 | | Journal (article/letter/editorial) | | PEGMATITE, AND REPLACEMENT VEINS IN THE SHEAHAN QUARRY, GRANITEVILLE, MISSOURI* Cenr TollreN AND Seuunr S. Gor...Unilersity, St. Louis, Mo. INTRODUCTION Graniteville, Iron County, Missouri, has been for some time the most...center in the state. The Sheahan quarry located just north of Graniteville village is at present the...active one in the district. The quarry product is the distinctive "Missouri red granite" of pre-Cambrian...pegmatite, and replacement veins exposed in the quarry afforded material for a petrographic and chemical |  | | Journal (article/letter/editorial) | | SHERWOOD 106A East 25th, P. 0. Box 436 Oak Grove, Missouri 64075-0436 Downloaded by [Brown University Library]...Louis, Missouri 63129-2704 Figure 1. Counties in Missouri. N o comprehensive list of Missouri mineral...found in Missouri; two of these, fletcherite and starkeyite, were first described from Missouri mines....location a~ included at the end of each entry. Adair County Chariton River (40-04-05N 92-4 I -23W). septarian...septarian concretions about 2 miles north of the Macon county line. CALCITE crystals enclosing bundles of acicular |  | | Report (issue) | | Planetary Sciences Washington University St. Louis, Missouri 63130 SPECIAL PJPEB 915 1987 Uni versiw^ot Wyoming...A note on newly discovered kimberlites in Riley County, Kansas William L. Mansker, Bill D. Richards, and...petrography of the Twin Knobs ttl lamproite, Pike County, Arkansas . 205 Michael A. Waldman, Tom E. McCandless...age of large zircon crystals from the Potash Sulfur Springs igneous complex, Garland County, Arkansas Robert...emphasis on diamonds . 249 A.J.A. Janse and P. A. Sheahan Late Cretaceous nephelinite to phonolite magmatism |  | | Book (volume) | | Dahlonega Co. and Rabum Co., and the McDuffie County Belt extending through portions of McDuffie, Warren...Sphalerite. BALDWIN COUNTY MILLEDGEVILLE, at state farmjasper. BANKS COUNTY COMMERCE, along Hwy. 59...along adjoining Co. linerock crystal. BARROW COUNTY WINDER, along rd. to Jefferson and 1½ mi. inside...Guide for Rock Hounds in the United States BARTOW COUNTY AREA, Saltpeter Cave, as floatjasper. CARTERSVILLE:...pitsBarite, Geodes, Goethite, Hematite, Limonite, Iron minerals; area mines, as important producersBarite |  | Sheahan, C., Fayek, M., Quirt, D., Jefferson, C. W. (2016) A Combined Ingress-Egress Model for the Kianna Unconformity-Related Uranium Deposit, Shea Creek Project, Athabasca Basin, Canada. Economic Geology, 111 (1) 225-257 doi:10.2113/econgeo.111.1.225 | Journal (article/letter/editorial) | | Shea Creek Project, Athabasca Basin, Canada C. Sheahan,1,† M. Fayek,1 D. Quirt,2 and C. W. Jefferson3...December 7, 2014 Accepted: August 24, 2015 226 SHEAHAN ET AL. 1984; Kotzer and Kyser, 1995; Fayek et...pebbly Shiels, and sandy Larter members), 228 SHEAHAN ET AL. followed upward by the Wolverine Point...electron microscope (SEM). The SEM was 230 SHEAHAN ET AL. Perched 700 mbgs Unconformity Upper...typically indicates illite or kaolinite. 232 SHEAHAN ET AL. A. Quartz Host QB1 Pre-Mineralization |  | | Journal (article/letter/editorial) | | crystallization of the Animikie Red Ace Pegmatite, Florence county, northeastern Wisconsin: inclusion microthermometry...University, 314 Brooks Hall, Mount Pleasant, MI 48859, USA e-mail: sirbe1mc@cmich.edu Present Address: E. E...Grand Rapids, MI 49503, USA Disequilibrium crystallization Florence county pegmatite field Wisconsin...IN Florence Florence County Pegmatite Field BG GT MR QF BL GN MS Iron Mountain MG HL QD Norway...of northeastern Wisconsin including the Florence county pegmatite field (after Sims et al. 1992). Superior |  | Robles-Cruz, Sandra E., Watangua, Manuel, Isidoro, Leonardo, Melgarejo, Joan C., Galí, Salvador, Olimpio, Antonio (2009) Contrasting compositions and textures of ilmenite in the Catoca kimberlite, Angola, and implications in exploration for diamond. Lithos, 112. 