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  • 2020-2024  (28)
  • 1945-1949  (6)
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  • 1
    Publication Date: 2023-06-22
    Description: The Central Andes of South America host the largest known lithium resources in a confined area, but the primary lithium sources of the salar deposits and the mobilisation process of lithium are still a matter of speculation. Chemical weathering at or near the surface and leaching in hydrothermal systems of the active magmatic arc are considered the two main mechanisms of Li extraction from the source rock. The lithium and strontium isotope composition of typical salar deposits offer insights into the processes on how Li brine deposits in Andean evaporites are formed. Data from the Salar de Pozuelos indicate near-surface chemical weathering in a cold and dry climate as the dominant mobilisation process of Li, with evaporation being responsible for the enrichment. The Cenozoic ignimbrites are the favoured source rock for the Li, with subordinate additions from the Palaeozoic basement. The identification of the source rocks is supported by radiogenic Nd and Pb and stable B isotope data from salar deposits. A comparison with other Li brine and salt deposits in the Altiplano-Puna Plateau and its western foothills places the Salar de Pozuelos as an endmember of Li solubilisation by chemical weathering with only minor hydrothermal mobilisation of Li.
    Description: Universität Bremen (1013)
    Keywords: ddc:553.6 ; Central Andes ; Salar deposits ; Lithium isotopes ; Lithium deposits
    Language: English
    Type: doc-type:article
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  • 2
    Publication Date: 1947-01-01
    Print ISSN: 0939-7922
    Electronic ISSN: 1431-5831
    Topics: Physics
    Published by Springer
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  • 3
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    In:  CASI
    Publication Date: 2019-08-13
    Description: It has recently Miss Gertrude Blanch that errors exist in been brought to the attention of the NACA by of the Bureau of Standards, Department of Commerce the tabulated values appearing in tables 11 to 17 of TM 1224. Miss Blanch notes that C. J. Bouwkamp~ from whom Meixner obtained the values presented, subsequently corrected them in tables. appearing in the Journal of Mathematics and Physics, vol. XXVI, no. 2, JULY 1947, pp. 88-91. In spite of the difference in symbols and notation in the two papers, reprints of tables I to IX included in the July 1947 issue of the Journal of Mathematics and Physics are attached for the use of those interested in receiving them. The NACA wishes to express its appreciation to the Journal of Mathematics and Physics for permitting these tables to be reproduced for this purpose.
    Keywords: Physics (General)
    Type: NACA-TM-1224 , ZWB Forschungsbericht Nr. 1752
    Format: application/pdf
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  • 4
    Publication Date: 2023-04-12
    Description: Methods
    Description: In die Datenbank aufgenommen, wurden jene Personen, die ab 1949 eine Professur in Geographie an einer deutschsprachigen Hochschule mit Promotionsrecht innehatten (nicht aufgenommen wurden: Assistenz-, Honorar-, Apl.-, Vertretungs- und Juniorprofessor:innen). Berücksichtigt wurden nicht nur Universitäten, sondern auch Pädagogische Hochschulen, sofern diese über Promotionsrecht verfügten. Für die Zusammenstellung der GEOprof-Database wurden ganz unterschiedliche Quellen herangezogen: Für die Erfassung der derzeitigen Hochschullehrer:innen konnte relativ problemlos auf deren Internetauftritte zurückgegriffen werden; je weiter wir jedoch in die Vergangenheit zurückgingen, desto vielfältiger wurden die Datenfundorte. Wichtige Quellen waren: Das Geographische Taschenbuch, Kürschners Deutscher Gelehrten-Kalender, der Personalia-Teil des Rundbriefs Geographie, das Mitgliederverzeichnis des VGDH, diverse Festschriften und Nachrufe, Zeitungsmeldungen, Webarchive und archivierte Vorlesungsverzeichnisse sowie schriftliche oder mündliche Auskünfte von UniversitätsarchivarInnen oder den Professor:innen selbst. Außerdem hat uns Heinz Peter Brogiato (IfL, Leipzig) dankenswerterweise die von ihm erstellte Liste ehemaliger Geographie-Professor:innen (bis 1960) zur Verfügung gestellt. Einen herzlichen Dank an alle, die uns unterstützt haben!
