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  • 1
    Online-Ressource
    Online-Ressource
    Cham :Springer International Publishing AG,
    Schlagwort(e): Thermodynamics. ; Electronic books.
    Materialart: Online-Ressource
    Seiten: 1 online resource (426 pages)
    Ausgabe: 1st ed.
    ISBN: 9783030543181
    Serie: Springer Geochemistry Series
    DDC: 551.23
    Sprache: Englisch
    Anmerkung: Intro -- Preface -- Reference -- Contents -- About the Authors -- 1 Introduction -- References -- 2 Thermodynamics, Geochemical Modeling and Related Considerations -- 2.1 A Synthesis of Thermodynamics for Geothermal Geochemistry -- 2.1.1 Gibbs Free Energy, Enthalpy, and Entropy -- 2.1.2 Standard State, Activity and Fugacity -- 2.1.3 The Equilibrium Constant -- 2.1.4 Thermodynamic Properties of Solids and Gases as a Function of T and P -- 2.1.5 Thermodynamic Properties of Aqueous Species as a Function of T and P -- 2.2 Supcrt92 -- 2.2.1 The Equilibrium Constant of the Dissolution Reaction of a Solid Solution -- 2.3 Geochemical Modeling -- 2.3.1 Equilibrium State Models -- 2.3.2 Multicomponent Chemical Geothermometry: A Reaction Path Model of Special Interest -- 2.3.3 Activity Coefficients in Relatively Dilute Solutions -- 2.3.4 Activity Coefficients in Concentrated Solutions -- References -- 3 The Reservoir Liquids -- 3.1 Calculation of the Chemical Composition of Reservoir Liquids -- 3.1.1 Calculation of Reservoir Liquid Chemistry for Liquid Enthalpy Wells -- 3.1.2 Calculation of Reservoir Liquid Chemistry for Excess Enthalpy Wells -- 3.1.3 Further Details on the Reconstruction of Reservoir Liquid Chemistry -- 3.1.4 Presentation of the Main Results of Speciation-Saturation Calculations and Approach Adopted for the Chemical Classification of Reservoir Liquids -- 3.2 The Reservoir Liquids from the Geothermal Systems in Iceland -- 3.2.1 Chemistry of the Reservoir Liquids from the High-Temperature Geothermal Systems in Iceland -- 3.2.2 Chemistry of the Reservoir Liquids from the Medium-Temperature Geothermal Systems in Iceland -- 3.3 The Reservoir Liquids from the Geothermal Systems in Northern and Central America -- 3.3.1 Dixie Valley -- 3.3.2 Long Valley -- 3.3.3 Coso -- 3.3.4 Valles -- 3.3.5 Salton Sea, Heber, and Cerro Prieto -- 3.3.6 Los Azufres. , 3.3.7 Berlin -- 3.3.8 Miravalles -- 3.3.9 Chemistry of the Reservoir Liquids from the Geothermal Systems in Northern and Central America -- 3.4 The Reservoir Liquids from the Geothermal Systems in Japan -- 3.4.1 Mori-Nigorikawa -- 3.4.2 Sumikawa -- 3.4.3 Uenotai-Wasabizawa -- 3.4.4 Onikobe -- 3.4.5 Oku-Aizu -- 3.4.6 Takigami -- 3.4.7 Oguni -- 3.4.8 Fushime -- 3.4.9 Chemistry of the Reservoir Liquids from the Geothermal Systems in Japan -- 3.5 The Reservoir Liquids from the Geothermal Systems in the Philippines -- 3.5.1 Bacon-Manito -- 3.5.2 Tongonan-Mahanagdong -- 3.5.3 Alto Peak -- 3.5.4 Palinpinon -- 3.5.5 Chemistry of the Reservoir Liquids from the Geothermal Systems in the Philippines -- 3.6 The Reservoir Liquids from the Geothermal Systems in New Zealand -- 3.6.1 Broadlands-Ohaaki -- 3.6.2 Kawerau -- 3.6.3 Mokai -- 3.6.4 Ngatamariki -- 3.6.5 Ngawha -- 3.6.6 Orakeikorako -- 3.6.7 Rotokawa -- 3.6.8 Waiotapu -- 3.6.9 Wairakei -- 3.6.10 Chemistry