 | | Journal (article/letter/editorial) | | isotopes: A case study from the Schwarzwald, SW Germany Johannes Glodny & Borwin Grauert* Received: 28...quarry near Steinach (Kinzigtal, Schwarzwald, SW Germany). Veins are postorogenic, SW-NE-oriented, and cut...low-temperature fluids (∼100–200°C) caused adularia-quartz-sericite-type alteration. Fluid-rock interaction occurred...Münster, Germany J. Glodny (*) Deutsches GeoForschungsZentrum, Telegrafenberg, 14473 Potsdam, Germany e-mail:...absolute age constraints. The Schwarzwald, SW Germany, is an area well-known for its abundance of hydrothermal |  | | Book | | Boring — German (West) — Oberpfalz Region. 2. Earth — pfalz Region. I. Emmermann, R. (Rolf), 1940— . Il...the deep continental crust) Crust. 3. Geology - Germany (West) — OberWohlenberg, Jiirgen, 1933- . III....Springer-Verlag Berlin Heidelberg 1989 Printed in Germany The use of registered names, trademarks, etc....Deep Drilling Program of the Federal Republic of Germany (KTB) would be drilled in the Oberpfalz area...the most ambitious project in the geosciences in Germany. From the beginning, the "Senatskommission fiir |  | | Journal (article/letter/editorial) | | depositional U-Pb age of the Miillenbach uranium ore (Baden-Wiirttemberg, F.R.G.) PHILIPPE ‘Commissariat &...Mtillenbach uranium deposit (Baden-Wiirttemberg, Federal Republic of Germany) result in calculated Pb-Pb...uranium deposit based on K-Ar isotopic data on sericite. They interpret this age as the age of pitchblende... or 222Rn, can be lost from the system (Ludwig, 1978; Ludwig et al., 1981, 1984; Lancelot et al., 1984;...The mineralized zone is located south of the Baden-Baden area and is hosted principally by organic-rich |  | | Journal (article/letter/editorial) | | study in the northern Schwarzwald (Variscan Belt, Germany) Received: 17 July 1998 / Accepted: 19 January... Im Neuenheimer Feld 236, D-69120 Heidelberg, Germany Fax: c49 6221 544805 e-mail: mhanel6classic.min...Geologisches Institut, Albertstrasse 23b, D-79104 Freiburg, Germany Introduction Metasedimentary amphibolite-facies...after Franke 1989). LLZ Lalaye-Lubine Zone; BBZ Baden-Baden Zone; OGC Omerskopf Gneiss Complex; CSGC Central...northernmost part of the Schwarzwald around the Baden-Baden area is assigned to the Saxothuringian Zone (Fig |  | | Journal (article/letter/editorial) | | isotope studies on migmatites from the Schwarzwald (Germany): constraints on isotopic resetting during Variscan...Heidelberg, Germany 'Zentrallabor fur Geochronologie, Corrensstr. 24, 0-48149 Munster, Germany ABSTRACT...Bohemian Massif Massif Central L./ { ALPS .A: Baden B a d e n f i GEOLOGICAL SETTING A N D PREVIOUS...GEOCHRONOLOGICAL WORK The Schwarzwald in south-western Germany forms part of the internal zone of the Variscan...Rb-Sr thin slab dating. Abbreviations: BBZ, Baden-Baden-Zone; BLZ, BadenweilerLenzkirch-Zone; CSGC, Central |  | | 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) ............................................. |  | | Journal (article/letter/editorial) | | coffinitc+ carbonates+ adularia+ Fe sulfides.The F• mine,in Salamanca province,is not onlythe largest knowndepositof...la Yegua,andthe Saelices group (including theF• mine),2 = VillaviejadeYeltes,3 = CeclavlnandAcehuche...annualproductionof 200 metric tons of UaOs. Current F(• mine reserves are in excessof 16,000 metrictonsofUsOs(Arnaizet...Mart•n-Izard, 1989) have shownthat in the Ciudad Rodrigo region the quartzites,conglomerates, schists, and calc-silicate...calc-silicate rocks have uranium Mineralization Fd mine The F• depositwas originally mined in the oxicontentsof |  | | Journal (article/letter/editorial) | | Moldanubian and Saxothuringian (Northern Black Forest, Germany) Received: 20 October 1992/ Accepted: 9 November...Forest), over a distance of about 45 km between Baden-Baden and Pforzheim, basal series of the sedimentary...Universit~it, Postfach 33 0440, D-28334 Bremen, Germany N. Clauer Centre de S~dimentologieet G6ochimiede...The fault extends from Neuweier (south-west of Baden-Baden) via Gernsbach, Herrenalb and H6fen to an area...occurs in Corgrich Carboniferous sediments of the Baden Trough at Mfillenbach (Zuther and Brockamp, 1988) |  | | Journal (article/letter/editorial) | | Economic Geology, Adenauerring 20b, 76131 Karlsruhe, Germany Orebusters Pty Ltd, Gwelup 6018, Western Australia...border region offers new Journal Pre-proof insights into the tectonic evolution of the region. A better...are in the Northern Domain, comprising the border region between the of Thrym Complex and Ketilidian Orogen...Garde et al. (2002b) -p cluster at ca. 1800 Ma (Baden et al., in press), which approximates the age of...saussuritised and K-feldspar is partly altered to sericite. Quartz has undulose extinction, subgrain recrystallisation |  | Yu, Mingjie, Wang, Yuwang, Wang, Jingbin, Mao, Qigui, Deng, Xiaohua, Sun, Yan, Zhang, Rui (2019) The mineralization of the Kalatage arc, Eastern Tianshan, NW China: Insights from the geochronology of the Meiling Cu-Zn(-Au) deposit. Ore Geology Reviews, 107. 72-86 doi:10.1016/j.oregeorev.2018.12.009 | Journal (article/letter/editorial) | | quartz, sericite, and/or minor calcite/gypsum/barite. Here, we report new zircon U-Pb, sericite ArAr and...yields a weighted mean age of 298.7±2.9 Ma; the sericite from the phyllic alteration zone of the M2 orebody...Phanerozoic supercollage and metallogenic domain. This region is the remnant of the Paleo-Asian Ocean after its...Ni and Mo deposits have been discovered in this region, including the Kalatage Cu-Zn-Au deposits (Mao...metallogenic background of the Eastern Tianshan region and arc-basin system transformations. In recent |  | | Journal (article/letter/editorial) | | D-76128 Karlsruhe, Germany 2 Mineralogisch-Petrographisches Institut, Universit~it Freiburg, Albertstrasse...Albertstrasse 23b, D-79104 Freiburg, Germany Institut ffir Mineralogie, Universit/it Mfinster, Corrensstrasse 24...24, D-48149 Mfinster, Germany Received May 5, 1993 / Accepted July 25, 1993 Abstract. The Moldanubian... Im Neuenheimer Feld 236, D-69120 Heidelberg, Germany be inferred (Franke 1989). As high-pressure rocks...Geological setting The Schwarzwald in southwestern Germany covers part of the Moldanubian and Saxothuringian |  | | Journal (article/letter/editorial) | | Geowissenschaften, Wilhelmstraße 56, 72074 Tübingen, Germany e-mail: wolfgang.siebel@uni-tuebingen.de J. Rohrmüller...Bayerisches Landesamt für Umwelt, 95615 Marktredwitz, Germany II granitoids but likely represents the north-eastward...were calculated using PbDAT and ISOPLOT programs (Ludwig 2003). Single-zircon Pb-evaporation (Kober 1986...schlieren or in more felsic varieties. Epidote, sericite, chlorite, calcite and hematite/ goethite were...Langer C (1999) Plutonism in the Variscan Odenwald (Germany): from subduction to collision. Int J Earth Sci |  | | Journal (article/letter/editorial) | | ®eld work in the Kwekwe district near the Indarama mine, approximately 200 km southwest of Harare, Zimbabwe...of the dike shows a typical K-feldspar-albite-sericite-pyrite (biotite?) alteration, followed by a narrow...Freiberg, Brennhausgasse 14, D-09596 Freiberg, Germany G. Friedrich Institut fuÈr Mineralogie und LagerstaÈttenlehre...Hochschule Aachen, WuÈllnerstr. 2, D-52056 Aachen, Germany R. Frei Mineralogisch-Petrographisches Institut...in the transition between the K-feldsparalbite-sericite-pyrite alteration and the propylitic zone, indicating |  | | Journal (article/letter/editorial) | | Center (DLR), P.O. Box 1116, D-82234, Wessling, Germany e-mail: andreas.hirner@dlr.de R.A. Armstrong Research...sedimentary rocks, now represented by phyllites, quartz-sericite schists, quartz-chlorite schists, amphibolites...intercalated with thick units of phyllites and quartz-sericite schists. Quartzchlorite schists, amphibolites...part of the belt (Hirner, 2000). The Madibe gold mine is situated on the eastern succession, close to...25°32’10”E) and belongs to a sequence of quartz-sericite schist from the hanging wall of the ore body. |  | | Journal (article/letter/editorial) | | dating of uraninite-bearing whole-rock samples (Ludwig et al., 1987). The next oldest reported age is...U deposits, uraninite and white-mica (illite, sericite), may be reset by Pb and Ar losses, respectively...unconformity-related U deposit, within hydrothermal chlorite-sericite alteration at the Ranger No. 3 unconformity-related...al., 