 | | Journal (article/letter/editorial) | | HOLGER SOMMER, ALFRED KRÖNER, SOSPETER MUHONGO AND CHRISTOPH HAUZENBERGER 247 SHRIMP zircon ages for...Palaeoproterozoic terrain of southwestern Tanzania Holger Sommer and Alfred Kröner Institut für Geowissenschaften...Universität Mainz, D-55099 Mainz, Germany Corresponding author: Holger Sommer e-mail: sommerh@mail.uni-mainz...Geowissenschaften, Universität Mainz, D-55099 Mainz, Germany Now at Institut für Mineralogie, Universität Graz...within the Mozambique belt of central Tanzania (Sommer et al., 2003; Vogt et al., submitted) as well as |  | Sommer, H., Kröner, A., Hauzenberger, C., Muhongo, S., Wingate, M. T. D. (2003) Metamorphic petrology and zircon geochronology of high-grade rocks from the central Mozambique Belt of Tanzania: crustal recycling of Archean and Palaeoproterozoic material during the Pan-African orogeny. Journal of Metamorphic Geology, 21 (9) 915-934 doi:10.1111/j.1525-1314.2003.00491.x | Journal (article/letter/editorial) | | Geowissenschaften, Universität Mainz, D-55099 Mainz, Germany (sommerh@mail.uni_mainz.de) 2 Dept. of Geology...assemblage garnet–clinopyroxene–plagioclase–quartz–biotite–amphibole ± K-feldspar ± orthopyroxene ± oxides...oxides. Metapelites are composed of garnet-biotite-plagioclase ± K-feldspar ± kyanite ⁄ sillimanite ± oxides...(Mozambique, Malawi, Madagascar, Tanzania, Kenya) and lower * Present address: Institut für Mineralogie, Universität...crustal terranes of the MB in East Africa and the lower grade, middle to upper crustal PanAfrican terranes |  | | Journal (article/letter/editorial) | | rocks from the Mozambique belt of SW Tanzania H. Sommer a,⁎, A. Kröner a, b a b Institut für Geowissenschaften...Geowissenschaften, Universität Mainz, D-55099 Mainz, Germany Beijing SHRIMP Centre, Institute of Geology, Chinese...granitoid gneisses and amphibolite-facies metapelites. Lower-grade amphibolite-facies rocks are rare and can...conditions. These are higher temperature and slightly lower pressure conditions than reported for other granulite-facies...in East Africa and Madagascar, together with the lower grade Arabian-Nubian Shield of NE Africa and Arabia |  | | Journal (article/letter/editorial) | | regional distribution of writing-sand types in SW-Germany and northern Switzerland, 14th to 19th century...Universität Berlin, Malteserstr. 74-100, 12249 Berlin, Germany *Corresponding author, e-mail: milke@zedat.fu-berlin...samples used from the 14th - 19th century in SW-Germany and northern Switzerland are analysed by petrographic...unexpected finding from this inquiry is a region in SW-Germany where artificially prepared black sands, including...came to southern Germany in the late 14th century. The first paper mill in Germany started its operations |  | | Journal (article/letter/editorial) | | petrological, geochemical and geochronological approach H. Sommer, A. Kröner, J. Lowry PII: DOI: Reference: S0024-4937(17)30184-6...2016 21 May 2017 Please cite this article as: Sommer, H., Kröner, A., Lowry, J., Neoproterozoic eclogiteto...Geowissenschaften, Universität Mainz, 55099 Mainz, Germany Present address: School of Geography, Earth Science...et al., 1998; Sommer et al., 2003, 2008; Sommer and Kröner, 2013). Together with the lower grade SC RI...Muhongo et al., 2001; PT Kröner et al., 2003; Sommer et al., 2003, 2005a,b; Collins et al., 2012; De |  | Steinhoefel, Grit, Breuer, Jörn, von Blanckenburg, Friedhelm, Horn, Ingo, Sommer, Michael (2017) The dynamics of Si cycling during weathering in two small catchments in the Black Forest (Germany) traced by Si isotopes. Chemical Geology, 466. 