 | | Journal (article/letter/editorial) | | geochemical characteristics. The Spessart pluton has lower εNd(T) values (−2.3 to −3.0) and higher 87Sr/86Sri...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...The final closure of the Rheic ocean during the Lower Carboniferous led to oblique Variscan collision...subdivided into two major tectonic units (Fig. 3). The lower tectonic unit, occupying the central part of the |  | Seidel, Eberhard, Okrusch, Martin, Kreuzer, Hans, Raschka, Helmut, Harre, Wilhelm (1976) Eo-Alpine Metamorphism in the Uppermost Unit of the Cretan Nappe System — Petrology and Geochronology. Contributions to Mineralogy and Petrology, 57 (3) 259-275 doi:10.1007/bf03542937 | Journal (article/letter/editorial) | | aphisches Institut, D-3300 Braunschweig, F.R. Germany Hans Kreuzer, Helmut Raschka, and Wilhelm Harre...Geowissenschaften und Rohstoffe, D-3000 Hannover 51, P.R. Germany Abstract. The uppermost unit of the Cretan nappe...assemblage brown hornblende + diopside + plagioclase (An 50) while associated metapelitic gneisses...biotite + sillimanite (andalusite) ± K-feldspar + plagioclase (An 40-50) + quartz. Judging from relevant experimental...characterized by a granoblastic mosaic texture formed by plagioclase (0.20.5, sometimes up to 2 mm in diameter), brown |  | | Book | | Te:x:t illustra.tions. Wrapper. (1908) LoNDON DISTRICT. 1 0 . Sus-So1Ls from a Sanitary point of view... .. . .. 5 KA.OLINS.-Great Britain, France, Germany, Austria, Sweden, Denmark, Spain, Portugal, Italy... .. . . .. . .. ,, 2. Map of the St. A ustell district .. . .. . .. . ... . •. ,, 3. Map of part of Bodmin.... . .. ,, 4. Map of the Dartmoor Chi}?-a-clay district . . . .. . ... . .. ,, 5. Diagram of a Cornish...... . .. ,, 12. Geological map of St. Y rieix district . .. .. . . .. . .. ,, 13. Diagram of Quarrie8 |  | | Book | | Carolathine, a material similar to allophane but lower in water content, was described by Sonnenschein...It is named from the locality, Askana, Ozurgety district, Georgia, vol- Transcaucasia. Belyankin, D....Elbruss near which it is found in the Karatschaev district, Northern Caucasus. Grim (1942) questions the...white to yellowish-white clay from Bergnersreuth, Bavaria, which he called "glagerite" but Dana (1892) says...amygdaloidal cavities at Sasbach in the Kaiserstuhl, Germany. It occurs in layers which form a glazed coating |  | | Journal (article/letter/editorial) | | physical–chemical regime (North-Bavarian Kaolin Mining District, Germany) Harald G. Dill a,⁎, Stephan Kaufhold b, Angela...University, Welfengarten 1, D-30167 Hannover, Germany Bundesanstalt für Geowissenschaften und Rohstoffe...Rohstoffe, D-30631 Hannover, P.O. Box 510163, Germany c Bundesanstalt für Geowissenschaften und Rohstoffe,... Wilhelmstraße 25-30, Germany d Schönwalder Straße 60, D-13585 Berlin, Germany b a r t i c l e i n...Sedimentological–mineralogical facies Mesozoic SE Germany ⁎ Corresponding author. E-mail address: haralddill@web |  | | Journal (article/letter/editorial) | | 30 Granite, Sr/Rb, relation, sedimentary rocks, lower Cambrian, United States, Massachusetts (Fairbairn... data, isotopes, uranium, ratios, Precambrian, lower Paleozoic, Europe, Scotland, Carn Chuinneag (Pidgeon... gneiss, Sr/Rb, isochrons, data, metamorphism, lower Precambrian, Hebron Gneiss, Labrador (Barton, Jackson...rocks, gneiss, whole rock, Sr/Rb, isochrons, data, lower Precambrian, Archean, Labrador, Saglek Bay (Hurst...data, aureoles, metamorphism, contact, intrusions, lower Precambrian, Montana, south, Stillwater Complex |  | | Journal (article/letter/editorial) | | concentrations of Rb and Sr differed significantly in plagioclase and