 | | Book | | Gottfried-Wilhelm-Leibniz University Hannover, Germany Responsible Series Editor: F. Pirajno ISSN 1876-1682...much biased by science with too little sense of mine for beauty) will keep his memory and work, alive...rocks in the Bohemian Massif, which is shared by Germany, the Czech Republic, Poland and Austria, has been...Reinhardsrieth Aplite) have been found and several abandoned mines and outcrops were re-sampled together with the “nigrine”...the region are not very promising and mining in Germany is obviously a profession of the past, but learning |  | | Journal (article/letter/editorial) | | from Charles E. Hill, owner of the Arizona Agate Mines at Cave Creek, Maricopa Co., Ariz., is the following...occur at shipping many tons and the mine shows the old Lane bismuth mine, at Monroe, promise of being another...(fluorDELAWARE — Gray cleavable masses ite) from this mine is of all colors and of orthoclase have been found...just like a 20 inch quartzite band which has been mine. I have been informed so many injected and locally...KANSAS—Beautiful agates have been found in a gravel pit near Concordia, Cloud Co., Kansas. KENTUCKY — Bob Barnes, 3930 |  | | Journal (issue) | | Hart Gem-A, London Karl Schmetzer Petershausen, Germany Ulrich Henn German Gemmological Association, Idar-Oberstein...Lore Kiefert Gemmology Consulting, Heidelberg, Germany Hiroshi Kitawaki Central Gem Laboratory, Tokyo...Elisabeth Strack Gemmologisches Institut Hamburg, Germany Tay Thye Sun Far East Gemological Laboratory, Singapore...as Beads for Necklaces Although the Benitoite Gem mine in California, USA, has been closed since 2005 (Laurs...was obtained decades ago from the Benitoite Gem mine in California, USA. Photo by Orasa Weldon. new |  | Küster, Dirk, Romer, Rolf L., Tolessa, Dandena, Zerihun, Desta, Bheemalingeswara, K., Melcher, Frank, Oberthür, Thomas (2009) The Kenticha rare-element pegmatite, Ethiopia: internal differentiation, U–Pb age and Ta mineralization. Mineralium Deposita, 44 (7) 723-750 doi:10.1007/s00126-009-0240-8 | Journal (article/letter/editorial) | | spodumene-bearing upper zone. A monomineralic quartz unit is discontinuously developed within the upper zone. Whole-rock...~36, K/Cs ~440, Al/Ga ~2,060, Nb/Ta ~2.6) to the upper zone (K/Rb ~19, K/Cs ~96, Al/Ga ~1,600, Nb/Ta ~0...of increasing fractionation from lower zone to upper zone were obtained in muscovite (K/Rb 23–14, K/Cs...Kenticha pegmatite and the Ta mineralization in its upper part are principally attributed to upward in situ...High MgO contents (up to 5.05%) in parts of the upper zone are the result of postmagmatic hydrothermal |  | | Book | | Justus-Liebig-Universität Senckenbergstrasse 3 35390 Giessen Germany K. WEBER Institut für Geologie und Dynamik der...Göttingen Goldschmidtstrasse 3 37077 Göttingen Germany Cataloging-in-Publication D a t a applied for...international conference in G6ttingen/Giessen, Germany. Discussions were focused on the Tectonothermal...Geological Survey of Hessen Leberberg 9 65193 Wiesbaden Germany V. BACHTADSE Institut fur Allgemeine und Angewandte...Ludwig-Maximilians-U niversitat Theresienstr. 