cove, Hot Springs Co., and from Granite...Arkansas; in the Rocky Boy stock, Bearpaw Mountains, Hill Co., Montana; at Wind Mountain, Otero Co., New |  | | Report (issue) | | POSSIBILITIES IN THE PLAINS ADJACENT TO THE HIGHWOOD MOUNTAINS, MONTANA ______ By FRANK REEVES INTRODUCTION Scope...plains adjacent to the High wood Mountains, in north-central Montana, the main purpose of which was the...encircle the Bearpaw Mountains an isolated group about 60 miles northeast of the Highwood Mountains. In this...adjacent to the Bearpaw Mountains are present north and east of the Highwood Mountains. In the regional...Highwood Mountains, Mont.: U. S. Geol. Survey Bull. 237, 1905. Calhoun, F. H. H., The Montana lobe of |  | | Report (volume) | | GEOLOGY OF THE IGNEOUS ROCKS OF THE HIGHWOOD MOUNTAINS, MONTANA BY LOUIS VALENTINE PIRSSO1ST WASHINGTON...................... ......................... Montana formation ._-.......-.....---... --.---.-.--.-...systems...----....-.-.---.--...... 65 Pulaskose (sodalite-syenite) of Square Butte......-----.-..--.-.-..................... 121 Trachiphyro-pulaskose (sodalite-solvsbergite-porphyry)....... .... 121 Introductory...Page. PLATE I. Topographic map of the Highwood Mountains .........-..-.. . 14 II. A, View northward from |  | | Journal (article/letter/editorial) | | PEGMATITES OF E. WM. MONTANA. • HEINRICH. CONTENTS. PAGE Abstract .......................................................................... Montana pegmatite..................................................................................... Bearpaw pegmatites................................................ .. 332 332 333 334 334 ABSTRACT. Montana pegrnatitesare oœthree main age groups: pre-Beltian...stocksand Published bypermission oftheDirector, Montana Bureau ofMines andGeology. 307 308 E. WM. HEINRICH |  | | Journal (article/letter/editorial) | | nepheline, aegirine-rich clinopyroxene and FeK-rich sodalite. The high alkali concentrations relative to almnina...known Al-rich phenocryst phases (nepheline and sodalite) and some other process must be invoked. KEYWORDS:...(>1 man) of nepheline (up to 5 man) (~24 vol.%), sodalite (4.9%), combeite (1%), clinopyroxene (2.6%), titanite..., identified optically, is here identified as sodalite by electron-probe microanalysis (EPMA). Nepheline...combeite; Fig. 1a and b), J. B. DAWSON A N D P.G. HILL _l 180 PERALKALINE NEPHELINITE FI~. 1. Back-scattered |  | | Journal (article/letter/editorial) | | the feldspathoid minerals: leucite, nephelite, sodalite, and analcite; all except quartz containing aluminium...Yellowstone National Park. Crazy Mountains, Mont. Little Belt Mountains, Mont. * * DIAGRAM 5. DIAGRAM...DIAGRAM 6. Highwood Mountains, Mont. Bearpaw Mountains, Mont. ROCK CLASSIFICATION 97 does not occur...alumina, when and others in which alumina is in sodalite minerals abound;' excess, when muscovite forms...; WEED, W. H. and PIRSSON,L. V., The Bearpaw Mountains of Montana, Am. Jour. Sci., Vol. II, No. 9, 1896 |  | | Journal (article/letter/editorial) | | Montana Mineral Locality Index Downloaded by [University of Nebraska, Lincoln] at 20:00 09 April 2015...2015 K NOWN AS THE TREASURE STATE, Montana is rich in mineral and gemstone localities. The state motto...The middle third of the state is known as the Montana alkali province where the sediments have MICHAEL...Indian Queen mine ca. 1905 at Farlin, Beaverhead County. 208 ROCKS & MINERALS Downloaded by [University... the Rocky Mountains, and furthest to the northwest, the belt basin. The Rocky Mountains contain sedimentary |  | | Journal (article/letter/editorial) | | alkaline pegmatites from Gordon Butte, Crazy Mountains (Montana, USA): comparisons between potassic and sodic...Springer-Verlag 2002 Abstract At Gordon Butte (Crazy Mountains, Montana), agpaitic nepheline±syenite pegmatites intrude...Alkaline igneous rocks of central and western Montana (USA) exhibit great petrographic diversity, and are...Alkaline parageneses of dierent provenance from Montana have been shown to contain a variety of rare minerals...igneous lithologies of the Crazy Mountains area (south-central Montana), which include a sub-alkaline series |  | | Journal (article/letter/editorial) | | alkali granite. The per-alkaline rocks comprise sodalite foyaite, naujaite, lujavrite and kakortokite (USSING...were formed in two stages. In the first stage sodalite foyaite and naujaite crystallized in the upper...peculiar poikilitic textures. Small crystals of sodalite are enclosed in large anhedra of microcline, eudialyte...eudialyte, ægirine and arfvedsonite. The sodalite crystals are often so closely spaced that the above-mentioned...microcline and/or albite, nepheline and sometimes sodalite. Small crystals of eudialyte make up 2-10 0/0 |  | | Book | | Minerals .. . . . . . . . . . . . . . . . . . . .. Sodalite . . . . . . . . . . . . . . . . . . . . . . ............. Volcanic Fields of Highwood Mountains, Montana (USA) . . . . . . . . . . . . . . . . . . ....avaj o-Hopi Province (USA) . . .. Leucite-Bearing Rocks of Leucite Hills, Wyoming(USA) . . . . . . . . ....Highwood Mountains, Montana Villa Senni, Italy Villa Senni, Italy Leucite Hills, USA Leucite Hills, USA Leucite...Leucite Hills, USA Villa Senni, Italy