Combined U-Pb dating and Sm-Nd studies on lower crustal and mantle xenoliths from the Delegate basaltic pipes, southeastern Australia
Article Abstract:
A study on granulite and pyroxenite xenoliths from the Delegate basaltic pipes in the Paleozoic Lachlan fold belt in southeastern Australia is given. An analysis of the Sm-Nd isotopes of the minerals and rocks and U-Pb zircon dating is used to carry out the experiments. Findings of the study will help clarify the evolution of geological processes within the crust and upper mantle in the region. Among these are the mafic growth into the lower crust and upper mantle and the development of granitoid melts.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1998
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Corundum from basaltic terrains: a mineral inclusion approach to the enigma
Article Abstract:
Mineral inclusions in the corundum grains show a different range of mineral phases, such as Nb-Ta oxides, Ca feldspars, zircons, Fe,Cu-sulphide and Ca,Th-phosphates, crystallized with corundum megacrysts. The unique chemical features of mineral inclusions indicate that granite/syenite pegmatite and bonatite components are involved in the formation of corundum megacrysts. This inclusion model give a new "hybrid rock hypothesis" for corundum megacrysts.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1996
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Models of corundum origin from alkali basaltic terrains: a reappraisal
Article Abstract:
A study was conducted to analyze blue-green-yellow zoned corundrums that support novel information based on 92 mineral inclusions. Corundrums from different regions were examined. An electron microprobe was used to perform major and minor element analyses. Results indicated that corundum can crystallize from volatile-rich saturated felsic ments produced and fractionated under mantle/lower crust environments.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1998
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