    Description: Other
    Description: Bei der GEOprof-Database, die seit 2018 am Lehrstuhl für Anthropogeographie der Universi-tät Passau entwickelt wird, handelt es sich um die erste vollständige Zusammenstellung der Professor:innenschaft der deutschsprachigen Geographie (Deutschland. Österreich, deutschsprachige Schweiz und Luxemburg (ab 2006). Die hier zur Verfügung gestellte GEOprof-Database ist für die historiographische Erforschung der deutschsprachigen Geographie von großem Wert; sie kann Basis und Ausgangspunkt für die Bearbeitung unterschiedlicher fachhistorischer und wissenschaftssoziologischer Untersu-chungen sein. In der Datenbank finden sich Informationen zur akademischen Biographie der gesamten Geographieprofessor:innenschaft inklusive der Forschungsschwerpunkte, der be-ruflichen Stationen seit dem ersten Ruf sowie der Denomination der jeweiligen Professur. Ab Herbst 2022 erfolgten eine umfassende Aktualisierung und Erweiterung der Datenbank (V.2.0). Neuenthalten sind nun auch Informationen über die Promotion der jeweiligen Professor:innen (Titel der Dissertation, Betreuer:innen sowie Ort und Jahr der Promotion).
    Description: Abstract
    Description: The GEOprof-Database was developed at the Chair of Human Geography at the Uni-versity of Passau between autumn 2018 and spring 2023. The development of the database was part of a research project funded by the German Research Council (DFG) (No. 249237273). The GEOprof-Database is the first complete compilation of the professorate of German-language geography (Germany. Austria, German-speaking Switzerland and Luxem-bourg). The database includes basic information on all full professors from 1949 to 2022. The GEOprof-Database is of great value for historiographical research of German-language geography. It can be the basis and starting point of different historical and sociological stud-ies of the discipline. The database contains information on the academic biography of the entire geography professorate. In 2022, a comprehensive update (V.2.0) and expansion was carried out. Newly included in the database are information about the professors’ doctoral disserta-tions (dissertation’s title, year, supervisors & name of university).
    Keywords: Historische Geographie ; Geographiegeschichte ; Wissenschaftsforschung ; Disziplinentwicklung ; Professorendatenbank ; Professorenschaft ; EARTH SCIENCE ; science 〉 geography
    Type: Dataset , Dataset
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  • 5
    Publication Date: 2023-03-14
    Keywords: Aluminium; CA1; CA10; CA2; CA3; CA4; CA5; CA6; CA7; CA8; CA9; Calcium; Central_Andes_CA1; Central_Andes_CA10; Central_Andes_CA2; Central_Andes_CA3; Central_Andes_CA4; Central_Andes_CA5; Central_Andes_CA6; Central_Andes_CA7; Central_Andes_CA8; Central_Andes_CA9; Central Andes; Comment; Event label; Laguna de Huasco; Lithium deposits; Lithium isotopes; Magnesium; MULT; Multiple investigations; pH; Potassium; Quebrada Chaco del Norte; Quebrada del Rio Negro, Banos Rio Negro; Salar de Atacama, Laguna Chaxa; Salar de la Isla; Salar de la Isla, Volcan Dos Crateros; Salar de las Parinas; Salar de Pedernales; Salar deposits; Salar Grande; Sodium; Strontium; Terma Chiriguaya
    Type: Dataset
    Format: text/tab-separated-values, 108 data points
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  • 6
    Publication Date: 2023-01-20
    Keywords: Boron; Central Andes; Comment; Event label; Lithium; Lithium deposits; Lithium isotopes; MULT; Multiple investigations; Salar deposits; Salar de Pozuelos, Argentina; SP-11-01; SP-11-02; SP-11-03; SP-11-04; SP-11-05; SP-11-06; SP-11-08; SP-11-10; SP-11-12; SP-11-14; SP-11-15; SP-11-16; SP-11-17; SP-11-18; SP-11-21; SP-11-22; SP-11-23; SP-11-27; SP-11-30; SP-11-32; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, standard deviation; δ11B; δ11B, standard deviation; δ7Li; δ7Li, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 186 data points
