Contribution of pre Pan-African crust to formation of the Arabian Nubian Shield: New secondary ionization mass spectrometry U-Pb and O studies of zircon

Abstract

Research Article| October 01, 2009 Contribution of pre Pan-African crust to formation of the Arabian Nubian Shield: New secondary ionization mass spectrometry U-Pb and O studies of zircon Yaron Be'eri-Shlevin; Yaron Be'eri-Shlevin * 1Department of Geological and Environmental Sciences, Ben-Gurion University, Beer-Sheva, Israel 2Laboratory for Isotope Geology, Swedish Museum of Natural History, Stockholm, Sweden *E-mail: yaron.beeri@nrm.se. Search for other works by this author on: GSW Google Scholar Yaron Katzir; Yaron Katzir 1Department of Geological and Environmental Sciences, Ben-Gurion University, Beer-Sheva, Israel Search for other works by this author on: GSW Google Scholar Martin J. Whitehouse; Martin J. Whitehouse 2Laboratory for Isotope Geology, Swedish Museum of Natural History, Stockholm, Sweden Search for other works by this author on: GSW Google Scholar Ilka C. Kleinhanns Ilka C. Kleinhanns 3Geowissenschaftliches Zentrum der Universität Göttingen, Göttingen, Germany Search for other works by this author on: GSW Google Scholar Geology (2009) 37 (10): 899–902. https://doi.org/10.1130/G30206A.1 Article history received: 09 Mar 2009 rev-recd: 12 May 2009 accepted: 19 May 2009 first online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Yaron Be'eri-Shlevin, Yaron Katzir, Martin J. Whitehouse, Ilka C. Kleinhanns; Contribution of pre Pan-African crust to formation of the Arabian Nubian Shield: New secondary ionization mass spectrometry U-Pb and O studies of zircon. Geology 2009;; 37 (10): 899–902. doi: https://doi.org/10.1130/G30206A.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract New secondary ionization mass spectrometry U-Pb and O isotope analyses of detrital zircons from the Sa'al schist in Sinai coupled with whole-rock Nd isotopic analyses provide new evidence of pre- Neoproterozoic crust in the northernmost Arabian-Nubian Shield (ANS). The detrital zircon age population is bimodal, with concordia ages of 1029 ± 7 Ma and 1110 ± 8 Ma. The whole-rock ϵNd(t = 1.0 Ga) value of +2 is significantly lower than found for juvenile Neoproterozoic rocks in the region. Thus, the Sa'al schist is interpreted to represent Kibaran (Grenville) age crust incorporated into the northernmost ANS. The δ18O (zircon) values (6.1‰–9.4‰) imply that supracrustal recycling was involved in the formation of this ca. 1.0–1.1 Ga crust. A compilation of reported xenocrystic and detrital pre-ANS zircons and the variability of Nd, Sr, Pb, and O isotopic compositions within the shield suggests that its northernmost and eastern margins were more strongly contaminated by older crust ca. 0.9–3.0 Ga old. The distribution of 0.9–1.1 Ga xenocrystic and detrital zircons mainly in the east and north of the ANS suggests that such crust characterized parts of the northeastern margin of western Gondwana prior to ANS formation, and that 0.9–1.1 Ga old zircons detected in lower Paleozoic sandstone cover may have a proximal provenance. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.