 | Weedman, S.D., Scott, T.M., Edwards, Lucy E., Brewster-Wingard, G. L., Libarkin, J.C. (1995) Preliminary analysis of integrated stratigraphic data from the Phred #1 corehole, Indian River County, Florida. Open-File Report Vol. 1995 (95-824) US Geological Survey doi:10.3133/ofr95824 | Report (issue) | | lithostratigraphic units and the depositional history of the region. The top of the Floridan aquifer system, in the...the Ocala Limestone and the unnamed limestone is calcite; minor amounts of illite occur as a secondary mineral...sands) is a third zone characterized by dolomite, calcite, and illite. The largely unconsolidated sand, clay...obscures their internal structures. Intergranular calcite cement is rare and occurs in very small quantities...crystals; porosity is rarely occluded by calcite cement. Syntaxial calcite overgrowth cement commonly is observed |  | | Report (issue) | | Plant of the Pacific Portland Cement Co. near Gerlach........................ -............... ............- 14 Figure 3—The Leadville Mine north of Gerlach........................... 15 Figure 4—A Dry Lake...50 Figure 5—The Gerlach Hot Springs............................. 51 Figure 6—The Gerlach Swimming Pool...Fountain north of Gerlach.................. 53 Figure 8—Petrified Tree Trunk north of Gerlach................transitional zone between the rugged and well-watered region of the Sierra Nevadas through a series of longitudinal |  | | Journal (article/letter/editorial) | | δ13C from the corresponding interval at Nelben, Germany. Two lines of suggested correlation between negative...Permo-Triassic boundary in terrestrial sediments at Nelben, Germany, and Jimsar, NW China (Fig. 2). At the marine Cretaceous–Tertiary...terrestrial section at Jimsar (NW China) and Nelben, Germany (see Fig. 2). Payne et al. are referring to work...series of basalts from Denmark, Iceland, France, Germany, Azores, Hawaii, Arizona, and, in addition, samples...Faeroes-4 Faeroes-1 Santa Fe Pit, AZ, USA Stockum, Germany Le Broc, Massif Centrale, France Iceland-29 do-30 |  | | Report (chapter) | | service at the Church of the Saviour not far from the quarry. Another early visitor, John Covel, reports in...identifying the origins of terra sigillata from the region.) Hill includes terra Goltbergensis as a separate...variety: it was in his day ‘dug in many places in Germany, particularly at this time near Hasselt’ – now...(b and d) Seichawer and (c and h) Laubach, in Germany. Sedgwick Museum, Cambridge. pp. 200– 201), who...of medicinal clay. Another source was Laubach (Hesse): in the late seventeenth or early eighteenth century |  | | Report (issue) | | samples from thicker Harleyville sections in the region typically are assigned to upper Eocene Zone NP...chateauneufii Head et al. Membranophoridium aspinatum Gerlach Charlesdowniea stellata Damassa Samlandia chlamydophora...fiscellata de Coninck Pentadinium laticinctum Gerlach (vermiculate forms) C X Deflandrea heterophlycta...biformoides (Eisenack) Eaton X X Pentadinium laticinctum Gerlach subsp. laticinctum X X X X Samlanidia chlamydophora...common lithology in Chicora sections throughout the region (Van Nieuwenhuise and Colquhoun, 1982; Powell and |  | Hoernle, Kaj, Tilton, George, Le Bas, Mike J., Duggen, Svend, Garbe-Schönberg, Dieter (2002) Geochemistry of oceanic carbonatites compared with continental carbonatites: mantle recycling of oceanic crustal carbonate. Contributions to Mineralogy and Petrology, 142 (5) 520-542 doi:10.1007/s004100100308 | Journal (article/letter/editorial) | | volcanic rocks from these islands (18.7–19.9; Gerlach et al. 1988; Kokfelt 1998). We interpret calcio-carbonatites...the degree of recrystallization, replacement of calcite by secondary dolomite and elevated ¶13C and ¶18O...University of Kiel, Wischhofstrasse 1-3, 24148 Kiel, Germany E-mail: khoernle@geomar.de Tel.: +49-431-6002642...University of Kiel, Olshausenstrasse 40, 24118 Kiel, Germany Editorial responsibility: J. Hoefs Carbonatites...1973; Lancelot and Allegre 1974; Le Bas 1984; Gerlach et al. 1988; Hoernle and Tilton 1991; Kogarko 1993; |  | Hommel, Johannes, Gehring, Luca, Weinhardt, Felix, Ruf, Matthias, Steeb, Holger (2022) Effects of Enzymatically Induced Carbonate Precipitation on Capillary Pressure–Saturation Relations. Minerals, 12 (10) 1186 doi:10.3390/min12101186 | Journal (article/letter/editorial) | | Stuttgart, Pfaffenwaldring 61, 70569 Stuttgart, Germany Institute