of the Reservoir Liquids from the New Zealand Geothermal Systems -- 3.7 The Reservoir Liquids from Miscellaneous Geothermal Systems -- 3.7.1 Yangbajing -- 3.7.2 Kizildere -- 3.7.3 Bagnore -- 3.7.4 Latera -- 3.7.5 Mofete -- 3.7.6 Ribeira Grande -- 3.7.7 Asal -- 3.7.8 Tendaho -- 3.7.9 Aluto-Langano -- 3.7.10 Olkaria -- 3.7.11 Chemistry of the Reservoir Liquids from Miscellaneous Geothermal Systems -- 3.8 Main Results of Speciation Calculations for the Reservoir Liquids and Implications -- 3.8.1 The pH Value -- 3.8.2 The Fraction of Undissociated SiO2(aq) -- 3.8.3 The Fractions of Free Na+, K+, Ca2+, and Mg2+ Ions -- 3.8.4 The Activity Coefficient of Undissociated SiO2(aq) -- 3.8.5 The Activity Coefficients of Free Na+, K+, Ca2+, and Mg2+ Ions -- 3.9 Final Considerations on the Reservoir Liquids -- References -- 4 The Hydrothermal Minerals -- 4.1 The Hydrothermal Alteration Suites and Their Zones. , 4.2 Feldspars -- 4.2.1 Main Characteristics of Feldspars -- 4.2.2 The Chemistry of Hydrothermal Feldspars -- 4.2.3 The Structural State and Degree of Ordering of Hydrothermal Alkali Feldspars -- 4.2.4 The Thermodynamic Properties of Endmember Alkali Feldspars -- 4.2.5 The Thermodynamic Properties of Variably Ordered Alkali Feldspars -- 4.3 White Micas -- 4.3.1 Main Characteristics of White Micas -- 4.3.2 The Activities of Muscovite, Celadonites, and Pyrophyllite in Hydrothermal White Micas -- 4.3.3 The Thermodynamic Properties of Muscovite -- 4.4 Chlorites -- 4.4.1 Main Characteristics of Chlorites -- 4.4.2 Crystal Chemistry of Hydrothermal and Diagenetic Chlorites -- 4.4.3 The Activities of Clinochlore and Chamosite in Hydrothermal and Diagenetic Chlorites -- 4.4.4 The Thermodynamic Properties of Chlorites -- 4.5 Epidotes -- 4.5.1 Main Characteristics and Nomenclature of the Minerals of the Epidote Group -- 4.5.2 The Crystal Chemistry of Epidote Solid Solutions -- 4.5.3 The Activities of Clinozoisite and Epidote Endmembers in Hydrothermal Epidote Solid Solutions -- 4.5.4 The Thermodynamic Properties of Epidotes -- 4.6 Prehnite -- 4.6.1 The Crystal Chemistry of Prehnite/Ferri-Prehnite Solid Solutions -- 4.6.2 The Endmember Activities in Hydrothermal Prehnite/Ferri-Prehnite Solid Solutions -- 4.6.3 The Thermodynamic Properties of Prehnite -- 4.7 Laumontite and Wairakite -- 4.7.1 Main Characteristics of Ca-Zeolites -- 4.7.2 Crystal Chemistry of Wairakite and Analcime -- 4.7.3 Crystal Chemistry of Laumontite -- 4.7.4 The Activity of Wairakite in Hydrothermal Wairakite/Analcime Solid Solutions -- 4.7.5 The Activity of Laumontite in Hydrothermal Laumontite/Alkali-Laumontite Solid Solutions -- 4.7.6 The Thermodynamic Properties of Wairakite and Laumontite -- 4.8 Garnets -- 4.8.1 Crystal Chemistry of Garnets. , 4.8.2 The Composition of Hydrothermal Garnet Solid Solutions -- 4.8.3 The Activity of Grossular and Andradite in the Hydrothermal Garnet Solid Solutions -- 4.8.4 The Thermodynamic Properties of Grossular and Andradite -- 4.9 Calcite -- 4.9.1 The Composition of Calcite-Rich Trigonal Carbonates from Active Geothermal Systems -- 4.9.2 The Carbonate Minerals Other Than Calcite from Active Geothermal Systems -- 4.9.3 The Thermodynamic Properties of Calcite -- 4.10 Quartz and Other Silica Minerals -- 4.10.1 