2005). Hydrothermal white-mica (illite and sericite) alteration generally occurs in outer alteration...whole-rock ore samples from the Ranger 1 deposit (Ludwig et al., 1987). The Sm–Nd isotope data of Maas (1989) |  | Ludwig, K. R., Grauch, R. I., Nutt, C. J., Nash, J. T., Frishman, David, Simmons, K. R. (1987) Age of uranium mineralization at the Jabiluka and Ranger deposits, Northern Territory, Australia; new U-Pb isotope evidence. Economic Geology, 82 (4) 857-874 doi:10.2113/gsecongeo.82.4.857 | Journal (article/letter/editorial) | | Territory, Australia:New U-Pb IsotopeEvidence K. R. LUDWIG,R. I. GRAUCH,C. J. NuTr, J. T. NASH,DAVID FRISHMAN...and 2), is a giant districtby any standards.This region contains at least 20 percent of the world's low-costuranium...studybenefitedfrom an unusuallywell-documentedchronologyfor this region(Pageet al., 1980). Theseinvaluabledataprovide the...ultimate 0361-0128/87/680/857-18$2.50 857 858 LUDWIG ET AL. /Figure 2 location lerite and the lower...Betweenthis time and about 1,800 m.y., the Formation. region underwenta period of deformationand amGeologyand |  | | Journal (article/letter/editorial) | | slightly older than published 40Ar/39Ar ages for sericite associated with mineralization in these deposits...Mongolia (Fig. 1) and has been exploited by the Erdenet mine since 1977; it has production plus reserves of 9...Cox (1998) recently reported 40Ar/39Ar dates for sericite samples from hydrothermal alteration zones in...1998). FIG. 2. a. Geologic map of the Erdenet region (Naito and Sudo, 1999). b. Plan and section map...mineralization appears to be associated with subsequent sericite alteration. Major ore minerals, such as chalcopyrite |  | Tsang, Debbie P.W., Wallis, Simon R., Yamamoto, Koshi, Takeuchi, Makoto, Hidaka, Hiroshi, Horie, Kenji, Tattitch, Brian C. (2018) Zircon U–Pb geochronology and geochemistry of the Cerro Colorado porphyry copper deposit, northern Chile. Ore Geology Reviews, 93. 114-140 doi:10.1016/j.oregeorev.2017.12.019 | Journal (article/letter/editorial) | | extracted from Cerro Colorado, an 73 active PCD mine site that lies at the northern end of the Paleocene–early...cores supplied by the mine site sample all the main rock types of this 76 region. We carried out zircon...Colorado Area 82 The BHP Billiton Cerro Colorado Mine is located about 120 km to 83 the northeast of...understanding the geological setting of the Cerro Colorado mine was 86 established by Bouzari & Clark (2002, 2006)...surface geology and a series of cores through the mine site, and the 88 following summary is mainly based |  | Cabral, Alexandre Raphael, Wiedenbeck, Michael, Koglin, Nikola, Lehmann, Bernd, de Abreu, Francisco R. (2012) Boron-isotopic constraints on the petrogenesis of hematitic phyllite in the southern Serra do Espinhaço, Minas Gerais, Brazil. Lithos, 140. 224-233 doi:10.1016/j.lithos.2012.01.011 | Journal (article/letter/editorial) | | Adolph-Roemer-Str. 2A, 38678 Clausthal-Zellerfeld, Germany Helmholtz-Zentrum Potsdam, Deutsches GeoForschungsZentrum...GeoForschungsZentrum, Telegrafenberg C128, D-14473 Potsdam, Germany Geodynamik und Geomaterialforschung, Julius-Ma...ersität Würzburg, Am Hubland, 97074 Würzburg, Germany d Votorantim Metais, Praça Ramos de Azevedo 206...characterised by abundant fine-grained muscovite, i.e. sericite, and variable amounts of titaniferous hematite...compositions, leading to tourmalinebearing, hematite–sericite assemblages of the hematitic phyllite. © 2012 |  | Wu, Ya-Fei, Li, Jian-Wei, Evans, Katy, Vasconcelos, Paulo M., Thiede, David S., Fougerouse, Denis, Rempel, Kirsten (2019) Late Jurassic to Early Cretaceous age of the Daqiao gold deposit, West Qinling Orogen, China: implications for regional metallogeny. Mineralium Deposita, 54 (4) 631-644 doi:10.1007/s00126-018-0835-z | Journal (article/letter/editorial) | | Accepted: 6 August 2018 # Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract The West...mineralization is constrained by two types of sericite: sericite aggregates coexisting with disseminated auriferous...and sericite coexisting with auriferous pyrite in weakly mineralized granodiorite dykes. Sericite aggregates...discounted ages from several other