41 80333 Munchen Germany M. BANAS University of Mining and Metallurgy AI |  | | Journal (article/letter/editorial) | | Champtoceaux Complex, south Brittany, has yielded an upper intercept age of 2208 f 39 Ma. This age is interpreted...intermediate rocks of talc-alkaline magmatic series. The lower ‘intercept on the concordia diagram is interpreted...than 840 Ma. Taken in conjunction with published upper intercept ages of 1300 Ma for the eclogite protoliths...inherited zircons in Palaeoz,oic formations with upper intercept ages around 2.5 Ga; (2) eclogite protoliths...richer in U and also more discordant on a U-Pb concordia diagram (Fig. 2; Table I). All the fractions taken |  | | Journal (article/letter/editorial) | | Frog Pond adit (2709.11 ± 0.56 Ma), East Boulder mine (2709.28 ± 0.32 Ma), and West Fork area (2709.00...assemblages (Nunes and Tilton, 1971; Page, 1977). The upper portion of the intrusion, which is missing along...Stillwater Mine BB Iron Cre r il C ree k ST11-16 ek LM We st F ish ta Rive CRM IM CP k For... 109°55' W PPZ OB2 3 110°0' W East Boulder Mine lder Stillw Banded series Middle 4 AN2 River...ater . Stillw s Co Gras 6 110°10' W et Swe A. Upper 110°15' W GN3 Rock Types K A Ni 110°10' W unconsolidated |  | | Journal (article/letter/editorial) | | niversity Mainz, D-55099 Mainz, Becherweg 21, Germany a r t i c l e i n f o Article history: Received.... . . . . . . . . . . . . . . . . . . . . . . . Iron . . . . . . . . . . . . . . . . . . . . . . . ..... . . . . . . . . . . . . . . . . 9.2. Magmatic iron deposits . . . . . . . . . . . . . . . . . . . ...Structure-related iron deposits . . . . . . . . . . . . . . . . . . . . . . . . . 9.4. Sedimentary iron deposits...Metamorphic iron deposits. . . . . . . . . . . . . . . . . . . . . . . . . . . 9.6. Iron supply and use | | | Journal (article/letter/editorial) | | niversity Mainz, D-55099 Mainz, Becherweg 21, Germany a r t i c l e i n f o Article history: Received.... . . . . . . . . . . . . . . . . . . . . . . . Iron . . . . . . . . . . . . . . . . . . . . . . . ..... . . . . . . . . . . . . . . . . 9.2. Magmatic iron deposits . . . . . . . . . . . . . . . . . . . ...Structure-related iron deposits . . . . . . . . . . . . . . . . . . . . . . . . . 9.4. Sedimentary iron deposits...Metamorphic iron deposits. . . . . . . . . . . . . . . . . . . . . . . . . . . 9.6. Iron supply and use |  | | Journal (article/letter/editorial) | | the sill (e.g., past-producing MaskwaDumbarton mines). In this study, we report a U-Pb age (chemical...1955) and is host to base metal (MaskwaDumbarton mines), chromite (Chrome property, Page property), and...and rare element-bearing pegmatite (Tanco mine) ore deposits. Anomalous concentrations of the platinum...basaltic flows and intercalated gabbro, tuff, and iron formation (Gilbert et al., 2008). The sill is exposed...Tanco Ta-Li-Cs Bernic Lake Bird Birse Lake Deposit/Mine 0 50°23’ 95°14’ 4 kilometers Undifferentiated |  | Ling, Xiao-Xiao, Schmädicke, Esther, Li, Qiu-Li, Gose, Jürgen, Wu, Rui-Hua, Wang, Shi-Qi, Liu, Yu, Tang, Guo-Qiang, Li, Xian-Hua (2015) Age determination of nephrite by in-situ SIMS U–Pb dating syngenetic titanite: A case study of the nephrite deposit from Luanchuan, Henan, China. Lithos, 220. 289-299 doi:10.1016/j.lithos.2015.02.019 | Journal (article/letter/editorial) | | Erlangen-Nürnberg, Schlossgarten 5a, D-91054 Erlangen, Germany c School of Gem Studies, China University of Geoscience...minor and accessory phases of calcite, apatite, talc, titanite and others. Despite being rare in quantity...formation. The age of zircon can be considered as the upper limit for the age of nephrite (Liu et al., 2015;...phases are calcite, titanite, actinolite, serpentine, talc, diopside, rutile, quartz, chlorite, pyrite, and...Pyrite; Qtz Quartz; Rt Rutile; Srp Serpentine; Tal Talc, Tr Tremolite; Ttn Titanite. 