389-402 doi:10.1016/j.chemgeo.2017.06.026 | Journal (article/letter/editorial) | | weathering in two small catchments in the Black Forest (Germany) traced by Si isotopes Grit Steinhoefel, Jörn...Friedhelm von Blanckenburg, Ingo Horn, Michael Sommer PII: DOI: Reference: S0009-2541(17)30384-4 doi:...Friedhelm von Blanckenburg, Ingo Horn, Michael Sommer , The dynamics of Si cycling during weathering...weathering in two small catchments in the Black Forest (Germany) traced by Si isotopes, Chemical Geology (2017)...weathering in two small catchments in the Black Forest (Germany) traced by Si isotopes Grit Steinhoefel a,1, Jörn |  | SOMMER, H., WAN, Y., KRONER, A., XIE, H., JACOB, D. E. (2013) SHRIMP ZIRCON AGES AND PETROLOGY OF LOWER CRUSTAL GRANULITE XENOLITHS FROM THE LETSENG-LA-TERAE KIMBERLITE, LESOTHO: FURTHER EVIDENCE FOR A NAMAQUA-NATAL CONNECTION. South African Journal of Geology, 116 (2) 183-198 doi:10.2113/gssajg.116.2.183 | Journal (article/letter/editorial) | | H. SOMMER, Y. WAN, A. KRÖNER, H. XIE AND D.E. JACOB 183 SHRIMP ZIRCON AGES AND PETROLOGY OF LOWER CRUSTAL...FURTHER EVIDENCE FOR A NAMAQUANATAL CONNECTION H. SOMMER Corresponding author: School of Geography, Earth...Geowissenschaften, Universität Mainz, D-55099 Mainz, Germany e-mail: kroener@uni-mainz.de H. XIE Institute... The rock-forming minerals in the investigated lower crustal granulites contain garnet, clinopyroxene...Introduction The origin, age and composition of lower crustal granulites are key issues to understand |  | Jacob, J.-B., Martelat, J.-E., Goncalves, P., Giuliani, G., Devidal, J.-L., Feneyrol, J., Omito, E., Ichang'I, D. (2018) New P-T-X conditions for the formation of gem tsavorite garnet in the Voi area (southwestern Kenya) Lithos, 320. 250-264 doi:10.1016/j.lithos.2018.09.010 | Journal (article/letter/editorial) | | Pare Mountain made of high grade rocks westward (Sommer et al., 2003, 2005; Möller et al., 2000; Tenczer...together with the ultramafic bodies, within the lower-grade metasediments. We selected a set of samples...The sample VOI-34, collected in the Ilani mining district (Fig.2), is formed by an assemblage of quartz...or a fluid exsolved from it. 4.1.2. The garnet-biotite-hornblende migmatitic gneisses (TS-23B) Rare migmatitic...plagioclase (Pl), almandine-rich garnet (Grt) and biotite (Bt) with rare crystals ACCEPTED MANUSCRIPT of |  | | Journal (article/letter/editorial) | | Granite. Die Biotite der Granite mfissen also viel radioaktiver sein als die der Gneise. Biotite aus Graniten...Tar. XXII--XXV[. A. H. Cox, The Geology of the District between Abereiddy and Abercastle (Pembrokeshire)... T. JoN~s and W. J. Pvc1~, The Geology of the District around Machyalleth and the Llyfnant Valley., Das...Contiguous Deposits of the Doulting-Milborne-Port District (Somerset). Genaue Stratigraphie des Doggers yon...BOS}V~LL, The Stratigraphy and Petrology of the Lower Eocene Deposits of the North-Eastern Part of the |  | | Journal (article/letter/editorial) | | pluton's area on the present erosion surface (biotite diorites to quartz monzonites, “redwizites” according...earlier called “Gebirgsgranit”) consists mainly of biotite monzogranites (Loket, Nejdek, Fláje), whereas the...(YIC, formerly “Erzgebirgsgranit”) ranges from Li-biotite syenogranites with topaz to Fig. 1. Sketch of...hory Mts. They form the small Bergen pluton in Germany and several intrusions in the Slavkovský les area...are mostly medium- to coarse-grained biotite granodiorites to biotite monzogranites or sporadically two-mica |  | | Report (issue) | | photograph: Micaceous schist in the Wandel Park quarry near Toodyay. Contents Abstract ......................................................... 