 | | Thesis/Dissertation | | mapping technique in the Italian Mountain area, Colorado Item Type text; Thesis-Reproduction (electronic)...MAPPING TECHNIQUE IN THE ITALIAN MOUNTAIN AREA, COLORADO By Henry Albert Truebe A Thesis submitted to...tectonic setting of the Italian Mountain area in Colorado. . . . . . . . . . : ................... 2 Generalized...hydrothermal deposits............. 37 6. Relation of rock type to zone mineralogy................ 44 vii...mapped by dividing the Italian Mountain area, Colorado into 884 100-meter grid spaces and inventory |  | | Book | | Netherlands. Special regulations for readers in the USA — This publication has been registered with the Copyright...made in the USA. All other copyright questions, including photocopying outside of the USA, should be referred...produced by the replacement of previously formed rock types. This is obvious for ore endoskarns (e.g....all the plutonic suite which includes granite, granodiorite, quartz monzonite, quartz diorite and trondjemite...all the plutonic suite which includes granite, granodiorite, quartz monzonite, quartz diorite and trondjemite |  | | Report (issue) | | the Aspen 15-minute Quadrangle, Pitkin and Gunnison Counties, Colorado By BRUCE BRYANT GEOLOGICAL SURVEY...A study of an area at the intersection of the Colorado mineral belt with the west flank of the Sawatch...the Aspen 15-Minute quadrangle, Pitkin and Gunnison Counties, Colorado (Geological Survey Professional...Bibliography: p. 123 1. Geology Colorado Aspen region. 2. Mines and mineral resources Colorado Aspen region. I. Title...Tertiary igneous rocks ............................ Granodiorite ........................................ Alteration |  | | Journal (issue) | | Bandy Minerals of the Italian Mountain area, Colorado .................................... 75 by H...................................... 95 by J. S. White Kornerupine and sapphirine crystals from the Harts...R. Kampf Natural History Museum of Los Angeles County Arthur Roe Tucson, AZ Abraham Rosenzweig University...incrusted areas they looked not unlike a field of white flowers, the only feature out of character was the...only heat. It was covered with iron oxide and some white material that might be caliche or it might be an |  | | Journal (article/letter/editorial) | | Date-Nagai mine is genetically related to the granodiorite batholith of the Iidateyama body. Skarn is developed...pelitic hornfels and marble that remains as a small roof pendant body directly above the granodiorite batholith...garnet, garnet-epidote, and vesuvianite-garnet zones, from marble to hornfels. Sheelite is included in garnet...garnet, garnet-epidote, and vesuvianite-garnet zones. The oxygen isotope values of skarn minerals were...as δ18O = 4.2–7.7‰ for garnet, 5.9–6.9‰ for vesuvianite, −0.3–3.4‰ for scheelite, 6.0–10.9‰ for quartz |  | | Journal (article/letter/editorial) | | metamorphism of interbedded marble and calc-silicate hornfels, Twin Lakes area, central Sierra Nevada, California... johns Hopkins University, Baltimore, MD 21218, USA ABSTRACT In the Twin Lakes area, central Sierra...reaction pathways were deduced for marble and hornfels on isobaric T-X,,, diagrams in the model system...metamorphism of 16 years, average in situ metamorphic rock permeabilities, D in the hornfelses. D in the marbles...however, rely on poorly known parameters such as rock permeability in active metamorphic systems. An alternative |  | Ray, G. E., Webster, I. C. L., Ballantyne, S. B., Kilby, C. E., Cornelius, S. B. (2000) The Geochemistry of Three Tin-Bearing Skarns and TheirRelated Plutonic Rocks, Atlin, Northern British Columbia. Economic Geology, 95 (6) 1349-1365 doi:10.2113/gsecongeo.95.6.1349 | Journal (article/letter/editorial) | | belonging to the allochthonous Cache Creek terrane. Hornfels adjacent