291 Sample N11 is |  | | Journal (article/letter/editorial) | | Moldanubicum of the Area Lam-Deggendorf, Eastern Bavaria, Germany Borwin Grauert, Ruedi H/s and Gorica Soptrajanova*...and the Ordovician metamorphism. Otherwise, an upper limit of 2000~2300 m.y., which is the " p r i m...inherited zircon component. Some peculiarities in the concordia plot of the zircon data of paragneisses and migmatites...in connection with new zircon growth. I n the concordia diagram, the data points of the individual zircon...extrapolation of the regression curves to the concordia are n o t necessarily meaningful and require verification |  | | Journal (article/letter/editorial) | | Erlangen-Nürnberg, Schlossgarten 5a, 91054 Erlangen, Germany Abstract: The (ultra)high-pressure (U)HP Makbal...the central part of the terrane. The UHP garnet–talc–chloritoid schists are believed to have formed from...subducted to depths >80 km, and then exhumed to upper crustal levels, gives crucial constraints on orogeny...major-element data, Bakirov et al. (1998) concluded that the talc–garnet– chloritoid schists are metasedimentary rocks...two eclogite samples and one sample of the garnet–talc–chloritoid schist. The overgrown rims surrounding |  | | Journal (article/letter/editorial) | | Geologie und Bergwesen Sachsen-Anhalt, 06118 Halle, Germany Karlsruher Institut für Technologie, Institut für...Petrologie Adenauerring 20b, 76131 Karlsruhe, Germany; armin.zeh@kit.edu Correspondence: Christoph.G...mineralisation is on average less than in the southeast. The upper ultramafic unit contains, more frequently, pegmatoidal...in an evolved cumulus mineral assemblage in the upper part. Academic Editor: Aberra Mogessie Received:...maps and institutional affil- The Nkomati Nickel Mine in the mafic to ultramafic Nkomati Nickel lies in |  | Garcia, Victor B., Emilia Schutesky, Maria, Oliveira, Claudinei G., Whitehouse, Martin J., Huhn, Sergio R.B., Augustin, Claudia T. (2020) The Neoarchean GT-34 Ni deposit, Carajás mineral Province, Brazil: An atypical IOCG-related Ni sulfide mineralization. Ore Geology Reviews, 127. 103773pp. doi:10.1016/j.oregeorev.2020.103773 | Journal (article/letter/editorial) | | located 12 km to the SW of the Sossego copper-gold mine in the Carajás Province, northern Brazil, represents...chalcopyrite-pentlandite are less common. Phlogopite ± talc ± actinolite alteration and late-stage veinlets...alteration zones and the mineralization. The phlogopite ± talc ± actinolite alteration occurs as irregular veins...from the scapolite-orthopyroxene and phlogopite ± talc ± actinolite alteration zones, is attributed to...geotectonic environments (Grainger et al., 2008). Several iron oxide-copper-gold (IOCG) deposits occur within this |  | | Report (issue) | | mbH in Frankfurt am Main, Federal Republic of Germany, and his colleagues who assisted, deserve special... M. Moreau, F. Tona The Pandanus Creek uranium mine, Northern Territory, Australia ......... 