Wiegand, Bettina A.

[["dc.bibliographiccitation.firstpage","62"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Journal of Hydrology"],["dc.bibliographiccitation.lastpage","71"],["dc.bibliographiccitation.volume","378"],["dc.contributor.author","Wiegand, Bettina A."],["dc.date.accessioned","2018-11-07T11:22:05Z"],["dc.date.available","2018-11-07T11:22:05Z"],["dc.date.issued","2009"],["dc.description.abstract","delta Sr-87 values and Ca/Sr ratios were employed to quantify solute inputs from atmospheric and lithogenic sources to a catchment in NW Germany. The aquifer consists primarily of unconsolidated Pleistocene eolian and fluviatile deposits predominated by >90% quartz sand. Accessory minerals include feldspar, glauconite, and mica, as well as disperse calcium carbonate in deeper levels. Decalcification of near-surface sediment induces groundwater pH values up to 4.4 that lead to enhanced silicate weathering. Consequently, low mineralized Ca-Na-Cl- and Ca-Cl-groundwater types are common in shallow depths, while in deeper located calcareous sediment Ca-HCO3-type groundwater prevails. delta Sr-87 values and Ca/Sr ratios of the dissolved pool range from 7.3 to -2.6 and 88 to 493, respectively. Positive delta Sr-87 Values and low Ca/Sr ratios indicate enhanced feldspar dissolution in shallow depths of less than 20 m below soil surface (BSS), while equilibrium with calcite governs negative delta Sr-87 values and elevated Ca/Sr ratios in deep groundwater (>30 m BSS). Both positive and negative delta Sr-87 values are evolved in intermediate depths (20-30 m BSS). For groundwater that is undersaturated with respect to calcite, atmospheric supplies range from 4% to 20%, while feldspar-weathering accounts for 8-26% and calcium carbonate for 62-90% of dissolved Sr2+. In contrast, more than 95% of Sr2+ is derived by calcium carbonate and less than 5% by feldspar dissolution in Ca-HCO3-type groundwater. The surprisingly high content of carbonate-derived Sr2+ in groundwater of the decalcified portion of the aquifer may account for considerable contributions from Ca-containing fertilizers. Complementary tritium analyses show that equilibrium with calcite is restricted to old groundwater sources. (C) 2009 Elsevier B.V. All rights reserved."],["dc.description.sponsorship","DFG [Wi-1916]"],["dc.identifier.doi","10.1016/j.jhydrol.2009.09.013"],["dc.identifier.isi","000271679700005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/55920"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","1879-2707"],["dc.relation.issn","0022-1694"],["dc.title","Tracing effects of decalcification on solute sources in a shallow groundwater aquifer, NW Germany"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1071"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Hydrogeology Journal"],["dc.bibliographiccitation.lastpage","1089"],["dc.bibliographiccitation.volume","21"],["dc.contributor.author","Rahman, Mohammad Azizur"],["dc.contributor.author","Wiegand, Bettina A."],["dc.contributor.author","Badruzzaman, A. B. M."],["dc.contributor.author","Ptak, Thomas"],["dc.date.accessioned","2018-11-07T09:22:01Z"],["dc.date.available","2018-11-07T09:22:01Z"],["dc.date.issued","2013"],["dc.description.abstract","A preliminary feasibility assessment of managed aquifer-recharge (MAR) techniques was undertaken for Dhaka City, Bangladesh. Considering the top impermeable-layer (TIL) thickness and the land-use classification, four primary MAR techniques have been suggested: (1) soil-aquifer treatment (SAT) for TIL thickness 0-8 m, (2) cascade-type recharge trenches/pits for TIL thickness 9-30 m, (3) aquifer storage, transfer and recovery (ASR/ASTR) for TIL thickness 31-52 m, and (4) use of natural wetlands to recharge water collected from open spaces. The study suggests that recharge trenches and pits will be the most appropriate MAR techniques, which can be implemented in most parts of the recharge area (ca. 277 km(2)). In case of a recharge trench, the lower parts (15-20 m) that are in direct contact with the aquifer can be backfilled with biosand filters with a reactive layer containing metallic iron (Fe-0) to offer pre-treatment of the infiltrated water. In addition to the suggested four techniques, the regional groundwater flow direction, from the northwest and northeast towards Dhaka City, may allow use of the aquifer as a natural treatment and transport medium for groundwater, if spreading basins are installed in the greater Dhaka