966-975 doi:10.1016/j.lithos.2009.05.040 | Journal (article/letter/editorial) | | become an important producer of diamond (Janse and Sheahan, 1995; Read and Janse, this issue), with a significant...to the classification of Grütter et al. (2004), zircon (partly replaced by baddeleyite), chromian diopside...replacement. Ilmenite (Ilm), phlogopite (Phl), zircon (Zrn), calcite (Cal), apatite (Ap). 3.2. Anhedral...crystals, or intergrown with calcite, apatite, zircon and phlogopite (Fig. 2B). The ilmenite is usually...of Mn-rich ilmenite in the Elliott County kimberlite, Kentucky (USA) to Ca-enriched late fluids. Furthermore |  | Chi, G., Li, Z., Chu, H., Bethune, K. M., Quirt, D. H., Ledru, P., Normand, C., Card, C., Bosman, S., Davis, W. J., Potter, E. G. (2018) A SHALLOW-BURIAL MINERALIZATION MODEL FOR THE UNCONFORMITY-RELATED URANIUM DEPOSITS IN THE ATHABASCA BASIN. Economic Geology, 113 (5) 1209-1217 doi:10.5382/econgeo.2018.4588 | Journal (article/letter/editorial) | | ca. 1720 to 1710 Ma (Jeanneret et al., 2017). A zircon U-Pb age of 1644 ± 13 Ma has been reported from...McArthur River (Cumming and Krstic, 1992) Shea Creek (Sheahan et al., 2016) Sue Zone (Fayek et al., 2002a) Virgin...Lake (Cumming and Rimsaite, 1979) Shea Creek (Sheahan et al., 2016) Millennium (Cloutier et al., 2009)...Millennium (Cloutier et al., 2009) Shea Creek (Sheahan et al., 2016) Rabbit Lake (Cumming and Krstic,...2002a) Cigar Lake (Fayek et al., 2002b) Shea Creek (Sheahan et al., 2016) Millennium (Cloutier et al., 2009) |  | | Journal (article/letter/editorial) | | in the greenstone terrain near the famous Kiruna iron ores. Early exploration of this Pahtohavare Cu-Au...,,O,U,Hm~ I GREENSTONES j RCHEAN BASEMENT A IRON DEPOSIT 0 SULFIDE DEPOSrr . ... -" FAULT n L...conglomerate and the iron-ore bearing porphyries of Kiruna, which have an U-Pb zircon age ofc. 1.89-1.9t...has been included in a discussion of Proterozoic iron oxide (Cu-U-Au-REE) deposits, which also encompasses...400°C are needed to transport large quantities of iron in hydrotherreal solutions. At Pahtohavare, type |  | | Book (volume) | | 600 to 800 feet thick in the north. ALEXANDER COUNTY FAYVILLE, area stream gravels⎯agate, jasper, rare...⎯agate, jasper; d RR siding of Clay⎯agate. CALHOUN COUNTY AREA, shores of the Mississippi R., in the Warsaw...crystals). CRAWFORD COUNTY PALESTINE, area deposits⎯Siderite. EDWARDS COUNTY AREA, T. 1 S, R. 10 E...E, regional deposits⎯Siderite. FULTON COUNTY FARMINGTON, W 6 mi. on Rte. 116 to the Rapatee No. 5 strip...mine⎯pyritized gastropods (Pennsylvanian age). GRUNDY COUNTY AREA: c Regional rd. and RR cuts and banks of Mason |  | | Book (volume) | | 600 to 800 feet thick in the north. ALEXANDER COUNTY FAYVILLE, area stream gravels⎯agate, jasper, rare...⎯agate, jasper; d RR siding of Clay⎯agate. CALHOUN COUNTY AREA, shores of the Mississippi R., in the Warsaw...crystals). CRAWFORD COUNTY PALESTINE, area deposits⎯Siderite. EDWARDS COUNTY AREA, T. 1 S, R. 10 E...E, regional deposits⎯Siderite. FULTON COUNTY FARMINGTON, W 6 mi. on Rte. 116 to the Rapatee No. 5 strip...mine⎯pyritized gastropods (Pennsylvanian age). GRUNDY COUNTY AREA: c Regional rd. and RR cuts and banks of Mason |  | | Journal (article/letter/editorial) | | and metamorphic overprint, as constrained by U–Pb zircon, monazite, garnet, columbite and Rb–Sr muscovite...constrained by U–Pb analyses of primary magmatic zircon, monazite, garnet and columbite, and by Rb–Sr analyses...sites. b ZEV sample sites: WEN quarry, 700 m north of Wendersreuth; WIL quarry, 1.5 km west of Wildenreuth;...pit, 1 km NNW of Irchenrieth; OED large, active quarry near Oedenthal. c Sample sites in the Teplá crystalline...abandoned quarry, southern slope of Trdlina Moun- tain, 2 km east of Kříženec; ZHO abandoned quarry, 600 |  | | Journal (article/letter/editorial) | | 000 years ago, nearly all of Canada, the northern USA, northern Europe and alpine areas of South America...analyzed geochemically ŽFig. 3.. Scheelite and zircon may be counted under short-wave ultraviolet light...native gold, sulphides, scheelite, cassiterite, zircon, minerals