microcline; such data from feldspars in metamorphic...between these two important rock-groups. • In 1926 Stahl coined the name Outjo Formation to include the rocks...of the Franzfontein Range (the unit designated ' Lower—mainly dolomites' of Fig. 2 of this paper) together...carbonateclastic sequence of the eastern Kaokoveldt; Stahl (op. cit., p. 147) believed that these rocks were...introduced, in deference to the pioneer work of Alfred Stahl, to include the correlative portions of the Otavi |  | | Journal (article/letter/editorial) | | including Steven Chamberlain, Bill Condon, Dean Stahl, Charlie Bowman, and Eric Edie. Jerry Van Velthuizen...orientation within the pegmatite. Microcline and plagioclase form the matrix for the pyroxene aggregates,...occurs as a transparent greenish-brown varnish on plagioclase crystal faces (fig. 6). Figure 6. A varnish made...Ca2(Al4Si8O22)•13H2O, occurs with titanite crystals and plagioclase as coatings of minute white crystals (fig. 7)...Chabazite has probably formed as an alteration of plagioclase. Diopside, CaMgSi2O6, is found as prismatic dark |  | | Journal (article/letter/editorial) | | com/locate/epsl Constraining the cooling rate of the lower oceanic crust: a new approach applied to the Oman...Abstract Knowledge of the cooling rate of newly formed lower oceanic crust is critical in constraining models...this study we calculate the cooling rate of the lower oceanic crust based on the closure temperature of...temperatures shows that the cooling rates for the lower oceanic crust decrease with depth, changing rapidly...upper third of the gabbros but more slowly in the lower two-thirds. There is several orders of magnitude |  | | Report (issue) | | 154-213, 1900. Bacon, Walter S. 1. Character of the Franconia sandstone at Taylors Falls, l\1innesota. E. M...Barrows, W. A. See also Zapffee, C., 5 1. The Cuyuna district, South Range, Iron ores: II'. Trd. Rey., yol....1890. 4. A fibrous intergrowth of augite and plagioclase, resembling a reaction rim, in a Minnesota gabbro:... 7 figs., April 1938. Berg, Robert R. 1. The Franconia formation of Minnesota and Wisconsin. Ph. D. thesis... Some geological features of the vicinity of Franconia, Minn. [abstract]: Minn. Acad. Sci. Bull., vol |  | | Journal (article/letter/editorial) | | Mineralogisch-Petrographisches Institut der Universit/it Kiel, Germany Received August 14, 1973 Abstract. Coexisting zoisite...pointed out t h a t in the Fecontaining system the lower stability temperature of zoisite should be significantly...amphibolites, zoisite m a y only occur as microlites in plagioclase, whereas clinozoisite crystallizes adjacent to...of biotite schists in vol.-% Biotite Quartz Plagioclase Clinozoisite Zoisite Calcite Actinolite Sphene...17-20% in the core and 24-30% at the rim of the plagioclase grains have been determined on the universal |  | | Journal (article/letter/editorial) | | arsenic mobilization in South Asian aquifers Mason O. Stahl a,⇑, A.B.M. Badruzzaman c, Mehedi Hasan Tarek c...author. E-mail address: stahlm@union.edu (M.O. Stahl). https://doi.org/10.1016/j.gca.2020.08.012 0016-7037/Ó...Southeast Asia remains incompletely understood. M.O. Stahl et al. / Geochimica et Cosmochimica Acta 288 (2020)...2011; McArthur et al., 2011; Lawson et al., 2013; Stahl et al., 2016; Nghiem et al., 2019). Resolving these...In this case, enhanced recharge from ponds would lower As concentrations simply by dilution. Considering |  | | Journal (article/letter/editorial) | | %; relic brown hornblende: trace; sericitized plagioclase (samples CA 4 and CA 10); fas~aite: 20 wt.