The retrograde evolution of a dolomite-bearing hydrous peridotite from the Ulten Zone (Italian Alps)

GeoActa

Volumn 6, Issue , 2007, Pages 37-45

  Braga, Roberto ^a   Sapienza, Giovanna T ^a  

^a UNIVERSITY OF BOLOGNA   (Italy)

Author keywords

Average PT method; Dolomite bearing peridotite; Multi equilibrium thermobarometry; Ulten Zone

Indexed keywords

DOLOMITE; MINERALOGY; P-T CONDITIONS; PERIDOTITE; RETROGRADE METAMORPHISM; TEXTURE;

ALPS; EASTERN ALPS; EURASIA; EUROPE;

EID: 44249125067     PISSN: 17218039     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (20)

1. BREY G.P. and KOHLER T.P., 1990. Geothermometry in Four-phase lherzolites II: new thermobarometers, and practical assessment of of existing thermobaromoters. Journal of Petrology, 31, 1353-1378.
2. FUMAGALLI P. and POLI S., 2005. Experimentally determined phase relations in hydrous peridotites to 6.5 GPa and their consequences on the dynamics of subduction zones. Journal of Petrology, 46, 555-578.
3. GODARD G., MARTIN S., PROSSER G., KIENAST J.-R. and MORTEN L. , 1996. Variscan migmatites, eclogites and garnet-peridotites of the Ulten zone, Eastern Austroalpine system. Tectonophysics, 259, 313-341.
4. HOLLAND T.J.B. and POWELL R., 1998. An internally consistent thermodynamic data set for phases of petrological interest. Journal of Metamorphic Geology, 16, 309-343.
5. KRETZ R., 1983. Symbols for rock-forming minerals. American Mineralogist, 68, 277-279.
6. MAROCCHI M., HERMANN J. and MORTEN L., 2007. Evidence for multi-stage metasomatism of chlorite-amphibole peridotites (Ulten Zone, Italy): constraints from trace element compositions of hydrous phases. Lithos, 99, 85-104.
7. MORTEN L., BARGOSSI G.M. and LANDINI BARGOSSI F., 1976. Notizie preliminari sulle metamorfiti della Val di Rumo, Val di Non, Trento. Mineralogica et Petrographica Acta, 21, 137-144.
8. MORTEN L., NIMIS P. and RAMPONE E., 2004. Records of mantle-crust exchange processes during continental subduction-exhumation in the Nonsberg-Ultental garnet peridotites (eastern Alps). A review. Periodico di Mineralogia, 73, 119-129.
9. MÜLLER W., PROSSER G., MANCKTELOW N., VILLA I.M., KELLEY S.P., VIOLA G. and OBERLI F., 2001. Geochronological constraints on the evolution of the Periadriatic Fault System (Alps). International Journal of Earth Sciences, 90, 623-653.
10. NIMIS P. and MORTEN L., 2000. P-T evolution of 'crustal' garnet peridotites and included pyroxenites from Nonsberg area (Upper Austroalpine), NE Italy: from the wedge to the slab. Journal of Geodynamics, 30, 93-115.
11. OBATA M. and MORTEN L., 1987. Transformation of spinel lherzolite to garnet lherzolite in ultramafic lenses of the Austridic crystalline complex, Northern Italy. Journal of Petrology, 28, 599-623.
12. O'NEILL H., 1981. The transition between spinel lherzolite and garnet therzolite, and its use as a geobarometer. Contributions to Mineralogy and Petrology, 77,
13. PETRINI R. and MORTEN L., 1993. Nd-isotopic evidence of enriched lithospheric domains: an example from the Nonsberg area, eastern Alps. Terra Abstract supplement to Terra Nova, 4, 19-20.
14. POWELL R. and HOLLAND T.J.B., 1994. Optimal geothermometry and geobarometry. American Mineralogist, 79, 120-133.
15. RAMPONE E. and MORTEN L., 2001. Records of crustal metasomatism in the garnet peridotites of the Ulten zone (Upper Austroalpine, Eastern Alps). Journal of Petrology, 42, 207-219.
16. RANALLI G., MARTIN S. and MAHATSENTE R., 2005. Continental subduction and exhumation: an example from the Ulten Unit, Tonale Nappe, Eastern Austroalpine. In: Gapais D., Brun J.P. and Cobbold P.R. (eds) Deformation Mechanisms, Rheology and Tectonics: from Minerals to the Lithosphere. Geological Society, London, Special Publications, 243, 159-174.
17. SCAMBELLURI M., HERMANN J., MORTEN L. and RAMPONE E., 2006. Melt- versus fluid-induced metasomatism in spineol to garnet wedge peridotites (Ulten Zone, Eastern Italian Alps): clues from trace element and Li abundances. Contributions to Mineralogy and Petrology, 151, 372-394.
18. TAYLOR W.R., 1998. An experimental test of some geotermometer and geobarometer formulations for upper mantle peridotites with application to the thermobarometry of fertile peridotite and garnet websterite. Neues Jahrbuch für Mineralogie Abhandlungen, 172, 381-408.
19. TUMIATI S., THONI M., NIMIS P., MARTIN S. and MAIR V., 2003. Mantle-crust interactions during Variscan subduction in the Eastern Alps (Nonsberg-Ulten zone): geochronology and new petrological constraints. Earth and Planetary Science Letters, 210, 509-526.
20. TUMIATI S., GODARD G., MARTIN S., NIMIS P., MAIR V. and BOYER B., 2005. Dissakisite-(La) from the Ulten zone peridotite (Italian Eastern Alps): A new end-member of the epidote group. American Mineralogist, 90, 1177-1185.