 | | Journal (article/letter/editorial) | | 45056 rakovajf@miamioh.edu Fluorapatite Acushnet Quarry Bristol County, Massachusetts N orth America...anywhere is the “Roebling apatite” from the Pulsifer quarry in Auburn, Maine. Formerly in the collection of...worldwide, the Acushnet quarry (also currently known as the J. Keating Company stone quarry), Bristol County... The metamorphic rocks exposed in the Acushnet quarry are a mixture of schists, gneisses, and intruded...variety of orthoclase, the pericline variety of albite, calcite, epidote, muscovite, quartz, titanite |  | | 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 |  | | Journal (article/letter/editorial) | | and high nutrient concentrations (Reynolds, 1984; Sommer et al., 1986; Willén, 1991). Aggregation and sedimentation...is regenerated very rapidly in the epilimnion (Sommer, 1984), most of the labile Si in the ecosystem...especially the summer diatom species succession (Sommer et al., 1986; Van Donk and Kilham, 1990; Egge and...permanent burial of diatoms is usually not important (Sommer, 1988), and most Si contained in the settling diatom...the geological units, where Cretaceous, Tertiary (Lower and Upper), 111 Plio-Pleistocene and Pleistocene |  | | 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) | | Ruhr-University Bochum, Germany 2 Department of Mineralogy, TU Bergacademy Freiberg, Germany Received March 6...Fig. 1. Results of point counting of samples of a Lower Cretaceous quartz sand from Ottenstein (north-western...irradiation. In the Lower Cretaceous sands of the Kuhfeld-Formation in W Germany, digital images of initial...(b) CL-colours of quartz grains in a sample of Lower Cretaceous quartz sands from W€ulfrath=NRW (grain...kaolinite-cement (K) in a Rotliegend-sandstone of NW Germany; f CL-images of the four types of zircons recognized |  | | Journal (article/letter/editorial) | | Eberhard-Karls-UniversitaÈt, Wilhelmstrasse 56, 72074 TuÈbingen, Germany E-mail: markl@uni-tuebingen.de Editorial responsibility:...plate-like clinopyroxene are enclosed in a mixture of albite, microcline, a second generation of needle-shaped...K-feldspar + Na+aq. In sample GM 1653, small amounts of albite intergrown with anhedral K-feldspar are also present...matrixconsists of the same minerals but analcime and albite are either absent or present in only minute amounts...analcime and albite together with steenstrupine. This texture is the only one where albite is preserved |  | | Journal (article/letter/editorial) | | hydrothermal fluids. Namely plagioclase should give rise to albite, and topaz was also formed during the hydrothermal...parentheses. K. Breiter / Lithos 151 (2012) 105–121 albite–zinnwaldite–topaz alkali feldspar leucogranites...hory Mts. They form the small Bergen pluton in Germany and several intrusions in the Slavkovský les area...Skála in Bohemia, Krinitzberg and Waldfischkopf in Germany, Fig. 2a), which occur near the pluton contact...fractionated syenogranites with biotite, oligoclase and lower content of topaz in the southwest part of the pluton |  | 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 |  | | Journal (article/letter/editorial) | | *~ Calcite Quartz Kaolinite Illite K-feldspar Albite 0.38 74.07 2.98 1.08 5.06 0.50 0.38 76.00 2.98...and 3/14a-8, which are lateral equivalent of the lower part of the Heather Formation, all the formations...progression from coastal shallow-marine sands (Lower Brent Group), to alluvial or deltaic sands, shales...(calcite, quartz, kaolinite, illite, K- feldspar and albite) at 80 °C is also given in Table 3. 4. Geochemical...I)issolution _9 ,717 A~>f~z~J~v.~ -3 7 • end 3 of albite : 6 dizsog~tZo~ • 9 NIIIIIB(?F o f s u c c e |  | | Journal (article/letter/editorial) | | MARKL∗, MICHAEL MARKS, GREGOR SCHWINN AND HOLGER SOMMER INSTITUT FÜR MINERALOGIE, PETROLOGIE UND GEOCHEMIE...SITÄT, WILHELMSTRASSE 56, D-72074 TÜBINGEN, GERMANY RECEIVED JUNE 26, 2000; REVISED TYPESCRIPT ACCEPTED...kakortokite as the only exception from this rule shows a lower Fe/Mg ratio, but on the other hand a more evolved...Eudialyte as a liquidus phase indicates that the lower Fe/Mg ratio is possibly related to contamination...subsolidus assemblages consisting of analcime, sodalite, albite, muscovite and hydrogrossular (Fig. 2c and d). |  | 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) | | of augite-biotite-diorite which outcrops on the lower slopes of Slievegarron. The party PROC. GEOL. Assoc...