5 years ago

Nd, Pb, Hf isotope characteristics and provenance of glacial granitic pebbles from Late Ordovician diamictites in the Taurides, S Turkey

Nd, Pb, Hf isotope characteristics and provenance of glacial granitic pebbles from Late Ordovician diamictites in the Taurides, S Turkey
Outcrops of the Late Ordovician glacio-marine deposits in Tauride Anatolide Platform contain rare rounded/sub-rounded glacially transported granitic pebbles. Recently determined crystallization ages of the granitic fragments by LA-ICP-MS U-Pb zircon dating fall in two groups, 575 to 600Ma and 700 to 965Ma. Crystallization ages are in the range of juvenile magmatic rocks in the Arabian Nubian Shield except one sample implying pre-0.87Ga magmatic activity. All dated granitic pebbles geochemically show arc-related compositions and juvenile isotopic systematics (whole rock ƐNd(T), Pb-Pb and zircon ƐHf(T) isotopic data). Marginal arc type sources fit well with the geochemical and isotopic data of the granitic pebbles of 700 and 800Ma that have juvenile Hf-TDM and older Nd-TCR modal ages. However, A-type affinity of three samples, ranging from 575 to 600Ma show that they might have been derived from mixing of juvenile mantle and older crustal sources having older Hf-TDM and Nd-TCR modal ages. A 965Ma granitic fragment has the oldest Hf-TDM and Nd-TCR model age(s) implying involvement of pre-Neoproterozoic crustal source(s) in its genesis. These results collectively suggest that the glacio-marine successions in the Tauride Anatolide Platform were eroded from Neoproterozoic granitic/meta-granitic/meta-granodioritic rocks in the northern Nubian Shield (Egypt) and were then transported to the Tauride-Anatolide Platform by the glacial sheets during Late Ordovician time.

Publisher URL: www.sciencedirect.com/science

DOI: S1342937X17303349

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.