of Applied Mechanics, University of Stuttgart...Stuttgart, Pfaffenwaldring 7, 70569 Stuttgart, Germany Correspondence: johannes.hommel@iws.uni-stuttgart...and calcium chloride (both MERCK© , Darmstadt, Germany) in deionized water at equimolar concentrations...suspending jack-bean meal (Sigma Aldrich© , Darmstadt, Germany) in deionized water at a concentration of 5 g/L...type neMESYS 100N) from CETONI GmbH, Korbussen, Germany, at controlled flow rates using 2.5 mL glass syringes |  | | Journal (article/letter/editorial) | | mantle source component of carbonatites Že.g., Gerlach et al., 1988; Hoernle and Tilton, 1991.. The Nd...Metamorphic Province ŽFig. 1., a tectonically diverse region that developed approximately 2.0 to 1.0 Ga ago...earliest of the carbonatite intrusions ŽFig. 2.. Calcite is the sole carbonate phase. The calciocarbonatites...Ž"perthite and phlogopite. phenocrysts set in a calcite-rich groundmass that may itself contain up to 20%...the dykes. An early generation of coarse-grained calcite, heavily dusted with magnetite, occurs in a few |  | | Journal (article/letter/editorial) | | it resists heat remarkably well. According to Gerlach,1 it is obtained at two or three places, but the...the only one which I have examined is a quarry some height up on the left bank of the valley, rather above...sufficient interest to justify a brief notice.2 The quarry is a small one, and the outcrop, so far as we could...(in another branch of the Val d'Anniviers). 2 Gerlach, loc. cit. and Lief, xxvii, pp. 87-90, mentions...and there is a grain or two of pyrite. A little calcite, obviously secondary, and perhaps slightly dolomitic |  | | Journal (article/letter/editorial) | | the Kellwasser bituminous limestone horizons in Germany, has been the subject of active debate for several...800 g of sample containing as much brachiopod calcite as possible was taken from approximately every...the FFB extinction event as many sections in the region are expanded, continuous and well-dated (e.g.,...came from Psie Górki (Fig. 3), a small abandoned quarry in the suburbs of Kielce at the top of the hill...brachiopod shell calcite with negligible matrix was used for analysis because biogenic calcite contains a much |  | | Journal (article/letter/editorial) | | THE FORMER WILHELMINE MINE, SPESSART, BAVARIA, GERMANY Martin OKRUSCH§ Mineralogisches Institut, Universität...Würzburg, Germany Joachim A. LORENZ Graslitzer Str. 5, D–63791 Karlstein am Main, Germany Stefan WEYER...Senckenberganlage 28, D–60325 Frankfurt am Main, Germany Abstract The vein-type copper mineralization in...mine, Sommerkahl, Spessart, northwestern Bavaria, Germany, is hosted by metamorphic rocks of the Spessart...activity, thermochemical sulfate reduction, Spessart, Germany. Sommaire La minéralisation cuprifère en veines |  | Li, Chenyang, Zhong, Shuang, Zhang, Fengjun, Wang, Zhi, Jiang, Fuhuan, Wan, Yuyu (2017) Response of microbial communities to supercritical CO2 and biogeochemical influences on microbially mediated CO2-saline-sandstone interactions. Chemical Geology, 473. 1-9 doi:10.1016/j.chemgeo.2017.09.026 | Journal (article/letter/editorial) | | ureolytic activity of Bacillus pasteurii could drive calcite precipitation (Mitchell et al., 2009; Mitchell...(quantitative PCR) Our target was the V3–V4 hypervariable region of the bacterial 16S rRNA gene. After DNA extraction...CO2-saline-sandstone interactions Carbonates, such as calcite and siderite, play an important role in mineral...(Xu et al., 2010). In this study, more secondary calcite and siderite formed on the surface of sandstone...microbialmediated experiment (Fig. 4c), the majority of calcite was biomineralized after 95 days when the precipitation |  | | Journal (article/letter/editorial) | | 0016-7037/89/$3.00 + .oO An unusual mantle source region for nephelinites from the Oslo Rift, Norway E....series of lavas and their constituent pyroxenes and calcite from near the town of Skien in the Permo-Carboniferous...shows little change from one group to the next. Calcite segregations in the basaltic rocks show 6’-‘C =...accompanied the initiation of rifting in the Oslo Region ( SEGALSTAD, 1978). Also, Skien is within a short...groundmass phase. Some of the nephelinites contain calcite as both amygdule fillings and millimeter-size spherical |  | Dupraz, Sebastien, Fabbri, Antonin, Joulian, Catherine, Dictor, Marie-Christine, Battaglia-Brunet, Fabienne, Ménez, Bénédicte, Crouzet, Catherine, Henry, Benoît, Garrido, Francis (2013) Impact of CO2 concentration on autotrophic metabolisms and carbon fate in saline aquifers – A case study. Geochimica et Cosmochimica Acta, 119. 