Thermodynamik modeling of alkali-rich melt properties based on experimental and structural data
Thermodynamik modeling of alkali-rich melt properties based on experimental and structural data
批准号:
5386630
负责人:
Professor Dr. Francois Holtz, Ph.D.
金额:
$0.0万
依托单位:
依托单位国家:
德国
项目类别:
Research Grants
财政年份:
2002
资助国家:
德国
项目状态:
已结题
起止时间:
2001-12-31 至 2008-12-31
中文摘要
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英文摘要
Obwohl in den letzten Jahrzehnten zahlreiche experimentelle und spektroskopische Daten erarbeitet wurden, gibt es immer noch kein generelles Modell, das die Vorhersage von chemischen und physikalischen Eigenschaften wasserhaltiger Aluminosilikatschmelzen erlaubt. In dem vorgeschlagenen Projekt soll basierend auf dem Margules-Ansatz ein Modell entwickelt werden, das die Vorhersage von Phasenbeziehungen in dem System SiO2NaAlSiO4-KAlSiO4-H2O (Qz-Ne-Ks-H2O) ermöglicht. Dieses System beinhaltet eine Erweiterung des Granitsystems hin zu Alkalireichen Zusammensetzungen und ist insbesondere für das Verständnis von explosivem Vulkanismus von Bedeutung. Es ist geplant, alle verfügbaren Informationen über strukturelle, physikalische und chemische Eigenschaften der Schmelzen in das Modell zu integrieren (Viskosität, Phasenbeziehungen, Löslichkeit von Volatilen und Edelgasen). Zusätzlich für das SiO2-arme System Qz-Ne-Ks-H2O benötigte experimentelle Daten sollen in dem Projekt erarbeitet werden. Von der Entwicklung eines Modells über Phasenbeziehungen in Alkali-reichen Silikatschmelzen werden substantielle Verbesserungen für die Modellierung des Entgasungsverhaltens von phonolitischen und rhyolitischen Magmen erwartet. Das Projekt wird insbesondere von den komplementären Erfahrungen der beiden Arbeitsgruppen über thermodynamische Modellierung und experimentelle Geochemie profitieren.
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Storage conditions and degassing processes of low-K and high-Al tholeiitic island-arc magmas: Experimental constraints and natural observations for Mutnovsky volcano, Kamchatka
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Magma differentiation processes and pre-eruptive conditions of MORBs (7-11°S) near Ascension Island - Constraints from experiments and phase equilibria modeling
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Pre-eruptive conditions prior to and after magma mixing at Unzen volcano: constraints from high pressure experimental investigations
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依托单位:
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