% (sample...observed in one sample containing sericitized plagioclase and brown hornblende. Dolomite is present in...metapelitic rocks containing quartz, sericitized plagioclase, sillimanite and K-feldspar (khondalite). Graphite...carbonate--calc-silicate rocks of Carm~ba from the corresponding lower Precambrian rocks of the same block (Sighinolfi...marine brines (Rye, 1966; Craig, 1969; Schoell and Stahl, 1972) or sulphur- and sulphide-rich limestones |  | | Journal (article/letter/editorial) | | Erlangen-Nürnberg, Schlossgarten 5a, 91054 Erlangen, Germany. thomas.angerer@uibk.ac.at 1 2 Despite the strong...all Tösens district ore (except Hochjoch) defines a low-Mn/high-Hg group. Most Nauders district ore (Knappental...Stilleweg 2, Hannover Germany; present address: Kiebitzweg, 104, 30880 Laatzen, Germany 3 Department of Lithospheric...Geowissenschaften und Rohstoffe (BGR, Hannover, Germany) carried out a reconnaissance survey of a hitherto...capacities can be extrapolated reasonably well to lower temperatures, i.e. from 50K to absolute zero by |  | | Journal (article/letter/editorial) | | particularly during the transition from greenschist to lower amphibolite facies (HAENDEL et al., 1986). The releaseof... and vitrinite reflectance (LUTZ et al., 1975; STAHL et al., 1977; DEINES, 1980; KEITEL, 1982). Despite...(KORSCH, 1983). To the east, Upper Jurassic and Lower Cretaceous strata are absent and gently-dipping...probably derived from deep, supermature sources (STAHL et al., 1977; SCHOELL, 1983). A number of gases...nitrogen-rich gases is well-defined and distinctly lower than that observed for the intrusive component. |  | | Journal (article/letter/editorial) | | J. HOEFS Goldschmidtstr. 1, D-34 GGttingen, Germany and M. FREY Mineralog.-Petrograph. Institut,...relationship has been observed in natural gases by STAHL (1974). Under equilibrium conditions isotope fractionations...of coals, which represents a similar process at lower temperatures (CoLOMBOet al., 1970). Due to these...Gotthard Massif may also contain clinozoisite and plagioclase (oligoclase-andesine, see FREY and ORVILLE, 1974)...the Urseren Zone metamorphic grade reaches the lower-grade greenschist facies with a temperature estimate |  | | Book (edition) | | Mineralogie, Malteserstr. 74-100, D-12249 Berlin, Germany Earth Science Department / College of Science,...Feld 236, D-69120 Heidelberg, Germany Sodenstr. 19, D-12309 Berlin, Germany Graslitzer Str. 5, D-63791 Karlstein...Karlstein am Main, Germany Ludwig-Maximilians Universität, Department für Geo- und Umweltwissenschaften...Ressourcengeologie, Luisenstr. 37, D80333 München, Germany Bundesanstalt für Geowissenschaften und Rohstoffe...Rohstoffe (BGR), Stilleweg 2, D-30655 Hannover, Germany Dr. Salah Al-Khirbash Prof. Dr. Rainer Altherr & |  | | Journal (article/letter/editorial) | | elsevier.com/locate/epsl Cooling rates in the lower crust of the Oman ophiolite: Ca in olivine, revisited...Abstract Debate over the mechanism of accretion of the lower oceanic crust has centered around the gabbro glacier...systematic variation of cooling rate with depth in the lower crust of the Khafifah section in the Wadi Tayin...thermally viable mechanism for accretion of oceanic lower crust. © 2007 Elsevier B.V. All rights reserved...igneous accretion and hydrothermal cooling of the lower oceanic crust remain poorly understood. Currently |  | | Journal (article/letter/editorial) | | Wilhelmstr.56, D-7400 Ttibingen I, Federal Republic of Germany 2 Technische Universitfit Berlin, Institut for...central part of the Tauern Window. Successively lower temperatures are found to the north and to the south...lithological-tectonic units, the Zentral- gneis and the lower and upper Schieferhfille. The Zentralgneisses are...composition with intercalated paragneisses. The lower and the upper Schieferhfille consist of imbricate...Zentralgneisses, together with the main part of the lower Schieferhtille, are polymetamorphic rocks with an |  | | Journal (article/letter/editorial) | | 0.005--0.006. Sometimes a zonal structure with lower triclinicity exists at the rim. These undulatory...Universit~t Kiel, 28 Kiel, OlshausenstraBe 40--60, Germany; Prof. Dr. G. MORTEANI, Institut fiir Angewandte...Lagerstiittenforschung, i Berlin 12, Strage des 17. Juni 185, Germany. 