U–Pb zircon geochronology, petrochemical and Sr–Nd isotopic characteristic of Late Neoproterozoic granitoid of the Bornaward Complex (Bardaskan-NE Iran)

Bagherzadeh, Reza Monazzami; Karimpour, Mohammad Hassan; Farmer, G. Lang; Stern, Charles R.; Santos, J. F.; Rahimi, Behnam; Shahri, Mohammad Reza Heidarian

doi:10.1016/j.jseaes.2015.05.019

Cited by 37 publications

(10 citation statements)

References 39 publications

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“…One additional sample (F2‐02) is from the Neoproterozoic Bornaward granodiorite at the footwall of the Taknar Fault, with a zircon U–Pb crystallization age of ca. 540 Ma (Monazami Bagherzadeh et al, ) (Figure ).…”

Section: Thermochronologymentioning

confidence: 99%

“…The Taknar Fm consists of Late Neoproterozoic metasandstones, crystalline limestones, green chlorite schists, tuffy sandstones, metarhyolites, and basalts, which are intruded by the Neo‐Proterozoic Bonaward granitoid complex (ca. 550 Ma based on zircon U–Pb dating; Monazami Bagherzadeh et al, ). The Cambrian Soltanieh dolomites and recrystallised limestones unconformably lie on the Taknar Fm (Eftekhar‐Nezhad et al, ; Ghaemi & Mussavi Herami, ; Shahrabi et al, ).…”

Section: Stratigraphy Of the Doruneh Fault Regionmentioning

confidence: 99%

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The long‐term evolution of the Doruneh Fault region (Central Iran): A key to understanding the spatio‐temporal tectonic evolution in the hinterland of the Zagros convergence zone

et al. 2018

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A better understanding of intraplate deformation requires the knowledge of the space–time scales involved in its development and to decipher possible links with the dynamic evolution of the plate boundaries. Central Iran provides an ideal test site to approach this scientific issue, since it is characterised by a prolonged history of Mesozoic–Cenozoic intraplate deformation that has been interfering with the spatio‐temporal re‐organization of the Zagros convergence zone along the Eurasia plate boundary. This study focus on the Doruneh Fault (DF) region that is considered as the northern mechanical boundary of the Central East Iranian Microcontinent. By combining field investigations with apatite low‐temperature thermochronology, we present a revised tectono‐stratigraphic scenario for the DF region, typified by a punctuated history of fault‐related exhumation, burial and cooling history back to the Upper Cretaceous. When framed at regional scale, these results attest that the Zagros convergence zone, and its hinterland domain were fully mechanically coupled since ca. 40–35 Ma, a time lapse that is here referred as to the onset of continental collision along the Arabia–Eurasia plate boundary. In this scenario, the DF region operated throughout the Cenozoic as a major zone of residual stress accommodation and transfer in the hinterland domain of the Zagros convergence zone. Results of this study also suggest that the tectonic evolution along the Arabia–Eurasia plate boundary was modulated by the plate‐boundary dynamics and by the modes of tectonic reactivation of the intracontinental weak zones of Central Iran and at its tectonic boundaries.

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Section: Thermochronologymentioning

confidence: 99%

Section: Stratigraphy Of the Doruneh Fault Regionmentioning

confidence: 99%

The long‐term evolution of the Doruneh Fault region (Central Iran): A key to understanding the spatio‐temporal tectonic evolution in the hinterland of the Zagros convergence zone

et al. 2018

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“…The Chahak granite intruded at 548.3 ± 1.1 Ma and corresponds thus to an intensive period of Cadomian arc magmatism recorded throughout the Central Iranian Terrane and the other fragments of the original Gondwanan active margin (Ramezani and Tucker 2003;Hassanzadeh et al 2008;Badr et al 2013;Bagherzadeh et al 2015;Shafaii Moghadam et al 2015a). The granite intrudes the volcanic -metasedimentary Sibak Complex, which likely formed in earlier magmatic stages of the arc.…”

Section: Neoproterozoic Arc Magmatism and Ordovician Riftingmentioning

confidence: 86%

Ordovician mafic magmatism in an Ediacaran arc complex, Sibak, northeastern Iran: the eastern tip of the Rheic Ocean

et al. 2018

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The assembly of Gondwana in the Ediacaran was concluded by extensive arc magmatism along its northern margin. Extensional events in the early Paleozoic led to rifting and the eventual separation of terranes, which were later assimilated in different continents and orogens. The Sibak area of northeastern Iran records these events, including late Precambrian volcanic-sedimentary processes, metamorphism, and magmatism. A granite at Chahak in the Sibak Complex yields a zircon U–Pb age of 548.3 ± 1.1 Ma, whereas a spatially associated gabbro has an age of 471.1 ± 0.9 Ma. The latter corresponds to the earliest stages of rifting in the nearby Alborz domain, with the deposition of clastic sedimentary sequences, basaltic volcanism, and, as indicated by indirect evidence, coeval granitic plutonism. The Chahak gabbro is thus one of the earliest witnesses of the rifting processes that eventually led to the development of the Rheic Ocean and were indirectly linked to subduction of Iapetus at the Laurentian margin and the early development of the Appalachian orogen.

