Geochemistry, Sr-Nd isotope data and petrogenesis of the Marziyan granitoid, Sanandaj–Sirjan Zone, western Iran

2015 ◽  
Vol 192 (2) ◽  
pp. 195-210
Author(s):  
E. Darvishi ◽  
M. Khalili ◽  
F. Toksoy-Köksal ◽  
S. Köksal ◽  
R. Beavers
Keyword(s):  
Nd Isotope ◽  
Western Iran ◽  
Isotope Data ◽  
Sanandaj Sirjan Zone

Petrogenesis and Sr-Nd isotope data of the Chadegan metabasites, Sanandaj-Sirjan Zone, Iran

2016 ◽  
Vol 279 (3) ◽  
pp. 311-322
Author(s):  
K. Akbari ◽  
S.M. Tabatabaei Manesh ◽  
J.F. Santos
Keyword(s):  
Nd Isotope ◽  
Isotope Data ◽  
Sanandaj Sirjan Zone

Origin of the Ordovician Mansehra granite in the NW Himalaya, Pakistan: constraints from Sr–Nd isotopic data, zircon U–Pb age and Hf isotopes

2018 ◽  
Vol 481 (1) ◽  
pp. 277-298 ◽  
Author(s):  
Masatsugu Ogasawara ◽  
Mayuko Fukuyama ◽  
Rehanul Haq Siddiqui ◽  
Ye Zhao
Keyword(s):  
Granitic Magma ◽  
Geochemical Data ◽  
Large Contribution ◽  
Crustal Material ◽  
Sr Isotope ◽  
Nw Himalaya ◽  
Nd Isotope ◽  
Isotope Data ◽  
Late Neoproterozoic ◽  
T Values

AbstractThe Mansehra granite in the NW Himalaya is a typical Lesser Himalayan granite. We present here new whole-rock geochemistry, Rb–Sr and Sm–Nd isotope data, together with zircon U–Pb ages and Hf isotope data, for the Mansehra granite. Geochemical data for the granite show typical S-type characteristics. Zircon U–Pb dating yields 206Pb/238U crystallization ages of 483–476 Ma. The zircon grains contain abundant inherited cores and some of these show a clear detrital origin. The 206Pb/238U ages of the inherited cores in the granite cluster in the ranges 889–664, 1862–1595 and 2029 Ma. An age of 664 Ma is considered to be the maximum age of the sedimentary protoliths. Thus the Late Neoproterozoic to Cambrian sedimentary rocks must be the protolith of the Mansehra granitic magma. The initial Sr isotope ratios are high, ranging from 0.7324 to 0.7444, whereas the εNd(t) values range from −9.2 to −8.6, which strongly suggests a large contribution of old crustal material to the protoliths. The two-stage Nd model ages and zircon Hf model ages are Paleoproterozoic, indicating that the protolith sediments were derived from Paleoproterozoic crustal components.

Nd and Pb isotope mapping of crustal domains within the Makkovik Province, Labrador

2018 ◽  
Vol 156 (5) ◽  
pp. 833-848 ◽  
Author(s):  
R. M. MOUMBLOW ◽  
G. A. ARCURI ◽  
A. P. DICKIN ◽  
C. F. GOWER
Keyword(s):  
Early Stage ◽  
Foreland Basin ◽  
Mobile Belt ◽  
South American ◽  
Pb Isotope ◽  
Volcanic Arc ◽  
Nd Isotope ◽  
North American Cordillera ◽  
Tectonic Model ◽  
Isotope Data

AbstractThe Makkovik Province of eastern Labrador represents part of an accretionary orogen active during an early stage in the development of the Palaeoproterozoic southern Laurentian continental margin. New Nd isotope data for the eastern Makkovik Province suggest that accreted juvenile Makkovik crust was generated in the Cape Harrison domain during a single crust-forming event at c. 2.0 Ga. Pb isotope data support this model, and show a strong similarity to radiogenic crustal signatures in the juvenile Palaeoproterozoic crust of the Ketilidian mobile belt of southern Greenland. As previously proposed, an arc accretion event at c. 1.9 Ga triggered subduction-zone reversal and the development of an ensialic arc on the composite margin. After the subduction flip, a temporary release of compressive stress at c. 1.87 Ga led to the development of a retro-arc foreland basin on the downloaded Archean continental edge, forming the Aillik Group. Unlike previous models, a second arc is not envisaged. Instead, a compressive regime at c. 1.82 Ga is attributed to continued ensialic arc plutonism on the existing margin. The tectonic model for the Makkovikian orogeny proposed here is similar to that for the Ketilidian orogeny. Major- and trace-element analyses suggest that much of the magmatism in the Makkovik orogen results from post-accretionary ensialic arc activity, and that few vestiges remain of the original accreted volcanic arc. This pattern of arc accretion and intense post-accretion reworking is common to many accretionary orogens, such as the South American Andes and North American Cordillera.

Petrography and Mineral Chemistry of the Boroujerd Pluton (Sanandaj-Sirjan Zone, Western Iran)

2009 ◽  
Vol 9 (5) ◽  
pp. 843-853 ◽  
Author(s):  
A. Ahmadi Khalaji ◽  
Z. Tahmasbi ◽  
R. Zarei Sahamieh
Keyword(s):  
Mineral Chemistry ◽  
Western Iran ◽  
Sanandaj Sirjan Zone

Petrography and Geochemistry Characteristic of Enclaves in the Astaneh Pluton (Sanandaj-Sirjan Zone, Western Iran)

2008 ◽  
Vol 8 (23) ◽  
pp. 4251-4262 ◽  
Author(s):  
Z. Tahmasbi ◽  
M. Khalili ◽  
A. Castro ◽  
A. Ahmadi
Keyword(s):  
Western Iran ◽  
Sanandaj Sirjan Zone

Sources of Ore Substance of Carbonatite Complexes of the Ural Fold Belt: Rb–Sr and Sm–Nd Isotope Data

2018 ◽  
Vol 480 (2) ◽  
pp. 773-777 ◽  
Author(s):  
I. L. Nedosekova ◽  
V. A. Koroteev ◽  
T. B. Bayanova ◽  
B. V. Belyatsky
Keyword(s):  
Fold Belt ◽  
Nd Isotope ◽  
Isotope Data

U-Pb zircon dating, geochemistry and Sr-Nd-Pb isotopic ratios from Azna-Dorud Cadomian metagranites, Sanandaj-Sirjan Zone of western Iran

2018 ◽  
Vol 306 ◽  
pp. 41-60 ◽  
Author(s):  
Nahid Shabanian ◽  
Ali Reza Davoudian ◽  
Yunpeng Dong ◽  
Xiaoming Liu
Keyword(s):  
Isotopic Ratios ◽  
Western Iran ◽  
Zircon Dating ◽  
Sanandaj Sirjan Zone
Sign in / Sign up

Export Citation Format

Share Document