422 P. RAASE et al. - - T h e potassic f e...oxygen isotope analyses (FRIEDRIGHSEN,MtiLLEn & STAHL,1973; HOERNES~ FRIEDRICHSEN,1974). The central part...the central part. The ,,Schicferh/ille", in its lower part, mainly consists of paragneisses and mica schists |  | | Report (issue) | | Czechoslovakia Denmark . .. Finland ,. . . France . .. Germany . .. Italy . . . . .. Ju goslavia .. . .. . ....notable, occurrences are those of Czechoslovakia, Germany, France United States and Japan. 1, Residual deposits...out that the majority of china-clay deposits in Germany occur near beds of lignite. The relation between...der Kaolinlagerstatten in Deutschland, by ...il. Stahl; Archiv. fur Lagerstatten, Geol. Landesanstalt,...t1sed suc,c essfully for this purpose. Where plagioclase-felspars have contributed to the formation of |  | | Report (issue) | | reconnaissance of the Roselancl-Bryant portion of the district; and again in the spring of 190? in company with...began a general reconnaissa,nce of the entire district preparatory to systematic study and mapping. Mr...part of September in the district. Systematic study was begun in the district early in June, 1909, when...and elements as silicon, in some cases and, like lower valence elements in being tetravalent, with a zirconium...Survey reports. The statement follows:a "In this quarry occur several interesting minerals, the most rema |  | | Journal (article/letter/editorial) | | those of calcite in the altered rocks in the same district, suggesting that the carbon in ore calcites was...the Tottori formation of the upper Daijima stage (lower Miocene) and those from Toyoha were collected from...these country rocks occur as replacement of plagioclase and pyroxene pheuocrysts; calcite occurring as...m o = montmorillonite, ms = muscovite, pl = plagioclase, px = pyroxene, py = pyrite, qz = quartz, r1...whereas rocks with relict pyroxene and calcic plagioclase have calcites with higher c~80 values (e.g., |  | | Journal (article/letter/editorial) | | January fir Chemie, Saarstr. 23, D-6500 Mainz, W-Germany 1978; accepted in revised form 29 September...metamorphism, which in other areas has been shown to lower 613Ccarb values, it is most likely that the original...The prevalence in the amphibolites of basic plagioclase (bytownite. labradorite) and the occurrence of...distinct shift of some 2”&, in the negative lar to the lower values found in sediments. Conspidirection as compared...carbonate with minor garnet, epidote, hornblende, plagioclase and tourmaline As No.82 As No.82 zt;;s;;iment |  | | Journal (article/letter/editorial) | | 3392 Clausthal--Zellerfeld (Federal Republic of Germany) 2 Institute of Organic Chemistry, Technical University...3392 Clausthal--Zellerfeld (Federal Republic of Germany) (Received July 9, 1979; revised and accepted January...biotite model age of 294.6 + 3.3 Ma was obtained (Stahl et al., 1973). The granite existing in the center...to weathering. Disintegrable phases such as plagioclase and biotite diminish according to this specimen...was distinctly richer in plagioclase t h a n t h e o t h e r samples. Plagioclase is m o r e easily dis- |
|