to the intrusive bodies host three Sn-bearing...having an extensive distal skarn with garnet-vesuvianite-pyroxene veins and a much smaller proximal ribbon...dominated by either magnetite, garnet, fluorite, or vesuvianite. Some of its skarn silicates contain elevated...skarns, and their garnet, clinopyroxene, and vesuvianite assemblages. † Corresponding author: e-mail...similar to those described elsewhere as “ribbon rock” or “wrigglite” (Jahns, 1944; Askins, 1975; Kwak |  | | Report (issue) | | intruded rocks and to a less extent on the granitic rock itself, by which the rocks are altered to or replaced...Morango district, Calif.; 5, Weldon, Calif.; Humboldt County, 6, Glendale, Calif.; 7, Darwin, Calif.; 8, Bishop...made to develop a deposit in Euby Valley, Elko County, Nev., and in the same month COFTACT-METAMORPHIC...Lovelocks, Nev., where a mill was built by the Humboldt County Tungsten Mines & Mills Co. Other claims were located...contact between a body of granular quartzose intrusive rock and other rocks, chiefly limestones. However, as |  | | Journal (article/letter/editorial) | | hornblende-biotitegranite, quartz-monzonite, granodiorite, quartz-porphyry and quartz-porphyrite. Little...is sufficient to note here that the extensive granodiorite Contact Metamorphism near Marulan, N.S. W...Here, just on the edge of the plateau, the igneous rock cuts across the strike of the Silurian sediments...the presence of such minerals as wollastonite, vesuvianite, diopside, and garnet in the calc-silicate rocks...that known locally as the " concertina rock ", a banded rock which has weathered differentially to give |  | | Journal (article/letter/editorial) | | Printedin Xortlwu lrelan~i Data of rock analyses-VI Bibliograghyand index of rock analyses in the periodical...another for England and Wales. No analysis of a rock from an English or Welsh locality appears in the...the eleven countries or areas represented, and & rock-name index to the 397 analyses contained in the...of the previously published parts of the “Data of rock analyses” series is given on page 147. PERIODICAL...Survey. 136 Society, Transactions end Data of rock analyses-VI Geological Society of Glasgow, Transactions |  | | Report (issue) | | UUrUUHIC Geology of the Midnite uranium mine, Stevens County, WashingtonA preliminary report By J. Thomas Nash...Uranium in metapelites Uranium'in calc-silicate hornfels Uranium in amphiboliteUranium in granitic rocks...Generalized geologic map of part of southern Stevens County showing relations of Precambrian and intrusive... GEOLOGY OF THE MIDNITE URANIUM MINE, STEVENS COUNTY, WASHINGTON A PRELIMINARY REPORT By J. Thomas...side by unmineralized intrusive ribs of granitic rock, and thickest mineralized zones invariably occur |  | | Report (issue) | | _________________ ___. Nevada ___________ Elko County. - ______ ... _ Star mine, Harrison Pass _____... Tuscarora Range _____ _ ._. ________ Humboldt County Golconda manganese-tungsten depositNorth workings...naine________________ Mine near Green Talc mine. _____ Nye County ____ _._-___-________-___ Gabbs area __ _____________________..._____ Brucite and magnesite deposits. __ Pershing County __ Rocks in the West Humboldt Range ..~ Limerick...and California Continued Nevada Continued White Pine County.._________________ Cherry Creek district______________ |  | | Journal (article/letter/editorial) | | THE MARYSVILLE GRANODIORITE STOCK, MONTANA Aoorpu KNorl, Yale Lln,iaersity,I{ew Haaem,Comecticut.... Ansrpacr The Marysville granodiorite stock of Montana is six miles north of the northern end of the...is composite, consisting of granodiorite, qlrartz monzonite, tonalite, white granite, muscovite granite...mining district geographically 834 MAR]ISVILLE GRANODIORITE STOCK, MONTANA 835 associatedwith it and becauseof...miles north