77 B...Geology and genesis of uranium deposits at the Pitch Mine, Saguache County, Colorado .......................the Southern Black Forest, Federal Republic of Germany ............................... H.W. 247 Bültemann...western edge of the Bohemian Massif (NE Bavaria, FR Germany) ...................................... |  | Han, Yue-Sheng, Santosh, M., Ganguly, Sohini, Li, Shan-Shan (2019) Evolution of a Mesoarchean suprasubduction zone mantle wedge in the Dharwar Craton, southern India: Evidence from petrology, geochemistry, zircon U-Pb geochronology, and Lu-Hf isotopes. Geological Journal, 54 (5) 2935-2956 doi:10.1002/gj.3440 | Journal (article/letter/editorial) | | regimes such as part of lower oceanic crust and upper mantle sections in the WDC can be subdivided into...complexes represent segments of oceanic crust or upper The Central Dharwar Craton (CDC) is bordered by...gneisses intruded by altered serpentinite. The Taluru mine was developed for the extrac- granitoid plutons...altered and metagabbros, in association with banded iron formations, fuchsite‐ serpentinised ultramafic...for this study were collected from two open‐cast mines summarized in Table 1. exposing different types |  | | Journal (article/letter/editorial) | | Belt into the area occupied by the New Consort Gold Mine and areas to the east. This paper attempts to outline...Greenstone Belt (BGB) (Pearton and Viljoen, 2017). Three mines in particular - Sheba, Fairview and New Consort...have produced the bulk of the gold with the Agnes mine in the Moodies Hills southwest of Barberton being...been mined in the Barbrook, Lily and Three Sisters mines in the areas south and east of the Stentor Pluton...situated north and northeast of the New Consort Gold Mine (GM). Early attempts at synthesizing the structural |  | Mueller, Andreas G., McNaughton, Neal J., Muhling, Janet R. (2021) Albite ± Actinolite-Altered Porphyry Dykes in Archean Gold Deposits of the Boulder Lefroy-Golden Mile Fault System, Yilgarn Craton, Western Australia: Petrography, Chronology, and Comparison to Canadian Albitites. Minerals, 11 (11) 1288 doi:10.3390/min11111288 | Journal (article/letter/editorial) | | post-kinematic actinolite-pyrite selvages overprinting talc-chlorite-phlogopite-dolomite schist. It contains...study). It was mined as the B50 ore zone on the upper benches of the open pit [6] but has not been studied...(chl-cal-bt) and talc-dolomite-phlogopite schist (modified from biotite (chl-cal-bt) and talc-dolomite-phlogopite...talc-dolomite-phlogopite (talc-dol-phl)(talc-dol-phl) schist (modified from [14]). Surface [14]). Surface samples 59070...andlink a biotite contact zone (Bt) from talc-dolomite talc-dolomite schist. chlorite-calcite Flat quartz |  | Schaltegger, Urs, Pettke, Thomas, Audétat, Andreas, Reusser, Eric, Heinrich, Christoph A. (2005) Magmatic-to-hydrothermal crystallization in the W–Sn mineralized Mole Granite (NSW, Australia) Chemical Geology, 220 (3) 215-235 doi:10.1016/j.chemgeo.2005.02.018 | Journal (article/letter/editorial) | | Bayreuth, Universitätsstrasse 30, D-95447 Bayreuth, Germany c Institute of Mineralogy and Petrology, Federal...with the cooling of a single magma chamber in the upper crust. It was the aim of the present study to date...post-orogenic. The New England Batholith consists of Upper Paleozoic to Triassic intrusive rocks ranging from...220 (2005) 215–235 219 b) N "Pheno" Breakfast Mine Paradise Lode Yankee Lode Torrington Torrington...of the mines. Zircon, monazite and xenotime were sampled at the localities of BM = Breakfast Mine; YL= |  | | Journal (article/letter/editorial) | | in the late 1950s and early 1960s by Mwinilunga Mines Limited, a subsidiary of Roan Selection Trust Technical...most drill holes. In the mid-1960s, Mwinilunga Mines determined copper resources of 20 to 30 million...industry, the pending opening of the Kansanshi copper