caa a22 4500 606149732 CHVBK 20210128100535.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s00531-014-1054-1 doi (NATIONALLICENCE)springer-10.1007/s00531-014-1054-1 Geochemical and petrological constraints on mantle composition of the Ohře(Eger) rift, Bohemian Massif: peridotite xenoliths from the České Středohoří Volcanic complex and northern Bohemia [Elektronische Daten] [Lukáš Ackerman, Gordon Medaris Jr., Petr Špaček, Jaromír Ulrych] The Ohře(Eger) rift in the Bohemian Massif, which represents part of the Cenozoic Central European Volcanic Province, contains abundant mantle xenoliths of spinel peridotite. Petrography, geothermometry, mineral compositions and whole-rock and clinopyroxene trace element compositions of xenolith suites from four localities in the central part České Středohoří Volcanic complex (CSVC) and one locality in the eastern continuation (northern Bohemia) of the rift system display important differences that reveal small-scale compositional heterogeneity of the mantle. The xenoliths from the CSVC are mostly harzburgite that experienced high degrees of partial melting from ~17 to 21%. However, xenoliths from one locality, Medvědický vrch, are predominantly fertile lherzolite. Subsequent pervasive metasomatism produced enrichments in light rare earth elements, large-ion lithophile elements, and U and Th, except for xenoliths from Medvědický vrch, which show marked depletions in all these elements. Such composition most likely reflects refertilization of the source rock by depleted melts. The trace element characteristics of the CSVC xenoliths indicate metasomatism of a depleted protolith by silicate melt at high melt/rock ratios. In contrast, harzburgite xenoliths from northern Bohemia experienced metasomatism at low melt/rock ratios by more evolved, alkaline and carbonate-rich melts. Springer-Verlag Berlin Heidelberg, 2014 Mantle nationallicence Xenolith nationallicence Bohemian Massif nationallicence Ohře(Eger) rift nationallicence Metasomatism nationallicence Ackerman Lukáš Institute of Geology v.v.i., Academy of Sciences of the Czech Republic, Rozvojová 269, 165 00, Prague 6, Czech Republic aut Medaris Jr. Gordon Department of Geoscience, University of Wisconsin-Madison, 53706, Madison, WI, USA aut Špaček Petr Institute of Physics of the Earth, Masaryk University, Tvrdého 12, 602 00, Brno, Czech Republic aut Ulrych Jaromír Institute of Geology v.v.i., Academy of Sciences of the Czech Republic, Rozvojová 269, 165 00, Prague 6, Czech Republic aut International Journal of Earth Sciences Springer Berlin Heidelberg 104/8(2015-11-01), 1957-1979 1437-3254 104:8<1957 2015 104 531 https://doi.org/10.1007/s00531-014-1054-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00531-014-1054-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ackerman Lukáš Institute of Geology v.v.i., Academy of Sciences of the Czech Republic, Rozvojová 269, 165 00, Prague 6, Czech Republic aut NATIONALLICENCE 700 1- Medaris Jr Gordon Department of Geoscience, University of Wisconsin-Madison, 53706, Madison, WI, USA aut NATIONALLICENCE 700 1- Špaček Petr Institute of Physics of the Earth, Masaryk University, Tvrdého 12, 602 00, Brno, Czech Republic aut NATIONALLICENCE 700 1- Ulrych Jaromír Institute of Geology v.v.i., Academy of Sciences of the Czech Republic, Rozvojová 269, 165 00, Prague 6, Czech Republic aut NATIONALLICENCE 773 0- International Journal of Earth Sciences Springer Berlin Heidelberg 104/8(2015-11-01), 1957-1979 1437-3254 104:8<1957 2015 104 531