17 Germany ...................................................................... 101 Kaolinitic clay in a quarry near Muchea .....................................Geology of the area around Bootenall and Mount Sommer ....................................................... 126 Micaceous schist in the Wandel Park quarry near Toodyay ................................. |  | Loucks, Robert R., Lemish, John, Damon, Paul E. (1988) Polymetallic epithermal fissure vein mineralization, Topia, Durango, Mexico; Part I, District geology, geochronology, hydrothermal alteration, and vein mineralogy. Economic Geology, 83 (8) 1499-1527 doi:10.2113/gsecongeo.83.8.1499 | Journal (article/letter/editorial) | | Mineralization,Topia, Durango, Mexico-Part I. District Geology,Geochronology, HydrothermalAlteration...this physiographic eralization aboveore,andto district-scale regularities by King (1939), Wisser(1966)...remainpartially interredbeneathsilicicignimbrites.At lower elevationsin canyons alongthewesternflank,theMesozoic...tensely mineralized lower volcanic series. These the producingpart of the district,hornfelsic,pelitic...Ems•••'• •o•"•••tuff lower rosion Surface •i•_,• • '••lava,upp ,• •'• --•••ava, M lower EXPLANATION Rhyolite |  | | Journal (article/letter/editorial) | | Bierlein et al., 2006) and delamination of the lower crust (Czarnota et al., 2010a). These events, which...superterrane boundaries, based on regional to district-scale solid geological maps produced in this study...lithostructural traps for gold deposition in the district. Because orogenic gold deposits develop late towards...(Phillips and Powell, 2010; Table 2). The term district is correctly used to describe a metallogenic region...of Tanzania (see Figs. 2, 3 and 5). Province District Camp Deposit Size Hosting lithostructures |  | Spišiak, Ján, Vozárová, Anna, Vozár, Jozef, Ferenc, Štefan, Šimonová, Viera, Butek, Juraj (2021) Implication of Mineralogy and Isotope Data on the Origin of the Permian Basic Volcanic Rocks of the Hronicum (Slovakia, Western Carpathians) Minerals, 11 (8) 841 doi:10.3390/min11080841 | Journal (article/letter/editorial) | | from the Liptovská Teplička Village, abandoned quarry along the Šuňava-Liptovská Teplička road, 890...andesite-1st eruption phase Benkovský potok Valley, small quarry at the left side of the forest road, 832 m a.s...M-9 andesite/basalt-2nd eruption phase Kvetnica quarry, 725 m a.s.l. 49◦ 00.5210 N 20◦ 17.0850 E 2....the latter to the Oberostalpine-type). Jurassic-Lower Cretaceous sediments are preserved only locally...part of the lower by findings of some mylonitized granitoid tectonic the basal of the Ma) lower partial Hronicum |  | Charlesworth, J. Kaye, Richey, J.E., Hartley, J.J., McCallien, W.J., Reynolds, Doris L., Tomkeieff, S.I. (1935) Summer field meeting, 1935. North-East Ireland. Proceedings of the Geologists' Association, 46 (4) 493 doi:10.1016/s0016-7878(35)80016-3 | Journal (article/letter/editorial) | | northern end of the hill Seeconn eIl, where the biotite-pyroxenite and shonkinitic monzonite were examined...melanocratic va riety of augite-biotite-diorite which outcrops on the lower slopes of Slievegarron. The party...DIRECTOHS, then proceeded to Crocknafoyle and saw biotite-peridotite, which is invaded and brecciated by...the Tertiary ring-complex of the Slieve Gullion district and examined exposures of its typical rocks. In...ring-complex. East of Adavoyle railway station a quarry was visited which shows the Caledonian quartz-gabbro |  | | Journal (article/letter/editorial) | | the alteration of mafic minerals, particularly