61-76 doi:10.1016/j.gca.2013.05.027 | Journal (article/letter/editorial) | | presence of 36% (w/w) of dolomite and 2.6% (w/w) of calcite polymorphs. No detectable presence of organic carbon...activity (%) ±5% Methanogen activity (%) ±5% Calcite SI Dolomite SI Dissolved CaMg(CO3)2 (millimolal)...crushed rock). Knowing that the initial amount of calcite polymorphs per flask was less than that value (i...has been supported through funding by the Centre region (France), FEDER, DRRT and BRGM within the framework...Energy Procedia 4, 4591–4598. Cunningham A. B., Gerlach R., Spangler L., Mitchell A. C., Parks S. and Phillips |  | | Journal (article/letter/editorial) | | Bochum, Institut f% Mineralogie, D-463 E&hum, West Germany ‘Earth Sciences Division, Lawrence Berkeley Laboratory...analyses. and then we added the carbon from vein calcite, using macroscopicaliy estimated H. 3092 Staudigel...samples with >2 wt% CO2 as (possibly) containing calcite veins, we calculated an average CO* for the altered...composites reaches “outgassed” CO2 levels of 0.045 wt% (GERLACH, 1989) at 1140 m depth and results in an average...estimate. 3093 Buffering of atmospheric CO*by calcite precipitation in the ocean (3) From 1140 m to the |  | Barker, A. K., Troll, V. R., Ellam, R. M., Hansteen, T. H., Harris, C., Stillman, C. J., Andersson, A. (2012) Magmatic evolution of the Cadamosto Seamount, Cape Verde: beyond the spatial extent of EM1. Contributions to Mineralogy and Petrology, 163 (6) 949-965 doi:10.1007/s00410-011-0708-2 | Journal (article/letter/editorial) | | Marine Sciences, Wischhofstr. 1-3, 24148 Kiel, Germany C. Harris Department of Geological Sciences, University...magmatic differentiation (e.g. Geist et al. 1988; Gerlach et al. 1988; Hoernle et al. 2000; Eisele et al...namely the northern and southern islands (Fig. 1; Gerlach et al. 1988). The Cape Verde Rise is associated...dominantly mafic with minor felsic volcanism (Gerlach et al. 1988; Davies et al. 1989; Doucelance et...alkaline, being basanitic to nephelinitic in nature (Gerlach et al. 1988; Davies et al. 1989). Volcanic rocks |  | | Journal (article/letter/editorial) | | mineral separate phases (apatite, biotite and calcite) from fifteen Cape Verde oceanic carbonatites (Atlantic...(ii) those of silicate rocks of the Cape Verde (Gerlach et al., 1988; Jørgensen and Holm, 2002; Doucelance...isotopic) characteristics of magmatic rocks (e.g. Gerlach et al., 1988; Doucelance et al., 2003). They occur...studied by geochemists during the last 30 years (Gerlach et al., 1988; Davies et al., 1989; Christensen...geographical location (see archipelago-scale studies: Gerlach et al., 1988; Doucelance et al., 2003) that are |  | Armstrong-Altrin, J. S., Verma, Surendra P., Madhavaraju, J., Lee, Yong Il, Ramasamy, S. (2003) Geochemistry of Upper Miocene Kudankulam Limestones, Southern India. International Geology Review, 45 (1) 16-26 doi:10.2747/0020-6814.45.1.16 | Journal (article/letter/editorial) | | well cuttings, stream sections, and in a number of quarry sections. The clastic and carbonate rocks contain...Samples were collected from surface outcrops and quarry sections. Nine representative samples were analyzed—three...is prevalent. The grains are cemented by sparry calcite. Sandy shell limestone (SSL). This litho-unit contains...leached out, and the voids are filled with sparry calcite, reflecting vadose-fresh water diagenetic environments... ______, 2000, Stratigraphy and petrography of quarry sections around Kudankulam area, Tamil Nadu: Journal |  | Mourão, Cyntia, Mata, João, Doucelance, Régis, Madeira, José, Millet, Marc-Alban, Moreira, Manuel (2012) Geochemical temporal evolution of Brava Island magmatism: Constraints on the variability of Cape Verde mantle sources and on carbonatite–silicate magma link. Chemical Geology, 334. 