is the Marysville stock, a body of granodiorite of 3 square miles surface exposure,rvhich is |  | | 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 |  | Marincea, Ştefan, Dumitraş, Delia-Georgeta, Sava, Cristina, Hatert, Frédéric, Dal Bo, Fabrice (2020) Mineralogy of a High-Temperature Skarn, in High CO2 Activity Conditions: The Occurrence from Măgureaua Vaţei (Metaliferi Massif, Apuseni Mountains, Romania) Minerals, 10 (8) 677 doi:10.3390/min10080677 | Journal (article/letter/editorial) | | diopside/wollastonite + Ti-poor grossular + diopside + vesuvianite/gehlenite + wollastonite + Ti poor grossular...endoskarn)/wollastonite + vesuvianite + garnet (inner exoskarn)/wollastonite + Ti-rich garnet + vesuvianite + diopside...retrogression of the peak paragenesis toward vesuvianite, hydroxylellestadite (or Si-substituted apatite)...gehlenite; wollastonite-2M; monticellite; diopside; vesuvianite; superposed parageneses; Măgureaua Vaţei; Romania...such as garnets [9–11], wollastonite [12] or vesuvianite [13,14] in high-temperature skarns. This paper |  | | Journal (article/letter/editorial) | | Federation US Geological Survey, Denver, CO 80225, USA d Far East Geological Institute, Far East Branch...pyroxene, formed in the skarn deposits. Garnet and vesuvianite, associated with tin skarn deposits, have high...Ore-bearing skarns are lense-like bodies along the hornfels-marble contact, and rarely in the granite-marble...is not exposed. Sedimentary rocks are cut by granodiorite-porphyry dikes. Primary skarn minerals are intensively...marble (Litvin 1959). The major pluton phase is granodiorite and quartz monzonite, whereas the marginal phase |  | | Journal (article/letter/editorial) | | BARITE AND WITHERITE FROM NEAR EL PORTAL' MARIPOSA COUNTY, CALIFORNIA A. A. Frrcn CONTENTS +6r Locetror...supposedly late Jurassic. Biotite-Lornblende granodiorite is the major rock type of the bossin association with...diorite, occurs marginally and as autoliths in the granodiorite. The veins, which vary in width up to twenty...fi,ne-grained barite, or massesof quartz-pyrite rock. WtrnBnrrp. Witherite occurs, as does the barite...observed are: Andradite Hedenbergite Actinolite Vesuvianite Anorthite Clinozoisite Calcite Other minerals |  | | Other Paper | | of Geology, Smith College, Northampton, MA 01063 USA Roberto Banda Monsivais, Hector F. Gonzalez Ramirez...composition of Upper Cretaceous to Lower Tertiary age. Granodiorite bodies are of two epochs, one at 85.0 Ma and...are relatively fresh but zones of alteration, hornfels, marble and skarn are developed adjacent to some...of the Piedras Verde Granodiorite Igneous Rocks The Piedras Verde Granodiorite and related dikes and...five textural variants of the Piedras Verde Granodiorite span a considerable compositional range but |  | | Journal (issue) | | ..................... 284 287 288 293 353 A hornfels unit in the Poudrette quarry ...................important for the collector to recognize the various rock units which represent the unique mineralogical environments...mountain lies about 40 km east of Montreal in Rouville County, Quebec, very close to and clearly visible from...mountain, he briefly mentioned several rare, accessory, rock-forming minerals including a lavenite-like and a...quarries, on the west. The once prominent wall of rock dividing the quarries, has been eliminated in recent |  | Mao, J.W., Pirajno, F., Xiang, J.F., Gao, J.J., Ye, H.S., Li, Y.F., Guo, B.J. (2011) Mesozoic molybdenum deposits in the east Qinling–Dabie orogenic belt: Characteristics and tectonic settings. Ore Geology Reviews, 43 (1) 264-293 doi:10.1016/j.oregeorev.2011.07.009 | Journal (article/letter/editorial) | | belt. Stage 1 (Late Triassic) Deposits/ore spots County Longitude, latitude Ore element association ...continued Deposits/ore spots Ore textures Wall rock Ore-controlling structures Related igneous body...Jurassic–Early Cretaceous) Deposits/ore spots County Longitude, latitude Ore element association ...Jurassic–Early Cretaceous) Deposits/ore spots County Nannihu – Sandaozhuang Shangfanggou Maquan Luocun...continued Deposits/ore spots Ore textures Wall rock Ore-controlling structures Related igneous body |  | | Journal (article/letter/editorial) | | A • Outcrop of Li Limestone or Ca/c j///ca te - rock. x Outcrop of other Schists. s£ Oip, /ow. iX Dip...ABERDEENSHIRE. 