globalchange  > 影响、适应和脆弱性
DOI: 10.1007/s00531-016-1416-y
Scopus记录号: 2-s2.0-84994310348
论文题名:
Long-lasting Cadomian magmatic activity along an active northern Gondwana margin: U–Pb zircon and Sr–Nd isotopic evidence from the Brunovistulian Domain, eastern Bohemian Massif
作者: Soejono I.; Janoušek V.; ková E.; Sláma J.; Konopásek J.; Machek M.; Hanžl P.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2017
卷: 106, 期:6
起始页码: 2109
结束页码: 2129
语种: 英语
英文关键词: Bohemian Massif ; Brunovistulian Domain ; Cadomian magmatic arc ; Geochemistry ; Gondwana margin ; U–Pb geochronology
Scopus关键词: Cadomian orogeny ; geochronology ; Gondwana ; granite ; igneous geochemistry ; igneous intrusion ; magmatism ; neodymium isotope ; strontium isotope ; uranium-lead dating ; zircon ; Bohemian Massif
英文摘要:

Cadomian magmatic complexes of the Brunovistulian Domain crop out at the eastern termination of the Bohemian Massif. However, the age, nature and geotectonic affinity of some of pre-Variscan (meta-)igneous rock complexes from this domain are still unknown. Geochronological and geochemical study of the granitic rocks across the Brunovistulian Domain reveals new information about the timing and nature of this magmatic activity originally situated along the northern margin of Gondwana. Zircon U–Pb data (601 ± 3 Ma, Brno Massif; 634 ± 6 Ma, paraautochtonous core of the Svratka Dome; 568 ± 3 Ma, Bíteš orthogneiss) from the allochtonous Moravicum indicate the prolonged magmatic activity within the Brunovistulian Domain during the Ediacaran. The major- and trace-element and Sr–Nd isotopic signatures show heterogeneous geochemical characteristics of the granitic rocks and suggest a magmatic-arc geotectonic setting. The two-stage Depleted Mantle Nd model ages (c. 1.3–2.0 Ga) indicate derivation of the granitic rocks from a relatively primitive crustal source, as well as from an ancient and evolved continental crust of the Brunovistulian Domain. These results constrain the magmatic-arc activity to c. 635–570 Ma and provide a further evidence for a long-lived (at least c. 65 Myr) and likely episodic subduction-related magmatism at the northern margin of Gondwana. The presence of granitic intrusions derived from variously mature crustal sources at different times suggests heterogeneous crustal segments to having been involved in the magmatic-arc system during its multistage evolution. © 2016, Springer-Verlag Berlin Heidelberg.

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84994310348&doi=10.1007%2fs00531-016-1416-y&partnerID=40&md5=87408c4ae4f3cc75cb53a5a125013bdd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69996
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: Czech Geological Survey, Klárov 3, Prague 1, Czech Republic; Institute of Petrology and Structural Geology, Faculty of Science, Charles University, Albertov 6, Prague 2, Czech Republic; Institute of Geology of the CAS, v. v. i., Rozvojová 269, Prague 6, Czech Republic; Department of Geosciences, University of Tromsø – The Arctic University of Norway, Postboks 6050, Langnes, Tromsø, Norway; Institute of Geophysics of the CAS, v. v. i., Boční II-1401, Prague 4, Czech Republic

Recommended Citation:
Soejono I.,Janoušek V.,ková E.,et al. Long-lasting Cadomian magmatic activity along an active northern Gondwana margin: U–Pb zircon and Sr–Nd isotopic evidence from the Brunovistulian Domain, eastern Bohemian Massif[J]. International Journal of Earth Sciences,2017-01-01,106(6)
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