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  • 7
    Publication Date: 2023-01-20
    Description: The Central Andes of South America hosts the largest known lithium anomalies in a restricted area, but the primary lithium sources of the salar deposits and the mobilization process of lithium are still a matter of speculation. Chemical weathering at or near the surface and leaching in hydrothermal systems of the active magmatic arc are considered as the two main mechanisms of Li extraction from the source rock. The lithium and strontium isotope composition of typical salar deposits offer insights into the processes on how Li brine deposits in Andean evaporites are formed. Data from the Salar de Pozuelos indicate surface near chemical weathering in a cold and dry climate as the dominant mobilization process of Li, with evaporation being responsible for the enrichment. The Cenozoic ignimbrites are the favourite source rock for the Li, with subordinate additions from the Palaeozoic basement. The identification of the source rocks is supported by radiogenic Nd and Pb, and stable B isotope data from salar deposits. A comparison with other Li brine and salt deposits in the Altiplano-Puna Plateau and its western foothills places the Salar de Pozuelos as an endmember of Li solubilisation by surface near chemical weathering with only minor hydrothermal mobilization of Li.
    Keywords: Central Andes; Lithium deposits; Lithium isotopes; Salar deposits
    Type: Dataset
    Format: application/zip, 11 datasets
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  • 8
    Publication Date: 2023-01-20
    Keywords: Central Andes; Lithium; Lithium deposits; Lithium isotopes; MULT; Multiple investigations; Salar deposits; Salar de Pozuelos, Argentina; Sample code/label; SP-11-24; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, standard deviation; δ11B; δ11B, standard deviation; δ7Li; δ7Li, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 64 data points
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  • 9
    Publication Date: 2023-01-20
    Keywords: Boron; CA1; CA10; CA11; CA12; CA13; CA14; CA15; CA16; CA17; CA18; CA19; CA2; CA3; CA4; CA5; CA6; CA7; CA8; CA9; Central_Andes_CA1; Central_Andes_CA10; Central_Andes_CA11; Central_Andes_CA12; Central_Andes_CA13; Central_Andes_CA14; Central_Andes_CA15; Central_Andes_CA16; Central_Andes_CA17; Central_Andes_CA18; Central_Andes_CA19; Central_Andes_CA2; Central_Andes_CA3; Central_Andes_CA4; Central_Andes_CA5; Central_Andes_CA6; Central_Andes_CA7; Central_Andes_CA8; Central_Andes_CA9; Central Andes; Comment; Event label; Laguna de Huasco; Lithium; Lithium deposits; Lithium isotopes; MULT; Multiple investigations; Quebrada Chaco del Norte; Quebrada del Rio Negro, Banos Rio Negro; Salar de Antofalla; Salar de Atacama; Salar de Atacama, Laguna Chaxa; Salar de la Isla; Salar de la Isla, Volcan Dos Crateros; Salar de las Parinas; Salar de Pedernales; Salar de Piedra Parada; Salar deposits; Salar de Uyuni, Cerro Tunupa; Salar de Uyuni, Ojos del Salar; Salar Grande; Salt pond ignimbrite field; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, standard deviation; Terma Chiriguaya; δ11B; δ11B, standard deviation; δ7Li; δ7Li, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 195 data points
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  • 10
    Publication Date: 2023-01-20
    Keywords: Central Andes; Event label; Lithium deposits; Lithium isotopes; MULT; Multiple investigations; Salar deposits; Salar de Pozuelos, Argentina; SP-11-01; SP-11-05; SP-11-08; SP-11-10; SP-11-12; SP-11-14; SP-11-15; SP-11-16; SP-11-18; SP-11-21; SP-11-23; SP-11-27; SP-11-30; δ18O, water; δ18O, water, standard deviation; δ Deuterium; δ Deuterium, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 52 data points
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