559 describes a scapolite-bearing rock from Gellan in Lower Deeside. H. H. BEAD (5, 6)...occurred at the time of intrusion of the parent rock of the hornblende-schists become of prime importance...sphene, ilmenite, and pyrites. At its margin the rock is infolded with the limestone and is schistose;...mm. * Figures within square brackets [ ] refer to rock-slices deposited in the Sedgwick Museum, Cambridge |  | Gilg, H. A., Lima, A., Somma, R., Belkin, H. E., De Vivo, B., Ayuso, R. A. (2001) Isotope geochemistry and fluid inclusion study of skarns from Vesuvius. Mineralogy and Petrology, 73 (1) 145-176 doi:10.1007/s007100170015 | Journal (article/letter/editorial) | | Napoli, Italy 3 U.S. Geological Survey, Reston, VA, USA With 8 Figures Received March 1, 2000; revised version...clinopyroxene, Mg-rich and Ti-poor phlogopite, F-bearing vesuvianite, wollastonite, gehlenite, meionite, forsterite...¯uid inclusions were observed in wollastonite, vesuvianite, gehlenite, clinopyroxene and calcite: a) primary...have been discovered in these rocks, such as vesuvianite (idocrase), periclase, davyne or cuspidine among...petrological debate on the importance of carbonate wall rock assimilation to magma composition and evolution |  | | Journal (article/letter/editorial) | | feet O.D.) and, passing from Cascade County into Meagher County, starts a long and gradual descent into...miles a series of sections reveal that the country rock is here cut by igneous intrusions with interesting...from the cross-cutting relationship of the igneous rock in Text-fig. 2, it 1 Numbers in parentheses refer...passage is sometimes gradual from lime-silicate rock—> marble —-> limestone, but is often surprisingly...of the A Contact Zone in Montana. 221 igneous rock in Text-fig. 1, unaltered limestone occurs only |  | Jingwen, Mao, Hongyan, Li, Shimazaki, Hidehiko, Raimbault, Louis, Guy, Bernard (1996) Geology and Metallogeny of the Shizhuyuan Skarn-Greisen Deposit, Hunan Province, China. International Geology Review, 38 (11) 1020-1039 doi:10.1080/00206819709465379 | Journal (article/letter/editorial) | | grossular-diopside hornfels, wollastonite hornfels, diopside hornfels, wollastonite-vesuvianite hornfels, muscov...muscovite-K-feldspar-anorthite hornfels, and prehnite-vermiculite hornfels. Because of the subsequent strong...and are composed mainly of garnet, pyroxene, vesuvianite, and wollastonite, with interstitial fluorite...fluorite-magnetite-salite rock, magnetite-fluorite-amphibole rock, and magnetite-fluorite-chlorite rock. The retrograde...through fluorite-magnetite-salite rock, to magnetite-fluorite-chlorite rock frequently can be recognized in |  | | Journal (article/letter/editorial) | | Grenvillian calcitic marble, serpentine marble, grey-white calcitic marble and silicified metawacke (MacKinnon...titanite, Tr tremolite, Tur tourmaline, Ves vesuvianite, Wo wollastonite, Apy arsenopyrite, Cp chalcopyrite...calcite concentrated along fracture planes Biotite hornfels Sedimentary=Volcanic Pl þ Mu þ Ksp þ Cal þ Ep...in thin-sections Comments Mineral association Rock-type Table 1. Mineral assemblages of samples studied...1994). This unit is fine- to coarse-grained, and white or pale-grey in outcrop (Figs. 3a, b). Much of the |
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