By Coltorti Massimo, H. Downes, M. Gregoire, S. Y. OReilly
A number of diversified databases and versions were built over decades of petrological learn performed via a number of ecu and non-European teams on mantle xenoliths, peridotite massifs, ophiolites and mafic magmas spanning in age from Archaean to fresh occasions. This quantity goals to assemble those assorted techniques and to combine the geochemical perceptions of the ecu top mantle. The papers contain nearby petrological reports of the eu lithospheric mantle, from Spain to the Pannonian Basin, from Corsica and Serbia as a ways north as Svalbard. Six contributions are according to reviews of mantle xenoliths, whereas the rest 3 take care of ophiolitic and peridotitic complexes. one other article presents an replace at the textural type of mantle rocks utilizing a computer-aided strategy and there's an introductory assessment.
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Extra resources for Petrological Evolution of the European Lithospheric Mantle
PICCARDO & L. GUARNIERI Table 8. 003 Abbreviation: bd, below detection. spinel lherzolite protoliths were resident in the subcontinental mantle under lithospheric conditions where they were equilibrated at an average continental geothermal gradient. e. the transition from spinel- to plagioclase-facies conditions) and MORB-type melt percolation. e. Opx þ Sp clusters, vermicular spinel exsolutions in Opx porphyroclasts and high Al core compositions in porphyroclastic pyroxenes) are preserved within the reactive spinel peridotites.
D. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. 12 (Continued) 29 SiO2 TiO2 Cr2O3 Al2O3 FeOT MnO MgO CaO Na2O K2O NiO MONTE MAGGIORE PERIDOTITE (CORSICA) SiO2 TiO2 Cr2O3 Al2O3 FeOT MnO MgO CaO Na2O K2O NiO Table 11. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. , not determined. d. d. d. d. d. d. d. d. 90 G. B. PICCARDO & L. GUARNIERI SiO2 TiO2 Cr2O3 Al2O3 FeOT MnO MgO CaO Na2O K2O NiO M40 Gabbro Plg gr 30 Sample M25 M25 M25 M25 M25 M25 M33 M33 M35 M35 M35 M35 M35 M35 M40 M40 Rock type Gabbro Gabbro Gabbro Gabbro Gabbro Gabbro Gabbro Gabbro Gabbro Gabbro Gabbro Gabbro Gabbro Gabbro Gabbro Gabbro Mineral Cpx gr Plg pc Plg pr Plg gr Ol gr Ol gr Cpx pr Cpx gr Cpx pc Cpx pr Cpx gr Plg pc Plg pr Plg gr Cpx pc Cpx gr MONTE MAGGIORE PERIDOTITE (CORSICA) 31 Table 12.
The lithospheric mantle was infiltrated via diffuse porous flow by single-melt increments showing depleted MORB characteristics, which were formed by about 6% degree of fractional melting of a DM spinel-facies asthenospheric mantle and survived unmixed and migrated isolated through the overlying mantle lithosphere. Diffuse melt percolation through the extending mantle lithosphere initiated at spinel-facies conditions, forming reactive spinel peridotites, and ceased at plagioclasefacies conditions forming impregnated plagioclase peridotites.