Differentiation and crystallisation processes in A-type granites [Elektronische Ressource] : an experimental study of the Wangrah Suite, Australia = Differenzierungs- und Kristallisationsprozesse in A-Typ-Graniten / von Kevin Klimm

Differentiation and crystallisation processes in A-type granites: An experimental study of the Wangrah Suite, Australia. Differenzierungs- und Kristallisationsprozesse in A-Typ Graniten: Eine experimentelle Studie der Wangrah Suite, Australien. Vom Fachbereich Geowissenschaften und Geographie der Universität Hannover zur Erlangung des Grades DOKTOR DER NATURWISSENSCHAFTEN Dr. rer. nat. genehmigte Dissertation von Dipl. Min. Kevin Klimm geboren am 16.12.1973 in Kassel 2004 Referent: Prof. Dr. F. Holtz Korreferenten: Prof. Dr. W. Johannes Prof. Dr. P.L. King Tag der Promotion: 25. Mai 2004 Abstract Abstract This study provides information on differentiation and crystallisation processes based on experimentally determined phase relations of four natural A-type granitic compositions. Each composition is representative for one major granite intrusion of the Wangrah Suite, Lachlan Fold Belt, southeastern Australia. The intrusions are Danswell Creek, Wangrah, Eastwood and Dunskeig Granite (ordered from “most mafic” to “most felsic” by increasing silica contents). The chemical variations of these granites, such as decreases of FeO, MgO, CaO, Ba and Sr with increasing SiO reflect different 2stages of differentiation in the magmatic history of the Wangrah Suite.