The Activity of Endmember Quartz in Hydrothermal Quartz -- 4.10.2 The Thermodynamic Properties of the Quartz/Chalcedony Mechanical Mixture -- 4.11 Conclusive Considerations on Hydrothermal Minerals -- References -- 5 Traditional Water Geothermometers and fCO2 -Indicators -- 5.1 General Aspects of Geothermometers and fCO2 -Indicators -- 5.1.1 Basic Hypotheses of Geothermometry -- 5.1.2 Historical Overview -- 5.1.3 The Simple Form of Most Geothermometric Equations -- 5.2 The Silica Geothermometers -- 5.2.1 Constant-Enthalpy Relations Expressing the Solubility of Silica Minerals in Pure Water -- 5.2.2 Variable-Enthalpy Relations Expressing Quartz Solubility in Pure Water -- 5.2.3 Quartz Solubility in Salt Solutions -- 5.2.4 The Preferred Silica Geothermometers -- 5.2.5 The Silica Versus Enthalpy Plot -- 5.2.6 The Silica Mixing Model -- 5.2.7 The Silica Boiling Model -- 5.2.8 Silica Geothermometry for Wells with Excess Enthalpy (Excess Steam) Discharges -- 5.2.9 Relation Between Undissociated SiO2 and Aquifer Temperature for the Selected Reservoir Liquids -- 5.3 The Na-K Geothermometers -- 5.3.1 The Na-K Geothermometric Functions Proposed by Different Authors -- 5.3.2 Why so Many Empirical Na-K Geothermometers Were Derived in Previous Studies? -- 5.3.3 The Hydrothermal Minerals Controlling the Na-K Geothermometers. , 5.3.4 Conclusive Remarks on the Na-K Geothermometers -- 5.4 The Na-K-Ca Geothermometer -- 5.4.1 Formulation, Controlling Reactions, and Limitations/Problems of the Na-K-Ca Geothermometer -- 5.4.2 Performance of the Na-K-Ca Geothermometer for the Selected Reservoir Liquids -- 5.4.3 Na-Ca and K-Ca Geothermometers -- 5.4.4 The Hydrothermal Minerals Controlling the Na-Ca and K-Ca Geothermometers -- 5.4.5 Conclusive Remarks on the Na-K-Ca Geothermometer -- 5.5 The K-Ca fCO2 -Indicator -- 5.5.1 Relevant Reactions, Derivation, and Limitations of the K-Ca fCO2 -Indicator -- 5.5.2 Application of the K-Ca fCO2 -Indicator to the Selected Reservoir Liquids -- 5.6 The K-Mg and Na-Mg Geothermometers -- 5.6.1 Relevant Reactions, Derivation, and Limitations of the K-Mg and Na-Mg Geothermometers -- 5.6.2 Application of the K-Mg and Na-Mg Geothermometers to the Selected Reservoir Liquids -- 5.6.3 The Na-K-Mg0.5 Triangular Diagram -- 5.7 Other Ionic Solute Geothermometers -- 5.7.1 The Li-Based Geothermometers -- 5.7.2 The "Auxiliary Geothermometers" of Michard (1990) -- 5.7.3 The Ca-Mg and SO4-F Theoretical Geothermometers for Thermal Waters from Carbonate-Evaporite Reservoirs -- 5.8 The Influence of Ion Complexing on Geothermometers and fCO2 -Indicators -- 5.8.1 Theoretical Approach -- 5.8.2 Complexing in Hydrothermal Aqueous Solutions and Related Effects -- 5.8.3 The Theoretical Geoindicators of Chiodini et al. (1991) -- 5.8.4 The Lesson Learned and the Way Forward -- References -- 6 The Activity-Based Theoretical Na-K Geoindicators -- 6.1 The Log K of the Na-K Exchange Reactions Between Hydrothermal Alkali Feldspars -- 6.2 The Na+/K+ Log Activity Ratio of the Selected Reservoir Liquids -- 6.3 The Ordering Parameter Z of Hydrothermal Adularia in Hypothetical Equilibrium with the Selected Reservoir Liquids. , 6.4 The Theoretical Activity-Based Na-K Geothermometers Involving the Ordering Parameter of Adularia.