from kimberlite and lamproite, and minerals...dispersal patterns at least 300 m down-ice from an iron formation-hosted gold deposit. Sibbick and Kerr...Mitchell, 1986; DiLabio and Thorleifson, 1993; Sheahan and Chater, 1993; Averill and McClenaghan, 1994; |  | | Journal (article/letter/editorial) | | majorite, ferropericlase, magnesiowustite, native iron, and moissanite. They are estimated to contribute...as inclusions in other robust minerals such as zircon and garnet. They are typically small, many being...have survived as inclusion minerals in garnet, zircon, and kyanite in ultrahigh-pressure metamorphic...has also been identified as an inclusion phase in zircon. Both diamond and graphite show a unique, as yet...from Birimian metasedimentary rocks (Janse and Sheahan, 1995), as do associated deposits at Bonsa and |  | | Journal (article/letter/editorial) | | (1993) slta 9 Springer-Verlag 1993 Gold-bearing iron-formation in a granulite terrane of the Canadian...14, 1993 Abstract. Gold occurs in metamorphosed iron-formation within a migmatized paragneiss terrane...arsenopyrite; (4) the proximity to a felsic pluton; (5) an iron-rich, fractured host-rock; and (6) a similar mineralization...(paragneiss, tonalitic and mafic orthogneiss, and iron-formation) and diatexite (terminology after Brown...tonalitic pegmatites are commonly associated. Banded iron-formation and tonalitic orthogneiss are intercalated |  | | Journal (article/letter/editorial) | | is also inferred from the data of Archaean banded iron formations and volcanogenic massive sulphide deposits...volcanic rocks of the Timiskaming Group. Detailed U-Pb zircon studies suggest that the Timiskaming Group was...in chemical compositions (Hattori 1989) and U-Pb zircon ages (~2680 Ma; Corfu et al. 1991) to those of...also inferred from the data from Archaean banded iron formations (BIF), described below. 191 36 35...depicts BIF sulphides (leachates) in ~2.7 Ga banded iron formations in the southern Abitibi greenstone belt |  | Liu, Jian-min, Zhao, Yue, Sun, Ya-li, Li, Dun-peng, Liu, Jian, Chen, Bai-lin, Zhang, Shuan-hong, Sun, Wei-dong (2010) Recognition of the latest Permian to Early Triassic Cu–Mo mineralization on the northern margin of the North China block and its geological significance. Gondwana Research, 17 (1) 125-134 doi:10.1016/j.gr.2009.07.007 | Journal (article/letter/editorial) | | Northern margin of the North China block Re–Os dating Zircon U–Pb age a b s t r a c t In this paper, we present...margin of the North China block, combined with U–Pb zircon ages of the host granites. The Re–Os isochron age...mineralization that has not been previously recognized. Zircon LA-ICP-MS U–Pb dating shows that the host granites...the northern NCB. Furthermore, the newly obtained zircon U–Pb ages indicate that emplacement of the host...this contribution, we present some new Re–Os and zircon U–Pb ages of both the Chehugou Cu–Mo deposit and |  | | Journal (article/letter/editorial) | | includetheerrorin thestandard age Reefsarea (the Sheahan-Grants, Frenchroans,and Cornish(1% on 77-600 hornblende...GilmOre Suture • u3 I 'P•"ak Hil Mt. AubreyHill Sheahan-Grants 32ø Creek Gidginb6• 36øm MELBOURNE...expected (about350øC;Harrison to datedirectlythe Sheahan-Grants deposit,whichis the and McDougall,1980;cf...Somecalciumcontamination ispresentin intrusions in the Sheahan-Grants andCopperHill areas(see theearlyandlaststeps...complexof dioriteand monzodiorite intrusions. At Iron plexhasa minimum ageof 447 _ 5 Ma. Chivas(pers.com- |  | | Journal (article/letter/editorial) | | massive sulfide area for which we have data is the iron-formation deposits(e.g.,the Adamsmine,near Ordovieian...•3 metasedimen v, VvV v v •vv 68 certaintiesin zircon, and other mineral U-Pb dates haverevolutioni...Geologicandfluidcharacteristics,in Robert, F., Sheahan,P. A., and Green, S. B., eds.Greenstonegoldandcrustalevolution...fromU-Pbdatingof hydrothermalminerals,in Robert, F., Sheahan,P. A., and Green, S. B., eds., Greenstone Inst...igneousgeochemistry, in McGraw-HillBookCo., 930 p. Robert, F., Sheahan,P. A., and Green, S. B., eds., Greenstone Maas |  | | Report (chapter) | | exploration in glaciated terrain (e.g. Mitchell 1986; Sheahan & Chater 1993; Averill & McClenaghan 1994; Helmstaedt...Ti-pyrope garnet, Cr~liopside, phlogopite, enstatite, zircon and olivine). Primary minerals include euhedral...Ti-pyrope, Mg-iimenite, Crdiopside, phlogopite, zircon and olivine); and, kimberlite-derived olivine,...COOPERSMWH, H. G. 1993. Diamond mine discovery. In." SHEAHAN, P. & CHATER, A. (chairmen) Diamond. Exploration...exploration samples: laboratory processing. In. SHEAHAN, P. & CHATER, A. (chairmen) Diamond." Exploration |  | | Map | | recognized a Guadalupe Mountains district in Otero County, but there is no evidence of mineral deposits in...million 98 >6.7 million long tons 19 1888–2014 * Iron 88 — 19 — 78 none 19 >$56.7 million 68...in the Old Placers (Santa Fe County) and Burro Mountains (Grant County) districts. The first mining...de Abalos in the Fra Cristobal Mountains, Sierra County on March 26, 1685 (Northrop, 1996), but there is...tungsten, manganese, beryllium, fluorite, vanadium, and iron were mined. Exploration for these commodities increased |  | | Journal (article/letter/editorial) | | 1007/s00126-006-0099-x ARTICLE Early Cretaceous U–Pb zircon ages for the Copiapó plutonic complex and implications...Candelaria open pit have been dated with the U–Pb zircon method. The new geochronological data indicate...emplacement. Plutonism temporally overlaps with the iron oxide Cu–Au mineralization (Re–Os molybdenite ages...sulfur to the hydrothermal system that caused the iron oxide Cu–Au mineralization. The age of the tonalite...Candelaria–Punta del Cobre . Chile . IOCG deposits . U–Pb zircon dating Introduction Magmas that formed the plutonic |  | Groves, D.I, Goldfarb, R.J, Gebre-Mariam, M, Hagemann, S.G, Robert, F (1998) Orogenic gold deposits: A proposed classification in the context of their crustal distribution and relationship to other gold deposit types. Ore Geology Reviews, 13 (1) 7-27 doi:10.1016/s0169-1368(97)00012-7 | Journal (article/letter/editorial) | | Stop 973, DenÕer Federal Center, DenÕer, CO 80225, USA c Wiluna Gold Mines Limited, 10 Ord St., West Perth...events Geochron. Refs. Southern Appalachians, USA 343–294 Paleozoic Late Ordovician to Carboniferous...This type of scenario crudely characterizes Alaska, USA, a part of the North American margin almost entirely...Horne ŽCanada ., Bousquet Ž Canada. , Greens Creek Ž USA . , Boliden ŽSweden . back-arc rift basins Ž Kuroko-type...orogenesis or, as in the Basin and Range of the USA, during post-orogenic extension, as shown schematically |  | | Journal (article/letter/editorial) | | imately 75 and140 m.y.youngerthancorresponding zircon U-Pbagesof 2725 _ 2 and2725_+az Ma. Botharrayspassabovea...agesdeterminedwith othergeochronological methods(e.g.,UPb zircon)havebeenreportedfor varioussuitesof maficandultramaficrocksby...THORPE,AND FRANKLIN younger than correspondingU-Pb zircon ages (Br•vart et al., 1986; Dupr• andArndt, 1990)...which are significantly youngerthancorresponding zircon U-Pbages(Table2). All samples takentogetheryield...whichhasintruded the Flavrian and Northwest Formations. U-Pb zircon Pbisotopefieldfor Norandagalenas (Fig.4a);and(5) |  | | Journal (article/letter/editorial) | | whereoverprintedby transitionalstagesericiticalteration. A U-Pb zircon age from the Camriomonzoniteindicatesthat the stockwasemplacedat...uppercrustsuggests that many,andper- tweengraywacke,iron-formation, andconglomerate hapsmost,gold depositsin..."' Graywacke +++l•-' • Diorite sills I• Orebody Iron formation :.• Volcanic rocks /•ø Trend/plunge ofCamflo...earlierstagesandconsistof tourmaline ered. The zircon grainsare euhedraland include veinlets,quartz-pyriteveinlets...tained titanitc. were absent. A small amount of zircon was recovTitanitccrystals in main-stage goldquartzveinsare |
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