biotite, * E-mail: e.marwa@abdn.ac.uk DOI: 10.1180/claymin...vermiculite were mined from Mikese in Morogoro Rural District and processed in Dar-esSalaam where an experimental...quality is to be found at Kwekivu area in Kilindi District but it is not mined due to the high costs associated...Ethiopia, through Kenya and Tanzania, to Mozambique (Sommer et al., 2003). Holmes (1951) was the first to recognize...it is a ~1000 km long discontinuous linear belt (Sommer et al., 2005) stretching in a N S direction from |  | | Journal (article/letter/editorial) | | Universität Bonn, Poppelsdorfer Schloß, 53115 Bonn, Germany Received 4 August 2006; received in revised form...4.1.1. I04-01 This sample is of biotite gneiss from Malyanakil Quarry, at Manali (N08◦ 30’28” E77◦ 02’57”)... I03-18 I03-18 is a garnet + biotite gneiss sample from a sunken quarry directly south of the Ovari to...129 4.1.3. I04-04 This sample is of a garnet + biotite + sillimanite + cordierite metapelite and was collected...have been reset. 4.1.4. K1-2 K1-2 is a garnet-biotite gneiss from Mannanthala, very close to Trivandrum |  | | Journal (article/letter/editorial) | | of the Continental Deep Drilling Project (KTB/Germany) Received: 20 July 1996 / Accepted: 22 November...Potsdam, Telegrafenberg A50, D-14473 Potsdam, Germany Fax: #0331 288 1436 E-mail: pemoe@gfz-potsdam.de...incorporated into secondary minerals of either lower or higher solubility. The leaching results on KTB...intercalations of metagabbros, hornblende gneisses, and biotite gneisses. The boundaries between the lithologic...in mineralogic composition: oligoclase, quartz, biotite, Ferich garnet, sillimanite/kyanite, muscovite |  | Ferreira, Valderez P., Sial, Alcides N., Pimentel, Marcio M., Armstrong, Richard, Guimarães, Ignez P., da Silva Filho, Adejardo F., de Lima, Mariucha Maria C., da Silva, Thyego R. (2015) Reworked old crust-derived shoshonitic magma: The Guarany pluton, Northeastern Brazil. Lithos, 232. 150-161 doi:10.1016/j.lithos.2015.06.030 | Journal (article/letter/editorial) | | epidote-bearing hornblende CE P monzodiorite to biotite granite that intruded Paleoproterozoic orthogneisses...1/Sr concentrations, suggest hybridization of a lower continental crustal melt with more felsic crustal... ACCEPTED MANUSCRIPT of old (tDM = 2.0 Ga) amphibolitic lower continental crustal rocks, in a post-collisional...1996; Turner et al.,1996; Blatter et al., 2001; Sommer et al., 2006; Shiran, 2013). The shoshonitic series...with crustal magma in the lower crust (e.g. Väisänen et al., 2000; Sommer et al., 2006; Aldanmaz et al |  | | Journal (article/letter/editorial) | | that were determined. The Stenian orthogneisses (biotite granitic gneiss dates at 1056 ± 19 Ma and the associated...Supracrustal rocks (marble and calc-silicate, garnet-biotite (hornblende) gneisses, quartzo-feldspathic gneisses...metamorphic age at 589 ± 5 Ma obtained from a biotite garnet gneiss rock sample (amphibolite facies)...SE Tanzania was followed by the emplacement of biotite alkali granite at 554 ± 3.9 Ma, which probably...between ≈1150 and 1000 ± 9 Ma (Kröner et al., 2003; Sommer and Kröner, 2013; Fig. 1. Paleogeographic construction |  | Hauzenberger, C.A., Tenczer, V., Bauernhofer, A., Fritz, H., Klötzli, U., Košler, J., Wallbrecher, E., Muhongo, S. (2014) Termination of the Southern Irumide Belt in Tanzania: Zircon U/Pb geochronology. Precambrian Research, 255. 