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  • 2
    Online-Ressource
    Online-Ressource
    Cham : Springer International Publishing | Cham : Imprint: Springer
    Schlagwort(e): Geochemistry. ; Earth sciences. ; Thermodynamics. ; Geothermische Energie ; Hydrogeochemie ; Geochemische Prospektion ; Hydrochemie ; Thermodynamik ; Hydrothermalgebiet ; Fluid-Fels-System ; Modellierung ; Geochemie ; Hydrothermale Lösung ; Mineralbildung ; Hydrothermalsynthese ; Geothermometrie ; Mineralchemie ; Löslichkeit ; Lösung ; Geothermik ; Geothermische Energie ; Kohlendioxid ; Vulkanismus ; Thermalquelle ; Thermalwasser
    Beschreibung / Inhaltsverzeichnis: Introduction -- Thermodynamics, geochemical modeling and related considerations -- The selected reservoir liquids -- The hydrothermal minerals -- The traditional water geothermometers and fCO2-indicators -- The activity-based theoretical Na-K geoindicators -- The activity-based theoretical K-Mg and Na-Mg geoindicators -- The activity-based theoretical K-Ca and Na-Ca geoindicators -- Conclusions and way forwards -- References.
    Materialart: Online-Ressource
    Seiten: 1 Online-Ressource(XV, 415 p. 168 illus., 160 illus. in color.)
    Ausgabe: 1st ed. 2020.
    ISBN: 9783030543181
    Serie: Springer Geochemistry
    Sprache: Englisch
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  • 3
    ISSN: 1432-0819
    Schlagwort(e): Key words Fumaroles ; Fluid chemistry ; δD value ; δ18O value ; Volcanic surveillance ; Vulcano Island
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie
    Notizen: Abstract  Variations in δD and δ18O values with H2O contents and outlet temperatures indicate that the fumaroles of La Fossa crater have discharged mixtures of magmatic water and marine hydrothermal water, since 1979. The contribution of meteoric water was low in the period 1979–1982 and very low afterwards. The δ18O values of the marine-hydrothermal component of +5 to +7.2ö are due to isotopic exchange with the 18O-rich silicates of the rocks under high-temperature and low-permeability conditions. The δ18O value of the magmatic end-member is generally +3.5 to +4.3ö, although values as high as +5.5 to +6.5ö were reached in the summer of 1988, when magma degassing appears to have extended into the core of the magma body. The δD values of the end-member were close to –20ö, typical of andesitic waters. Both the isotopic values and chemical data strongly support a 'dry' model, consisting of a central magmatic gas column and a surrounding hydrothermal envelope, in which marine hydrothermal brines move along limited fracture zones to undergo total evaporation on approaching the conduits of magmatic fluids.The vents at the eastern and western boundaries of the fumarolic field are fed by fluids whose pressure is governed by the coexistence of vapor, liquid and halite, giving rise to a high risk of phreato magmatic explosions, should magma penetrate into these wet environments. Most La Fossa eruptions were triggered by an initial hydrothermal blast and continued with a series of phreatomagmatic explosions.The fluids discharged by the Forgia Vecchia fumaroles are mixed with meteoric water, which is largely evaporated, although subordinate loss of condensed steam may be responsible for scrubbing most of the acidic gas species. The temperatures and pressures, and the risk of a sudden pressure increase, are low.A boiling hydrothermal aquifer at 230°  C is present underneath the Baia di Levante beach. This area has a minor risk of hydrothermal explosions.
    Materialart: Digitale Medien
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  • 4
    ISSN: 1432-0819
    Schlagwort(e): Key words Sulfur isotopes ; Magma degassing ; Somma-Vesuvius volcanic complex
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie
    Notizen: Abstract Sulfur contents and δ34S values of Somma-Vesuvius magmas are consistent with syneruptive, open-system degassing at temperatures of 800–850°C for Plinian pumices and 1100–1200°C for lavas. The extent of degassing appears to be greater in lavas than in pumices. The key parameter controlling the 34S/32S ratio of Somma-Vesuvius volcanics is the average magma oxidation state, which generally varies from 0.85 to 1.20 Δ NNO units for lavas and from 1.20 to 1.40 Δ NNO units for pumices. Consequently, S contents and δ34S values of magmas constitute a potentially valuable tool in estimating their average redox conditions. The results of this study may help in risk mitigation when the Vesuvius magmatic system evolves toward eruptive conditions.
