Origin and evolution of Avalonia: evidence from U–Pb and Lu–Hf isotopes in zircon from the Mira terrane, Canada, and the Stavelot–Venn Massif, Belgium
Origin and evolution of Avalonia: evidence from U–Pb and Lu–Hf isotopes in zircon from the Mira terrane, Canada, and the Stavelot–Venn Massif, Belgium
复制标题
Avalonia 的起源和演化:加拿大 Mira 地体和比利时 StavelotâVenn 地块锆石中 UâPb 和 LuâHf 同位素的证据
DOI:
10.1144/jgs2012-152
复制
发表时间:
2013
影响因子:
2.7
通讯作者:
Massone H.-J
中科院分区:
文献类型:
--
作者:
Willner A;Gerdes A;Massone H.-J
Laser ablation inductively coupled plasma mass spectrometry U–Pb and Lu–Hf isotope analyses of detrital zircon from Neoproterozoic–Cambrian clastic sedimentary rocks in the Mira terrane (Cape Breton Island, Nova Scotia, Canada; West Avalonia) and the Stavelot–Venn Massif (East Belgium; East Avalonia) support deposition on an originally coherent microcontinent. Crustal evolution trends defined by ϵHf(t)values varying with age reflect juvenile magma production in the source continent at 1.2–2.2 and 2.4–3.1 Ga. Mixing of juvenile and recycled crust in continental magmatic arcs is recognized at 0.5–0.72, 1.4–1.7, 1.8–2.2 and 2.4–2.7 Ga. These results concur with the crustal evolution in Amazonia, the likely parent craton. Crustal evolution in Avalonia is recorded in detrital and magmatic zircon from Neoproterozoic arcs (680–550 Ma). Positive ϵHf(t)values suggest juvenile input and mixing with recycled crust. Most negative ϵHf(t)values represent recycling of predominantly Mesoproterozoic underlying crust. Avalonian arc magmatism was followed by late Neoproterozoic–early Cambrian sedimentation in various belts in West Avalonia. These belts were juxtaposed by strike-slip during late early Cambrian deposition in a rift basin. The youngest detrital zircon population (c. 517 Ma) probably represents synrift magmatism before break-up of Avalonia. Migmatization at 406 ± 2 Ma in a xenolith from the East Avalonian crust reflects post-collisional heating.Supplementary materialsDetails of sample locations and analytical results are available at www.geolsoc.org.uk/SUP18641.
登录
查看更多内容
影响因子:
2.7
作者:
S. Samson;R. D'lemos;B. Miller;M. Hamilton
通讯作者:
M. Hamilton
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
T. Palacios;S. Jensen;S. Barr;C. White
通讯作者:
C. White
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
A. Willner;S. Sindern;R. Metzger;T. Ermolaeva;U. Kramm;V. Puchkov;A. Kronz
通讯作者:
A. Kronz
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
A. Willner;H. Massonne;S. Barr;C. White
通讯作者:
C. White
DOI:
--
发表时间:
2010
期刊:
The Journal of geology
影响因子:
--
作者:
A. Satkoski;S. Barr;S. Samson
通讯作者:
S. Samson