 | | Journal (article/letter/editorial) | | 45056 rakovajf@miamioh.edu Fluorapatite Acushnet Quarry Bristol County, Massachusetts N orth America...anywhere is the âRoebling apatiteâ 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...of apatite-bearing Alpine clefts is the Keystone quarry, Cornog, Pennsylvania. Colorless, transparent, |  | | Journal (article/letter/editorial) | | HOLGER SOMMER, ALFRED KRĂNER, SOSPETER MUHONGO AND CHRISTOPH HAUZENBERGER 247 SHRIMP zircon ages for...Palaeoproterozoic terrain of southwestern Tanzania Holger Sommer and Alfred Kröner Institut fĂŒr Geowissenschaften...UniversitĂ€t Mainz, D-55099 Mainz, Germany Corresponding author: Holger Sommer e-mail: sommerh@mail.uni-mainz...Geowissenschaften, UniversitĂ€t Mainz, D-55099 Mainz, Germany Now at Institut fĂŒr Mineralogie, UniversitĂ€t Graz...within the Mozambique belt of central Tanzania (Sommer et al., 2003; Vogt et al., submitted) as well as |  | | Journal (article/letter/editorial) | | the Ladick quarry has produced some phenakite associated with cassiterite. The Ladick quarry is operated...the zoning. A thin lower wall zone (10â15 cm) consists of moderately coarse microcline, quartz, and biotite...coarse microcline and quartz with miaroles in part filled by fluorite, and a coarse quartz-microcline core...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 |  | | 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 WâŹulfrath=NRW (grain...kaolinite-cement (K) in a Rotliegend-sandstone of NW Germany; f CL-images of the four types of zircons recognized |  | 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, UniversitaÌt Mainz, D-55099 Mainz, Germany (sommerh@mail.uni_mainz.de) 2 Dept. of Geology...(Mozambique, Malawi, Madagascar, Tanzania, Kenya) and lower * Present address: Institut fuÌr Mineralogie, UniversitaÌt...crustal terranes of the MB in East Africa and the lower grade, middle to upper crustal PanAfrican terranes...1991; Stern, 1994; Shackleton, 1996). 915 916 H. SOMMER ET AL. Fig. 1. SimpliïŹed geological map of the...within large shear zones (Muhongo, 1999). 918 H. SOMMER ET AL. Thermobarometric studies on high-grade |  | | Journal (article/letter/editorial) | | of the entropy relations in the low albiteâlow microcline series Artur Benisek1,*, Edgar Dachs1 and Herbert...UniversitĂ€t, Corrensstrasse 24, 48149 MĂŒnster, Germany 2 Abstract New heat capacity data obtained on...on 12 samples of the low albiteâlow microcline series are presented. They were measured by relaxation...Sinkankas (1968). From the Amelia albite, low microcline was prepared by ionexchange in molten KCl, for...transformationtwinned low microcline (perthitic amazonite from Prilep, Macedonia). The Prilep microcline was first treated |  | | Journal (article/letter/editorial) | | coeval with the emplacement of cross-cutting microcline-biotite rich granites at 1896 ± 29 Ma. Despite...granites (Wendt et al., 1972; Sommer et al., 2005) and rhyolitic agglomerate (Sommer et al., 2005). The Usagaran...(Whittingham, 1959; Mruma, 1989; Collins et al., 2004; Sommer et al., 2005). Both the Isimani and Konse rocks...1974; Reddy et al., 2003; Collins et al., 2004; Sommer et al., 2005). The 2.7 Ga ages suggest incorporation...biotite and are often rich in large phenocrysts of microcline (KĂŒrsten, 1963). To the north of the main Ndembera |  | | Journal (article/letter/editorial) | | MARKLâ, MICHAEL MARKS, GREGOR SCHWINN AND HOLGER SOMMER INSTITUT FUÌR MINERALOGIE, PETROLOGIE UND GEOCHEMIE...SITAÌT, WILHELMSTRASSE 56, D-72074 TUÌBINGEN, 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...clinopyroxene are enclosed in a mixture of albite, microcline, texturally later aegirine pyroxene, and amphibole |  | Ferreira, Valderez P., Sial, Alcides N., Pimentel, Marcio M., Armstrong, Richard, GuimarĂŁes, 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. VĂ€isĂ€nen 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 |  | | Journal (article/letter/editorial) | | Am Roten Berg, SchneebergâNeustĂ€dtel, 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)âą7H2O...also from the Pucher Shaft, Schneeberg, Saxony, Germany. Occurrence: Associated minerals