area."],["dc.identifier.doi","10.1007/s10040-013-0978-z"],["dc.identifier.isi","000321968900010"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/29242"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1435-0157"],["dc.relation.issn","1431-2174"],["dc.title","Hydrogeological analysis of the upper Dupi Tila Aquifer, towards the implementation of a managed aquifer-recharge project in Dhaka City, Bangladesh"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1091"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Hydrogeology Journal"],["dc.bibliographiccitation.lastpage","1106"],["dc.bibliographiccitation.volume","28"],["dc.contributor.author","Hamdan, Ibraheem"],["dc.contributor.author","Ptak, Thomas"],["dc.contributor.author","Wiegand, Bettina"],["dc.contributor.author","Sauter, Martin"],["dc.date.accessioned","2020-12-10T14:11:08Z"],["dc.date.available","2020-12-10T14:11:08Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1007/s10040-019-02094-w"],["dc.identifier.eissn","1435-0157"],["dc.identifier.issn","1431-2174"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70974"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Development of a quantitative transport-time-based groundwater vulnerability model for non-point-source pollution in karst aquifers: a conceptual approach and example from the Tanour and Rasoun spring catchment, north-western Jordan"],["dc.title.alternative","Développement d’un modèle de vulnérabilité quantitative des eaux souterraines basée sur le temps de transport pour des pollutions diffuses d’aquifères karstiques: une approche conceptuelle et un exemple sur le bassin d’alimentation des sources de Tanour et Rasoun, nourd-ouest de la Jordanie"],["dc.title.alternative","Desarrollo de un modelo cuantitativo de vulnerabilidad de las aguas subterráneas a la contaminación de una fuente no puntual en los acuíferos cársticos basado en el tiempo de transporte: un enfoque conceptual y un ejemplo de la Cuenca del manantial de Tanour y Rasoun, en el noroeste de Jordania"],["dc.title.alternative","O desenvolvimento de um modelo quantitativo de vulnerabilidade das águas subterrâneas em aquíferos cársticos, baseado no tempo de transporte de uma fonte de poluição não pontual: uma abordagem conceitual, e o exemplo da bacia hidrográfica de Tanour e Rasoun, noroeste da Jordânia"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","101764"],["dc.bibliographiccitation.journal","Geothermics"],["dc.bibliographiccitation.volume","85"],["dc.contributor.author","Kölbel, Lena"],["dc.contributor.author","Kölbel, Thomas"],["dc.contributor.author","Sauter, Martin"],["dc.contributor.author","Schäfer, Thorsten"],["dc.contributor.author","Siefert, Dorothee"],["dc.contributor.author","Wiegand, Bettina"],["dc.date.accessioned","2020-12-10T14:24:22Z"],["dc.date.available","2020-12-10T14:24:22Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1016/j.geothermics.2019.101764"],["dc.identifier.issn","0375-6505"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/72226"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Identification of fracture zones in geothermal reservoirs in sedimentary basins: A radionuclide-based approach"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","300"],["dc.bibliographiccitation.journal","Marine and Petroleum Geology"],["dc.bibliographiccitation.lastpage","322"],["dc.bibliographiccitation.volume","77"],["dc.contributor.author","Duschl, Florian"],["dc.contributor.author","van den Kerkhof, Alfons M."],["dc.contributor.author","Sosa, Graciela"],["dc.contributor.author","Leiss, Bernd"],["dc.contributor.author","Wiegand, Bettina A."],["dc.contributor.author","Vollbrecht, Axel"],["dc.contributor.author","Sauter, Martin"],["dc.date.accessioned","2018-11-07T10:06:47Z"],["dc.date.available","2018-11-07T10:06:47Z"],["dc.date.issued","2016"],["dc.description.abstract","New petrographic and fluid inclusion data from core samples of Upper Permian dolomitic limestone (Hauptdolomit, Zechstein group, Stassfurt carbonate sequence) from a gas field located at the northern border of the Lower Saxony Basin (LSB) essentially improve the understanding of the basin development. The gas production at the locality is characterized by very high CO2 concentrations of 75-100% (with CH4 and N-2). Samples consist of fine grained, mostly laminated and sometimes brecciated dolomitic limestone (mudstone/wackestone) from the transition zone between the shallow water zone (platform) and the upper slope. The study focuses on migration fluids, entrapped as fluid inclusions in diagenetic anhydrite, calcite, and fluorite, and in syn-diagenetic microfractures, as well as on the geochemistry of fluorite fracture