Villa Senni, Italy Villa Senni, Italy Villa Senni, Italy Villa Senni |  | | Journal (article/letter/editorial) | | pp. 1005–1051 The Highwood Mountains potassic igneous province, Montana: mineral fractionation trends...dykes and lavas from the Highwood Mountains Igneous Province, USA were studied by electron-microprobe...Highwood Mountains potassic volcanic complex (Fig. 1) is part of a larger igneous province in Montana, USA...the contemporaneous nearby Bearpaw Mountains Complex. The Highwood Mountains Complex was first described...Generalized geological map of the Highwood Mountains volcanic complex, Montana, based on the maps of Hurlbut and |  | | Journal (article/letter/editorial) | | indicated on the accompanying map, figure 1, of Clinton county, New York, which shows them all with the exception...dike at Burke, Franklin county. They occur in greatest abundance on Rand hill, in Beekmantown and Altona...Altona town ships. The hill is an outlier of pre-Cambrian rocks projecting above the * K em p and M a r...feet on F i g u r e 1 . —Sketch Map of Clinton County, New York. Showing by heavy black line the Potsdam-pre-Cambrian...within a radius of less than 20 miles from Rand hill, the one at Burke alone excepted. The latter is |  | | Report (issue) | | ........ . Wet Mountains Area, Colorado ................ . Bearpaw Mountains, Montana .................... . Ravalli County, Montan81- Lemhi County, Idaho .. Magnet Cove and Potash Sulfur Springs, Ar· kansas...following six districts were investigated: (1) Wet Mountains, Colo.; (2) Powderhorn district, ColorFdo; (3)...California; (4) Bearpaw Morntains, Mont.; (5) Ravalli County, Mont., and Lemhi County, Idaho; and (6)...one such area, the Dismal Swamp placer in Elmore County, 10 EXPLANATION I 3 1 1 1 1 1 Placer locality |  | | Journal (article/letter/editorial) | | fall four specimens from the Elkhorn district, Montana, on the border of the Butte batholith, described...of the Elkhorn Mining District, Jefferson County, Montana," U.S. Geol. Surv., Ann. Rept., XXII, Part...feldspars, tially very small amounts of nephelite and sodalite, and considerable barkevikite and biotite. Furthermore...AssociatedGraniticRocksin the Vicinity of Salem, Essex County, Massachusetts," Bull. Essex Inst., XXIII (1891)...Washington, "The Petrographical Province of Essex County, Massachusetts," Jour. Geol., VII (1899), 53-56 |  | | Journal (article/letter/editorial) | | Christiania, Igneous 1894, p. 92. Rocks of Yogo Peak, Montana, Am. Jour Sci. (3) L, p. 478. 8 WM. H. HOBBS...classed with the nepheleneThe dunite from Elliott county, Kentucky5 is so low syenites. in silica and so...459-468, 1896. 3 WEED and PIRSSON: The Bearpaw Mountains of Montana, Am. Jour. Sci., (4), I, p. 357, 1896...1892. 5 J. S. DILLER: The Peridotite of Elliott County, Ky. Survey, pp. 1-29, 1887. 6 WILHELM RAMSAY:...lOC. cit. 7 WEED and PIRSSON: Missourite, Mountains of Montana. a New Leucite Bull. No. 38, U. S. Geol |  | | Book (edition) | | most of the field work on the Iron Hill complex of Gunnison County, Colorado, in 1912-1913. Although his...accepted the idea of an igneous origin for the Iron Hill carbonatite. In 1924 Bowen, who had visited the...Cove, Arkansas (Erickson and Blade, 1963), Iron Hill, Colorado (Olson and Wallace, 1956), Mountain Pass...southwestern Montana (Heinrich and Levinson, 1961), and the Bearpaw Mountains, Montana (Pecora, 1962)...and the core carbonatite is eccentric, as at Iron Hill, Colorado, or Songwe, Nyasaland. It is not to be |  | | Book | | 11s rocks n11d t!te dept!ts of the Enrt/1 . McGraw-Hill, New York. 598 pp. DAWSON, J . B . · t 980. Ki111/Jerlites...18 Rainbow Range 19 llgachuz Range 20 l tcha Mountains 2·1 Cariboo-Bell 22 Horsefly Creek 23 Takomkane...Rocks a11d Carbo11atites of the World biotite, sodalite and carbonate. A body of whi te, banded limestone...lumbia) Lying between the Rainbow Range and I tcha Mountains in the central Anahim Belt, the llgachuz Range...amidst Miocene and Quaternary plateau lavas. The mountains do not appear to have been studied in great detail |  | | Report (issue) | | composition of rocks of Y ogo Peak, Little Belt Mountains, Montana. i In 1896 Becke.i represented the chemical...-------- 79.25 Porphy&y ............. Harz Mountains ...................... R. T., 1861, i. 0. 057...062 .07~ . 085 .080 . 079 Blowing Rock, Watauga County, N.C. Fichtelgebirge, Bavarht .............. Crystal......... Montgomery County, N.C ............ Granitite ............. Eldorado County, C11l ..............Zealand ..... Alaskite .............. Tordrillo Mountains, Alaska ......... (.078) Qu~trtz-porphyry ... |  | | Journal (article/letter/editorial) | | .... 1046 Geological setting of the Highwood Mountains.................................................(1043) 1044 C. S. HURLBUT, JK .— HIGHWOOD MOUNTAINS Preferred theory of rock layering..............1108 1109 1111 Page Location of the Highwood Mountains.................................................laccoliths to the east and northeast of the Highwood Mountains are described. With one exception they have been...present. The only major exception is the hornblende-sodalite syenite from the top of Square Butte. In four |
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