The North Lanzo peridotite body (NW Italy): Lithospheric mantle percolated by MORB and alkaline melts

Periodico di Mineralogia

Volumn 76, Issue 3, 2007, Pages 199-221

  Piccardo, Giovanni B ^a   Zanetti, Alberto ^b   Pruzzo, Azzurra ^a   Padovano, Matteo ^a  

^a UNIVERSITY OF GENOA   (Italy)

^b CNR   (Italy)

Author keywords

Jurassic Ligurian Tethys; Mantle petrology; Melt percolation; MORB and alkaline melts; North Lanzo peridotite

Indexed keywords

EID: 84879223299     PISSN: 03698963     EISSN: 22391002     Source Type: Journal    
DOI: 10.2451/2007PM0025     Document Type: Article

References (36)

1. Bodinier J-L. (1988) - Geochemistry and petrogenesis of the Lanzo peridotite body, Western Alps. Tectonophysics, 149, 67-88.
2. Bodinier J.L. and Godard M. (2003) - Orogenic, Ophiolitic, and Abyssal Peridotites. Treatise on Geochemistry, Volume 2, Elsevier, Amsterdam, 103-170.
3. Bodinier J-L., Guiraud M., Dupuy C. and Dostal J. (1986) - Geochemistry of basic dikes in the Lanzo massif (Western Alps): petrogenetic and geodynamic implications. Tectonophysics, 128, 75-95.
4. Bodinier J-L., Menzies M. A. and Thirlwall M.F. (1991) - Continental to Oceanic Mantle Transition: REE and Sr-Nd Isotopic Geochemistry of the Lanzo Lherzolite Massif. J. Petrol. (Special Lherzolite Issue), 20, 191-210.
5. Boudier F. (1978) - Structure and petrology of the Lanzo peridotite massif (Piedmont Alps). Geol. Soc. Am. Bull., 89, 1574-1591.
6. Bucher K. and Frey M. (2002) - Petrogenesis of Metamorphic Rocks. Springer-Verlag, Berlin Heidelberg, 341 pp.
7. Cortesogno L., Gaggero L. and Zanetti A. (2000) - Rare earth and trace elements in igneous and hightemperature metamorphic minerals of oceanic gabbros (MARK area, Mid-Atlantic Ridge). Contrib. Mineral. Petrol. 139, 373-393.
8. Corti G., Bonini M., Innocenti F., Manetti P., Piccardo G.B. and Ranalli G. (2007) - Experimental models of extension of continental lithosphere weakened by percolation of asthenospheric melts, J. Geodyn., 43, 465-483.
9. Hirschmann M.M., Kogiso T., Baker M.B. and Stolper E.M. (2003) - Alkalic magmas generated by partial melting of garnet pyroxenite. Geology, 31, 481-484.
10. Hart S.R. and Dunn T. (1993) - Experimental cpx/melt partitioning of 24 trace elements. Contrib. Mineral. Petrol., 113, 1-8.
11. Kaczmarek M.- A., Rubatto D. and Müntener O. (2005) - SHRIMP U-Pb zircon dating of gabbro and granulite from the peridotite massif of Lanzo (Italy). Geophys. Res. Abs., 7, 03098.
12. Lagabrielle Y., Fudral S. and Kienast J-R. (1989) - La couverture océanique des ultrabasites de Lanzo (Alpes occidentales): arguments lithostratigraphiques et pétrologiques [the oceanic cover of the Lanzo peridotite body (Western Italian Alps): lithostratigraphic and petrological evidences]. Geodin. Acta, 3, 43-55.
13. Montanini A., Tribuzio R. and Anczk iewicz R. (2006) - Exhumation history of a garnet pyroxenite-bearing mantle section from a continent-ocean transition (Northern Apennine ophiolites, Italy). J. Petrol., 47, 1943-1971.
14. Montanini A. and Tribuzio R. (2007a) - Magmatic activity during continental breakup and ocean opening recorded by the external liguride ophiolites (Northern Apennines, Italy): implications for a mixed peridotite-pyroxenite mantle source. Epitome 2007, Geoitalia 2007, 2, 13-14.
15. Montanini A. and Tribuzio R. (2007b) - Petrogenesis of basalts and gabbros from an ancient continentocean transition (External Liguride ophiolites, Northern Italy): implications for a pyroxenitederived component. Epitome 2007, Geoitalia 2007, 2, 110.
16. Montanini A.,Tribuzio R. and Vernia L. (2007) -Petrogenesis of basalts and gabbros from an ancient continent-ocean transition (External Liguride ophiolites, Northern Italy). Lithos, (in press).