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...was noted in the view. After lunch at Glendooey quarry the coaches proceeded around the hills that mark...examined a t road -side exposures, and in Lislea quarry a sparsely porphyritic granophy re of the north-west |  | | Journal (issue) | | 1892 Sehr geehrter Herr Pschesima ich habe disen Sommer solche schöne Mineralien gefunden. Schöne Rotile...Amazonitplatten zeigen schneeweiße, ballförmige Albite bis zu 4 cm im Durchmesser, zwei Stufen tragen...verbreitet. Das beschriebene Vorkommen liegt SE von Aschaffenburg im nordwestlichen Bayern, am Ortsrand von Dörrmorsbach...Dörrmorsbach, welches heute ein Teil der Gemeinde Haibach ist. Der nach heutigen Verhältnissen sehr kleine...Dörrmorsbach (GK 6020 Haibach R 351701 H 553451 ). Vom Ortsausgang Richtung Gailbach/ Haibach folgt man links |  | Sommer, Frank, Maschowski, Christoph, Dietze, Volker, Grobéty, Bernard, Gieré, Reto (2016) Comparing single-particle analysis data of volcanic ash of the 2010 Eyjafjallajökull eruption obtained from scanning electron and light microscope images. European Journal of Mineralogy, 28 (5) 855-868 doi:10.1127/ejm/2016/0028-2555 | Journal (article/letter/editorial) | | Universität Freiburg, Geowissenschaften, 79104 Freiburg, Germany *Corresponding author, e-mail: franksommer@t-online...Medizin-Meteorologische Forschung, 79104 Freiburg, Germany 3 Université de Fribourg, Département des Géosciences..._gsw.pdf by Uppsala Universetet user 856 F. Sommer et al. that was deposited during the eruption..._gsw.pdf by Uppsala Universetet user 858 F. Sommer et al. Fig. 2. Images of the same field of view...in the pattern of the re-suspended ash sample is lower than those of the ground sample, thus producing |  | 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) | | Calorimetric study of the entropy relations in the low albite–low microcline series Artur Benisek1,*, Edgar Dachs1...Münster, Germany 2 Abstract New heat capacity data obtained on 12 samples of the low albite–low microcline...series, low albite from Amelia Courthouse, Virginia, was used as parent material. The Amelia albite is a pegmatitic...Robie (1971) and Sinkankas (1968). From the Amelia albite, low microcline was prepared by ionexchange in...use the terminology “K-derivative of the Amelia albite.” Mixtures of the end-members were then homogenized |  | 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) | | 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...Guarany pluton was 2. AC formed from old, recycled lower crustal source rock. Geological setting A Paleoproterozoic |  | 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 |  | | Journal (article/letter/editorial) | | Geological Society 51/12(2006) 3 The Krásno Sn-W ore district near Horní Slavkov: mining history, geological...79, Czech Republic The tin-tungsten Krásno ore district near Horní Slavkov (Slavkovský les area, western...reviews the data on geological setting of the ore district, individual ore deposits and mining history. Horní...mineralogy; Slavkovský les; Krásno, Horní Slavkov ore district; Czech Republic. Introduction In the mining history...the Horní Slavkov Krásno mining district (Fig. 1). The Krásno district is located near Horní Slavkov in |  | | Journal (article/letter/editorial) | | Bochum, Germany Rasterelektronenmikroskop, Ruhr-Universität Bochum, D-44780 Bochum, Germany 3Institute...luminescent cracks are composed of retrogressively formed albite; the core contains a phengite inclusion lacking...Na-distribution; note here the bluish veins and rim of albite. j) CL-image of jadeite (yellowish-green) and kyanite...quartz and garnet with minor amouts of glaucophane, albite, paragonite, talc, phengite, omphacite and coesite...g. Sr2+ are also able to suppress CL-intensity (Sommer, 1972). The dull luminescing garnet core (Fig. |  | | Report (chapter) | | MARSH DEPOSITS UPPER FORESHORE STACKED CHANNELS LOWER FORESHORE SHOREFACE UPPER OFFSHORE BROOM tu 5g...requires more data. Comparing average K-feldspar and albite concentrations between cores from variable depths...detection limit of XRD below about 3 . 