Baltica- and Gondwana-derived sediments in the Mid-German Crystalline Rise (Central Europe): Implications for the closure of the Rheic ocean

Baltica- and Gondwana-derived sediments in the Mid-German Crystalline Rise (Central Europe):... Combined U–Pb and Lu–Hf isotope analysis of detrital zircons reveals that the Mid-German Crystalline Rise (MGCR) contains Palaeozoic sediments of distinct provenance in close proximity. Zircons from a metapelite of the Brotterode group were derived from a Gondwanan source, whereas zircons from the Rögis quartzite of the Ruhla group point to provenance from Baltica. Brotterode zircons mostly yield ages of 500–720 Ma and 2.0–2.1 Ga, and show an age gap between 1.0 and 1.7 Ga, which is characteristic of Gondwana/peri-Gondwanan detrital zircon populations. Combined U–Pb and Hf isotope data suggest intense crustal recycling at 2.6–2.9 Ga, 1.8–2.1 Ga, and 570–720 Ma as well as formation of juvenile crust during the latter two periods. In contrast, zircons of the Rögis quartzite mostly yield ages between 0.9 and 1.8 Ga, which are typical of southwestern Baltica. Minor age populations at 435–466 and 550–660 Ma indicate that the quartzite is younger than Late Ordovician/Early Silurian, and that the Baltica-derived sediment is contaminated by minor peri-Gondwanan, perhaps Avalonia-derived detritus. Minor age populations at 2.0, 2.56, 2.67, and 2.86 Ga additionally point to a Svecofennian and/or Karelian source. U–Pb and Hf isotope data imply that the Baltica-derived zircons were produced mainly through melting of juvenile Palaeo- to Mesoproterozoic crust. The data presented here indicate that the MGCR hosts the Rheic suture between Gondwana and Balonia, and that this suture zone was closed in a complex sequence of stages from the Late Silurian onwards. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Gondwana Research Elsevier

Baltica- and Gondwana-derived sediments in the Mid-German Crystalline Rise (Central Europe): Implications for the closure of the Rheic ocean

Loading next page...
 
/lp/elsevier/baltica-and-gondwana-derived-sediments-in-the-mid-german-crystalline-QzNYEruary
Publisher
Elsevier
Copyright
Copyright © 2009 International Association for Gondwana Research
ISSN
1342-937X
D.O.I.
10.1016/j.gr.2009.08.004
Publisher site
See Article on Publisher Site

Abstract

Combined U–Pb and Lu–Hf isotope analysis of detrital zircons reveals that the Mid-German Crystalline Rise (MGCR) contains Palaeozoic sediments of distinct provenance in close proximity. Zircons from a metapelite of the Brotterode group were derived from a Gondwanan source, whereas zircons from the Rögis quartzite of the Ruhla group point to provenance from Baltica. Brotterode zircons mostly yield ages of 500–720 Ma and 2.0–2.1 Ga, and show an age gap between 1.0 and 1.7 Ga, which is characteristic of Gondwana/peri-Gondwanan detrital zircon populations. Combined U–Pb and Hf isotope data suggest intense crustal recycling at 2.6–2.9 Ga, 1.8–2.1 Ga, and 570–720 Ma as well as formation of juvenile crust during the latter two periods. In contrast, zircons of the Rögis quartzite mostly yield ages between 0.9 and 1.8 Ga, which are typical of southwestern Baltica. Minor age populations at 435–466 and 550–660 Ma indicate that the quartzite is younger than Late Ordovician/Early Silurian, and that the Baltica-derived sediment is contaminated by minor peri-Gondwanan, perhaps Avalonia-derived detritus. Minor age populations at 2.0, 2.56, 2.67, and 2.86 Ga additionally point to a Svecofennian and/or Karelian source. U–Pb and Hf isotope data imply that the Baltica-derived zircons were produced mainly through melting of juvenile Palaeo- to Mesoproterozoic crust. The data presented here indicate that the MGCR hosts the Rheic suture between Gondwana and Balonia, and that this suture zone was closed in a complex sequence of stages from the Late Silurian onwards.

Journal

Gondwana ResearchElsevier

Published: Mar 1, 2010

References

  • Crustal evolution in the SW part of the Baltic Shield: the Hf Isotope Evidence
    Andersen, T.; Griffin, W.L.; Pearson, N.J.
  • The Lu–Hf and Sm–Nd isotopic composition of CHUR: constraints from unequilibrated chondrites and implications for the bulk composition of terrestrial planets
    Bouvier, A.; Vervoort, J.D.; Patchett, P.J.
  • Combined U–Pb and Hf isotope LA-(MC)-ICP-MS analyses of detrital zircons: comparison with SHRIMP and new constraints for the provenance and age of an Armorican metasediment in Central Germany
    Gerdes, A.; Zeh, A.
  • Precambrian protoliths and Early Paleozoic magmatism in the French Massif Central: U–Pb data and the North Gondwana connection in west European Variscan belt
    Melleton, J.; Cocherie, A.; Faure, M.; Rossi, P.
  • The Grenvillian and Pan-African orogens: world's largest orogenies through geologic time, and their implications on the origin of superplume
    Rino, S.; Kon, Y.; Sato, W.; Maruyama, S.; Santosh, M.; Zhao, D.
  • Protolith ages and timing of deformation in the eastern marginal part of the Sveconorwegian orogen, southwestern Sweden
    Sönderlund, U.; Jarl, L.-G.; Persson, P.-O.; Stephens, M.B.; Wahlgreen, C.-H.
  • The composition of the continental crust
    Wedepohl, K.H.
  • Isobaric cooling and anti-clockwise P-T paths in the Variscan Odenwald Crystalline Complex
    Will, T.M.; Schmädicke, E.

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off