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Details van artikel 6 van 18 gevonden artikelen
| Titel: |
Highly selective partial melting of pelitic gneiss at Cannington, Cloncurry district, Queensland |
| Auteur: |
Mark, G. Phillips, G. N. Pollard, P. J. |
| Verschenen in: |
Australian journal of earth sciences |
| Paginering: | Jaargang 45 (1998) nr. 1 pagina's 169-176 |
| Jaar: |
1998-02 |
| Inhoud: |
Up to 70% partial melting in some layers of pelitic gneiss at Cannington contrasts with an absence of melting in adjacent pelitic units. Mass-balance calculations suggest the melted and unmelted units were broadly similar in their initial composition, except for K2O, Al2O3 and SiO2. This difference is interpreted as reflecting more abundant muscovite and less quartz in the intervals that underwent extensive melting. Products of the partial melting are quartzo-feldspathic veins varying in thickness from a few millimetres to many centimetres. The thinner veinlets tend to be concordant to gneissic layering, whereas the thicker veins are more discordant. This highly selective melting may explain why melt products such as pegmatites might be broadly stratigraphically controlled in parts of some high-grade terrains. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 6 van 18 gevonden artikelen
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