mineralizations, obtained by LA-ICP-MS analysis. Fluid inclusion studies show that the diagenetic fluid was rich in H2O-NaCl-CaCl2. Recrystallized anhydrite contains aqueous inclusions with homogenization temperatures (T-h) of ca. 123 degrees C, but somewhat higher Th of ca. 142 degrees C was found for calcite cement followed by early Fluorite A with Th of 147 degrees C. A later Fluorite B preserves gas inclusions and brines with maximum Th of 156 degrees C. Fluorite B crystallized in fractures during the mobilization of CO2-bearing brines. Crossing isochores for co-genetic aqueous-carbonic and carbonic inclusions indicate fluid trapping conditions of 180-200 degrees C and 900-1000 bars. delta C-13-isotopic ratios of gas trapped in fluid inclusions suggest an organic origin for CH4, while the CO2 is likely of inorganic origin. Basin modelling (1D) shows that the fault block structure of the respective reservoir has experienced an uplift of >1000 m since Late Cretaceous times. The fluid inclusion study allows us to, 1) model the evolution of the LSB and fluid evolution by distinguishing different fluid systems, 2) determine the appearance of CO2 in the geological record and, 3) more accurately estimate burial and uplift events in individual parts of the LSB. (C) 2016 Elsevier Ltd. All rights reserved."],["dc.description.sponsorship","EU [282900]"],["dc.identifier.doi","10.1016/j.marpetgeo.2016.06.020"],["dc.identifier.isi","000384861400020"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39159"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1873-4073"],["dc.relation.issn","0264-8172"],["dc.relation.orgunit","Abteilung Strukturgeologie und Geodynamik"],["dc.title","Fluid inclusion and microfabric studies on Zechstein carbonates (Ca2) and related fracture mineralizations - New insights on gas migration in the Lower Saxony Basin (Germany)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","139"],["dc.bibliographiccitation.issue","2-3"],["dc.bibliographiccitation.journal","Acta Hydrochimica et Hydrobiologica"],["dc.bibliographiccitation.lastpage","152"],["dc.bibliographiccitation.volume","29"],["dc.contributor.author","Wiegand, Bettina"],["dc.contributor.author","Dietzel, Martin"],["dc.contributor.author","Bielert, Ulrich"],["dc.contributor.author","Groth, Peter"],["dc.contributor.author","Hansen, Bent T."],["dc.date.accessioned","2018-11-07T08:46:19Z"],["dc.date.available","2018-11-07T08:46:19Z"],["dc.date.issued","2001"],["dc.description.abstract","Groundwater of the Quaternary unconsolidated sediments in the catchment area of the waterworks of Liebenau II (NW-Germany) is characterized by heterogeneous distributions of dissolved constituents, In order to determine sources of solutes and to estimate flowpaths, Sr isotope analyses were carried out on groundwater, precipitation, and soil samples. Sr-87/Sr-86 ratios of the groundwater samples vary between 0.708 and 0.719 and allow to discriminate four groundwater levels. The near-surface groundwater level is characterized by low Sr-87/Sr-86 ratios in the range of 0.7099 and 0.7130. At greater depths Sr-87/Sr-86 ratios increase up to a value of 0.7187 in the intermediate groundwater level. Deep groundwaters which can be divided into two levels exhibit a remarkable decrease of Sr-87/Sr-86 ratios. Groundwater of deep level I shows Sr isotope ratios between 0.7118 and 0.7128, whereas deep level II shows Sr-87/Sr-86 ratios of 0.7082 to 0.7087. Differences in the Sr-87/Sr-86 ratios are the result of varying sources of dissolved strontium in the groundwater. These encompass mineral weathering, precipitation, and anthropogenic inputs. Low Sr-87/Sr-86 ratios of 0.710 to 0.713 indicate the influence of precipitation and probably fertilizers on the near-surface groundwaters. At greater depths, groundwater chemistry is dominated by weathering processes. Due to significant differences in the Sr-87/Sr-86 ratios the dissolution of silicate minerals can be distinguished from the dissolution of carbonate minerals. For the intermediate groundwater level a dominant influence of silicate weathering is confirmed by radiogenic Sr-87/Sr-86 ratios between 0.713 and 0.719 and saturation indices < -3.5 for calcite. In contrast, low Sr-87/Sr-86 ratios of 0.708 to 0.709 indicate dissolution of carbonate minerals in the deep groundwater, where saturation for calcite is observed. A schematic diagram of groundwater flowpaths basing on the analyzed Sr-87/Sr-86 ratios, and geochemical parameter is displayed. The main aquifer is represented by gravel-bearing sands which form the base of the Quaternary