gold deposits in the region and suggest that there is an underappreciated gold... and Jianchaling; Fig. 1), recent ore-related sericite and fuchsite 40 Ar/39Ar, carbonate Sm–Nd, and |  | Mercer, Cameron M., Cosca, Michael A., Hofstra, Albert H., Premo, Wayne R., Rye, Robert O., Landis, Gary P. (2022) 40Ar/39Ar Geochronology of Magmatic-Steam Alunite from Alunite Ridge and Deer Trail Mountain, Marysvale Volcanic Field, Utah: Timing and Duration of Miocene Hydrothermal Activity Associated with Concealed Intrusions. Minerals, 12 (12) 1533 doi:10.3390/min12121533 | Journal (article/letter/editorial) | | data for samples of magmatic-steam alunite and sericite from six mines and prospects provide evidence...with thethe location of the volcanic field (yellow region with dotted Figure MapofofUtah Utah with location...ofMarysvale the Marysvale volcanic field (yellow region with dotted border) highlighted border) highlightedrelative...physiographicprovinces provincesininthe theregion region(approximate (approximate boundboundaries shown...byindicated the dashed lines andregion the approximate region where regionand where 21–14Belknap Ma volcanic |  | Mao, J., Konopelko, D., Seltmann, R., Lehmann, B., Chen, W., Wang, Y., Eklund, O., Usubaliev, T. (2004) Postcollisional Age of the Kumtor Gold Deposit and Timing of Hercynian Events in the Tien Shan, Kyrgyzstan. Economic Geology, 99 (8) 1771-1780 doi:10.2113/gsecongeo.99.8.1771 | Journal (article/letter/editorial) | | Adolph-Roemer-Str. 2a, 38678 Clausthal-Zellerfeld, Germany WEN CHEN, Institute of Geology, Chinese Academy...report here Ar/ Ar whole-rock and sericite data for host-rock (sericite-quartz altered rock) and gold ore...altered rock and sericite-bearing gold ore are 285.5 ± 1.2 and 288.4 ± 0.6 Ma. Sericite concentrates gave...temporal relationship to Hercynian events in the region are rather poorly constrained. Most of the deposits...Hercynian postcollisional granitoid intrusion of the region, about 80 km southeast of Kumtor. Geochronological |  | | Journal (article/letter/editorial) | | mineralisation at the Sandpiper Deposit, Tanami region, northern Australia a b G. L. Fraser , L. Bagas...mineralisation at the Sandpiper Deposit, Tanami region, northern Australia, Australian Journal of Earth...mineralisation at the Sandpiper Deposit, Tanami region, northern Australia G. L. FRASER1*, L. BAGAS2...Sandpiper gold deposit in the Tanami region of northern Australia sericite is intimately intergrown with arsenopyrite...suggesting sericite crystallisation synchronous with gold-bearing fluid flow. This ore-stage sericite yields |  | | Journal (article/letter/editorial) | | Leibniz University, Welfengarten 1 D-30167 Hannover, Germany Abstract The Central European Variscides and their...Belgium, in the West, through the Ruhr District, Germany, to the Upper Silesian Coal Basin, Poland. The...Nevertheless as being a common phyllosilicate also in the region under consideration it deserves a closer look at...metapelites as underpinned by geochemical surveys in SE Germany (Dill 2015a). It is no surprise to find a varied...these phyllosilicate-bearing raw materials in Germany the reader is referred to the map of Fig. 5 presenting |  | Lehmann, Bernd, Zhao, Xinfu, Zhou, Meifu, Du, Andao, Mao, Jingwen, Zeng, Pusheng, Henjes-Kunst, Friedhelm, Heppe, Klaus (2013) Mid-Silurian back-arc spreading at the northeastern margin of Gondwana: The Dapingzhang dacite-hosted massive sulfide deposit, Lancangjiang zone, southwestern Yunnan, China. Gondwana Research, 24 (2) 648-663 doi:10.1016/j.gr.2012.12.018 | Journal (article/letter/editorial) | | University of Clausthal, 38678 Clausthal-Zellerfeld, Germany State Key Laboratory of Ore Deposit Geochemistry...Geowissenschaften und Rohstoffe, 30655 Hannover, Germany f Teck Exploraciones Mineras Chile Ltda., Santiago...Pervasive hydrothermal alteration is dominantly quartz–sericite. Maximum enrichment in gold, bismuth, selenium...University of Clausthal, 38678 Clausthal-Zellerfeld, Germany. Tel.: +49 5323 722776. E-mail address: bernd....zircon is from about 1000 m east of the Yinzishan mine along the Simao–Lincang highway. Data from Heppe |
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