globalchange  > 影响、适应和脆弱性
DOI: 10.1007/s00531-014-1054-1
Scopus记录号: 2-s2.0-84948614433
论文题名:
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
作者: Ackerman L.; Medaris G.; Jr.; Špaček P.; Ulrych J.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2015
卷: 104, 期:8
起始页码: 1957
结束页码: 1979
语种: 英语
英文关键词: Bohemian Massif ; Mantle ; Metasomatism ; Ohře(Eger) rift ; Xenolith
Scopus关键词: igneous geochemistry ; mantle chemistry ; metasomatism ; peridotite ; petrology ; trace element ; xenolith ; Bohemia ; Bohemian Massif ; Czech Republic
英文摘要: 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. © 2014, Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84948614433&doi=10.1007%2fs00531-014-1054-1&partnerID=40&md5=717e20f202fe0b06c4647ef80269852c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70240
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Institute of Geology v.v.i., Academy of Sciences of the Czech Republic, Rozvojová 269, Prague 6, Czech Republic; Czech Geological Survey, Geologická 6, Prague 5, Czech Republic; Department of Geoscience, University of Wisconsin-Madison, Madison, WI, United States; Institute of Physics of the Earth, Masaryk University, Tvrdého 12, Brno, Czech Republic

Recommended Citation:
Ackerman L.,Medaris G.,Jr.,et al. 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[J]. International Journal of Earth Sciences,2015-01-01,104(8)
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