are: beudantite...Na4Zr2Si10O26âą9H2O M ONOCLINIC Locality: Poudrette Quarry, Mont Saint-Hilaire, Rouville County, Quebec, Canada |  | | Journal (article/letter/editorial) | | al. 1995; VrĂĄna et al. 2004; Fritz et al. 2005; Sommer et al. 2005); the MesoproterozoicâNeoproterozoic...2001; Sommer et al. 2003; Tenczer et al. 2006; Vogt et al. 2006; Hauzenberger et al. 2007; Sommer & Kröner...Grtporhyroblasts AS19 31874 714 350 871 8577 36 Microcline AS21 31876 714 299 870 8675 36 Metapelite...optical and scanning elec- Sil + white mica + Qz; Microcline Fabric Recrystallization of fine-grained Qz-Sil-Bt...Re-equilibration of perthite to microcline Re-equilibration of perthite to microcline Amp+Pl corona on Grt Locally |  | | Journal (article/letter/editorial) | | Heidelberg, Germany b GfB Baustoffprufstelle ERFT-Labor GMBH, Von-Stein-Str. 20, 53879 Euskirchen, Germany š c... RWTH-Aachen, Lochnerstr. 4-20, 52056 Aachen, Germany Received 6 March 1998; accepted 1 May 2000 Abstract...EastardennesâEifel nappe ĆœLinksrheinisches Schiefergebirge, GermanyâBelgium. was completed with KâAr dating of separated...model prediction are caused by the occurrence of microcline as an accessory K-bearing mineral phase. The...development; it represents at least a minimum age. The microcline age Ćœ242.8 " 6.0 Ma. of the Hill intrusion may |  | | Journal (article/letter/editorial) | | plagioclase, biotite and quartz and include a few microcline-rich, rare biotite pink alkali granites whereas...the Proterozoic ones include mainly undeformed, microcline-rich, pink alkali granites. Although there are...Möller et al. (1998), Muhongo et al. (2001) and Sommer et al. (2003) arrived at a similar conclusion....traverse are mainly composed of alkali feldspar (microcline) with a characteristic pinkish colour, quartz...deformed gray granites with occasional pink, microcline-rich alkali granites. From Rungwa to Makongolosi |  | | Journal (article/letter/editorial) | | petrological, geochemical and geochronological approach H. Sommer, A. KroÌner, J. Lowry PII: DOI: Reference: S0024-4937(17)30184-6...2016 21 May 2017 Please cite this article as: Sommer, H., KroÌner, A., Lowry, J., Neoproterozoic eclogiteto...Geowissenschaften, UniversitĂ€t 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 |  | | Book (volume) | | colors), jasper. BIBB COUNTY MACON: ï at Holton Quarry, 7Âœ mi. NWïŸagate; ï N of Calloway airport at rd...1Âœ mi., in Knox dolomite exposed in an abandoned quarryïŸ Barite, Calcite, Fluorite (purple cubes), Galena...shark teeth. CHATTOOGA COUNTY GORE, N 6 mi., along lower slopes of Taylor RidgeïŸHalloysite. SUMMERVILLE:...US 27: (a) along both sides of Hwy.ïŸagate; (b) quarry on W side of rd.ïŸagate, chalcedony, chert, opal;...W 3 mi. and 2 mi. N: (a) at the Marble Springs QuarryïŸgemmy marble (red and green); (b) E, in Taylor |  | 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...apogranites and albitites with secondary albite and lower proportions of muscovite, at temperatures of about...Albitization was followed by propylitization at lower temperatures. According to apatite fission track...grained, and the major minerals are oligoclase, microcline, quartz, and biotite. Chlorite, white mica, carbonate...are constituted mostly by euhedral to subhedral microcline, albitic plagioclase, biotite, generally replaced |  | | Journal (article/letter/editorial) | | Eberhard-Karls-UniversitaĂt, Wilhelmstrasse 56, 72074 TuĂbingen, Germany E-mail: markl@uni-tuebingen.de Editorial responsibility:...clinopyroxene are enclosed in a mixture of albite, microcline, a second generation of needle-shaped clinopyroxene... 