5 4 km. The albite concentration shows no distinct trend versus depth...area. In some of the wells from block 30/6, the albite concentration is very low, particularly in samples...more quartzitic with very low conc~htrations of albite and K-feldspar. According to Harris (1989), the |  | Flores, J. A., Nardi, L. V. S., Formoso, M. L.L., Meunier, A., Pascal, M. L., Fonteilles, M., Ferreira, A. C. (2006) Granitic Rocks of the Rio dos Bugres Mine: Host Rocks of Fluorite Deposits in Southernmost Brazil. International Geology Review, 48 (1) 63-77 doi:10.2747/0020-6814.48.1.63 | Journal (article/letter/editorial) | | OIB mantle sources (Bitencourt and Nardi, 2000; Sommer et al., 2005). Leucogranites, biotite granites...of apogranites and albitites with secondary albite and lower proportions of muscovite, at temperatures...Albitization was followed by propylitization at lower temperatures. According to apatite fission track...include chlorite, corrensite, actinolite, epidote, albite, white mica, carbonates, and alkali feldspar. The...the syenogranites it has a composition close to albite. Alkali feldspar is compositionally very close |  | | Journal (article/letter/editorial) | | Am Roten Berg, Schneeberg–Neustädtel, Saxony, Germany. Occurrence: Found in the oxidation zone of the...nickellotharmeyerite, two new minerals from Schneeberg, Germany: description and crystal structure. Neues Jahrbuch...R.A., GUNTER, M.E., CAMPANA, C.F., RAKOVAN, J., SOMMER, A. & BRUESEKE, M.E. (2001): Dickthomssenite, Mg(V2O6)•7H2O...also from the Pucher Shaft, Schneeberg, Saxony, Germany. Occurrence: Associated minerals are: beudantite...Na4Zr2Si10O26•9H2O M ONOCLINIC Locality: Poudrette Quarry, Mont Saint-Hilaire, Rouville County, Quebec, Canada |  | | Journal (article/letter/editorial) | | the Ladick quarry has produced some phenakite associated with cassiterite. The Ladick quarry is operated...obscured and in part obliterated the zoning. A thin lower wall zone (10–15 cm) consists of moderately coarse...of the core zone are absent, removed either by quarry operations or erosion. Portions of the intermediate...deer hunting shelter, exposing materials from the lower intermediate zone with sparse mineralization similar...an unusual alteration zone immediately above the lower contact of the dike was exposed. This zone contains |  | | Journal (article/letter/editorial) | | interval of 114 600-587 Ma (Liz et al., 2005; Sommer et al., 2006; Gastal et al., 2006). 115 The four...a garnet-titanite hornblende granofels rich in albite, caused by a sodic fenitization). 207 The local...404 The conditions for dynamic metamorphism are lower greenschist facies involving 405 chlorite associated...carbonatites, 416 coarse grained garnet and abundant albite are common (Fig. 8d). 417 The hornblende is anhedral... 8e) under conditions of 421 amphibolite and lower/upper greenschist facies. 18 422 The titanite |  | | Journal (article/letter/editorial) | | possible water reservoir in the Earth’s mantle? H. Sommer & K. Regenauer-Lieb & B. Gasharova & D. Siret ...which is located Editorial handling: A. Beran H. Sommer : K. Regenauer-Lieb Institut für Geowissenschaften...Geowissenschaften, Universität Mainz, 55099 Mainz, Germany H. Sommer (*) Department of Geology, University of Botswana...Forschungszentrum Karlsruhe, P.O. Box 3640, 76021 Karlsruhe, Germany within point defects in the olivine crystal structure...synchrotron at the Forschungszentrum Karlsruhe, Germany, which provides high-brilliance, diffraction-limited |
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