    Materialart: Digitale Medien
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  • 5
    ISSN: 1432-086X
    Schlagwort(e): Liver ; interventional procedure ; Liver neoplasms, therapy ; Computed tomography ; Magnetic resonance imaging
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Purpose The aim of this study was to evaluate the effectiveness of transcatheter arterial embolization (TAE) followed by percutaneous ethanol injection (PEI) in the treatment of large hepatocellular carcinoma (HCC) lesions. Methods Fifteen patients with HCC were treated by means of TAE followed by 6–16 ethanol injections. In 10 patients, the HCC was solitary (3–8 cm); 3 patients had 1, and 2 patients had 2 daughter nodules (3 cm or smaller) in addition. In 12 of 15 main tumors and in 4 of 7 daughter nodules, a tumor capsule was observed by computed tomography or magnetic resonance imaging. Results Combined treatment with TAE and PEI resulted in complete necrosis of 12 of 15 main tumors and 7 of 7 daughter nodules on biopsy. Treatment failure (incomplete necrosis) occurred in 3 unencapsulated main tumors. The 1-year survival rate in 10 patients was 100%. Conclusion The combination of TAE and PEI proved to be an effective treatment for large HCC, including those with 1–2 small daughter nodules. The presence of a tumor capsule significantly correlates (p 〈 0.05) with a favorable outcome of treatment.
    Materialart: Digitale Medien
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  • 6
    ISSN: 1432-1084
    Schlagwort(e): Fine needle biopsy ; Pancreatic carcinoma ; diagnosis ; Pancreas ; interventional procedures
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Percutaneous fine needle biopsy (FNB), under sonographic guidance, of local pancreatic lesions was studied by comparing the results of smear cytology (SC) with microhistology (MH) in 34 patients in whom both sampling procedures were carried out. MH suffered from a higher number of inadequate samples (retrieval rate: 94.1% SC, 85.3% MH), but reached a superior sensitivity rate as regard to the diagnosis of pancreatic malignancy (91.7% MH, 80.8% SC). Both samples obtained an absolute specificity rate (100%. A 96.3% sensitivity rate was obtained by combination of the two techniques in the absence of complications. Thus, the combined use of SC and MH in pancreatic fine needle biopsy was proven to be a safe and reliable procedure.
    Materialart: Digitale Medien
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  • 7
    ISSN: 1432-0819
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie
    Notizen: Abstract Three points raised in the paper by Tedesco and Sabroux (1987) are dealt with. (1) The inconsistency between the water partial pressure calculated by Tedesco and Sabroux (1987) and saturation pressure is due to the improper use of the water-gas-shift reaction as a geothermometer. In fact Tedesco and Sabroux (1987) do not take into account the distribution of gas species between the coexisting vapour and liquid phases. (2) The depth of the “steam reservoir” is evaluated by Tedesco and Sabroux (1987) in too simplistic a way. This matter should be treated with greater care owing to the high social impact of any consideration on the Phlegraean Fields system. (3) The reliability of carbon monoxide determination at the concentration level encountered at Solfatara depends on the collection method rather than on the gas-chromatographic technique.
    Materialart: Digitale Medien
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  • 8
    ISSN: 1432-086X
    Schlagwort(e): Key words: Images, virtual—Computed tomography, helical—Renal arteries—Arteries, abnormalities
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Purpose: To evaluate the diagnostic accuracy of virtual vascular endoscopy (VVE) in the detection of accessory renal arteries. Methods: We retrospectively reviewed the CT angiography data sets of 67 patients (29 male and 38 female; age range 17–72 years, mean age 53 years) imaged for the study of the renal arteries, and affected by renovascular hypertension. All patients also had intraarterial digital subtraction angiography (DSA). CT angiography data sets were processed to obtain maximum intensity projection (MIP) and surface-rendered VVE of the aorta. Axial images, MIP, and VVE were evaluated separately and in combination in the detection of accessory renal arteries. Their results in terms of sensitivity and specificity were then compared with DSA. Results: Axial images had a sensitivity of 88% and specificity of 94% for accessory renal artery detection, MIP had a sensitivity of 88% and specificity of 98%, and VVE had a sensitivity of 63% and a specificity of 88% (p 〈 0.05 vs DSA), but these increased to 88% and 98% respectively if endoscopic views were integrated with the other display techniques. Conclusion: VVE based on surface rendering does not add substantial benefits to CTY angiography; by contrast MIP is the most accurate display technique for the detection of accessory renal arteries.
    Materialart: Digitale Medien
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