DOI: 10.1007/s00531-013-0948-7
论文题名: Tertiary alkaline Roztoky Intrusive Complex, České středohoří Mts., Czech Republic: Petrogenetic characteristics
作者: Skála R. ; Ulrych J. ; Ackerman L. ; Jelínek E. ; Dostál J. ; Hegner E. ; Řanda Z.
刊名: International Journal of Earth Sciences
出版年: 2014
卷: 103, 期: 5 起始页码: 1233
结束页码: 1262
语种: 英语
英文关键词: Alkaline intrusions
; Bohemian Massif
; Cenozoic
; Continental rift
; Geochemistry
; Roztoky Intrusive Complex
Scopus关键词: alkaline rock
; Cenozoic
; dike swarm
; fractional crystallization
; geochemistry
; hypabyssal rock
; igneous intrusion
; lithospheric structure
; magma
; petrogenesis
; rift zone
; syenite
; Tertiary
; Bohemian Massif
; Ceske Stredohori Mountains
; Czech Republic
; Roztoky
; Ustecky
英文摘要: The České středohoří Mts. is the dominant volcanic center of the Ohře (Eger) rift zone. It hosts the Roztoky Intrusive Complex (RIC), which is made up of a caldera vent and intrusions of 33-28-Ma-old hypabyssal bodies of essexite-monzodiorite-sodalite syenite series accompanied by a radially oriented 30-25-Ma-old dike swarm comprising about 1,000 dikes. The hypabyssal rocks are mildly alkaline mostly foid-bearing types of mafic to intermediate compositions. The dike swarm consists of chemically mildly alkaline and rare strongly alkaline rocks (tinguaites). The geochemical signatures of the mildly alkaline hypabyssal and associated dike rocks of the RIC are consistent with HIMU mantle sources and contributions from lithospheric mantle. The compositional variations of essexite and monzodiorite can be best explained by fractional crystallization of parent magma without significant contributions of crustal material. On the other hand, the composition of monzosyenite, leuco-monzodiorite and sodalite syenite reflects fractional crystallization coupled with variable degrees of crustal assimilation. It is suggested that the parent magmas in the Ohře rift were produced by an adiabatic decompression melting of ambient upper mantle in response to lithospheric extension associated with the Alpine Orogeny. © 2013 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84902517811&doi=10.1007%2fs00531-013-0948-7&partnerID=40&md5=4d737d1a107cea381b583400f127c95b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70335
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, 165 00 Prague 6, Czech Republic; Institute of Geochemistry, Mineralogy and Mineral Resources, Charles University in Prague, Albertov 6, 128 43 Prague 6, Czech Republic; Department of Geology, Saint Mary's University, Halifax, NS, B3H3 3C3, Canada; Department für Geowissenschaften, Universität München, Theresienstraße 41, 80333 Munich, Germany; Nuclear Physics Institute, v. v. i., Academy of Sciences of the Czech Republic, 250 68 Řež, Czech Republic
Recommended Citation:
Skála R.,Ulrych J.,Ackerman L.,et al. Tertiary alkaline Roztoky Intrusive Complex, České středohoří Mts., Czech Republic: Petrogenetic characteristics[J]. International Journal of Earth Sciences,2014-01-01,103(5)