464 Freiburg, Germany, and on a JEOL 8900 at the University of TuĂbingen, Germany. Natural standards...amphiboles from all other lujavrite samples (Markl and Sommer, unpublished data), the amphiboles of ocellar rocks...lujavrite found in the Ilimaussaq complex (Markl and Sommer, unpublished data). Elements are plotted against |  | | Journal (volume) | | diorite; 3, quartz diorite and granodiorite; 4, microcline granite; 5, granite pegmatite, tourmaline-bearing;...Obira, Japan (F ord , 1903); 19, R adautal, Harz, Germany (Fromme, 1909). The physical properties of the...specific gravity of the analyzed ferroan axinites is lower than those of the purest manganoan axinites. This...error. The values given in literature generaUy are lower, ranging from a bou t 3.02 to 3.10. The specific...eferen('c :Mineral Anhydrite, Berchtesgaden, Bavaria, Gennanv ..... . ..... Gypsum , Lockport. N. Y |  | | Journal (volume) | | diorite; 3, quartz diorite and granodiorite; 4, microcline granite; 5, granite pegmatite, tourmaline-bearing;...Obira, Japan (F ord , 1903); 19, R adautal, Harz, Germany (Fromme, 1909). The physical properties of the...specific gravity of the analyzed ferroan axinites is lower than those of the purest manganoan axinites. This...error. The values given in literature generaUy are lower, ranging from a bou t 3.02 to 3.10. The specific...eferen('c :Mineral Anhydrite, Berchtesgaden, Bavaria, Gennanv ..... . ..... Gypsum , Lockport. N. Y |  | | Journal (article/letter/editorial) | | flow episode occurred during the Cimmerian phase (Sommer, 1978). A new stage of tectonic extension occurred...the coastal shallow-marine environments of the Lower Brent Group, to the alluvial or deltaic interbedded...cored (Figure 2). The Ness B is divided into a lower tide-dominated section and an upper section of three...separated by thin lagoonal or coaly-marsh facies. The lower Tarbert Formation comprises two upper shorefaces...detrital grains are quartz, feldspars (albite and microcline), mica, and various types of lithic fragments |  | | Book | | MineralogicalRecord.com I IIMORIITE-(Y) EUROPE FRANCE Trimouns quarry, Luzenac, Ariege. Operated for talc since the beginning...beginning of the 20th century, the Trimouns quarry became well known to collectors around 1990 for the...Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series of incompletely...consists of ilmenite. magnetite, anatase, biotite, microcline and minor fluorapatite (Robinson and Chamberlain...1991). Simdeled, Aust-Agder. Early in 1999, in a quarry near S~ndeled, collectors opened a pocket containing |  | | 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 ................................. |  | | Journal (volume) | | Siid-Pohjanlllaa .... . ..... 65 7. ::\ILS EDEDL\X, Microcline Porphyroblasts with Myrmekite l{ims ...........which are of large dimensions in the upper and lower masses, smaller in the middle one. In the upper...sense in which it is used in petrofabrics) , of the lower slumped mass and displays the same type of clay...caused a great decrease in diameter of the upper and lower parts of the test and no decrease of the diameter...mit rotbraunen Feldspatkristallen besteht». Im Sommer 1913 wurde das Gestein von Berghell bei seinen |  | | Journal (volume) | | Siid-Pohjanlllaa .... . ..... 65 7. ::\ILS EDEDL\X, Microcline Porphyroblasts with Myrmekite l{ims ...........which are of large dimensions in the upper and lower masses, smaller in the middle one. In the upper...sense in which it is used in petrofabrics) , of the lower slumped mass and displays the same type of clay...caused a great decrease in diameter of the upper and lower parts of the test and no decrease of the diameter...mit rotbraunen Feldspatkristallen besteht». Im Sommer 1913 wurde das Gestein von Berghell bei seinen |  | Yamasaki, S., Zwingmann, H., Yamada, K., Tagami, T., Umeda, K. (2013) Constraining the timing of brittle deformation and faulting in the Toki granite, central Japan. Chemical Geology, 351. 168-174 doi:10.1016/j.chemgeo.2013.05.005 | Journal (article/letter/editorial) | | points of gouges M252.9R and M403.7R. (b) and (d) lower hemisphere, equal-area plot of gouge orientation...kaolinite (berthierine) and microcline and albite are present, with a signiïŹcant lower amount of 2M1 illite...6â10-m fractions and decreases with grain size. No microcline or albite can be detected in the b 0.1 ÎŒm fraction...amount of the high-temperature illite (Mica 2M1) is lower in the coarser 2â6 and 6â10 ÎŒm fractions compared...variable amount of K-bearing contamination i.e. microcline (8 to ~1%) in the b 0.4 to 6-10ÎŒm fraction. However |
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