144-162 doi:10.1016/j.precamres.2014.09.021 | Journal (article/letter/editorial) | | (Appel et al., 1998; Moeller et al., 1998, 2000; Sommer et al., 2003; Johnson et al., 2003; Reddy et al...Tenczer et al., 2006, 2007; Cutten et al., 2006; Sommer et al., 2008) as well as the southeastern part...granodioritic gneiss, migmatic biotite-hornblende-gneiss, muscovite-biotite ± kyanite gneiss/micaschist;...In contrast, these samples were interpreted by Sommer and Kroener (2013) as ultra high temperature granulites...Pinkish well foliated biotite-gneiss Migmatic amphibole-biotite-gneiss Migmatic biotite-gneiss Migmatic a |  | | Journal (article/letter/editorial) | | the Ngualla volcanic and granitic rocks are much lower than the corresponding mantle value of +6.13 at...facies metamorphic rocks whereas the lower greenschist to lower amphibolites facies metamorphic rocks...including granulites, migmatites, amphibolites, biotite gneisses, schists, quartzites, eclogites and marble...marble. The dominant lithologies are biotite gneisses with minor mafic and ultramafic intrusions, late granites...(Fig. 3b). The fine-grained variety consists of biotite, hornblende, plagioclase, pyroxene and magnetite |  | Nasdala, Lutz, Wenzel, Marita, Andrut, Michael, Wirth, Richard, Blaum, Peter (2001) The nature of radiohaloes in biotite: Experimental studies and modeling. American Mineralogist, 86 (4) 498-512 doi:10.2138/am-2001-0414 | Journal (article/letter/editorial) | | pages 498–512, 2001 The nature of radiohaloes in biotite: Experimental studies and modeling Lut z Nasdal...JOHANNES GUTENBERG-UNIVERSITY, D-55099 MAINZ, GERMANY 2 INSTITUTE OF SOLID STATE PHYSICS, UNIVERSITY...UNIVERSITY OF TECHNOLOGY, D-64289 DARMSTADT, GERMANY 3 INSTITUTE OF MINERALOGY AND CRYSTALLOGRAPHY, GEOCENTER,...GEOFORSCHUNGSZENTRUM POTSDAM , D-14473 POTSDAM , GERMANY ABSTRACT Several micro-techniques (confocal laser-Raman...radiohaloes in biotites from two Variscan rocks from Germany. The studied biotites are intermediate members |  | Tenczer, V., Hauzenberger, Ch., Fritz, H., Hoinkes, G., Muhongo, S., Klötzli, U. (2013) Crustal age domains and metamorphic reworking of the deep crust in Northern-Central Tanzania: a U/Pb zircon and monazite age study. Mineralogy and Petrology, 107 (5) 679-707 doi:10.1007/s00710-012-0210-1 | Journal (article/letter/editorial) | | attracted some interest by research teams with focus on lower crustal processes and reworking of Archean crust...boundaries are blurred or indistinguishable in the lower crust and a geochronological study is the basis...associated large scale shear zones have been recognised (Sommer et al. 2003; Fritz et al. 2005; Cutten et al. 2006;...1995; Collins et al. V. Tenczer et al. 2004; Sommer et al. 2005) was attached by westward thrusting...metamorphic overprint, however, is disputed (ca. 640 Ma: Sommer et al. 2003; 530–580 Ma: Cutten et al. 2006). 3) |  | Thomas, Robert J., Roberts, Nick M.W., Jacobs, Joachim, Bushi, Alphonce M., Horstwood, Matthew S.A., Mruma, Abdul (2013) Structural and geochronological constraints on the evolution of the eastern margin of the Tanzania Craton in the Mpwapwa area, central Tanzania. Precambrian Research, 224. 671-689 doi:10.1016/j.precamres.2012.11.010 | Journal (article/letter/editorial) | | Mpwapwa Group was intruded by weakly foliated biotite granite at 1873 ± 31 Ma. Zircons in the granite...reworked eastern part of the Tanzania Craton (e.g. Sommer et al., 2005); (b) the reworked part of the craton...Orogen to the south (e.g. Cutten et al., 2006; Sommer et al., 2008; Fritz et al., 2009), while others...surprising in view of the locality, well within the EAO. Sommer et al. (2005) showed that the western domain consists...grade metamorphism in the Western Granulite domain. Sommer et al. (2005) reported metamorphic rims at ca. |
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