17. Müntener O., Piccardo G.B., Polino R. and Zanetti A. (2005) - Revisiting the Lanzo peridotite (NWItaly): "asthenospherization" of ancient mantle lithosphere. Ofioliti, 30, 111-124.
18. Nicolas A. (1974) - Mise en place des péridotites de Lanzo (Alpes piémontaises) Relation avec tectonique et métamorphisme alpins: conséquences géodynamiques. Schweiz. Mineral. Petrogr. Mitt., 54, 449-460.
19. Nicolas A. (1984) - Lherzolites of the Western Alps: a structural review. In: Kornprobst J. (Ed.), 5th Int. Kimberlite Conf. Proc., Elsevier, Amsterdam, 333-345.
20. Nicolas A. (1986) - A melt extraction model based on structural studies in mantle peridotites. J. Petrol., 27, 999-1022.
21. Nicolas A. and Dupuy C. (1984) -Origin of ophiolitic and oceanic lherzolites. Tectonophysics, 110, 177-187.
22. Niu Y. (1997) - Mantle melting and mantle extraction processes beneath ocean ridges: evidence from abyssal peridotites. J. Petrol., 38, 1047-1074.
23. Pelletier L. and Müntener O. (2006) - High pressure metamorphism of the Lanzo peridotite and its oceanic cover, and some consequences for the Sesia-Lanzo zone (northwestern Italian Alps). Lithos, 90 (1), p.111-130.
24. Petermann M. and Hirschmann M.M. (2003) - Partial melting experiments on a MORB-like pyroxenite between 2 and 3 Gpa: constraints on the presence of pyroxenite in basalt source regions from solidus location and melting rate. J. Geophys. Res., 108, 2125.
25. Piccardo G.B. (2003) - Mantle processes during ocean formation: petrologic records in peridotites from the Alpine-Apennine ophiolites. Episodes, 26, 193-200.
26. Piccardo G.B. (2007) - The Ligurian Tethys, a Jurassic ultra-slow spreading ocean. Per. Mineral., 76, 67-80.
27. Piccardo G.B. (2008) - The Jurassic Ligurian Tethys, a fossil ultra-slow spreading ocean: the mantle perspective. In: Coltorti, M. and Gregoire, M. (Eds.), Metasomatism in Oceanic and Continental Lithospheric Mantle. Geol Soc. London, Special Publications, 293, (in press).
28. Piccardo G.B. and Vissers R.L.M. (2007) - The preoceanic evolution of the Erro-Tobbio peridotite (Voltri Massif - Ligurian Alps, Italy). J. Geodyn., 43, 417-449.
29. Piccardo G.B., Ramp one E., Tribuzio R., Molli G., Borghini G. and Poggi E. (2006). The Ligurian ophiolites: remnants of the Jurassic Tethys oceanic lithosphere. Polar Ridges Meeting and Workshop 2006, Field Excursion Guidebook, 1-15.
30. Piccardo G.B., Zanetti A. and Müntener O. (2007) - Melt/peridotite interaction in the South Lanzo peridotite: field, textural and geochemical evidence. Lithos, 94, 181-209.
31. Pognante U. (1989) - Lawsonite, blueschist and eclogite formation in the southern Sesia zone (Western Alps, Italy). Eur. J. Mineral., 1, 89-104.
32. Ranalli G., Piccardo G.B. and Corona-Chavez P. (2007) - Softening of the subcontinental lithospheric mantle by asthenosphere melts and the continental extension/oceanic spreading transition. J. Geodyn., 43, 450-464.
33. Rivalenti G., Mazzucchelli M., Vannucci R., Hofmann A.W., Ottolini L., Bottazzi P. and Obermiller W. (1995) - The relationship between websterite and peridotite in the Balmuccia massif as revealed by trace element variations in clinopyroxene. Contrib. Mineral. Petrol., 121, 275-288.
34. Rivalenti G., Zanetti A., Girardi V. A.V., Mazzucchelli M., Tassinari C.G.C. and Bertotto G.W. (2007) - The effect of the Fernando de Noronha plume on the mantle lithosphere in north-eastern Brazil. Lithos, 94, 111-131.
35. Spalla M.I., De maria L., Gosso G., Miletto M. and Pognante U. (1983) - Deformazione e metamorfismo della zona Sesia-Lanzo meridionale al contatto con la falda piemontese e con il massiccio di Lanzo, Alpi occidentali. Mem. Soc. Geol. It., 26, 499-514.
36. Zanetti A., D'antonio M., Spadea P., Raffone N., Vannucci R. and Bruguier O. (2006) - Petrogenesis of mantle peridotites from the Izu-Bonin-Mariana (IBM) forearc. Ofioliti, 31, 183-200.