deposits. A good agreement in the chemical and isotopic composition of groundwater from wells EB9, EB7 and groundwater of the deep level I indicates the dominance of groundwater pumping from depths of 20 to 35 meters. Deep groundwater levels are partially separated from the near-surface groundwater by intercalations of silt and clay lenses in the intermediate aquifer. These intercalations are characterized by a reduced permeability and longer residence time of groundwater. Vertical transport of solutes is partially reduced. This is confirmed by the larger variation of Sr-87/Sr-86 ratios in vertical direction compared to the rather constant isotope ratios in horizontal flow direction."],["dc.description.abstract","Grundwässer aus den quartären Lockersedimenten im Einzugsgebiet des Wasserwerkes Liebenau II (NW‐Deutschland) sind durch heterogene Verteilungen der gelösten Inhaltsstoffe charakterisiert. Zur Bestimmung der Herkunft der Lösungskomponenten und zur Ermittlung von Grundwasserfließwegen wurden Sr‐Isotopenuntersuchungen an Grundwässern, Niederschlagswässern und Sedimentproben durchgeführt. Die 87Sr/86Sr‐Verhältnisse der Grundwässer liegen im Bereich von 0.708 bis 0.719 und ermöglichen eine Unterscheidung von vier Grundwasserhorizonten. Unterschiede in den 87Sr/86Sr‐Verhältnissen resultieren aus verschiedenen Quellen des gelösten Strontiums im Grundwasser. Diese sind geprägt durch die Mineralverwitterung, die Niederschläge und anthropogene Einträge. Für den oberflächennahen Grundwasserbereich sind Einflüsse aus den Niederschlägen und vermutlich aus der landwirtschaftlichen Düngung durch niedrige 87Sr/86Sr‐Verhältnisse zwischen 0.710 und 0.713 indiziert. Mit zunehmender Tiefe dominieren Verwitterungsprozesse die Grundwasserchemie. Über das 87Sr/86Sr‐Verhältnis kann zwischen Silikat‐ und Karbonatauflösung unterschieden werden. Im mittleren Grundwasserhorizont bestätigen hohe 87Sr/86Sr‐Verhältnisse zwischen 0.713 und 0.719 und Sättigungsindices < –3.5 für Calcit den Einfluss verwitternder Silikate. Niedrige 87Sr/86Sr‐Verhältnisse von 0.708 bis 0.709 bei gleichzeitig hohem Sättigungsgrad für Calcit sind auf die Auflösung von Karbonatmineralen in den tiefen Grundwässern zurückzuführen."],["dc.identifier.doi","10.1002/1521-401X(200109)29:2/3<139::AID-AHEH139>3.0.CO;2-Z"],["dc.identifier.isi","000171273000008"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/20663"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","Najko"],["dc.relation.issn","0323-4320"],["dc.title","Sr-87/Sr-86 ratios as a tracer for geochemical processes in an unconsolidated sediment aquifer (Liebenau, NW-Germany)"],["dc.title.alternative","87Sr/86Sr‐Verhältnisse als Tracer für geochemische Prozesse in einem Lockergesteinsaquifer (Liebenau, NW‐Deutschland)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","29"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Grundwasser"],["dc.bibliographiccitation.lastpage","41"],["dc.bibliographiccitation.volume","21"],["dc.contributor.author","Brehme, Maren"],["dc.contributor.author","Deon, Fiorenza"],["dc.contributor.author","Haase, Christoph"],["dc.contributor.author","Wiegand, Bettina A."],["dc.contributor.author","Kamah, Yustin"],["dc.contributor.author","Sauter, Martin"],["dc.contributor.author","Regenspurg, Simona"],["dc.date.accessioned","2018-11-07T10:17:32Z"],["dc.date.available","2018-11-07T10:17:32Z"],["dc.date.issued","2016"],["dc.description.abstract","Rock and fluid geochemical data from Lahendong, Indonesia, were analyzed to evaluate the influence of fault zones on reservoir properties. It was found that these properties depend on fault-permeability controlled fluid flow. Results from measurements of spring and well water as well as rocks and their hydraulic properties were combined with hydrochemical numerical modeling. The models show that the geothermal field consists of two geochemically distinct reservoir sections. One section is characterized by acidic water, considerable gas discharge and high geothermal-power productivity-all related to increased fault zone permeability. The other section is characterized by neutral water and lower productivity. Increased fluid flow in the highly fractured and permeable areas enhances chemical reaction rates. This results in strong alteration of their surrounding rocks. Numerical models of reactions between water and rock at Lahendong indicate the main alteration products are clay minerals. A geochemical conceptual model illustrates the relation between geochemistry and permeability and their distribution within the area. Our conceptual