mine (Fig. 1) and the reassessment of the Lumwana copper... kyanite schists Biotite and muscovite schists Talc - kyanite - mica - hematite schists and quartzites...Muscovite-quartzite rock and dolomite Quartz + muscovite ± talc ± hematite schist Biotitic calc-silicate rocks |  | | Book (volume) | | Illinois geology. These measures constitute the Upper Carboniferous system of repeated alterations of... W 6 mi. on Rte. 116 to the Rapatee No. 5 strip mine⎯pyritized gastropods (Pennsylvanian age). GRUNDY...banks of Mason Cr.⎯fossils; d Coal City, on area mine dumps from sedimentary overburden⎯oval concretions...States EAST BROOKLYN (SE of Gardner), area coal mine dumps⎯Marcasite, Pyrite. HANCOCK COUNTY DALLAS...COUNTY CAVE-IN ROCK: c area Fluorspar mines, and d NW 4½ mi., mines⎯Barite, Calcite, Cerussite, Chalcopyrite |  | | Book (volume) | | Illinois geology. These measures constitute the Upper Carboniferous system of repeated alterations of... W 6 mi. on Rte. 116 to the Rapatee No. 5 strip mine⎯pyritized gastropods (Pennsylvanian age). GRUNDY...banks of Mason Cr.⎯fossils; d Coal City, on area mine dumps from sedimentary overburden⎯oval concretions...States EAST BROOKLYN (SE of Gardner), area coal mine dumps⎯Marcasite, Pyrite. HANCOCK COUNTY DALLAS...COUNTY CAVE-IN ROCK: c area Fluorspar mines, and d NW 4½ mi., mines⎯Barite, Calcite, Cerussite, Chalcopyrite |  | Filina, Maria I., Sorokina, Elena S., Botcharnikov, Roman, Karampelas, Stefanos, Rassomakhin, Mikhail A., Kononkova, Natalia N., Nikolaev, Anatoly G., Berndt, Jasper, Hofmeister, Wolfgang (2019) Corundum Anorthosites-Kyshtymites from the South Urals, Russia: A Combined Mineralogical, Geochemical, and U-Pb Zircon Geochronological Study. Minerals, 9 (4) 234 doi:10.3390/min9040234 | Journal (article/letter/editorial) | | Universität Mainz, J.-J.-Becher-Weg 21, 55128 Mainz, Germany; rbotchar@uni-mainz.de (R.B.); hofmeister@uni-mainz...Universität Münster, Corrensstrasse 24, 48149 Münster, Germany; jberndt@uni-muenster.de Correspondence: makimm@mail...gem-quality variety (i.e., sapphire) colored mainly by iron and titanium is rare and commonly found in secondary...pegmatites (mines 298 and 349) [2] and sapphires in metasomatites within meta-ultramafic host rocks (mine 418)...yielded a of Concordia age ofzircon 1074.8standard ± 8.8 Ma, 91,500 [31] yielded a Concordia age of 1074 |  | Brando Soares, Mariana, Corrêa Neto, Atlas Vasconcelos, Zeh, Armin, Cabral, Alexandre Raphael, Pereira, Larissa Fernandes, Prado, Milton Guimarães Bueno do, Almeida, Antônio Modesto de, Manduca, Luedson Guimarães, Silva, Pedro Henrique Montenegro da, Mabub, Ricardo Oliveira de Araújo, Schlichta, Thiago Mazutti (2017) Geology of the Pitangui greenstone belt, Minas Gerais, Brazil: Stratigraphy, geochronology and BIF geochemistry. Precambrian Research, 291. 17-41 doi:10.1016/j.precamres.2017.01.008 | Journal (article/letter/editorial) | | Geosciences, Adenauerring 20b, 76131 Karlsruhe, Germany 4 - IAMGOLD Brasil Abstract Based on drillcore...with thinner metasedimentary intervals of banded iron formations (BIFs), turbiditic metasandstones and...intermediary rocks, minor BIFs and quartzites; and an Upper Unit composed by quartzites and polymictic metaconglomerates...Rocks of all three units are metamorphosed under upper greenschist to lower amphibolite facies conditions...(Fig. 1), is known for its giant iron ore deposits hosted in banded iron formations (BIFs) of the Cauê Formation |
|