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“…The regular trends of decreasing Al 2 O 3 , TiO 2 , MgO, CaO, Fe 2 O 3T , and P 2 O 5 with increasing SiO 2 contents suggesting that fractional crystallization played an important role in the petrogenetic process (Matos et al, 2009). Decreases in CaO, TiO 2 and P 2 O 5 with increasing SiO 2 composition are attributed to fractionation of their bearing minerals such as titanite (CaTiSiO 5 ) and apatite (Ca 5 (PO 4 ) 3 (F,Cl,OH)), respectively (Thuy et al, 2004;Bagherzadeh et al, 2015). Moreover, the depletion in MgO and Fe tot content toward magma evolution indicates a separation of mafic minerals such as biotite during crystallization (Yanbo & Jingwen, 2010).…”

Section: Magmatic Differentiation Of the High-k Calcalkaline Seriesmentioning

confidence: 99%

“…The Sr negative anomaly can be explained by plagioclase fractionation whereas P negative anomaly might be related to apatite fractionation. The Ti and Nb negative anomalies are typical of all types of calc-alkaline magmas and may be explained by residual hornblende and/or Fe-Ti oxides (rutile, ilmenite) in the source of the parental magmas (Bagherzadeh et al, 2015) as shown in Figure 8a. The large ion lithophile elements (LILE), such as Cs, Rb, and Ba are enriched in the Lagoi granite with abundance >100 times of primitive mantle.…”

Section: Magmatic Differentiation Of the High-k Calcalkaline Seriesmentioning

confidence: 99%

Petrography and geochemistry of the Pinkish Lagoi Granite, Bintan Island: Implication to magmatic differentiation, classification, and tectonic history

Irzon¹,

Syafri²,

Ghani³

et al. 2020

BGSM

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The combination of geochemistry and petrography analysis is useful in describing the source, evolution, type, and tectonic of granitoids. The closure of Palaeo-Tethys and the collision between Sibumasu and East Malaya are related to granitic magmatism in Southeast Asia which is classified into East Province, Main Range, and West Province with different characteristics. This study tries to characterize the magmatic differentiation, alphabetic classification, and tectonic history of Lagoi granite which is situated on the Eastern Granite Province in Southeast Asia based on the petrography and geochemistry analysis. Eight granitoid samples have been collected from Lagoi area and analyzed for both petrology and geochemistry using a polarized microscope, XRF, and ICP-MS. Petrographically, the granite consists of quartz, alkali feldspar, biotite, hornblende, and plagioclase. The pinkish Lagoi granite ranges from granodiorite to granite and shows metaluminous character. Seven of the samples are classified in high-K calc-alkaline series, whereas the other one is shoshonitic. The SiO 2 content of high-K calc-alkaline group depicts very good negative correlation to TiO 2 , Al 2 O 3 , Fe 2 O 3T , MnO, CaO, MgO, and P 2 O 5 whilst positive one to K 2 O. Plagioclase reduction during magmatic differentiation is evidenced by Ba and Sr contents, Rb/Sr and CaO/Y ratios, and Eu negative anomaly. The rocks are categorized into I-type in relation to the location relative to Southeast Asia granitic belt, mineral content, and geochemistry composition. The pluton shows syn-collision affinity which formed at the time of Sibumasu and East Malaya collision.

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U–Pb zircon geochronology, petrochemical and Sr–Nd isotopic characteristic of Late Neoproterozoic granitoid of the Bornaward Complex (Bardaskan-NE Iran)

Cited by 37 publications

References 39 publications

The long‐term evolution of the Doruneh Fault region (Central Iran): A key to understanding the spatio‐temporal tectonic evolution in the hinterland of the Zagros convergence zone

The long‐term evolution of the Doruneh Fault region (Central Iran): A key to understanding the spatio‐temporal tectonic evolution in the hinterland of the Zagros convergence zone

Ordovician mafic magmatism in an Ediacaran arc complex, Sibak, northeastern Iran: the eastern tip of the Rheic Ocean

Petrography and geochemistry of the Pinkish Lagoi Granite, Bintan Island: Implication to magmatic differentiation, classification, and tectonic history

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