Fluid inclusion study of the borehole Nagyatád K-1, 11 gneiss, SW Transdanubia (Hungary)
Fluid inclusions in synkinematic quartz lenses, segregations and those in the matrix quartz were studied from the 11-th core of the Nagyatád-K-1 borehole. This one is bored in the Somogy— Dráva Basin, SW-Hungary. It explored a polymetamorphic staurolite-kyanite-garnet gneiss mass. The studied fluid...
Elmentve itt :
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| Dokumentumtípus: | Cikk |
| Megjelent: |
University of Szeged, Department of Mineralogy, Geochemistry and Petrology
Szeged
1989
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| Sorozat: | Acta mineralogica-petrographica
30 |
| Kulcsszavak: | Kőzettan, Ásványtan, Földtan, Geokémia |
| Tárgyszavak: | |
| Online Access: | http://acta.bibl.u-szeged.hu/24774 |
| Tartalmi kivonat: | Fluid inclusions in synkinematic quartz lenses, segregations and those in the matrix quartz were studied from the 11-th core of the Nagyatád-K-1 borehole. This one is bored in the Somogy— Dráva Basin, SW-Hungary. It explored a polymetamorphic staurolite-kyanite-garnet gneiss mass. The studied fluid inclusions can be divided into three groups according to their compositoin: (1) HaO+1.7—14.3 NaCl equivalent weight % salt, (2) C0 2 +/-CH, and/or N2 [XCH4 . N !S0.1], (3) mixed CH4—N„—COa. The peak P—T conditions of two metamorphic phases were inferred from geothermobarometric data of ARKAI [1984] and the obtained fluid'inclusion data. The inferred P—T conditions of the first metamorphic phase were about 890—900 MPa and 550 °C. The fluid, existed at these P—T conditions, was a C02 rich one. The maximum pressure and temperature, reached during the second stage of metamorphism was determined by the method of intersecting isochores of two immiscible fluids, trapped simultaneously. On the basis of this method the obtained pressure was 240—260 MPa and the temperature about 540 °C. All the three compositional types were present during the second metamorphic event. The third metamorphic stage was a very low-low grade one with a simple, dilute aqueous solution. |
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| Terjedelem/Fizikai jellemzők: | 115-126 |
| ISSN: | 0365-8066 |