model illustrates the relation between geochemistry and fault-zone permeability within the Lahendong area. Further mapping of fault-related permeability would support sustainable energy exploitation by avoiding low-productive wells or the production of highly corroding waters, both there and elsewhere in the world."],["dc.description.sponsorship","International Centre for Geothermal Research"],["dc.identifier.doi","10.1007/s00767-015-0313-9"],["dc.identifier.isi","000372554800005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/41245"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.publisher.place","Heidelberg"],["dc.relation.issn","1432-1165"],["dc.relation.issn","1430-483X"],["dc.title","Fault controlled geochemical properties in Lahendong geothermal reservoir Indonesia"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","110"],["dc.bibliographiccitation.journal","Journal of Hydrology"],["dc.bibliographiccitation.lastpage","117"],["dc.bibliographiccitation.volume","488"],["dc.contributor.author","Wiegand, Bettina A."],["dc.contributor.author","Schwendenmann, Luitgard"],["dc.date.accessioned","2018-11-07T09:25:52Z"],["dc.date.available","2018-11-07T09:25:52Z"],["dc.date.issued","2013"],["dc.description.abstract","A comparative study of Sr and Ca isotopes was conducted to assess solute sources and effects of biogeochemical processes on surface water and groundwater in four small tropical catchments located at La Selva Biological Station, Costa Rica. Variable concentrations of dissolved Sr2+ and Ca2+ in the catchments are related to mixing of waters from different origin. Three catchments are influenced by high-solute bedrock groundwater, while another catchment is primarily supplied by local recharge. Sr-87/Sr-86 ratios were employed to discriminate contributions from mineral weathering and atmospheric sources. Solutes in bedrock groundwater have a predominant geogenic origin, whereas local recharge is characterized by low-solute inputs from rainwater and minor in situ weathering releases from nutrient-depleted soils. Bedrock groundwater contributes more than 60% of dissolved Sr2+ to surface discharge in the Salto, Saltito, and Arboleda catchments, whereas the Taconazo catchment receives more than 95% of dissolved Sr2+ from rainwater. delta Ca-44/46 values of dissolved Ca2+ vary greatly in the catchments, mainly as a result of heterogeneous Ca isotope compositions of the contributing sources. Based on differences in delta Ca-44/40 values, two distinct bedrock groundwaters discharging at the Salto and the Arboleda catchments are suggested. Effects of biological processes in the plant-soil system on solute generation in the catchments are indicated by variable Ca/Sr ratios. However, these effects cannot clearly be assessed by Ca isotopes due to the strong heterogeneity of delta Ca-44/40 values of Ca2+ sources and high Ca2+ concentrations in bedrock groundwater. (C) 2013 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.jhydrol.2013.02.044"],["dc.identifier.isi","000318325000009"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/30162"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","0022-1694"],["dc.title","Determination of Sr and Ca sources in small tropical catchments (La Selva, Costa Rica) - A comparison of Sr and Ca isotopes"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","347"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Journal of the Geological Society"],["dc.bibliographiccitation.lastpage","360"],["dc.bibliographiccitation.volume","167"],["dc.contributor.author","Janousek, Vojtech"],["dc.contributor.author","Wiegand, Bettina A."],["dc.contributor.author","Zak, Jiri"],["dc.date.accessioned","2018-11-07T08:45:33Z"],["dc.date.available","2018-11-07T08:45:33Z"],["dc.date.issued","2010"],["dc.description.abstract","The Variscan Central Bohemian Plutonic Complex crops out between the upper-crustal Tepla-Barrandian and the high-grade Moldanubian units (Bohemian Massif). Much of the complex is made up of calc-alkaline plutonic rocks: (1) the geochemically more primitive, Na-rich 354 +/- 4 Ma Sazava suite, which was emplaced syntectonically during regional shortening; (2) the younger, more evolved, potassic Blatna suite, which records both the shortening along its NW contact and the onset of normal shearing related to exhumation of the Moldanubian Unit to the SE. New ion microprobe U-Pb zircon ages for the high-K calc-alkaline Blatna suite pinpoint this major switch in the tectonic regime. Both Blatna and Kozarovice granodiorites (346 +/- 2 Ma and 347 +/- 2 Ma (2 sigma)) were