Naslov
Compositional zoning in amphibole from amphibole bearing parageneses of west Psunj (Croatia): evidence for progressive metamorphism?

Autori
Balen, Dražen ; Bermanec, Vladimir ; Marci, Vera

Izvornik
Geologia Croatica : journal of the Institute of Geology Zagreb and the Croatian Geological Society (1330-030X) 50 (1997), 1; 7-15

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
amphibole; amphibolite; geothermometry; geobarometry; Psunj; Croatia

Sažetak
Amphibole bearing parageneses from the western part of Mt. Psunj (Croatia record evidence of prograding metamorphism. Optical and microprobe analyses, together with thermobarometrib evaluations on amphibole bearing parageneses, show a zonation with Si- and Mg-concentrations decreasing from the core to rim along with increasing Al-, Na-, and Ti-content. Changes in the chemical composition of amphibole grains are interpreted through coupled substitutions, and reactions with co-existing minerals during an increase in metamorphic conditions from greenschist to amphibolite facies. The change in P-T conditions recorded in the growth of amphibole grains (general prograding pattern) together with changes in the modal compositions in related parageneses could be interpreted in a model of a subduction zone.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA