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Details van artikel 12 van 14 gevonden artikelen
| Titel: |
The nature and origin of eclogite blocks in serpentinite from the Tamworth Belt, New England Fold Belt, eastern Australia |
| Auteur: |
Allan, A. D. Leitch, E. C. |
| Verschenen in: |
Australian journal of earth sciences |
| Paginering: | Jaargang 39 (1992) nr. 1 pagina's 29-35 |
| Jaar: |
1992-02 |
| Inhoud: |
Small eclogite blocks occur in a serpentinite mass in the eastern part of the Tamworth Belt of the New England Fold Belt. Mineral compositions are similar to those of group C eclogite from Oregon and California, suggesting metamorphic pressures of 1-1.4 GPa. Core compositions of garnet and clinopyroxene suggest temperatures of ∼ 412°-422°C whereas rims indicate temperatures of ∼ 521°-532°C. The blocks, which are of a composition similar to ocean floor basalt, are either accidental blocks incorporated into the ultramafic body during emplacement from a forearc substrate or were produced by high pressure metamorphism of a basaltic intrusion carried to depth in the ultramafic rocks of a downgoing slab. In both interpretations, rise of the ultramafic rocks probably occurred during crustal extension at the start of the Permian. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 12 van 14 gevonden artikelen
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