TY - JOUR
T1 - Three successive Proterozoic island arcs in the Northern Arabian-Nubian Shield
T2 - Evidence from SIMS U-Pb dating of zircon
AU - Eyal, Moshe
AU - Be'eri-Shlevin, Yaron
AU - Eyal, Yehuda
AU - Whitehouse, Martin J.
AU - Litvinovsky, Boris
N1 - Funding Information:
The authors are sincerely grateful to the editor T. Kusky and two anonymous reviewers for valuable notes and recommendations that provided significant improvement of the manuscript. Y. Be'eri-Shlevin would like to thank the Carlberger family for their warm hospitality during his stay in Stockholm. The NORDSIM facility (Swedish Museum of Natural History) is supported by the research councils of Denmark, Norway, and Sweden, the Geological Survey of Finland and the Swedish Museum of Natural History with additional support from the Knut and Alice Wallenberg Foundation. This is NORDSIM contribution 338.
PY - 2014/1/1
Y1 - 2014/1/1
N2 - Four isolated metamorphic complexes located within post-collisional granitoids occupying up to 70% of the total area, were distinguished in Sinai (Egypt) and Elat area (southern Israel), the northernmost part of the Arabian-Nubian Shield. The metamorphic rocks include metasediments, felsic and mafic metavolcanic rocks intruded by granitic, dioritic, and gabbroic plutons, all subjected to penetrative deformation.We present new SIMS U-Pb dating of zircons from 13 rock units comprising metasediments, volcanic rocks, gneisses and plutons from three metamorphic complexes (Sa'al, Feiran-Solaf, and Kid). In addition we present a SIMS U-Pb titanite age of a granitic gneiss previously dated using zircon. On the basis of the new and published U-Pb data, three successive Meso- to Neoproterozoic island arcs formed during a period of ca. 500. My are recognized. The Sa'al arc (represented by the oldest arc rocks in the ANS) evolved from 1.03 to 0.93. Ga (100. My); the Feiran-Elat arc developed from ca. 870 to 740. Ma (130. My), and the Kid arc formed from ca. 640 to 620. Ma (20. My). Evidence for an older, ca. 1.1. Ga, pre-Sa'al island arc was established from the zircon xenocryst population, though no exposures of rocks of this age were found. In the Sa'al and Kid arcs both volcanic and sedimentary rocks are preserved, whereas in the Elat-Feiran arc volcanic rocks are missing. We suggest that at ~. 700. Ma the Elat-Feiran arc was subjected to rifting that resulted in separating of the Qenaia block and its movement to the SE.
AB - Four isolated metamorphic complexes located within post-collisional granitoids occupying up to 70% of the total area, were distinguished in Sinai (Egypt) and Elat area (southern Israel), the northernmost part of the Arabian-Nubian Shield. The metamorphic rocks include metasediments, felsic and mafic metavolcanic rocks intruded by granitic, dioritic, and gabbroic plutons, all subjected to penetrative deformation.We present new SIMS U-Pb dating of zircons from 13 rock units comprising metasediments, volcanic rocks, gneisses and plutons from three metamorphic complexes (Sa'al, Feiran-Solaf, and Kid). In addition we present a SIMS U-Pb titanite age of a granitic gneiss previously dated using zircon. On the basis of the new and published U-Pb data, three successive Meso- to Neoproterozoic island arcs formed during a period of ca. 500. My are recognized. The Sa'al arc (represented by the oldest arc rocks in the ANS) evolved from 1.03 to 0.93. Ga (100. My); the Feiran-Elat arc developed from ca. 870 to 740. Ma (130. My), and the Kid arc formed from ca. 640 to 620. Ma (20. My). Evidence for an older, ca. 1.1. Ga, pre-Sa'al island arc was established from the zircon xenocryst population, though no exposures of rocks of this age were found. In the Sa'al and Kid arcs both volcanic and sedimentary rocks are preserved, whereas in the Elat-Feiran arc volcanic rocks are missing. We suggest that at ~. 700. Ma the Elat-Feiran arc was subjected to rifting that resulted in separating of the Qenaia block and its movement to the SE.
KW - Island arcs
KW - Northernmost Arabian-Nubian Shield
KW - Sinai
KW - Southern Israel
KW - Zircon U-Pb dating
UR - http://www.scopus.com/inward/record.url?scp=84886952566&partnerID=8YFLogxK
U2 - 10.1016/j.gr.2013.03.016
DO - 10.1016/j.gr.2013.03.016
M3 - Article
AN - SCOPUS:84886952566
SN - 1342-937X
VL - 25
SP - 338
EP - 357
JO - Gondwana Research
JF - Gondwana Research
IS - 1
ER -