generated by melting of heterogeneous crust and were emplaced contemporaneously to form the Blatna composite pluton. From age spectra preserved in inherited zircons and whole-rock Sr-Nd isotope signatures, the likely crustal sources for the magmas were immature greywackes rich in Neoproterozoic (615 +/- 10 Ma, Kozarovice) or Late Cambrian-Early Ordovician (492 +/- 4 Ma, Blatna) volcanogenic detritus. An additional important petrogenetic process was variable mixing with enriched mantle-derived monzonitic magmas, which may also have supplied the extra heat for crustal anatexis."],["dc.identifier.doi","10.1144/0016-76492009-008"],["dc.identifier.isi","000275721900011"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/20471"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Geological Soc Publ House"],["dc.relation.issn","0016-7649"],["dc.title","Dating the onset of Variscan crustal exhumation in the core of the Bohemian Massif: new U-Pb single zircon ages from the high-K calc-alkaline granodiorites of the Blatna suite, Central Bohemian Plutonic Complex"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","24"],["dc.bibliographiccitation.journal","International Journal of Greenhouse Gas Control"],["dc.bibliographiccitation.lastpage","43"],["dc.bibliographiccitation.volume","48"],["dc.contributor.author","Tatomir, Alexandru Bogdan"],["dc.contributor.author","Halisch, Matthias"],["dc.contributor.author","Duschl, Florian"],["dc.contributor.author","Peche, Aaron"],["dc.contributor.author","Wiegand, Bettina A."],["dc.contributor.author","Schaffer, Mario"],["dc.contributor.author","Licha, Tobias"],["dc.contributor.author","Niemi, Auli"],["dc.contributor.author","Bensabat, Jacob"],["dc.contributor.author","Sauter, Martin"],["dc.date.accessioned","2018-11-07T10:14:41Z"],["dc.date.available","2018-11-07T10:14:41Z"],["dc.date.issued","2016"],["dc.description.abstract","Heltez, Israel is the location for an onshore deep saline CO2 storage pilot site. The 'Heletz sandstone' is the building unit of the deep saline reservoir. Based on core samples of sandstone and caprock taken from the newly drilled injection (H18A) and monitoring wells (H18B), this article examines and reports the petrophysical properties of the Heletz Formation reservoir important for the short and long term trapping of CO2. A suite of laboratory and pore-scale CT-based modeling techniques are employed to determine the flow and transport parameters used by the continuum-scale numerical simulators and the mineral composition necessary for the understanding of mineral trapping processes. The effect of diagenesis on the reservoir parameters was determined in the laboratory using sedimentological, petrological, and petrophysical analyses. Variations in Sr-87/Sr-86 isotope composition and fluid inclusion analysis bring additional information about the diagenetic development and define the status quo of fluid-mineral reactions before CO2 injection. Cathodoluminescence microscopy and SEM/XRD revealed the amounts of minerals in the sandstone samples and caprock and explained the poor binding of the sandstone which may lead to mobilized material during injection. Digital image analysis on thin sections, cathodoluminescence, and SEM were integrated with attributes derived from mercury intrusion porosimetry, steady state gas permeametry or nuclear magnetic resonance to form an essential outline for the Heletz Formation reservoir. This relates storage space, injectivity and storage efficiency to features such as grain size, pore size distribution, effective porosity, intrinsic permeability, or tortuosity. Furthermore, the laboratory and numerical CT-based investigation techniques are compared and discussed. The benefit of combining experimental methods and numerical simulations on pore-scale models is the increase in confidence of the parameter accuracy, fundamental for the success of the planned activities at Heletz. (C) 2016 Elsevier Ltd. All rights reserved."],["dc.description.sponsorship","European Community [227286, 282900, 309067]"],["dc.identifier.doi","10.1016/j.ijggc.2016.01.030"],["dc.identifier.isi","000378004200003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/40663"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1878-0148"],["dc.relation.issn","1750-5836"],["dc.relation.orgunit","Abteilung Strukturgeologie und Geodynamik"],["dc.title","An integrated core-based analysis for the characterization of flow, transport and mineralogical parameters of the Heletz pilot CO2 storage site reservoir"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]