44-61 doi:10.1016/j.chemgeo.2012.09.031 | Journal (article/letter/editorial) | | magnesiocarbonatites represent residual liquids after calcite fractionation from carbonatite magma. © 2012 Elsevier...contrast between the southern and northern islands (Gerlach et al., 1988; Davies et al., 1989; Christensen...km-high, 1400–1600 km-wide swell occurring in a region where the oceanic lithosphere is 120 to 140 Ma...explains why the transition zone at the Cape Verde region is up to ≈30 km thinner than that of the ambient...southern islands (Fogo, Santiago and Maio; see Gerlach et al., 1988; Doucelance et al., 2003), all samples |  | Martins, Sofia, Mata, João, Munhá, José, Mendes, Maria Hermínia, Maerschalk, Claude, Caldeira, Rita, Mattielli, Nadine (2010) Chemical and mineralogical evidence of the occurrence of mantle metasomatism by carbonate-rich melts in an oceanic environment (Santiago Island, Cape Verde) Mineralogy and Petrology, 99 (1) 43-65 doi:10.1007/s00710-009-0078-x | Journal (article/letter/editorial) | | unradiogenic reservoir, i.e., the lower mantle (Gerlach et al. 1988; Christensen et al. 2001; Doucelance...mantle end-member already described for Santiago (Gerlach et al. 1988; Davies et al. 1989; Doucelance et...and Sr, Nd, Pb and He isotopic signatures (e.g. Gerlach et al. 1988; Doucelance et al. 2003). Although...the southern islands (for radiometric ages see Gerlach et al. 1988; Torres et al. 2002; Jørgensen and...plutonic basement (Old Eruptive Complex; ≥ 20 Ma, Gerlach et al. 1988), submarine volcanic activity (comprising |  | Barry, P.H., Hilton, D.R., Füri, E., Halldórsson, S.A., Grönvold, K. (2014) Carbon isotope and abundance systematics of Icelandic geothermal gases, fluids and subglacial basalts with implications for mantle plume-related CO2 fluxes. Geochimica et Cosmochimica Acta, 134. 74-99 doi:10.1016/j.gca.2014.02.038 | Journal (article/letter/editorial) | | hydrothermal processes such as degassing and/or calcite precipitation. Basaltic glasses are also characterized...estimates of associated CO2 fluxes from the melt source region are possible. This is important because estimates...Jakobsson et al., 2008). Finally, the off-axis Vestfirðir region in northwest Iceland is characterized by tholeiitic...collected in the SISZ and 14 from the Vestfirðir region of the NW Peninsula. Samples were collected over...the Vestfirðir region. The lowest d13C value of the present study is from the Selfoss region of the SISZ |  | | Journal (article/letter/editorial) | | mainly by thermal decarbonation of hydrothermal calcite in veins that cut reservoir rocks. Formation of...CA ŽFarrar et al., 1995, 1999; Gerlach et al., 1998; McGee and Gerlach, 1998.. The formation of a dead...1., is the southernmost geothermal system in a region of elevated heat flow known as the Battle Mountain...of DV Fig. 1. Generalized geologic map of the region around DV, after Nimz et al. Ž1999.. DVGF s Dixie...dead zone region is highlighted in gray. The topographic contours are in meters. Cc s Calcite fumarole |  | | Journal (article/letter/editorial) | | 28 1, 5 0, 30 1, 2 Hz/C@ x103 by corrosion Calcite deposits Blocked; reason unknown. Iron sulphide...steam discharge deposits probably Blocked, calcite Calcite and/or Deposits H. ARMANNSSON, 0. G~SLASON...controlled by temperature only (Arnorsson, 1978). Calcite is thought to be the mineral controlling the carbon... MAGMATIC dioxide, sulphur dioxide, and water vapour (Gerlach, 1979, 1980a, b, c & d). Sulphur dioxide forms...concentrations in volcanic gases, adapted from Gerlach, (1979, 1980a, b, c & d) as well as the composition |  | | Journal (article/letter/editorial) | | volcanoes exist in similar physical environment near Gerlach in Washoe County, Nevada, and on the southeast...Observations, December 25, 1953 1119 Hot springs of the region 1111 Other mud-volcano areas 1120 Eruption of March...General 1120 Activity and observations on March 6, Gerlach hot springs, Washoe County, 1951 1113 Nevada 1120...analyses of thermal and meteoric waters from Lake City region and other mud-volcano areas 1114 2. Energy available... J. Russell, 1928, p. 436). Hot Springs of the Region In the eastern half of Modoc County Stearns et |  | | Journal (article/letter/editorial) | | wood. (A) Wood fibers mineralized with opal-A. Gerlach, Nevada, USA. (B) Cells showing incipient opal-CT...Institute for Mineralogy, TU Bergakademie Freiberg, Germany. Examples of CL applications include [59–67]. Figure...Carboniferous Flöha Formation, near Falkenau, East Central Germany. This specimen is from anatomically well-preserved...with intercellular spaces mostly unmineralized. Gerlach, Washoe County. (D) Transverse view of a single...crystals in Miocene wood, Black Rock Desert near Gerlach, Nevada, USA. (E) Small quartz crystals lining |
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