Orogenic lherzolite

Lorand J. P. (1991) Sulphide petrology and sulphur geochemistry of orogenic Iherzolites A comparative study between Pyrenean bodies (France) and the Lanzo massif (Italy). In Orogenic Lherzolites and Mantle Processes (ed. M. A. Menzies) J. Petrol. 32, pp. 77-95. 

Gmau G., Lecuyer C., Bernard-Griffiths J., and Morin N. (1991) Origin and petrogenesis of the Trinity ophiohte complex (California) new constraints from REE and Nd isotope data. In Orogenic Lherzolites and Mantle Processes, Spec. Vol. J. Petrol, (eds. M A. Menzies, C. Dupuy, and A. Nicolas). Oxford University Press, Oxford, UK, pp. 229-242. 

Obata M. and Niida K. (2002) Summary and Synthesis. In Fourth International Workshop on Orogenic Lherzolites and Mantle Processes Field Guide. Samani, Hokkaido, pp. 63—64. 

Ionov D. A., and Weis D. (2002) Hf isotope composition of mantle peridotites first results and inferences for the age and evolution of the hthospheric mantle. Abstract, 4th Int. Workshop on Orogenic Lherzolites and Mantle Processes, Samani, Japan, pp. 56—57. 

Most of the orogenic spinel Lherzolites also contain small amounts of amphibole ( 1 %) textu-rally equilibrated with the peridotite minerals. These amphiboles have been ascribed to the infiltration of melts/fluids in mantle conditions (Fabries et al., 1991), but their presence is not associated with noticeable chemical enrichments (Vannucci et al., 1995). A possible explanation is that the liquid/rock ratio was so low that the fluid composition was buffered by the LREE-depleted composition of the peridotites. Alternatively, these amphiboles might represent the products of a late crystallization stage during fertilization of the peridotites by LREE-depleted basaltic melts. 

Menzies M. A. and Dupuy C. (1991) Orogenic massifs protolith, process and provenance. J. Petrol. (Special Lherzolites Issue) 1 -16. 

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