A review of the relationships between granitoid types, their origins and their geodynamic environments

Barbarin, Bernard

doi:10.1016/s0024-4937(98)00085-1

Cited by 1,321 publications

(646 citation statements)

References 71 publications

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“…Accretionary and collisional orogens are important sites for the partial melting of recycled sedimentary rocks to form S-type granites (e.g., Sylvester, 1998;Barbarin, 1999;Collins and Richards, 2008;Kemp et al, 2009). The time interval between the deposition of sedimentary rocks and formation of magmatic rocks can be less than 50 m.y.…”

Section: Introductionmentioning

confidence: 99%

Paleoproterozoic S-type granites in the Helanshan Complex, Khondalite Belt, North China Craton: Implications for rapid sediment recycling during slab break-off

Wei

Wang

et al. 2014

Precambrian Research

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a b s t r a c t S-type granites, typically derived from the rapid recycling of sedimentary rocks, are sometimes accompanied by contemporary mafic magmatism and granulite metamorphism. However, the geodynamic context for such rock suites is often highly disputed, with various model proposed, including back-arc basin opening, lithospheric delamination, mantle plume and continental rifting. The Paleoproterozoic Khondalite Belt in the North China Craton provides an example of synchronous mafic and felsic magmatism that was accompanied by granulite-facies metamorphic events for which the tectonic affinities of these rocks remains unclear. This study integrates in situ zircon Hf-O isotope analyses, whole-rock geochemistry and Nd isotope results for the earliest two-mica granites (ca. 1.95 Ga) in order to provide constraints on the above issues. The granites are strongly peraluminous (A/CNK value >1.1), and characterized by high zircon ␦18 O values of 7.3-10.6‰, corresponding to calculated magmatic ␦ 18 O values of 9.1-12.3‰, similar to those of typical S-type granites. They have relatively high and homogeneous ε Nd (t) values of −1.1 to +0.9 and highly variable zircon ε Hf (t) values ranging from −1.0 to +8.3. In situ zircon Hf-O isotopic compositions indicate that the S-type granites may contain some mantle or juvenile crustal components in addition to a sediment component. Based on the new results and published data, a slab break-off model is proposed to explain the rapid recycling of sedimentary precursors and the generation of the ca. 1.95 Ga S-type granites.

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Section: Introductionmentioning

confidence: 99%

Paleoproterozoic S-type granites in the Helanshan Complex, Khondalite Belt, North China Craton: Implications for rapid sediment recycling during slab break-off

Wei

Wang

et al. 2014

Precambrian Research

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“…These are common features of arc-type igneous rocks. In contrast, the CB granite is rich in K-feldspar, with some muscovite, which is similar to muscovite-bearing peraluminous granitoids [53]. Muscovite-bearing peraluminous granitoids are rich in Si and K, poor in Na, Al, Mg and Ca, and display relative enrichment in HFSE such as Nb, Ga and Y.…”

Section: Origin Of the Monzogranitementioning

confidence: 98%

Zircon U-Pb ages of granites at Changba and Huangzhuguan in western Qinling and implications for source nature

Wang

Sun

et al. 2011

Chin. Sci. Bull.

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Mesozoic granitoids are widespread in the Qinling-Dabie-Sulu orogenic belt. Precise U-Pb dating on these granitoids can reveal the evolution of the continental collision orogen and thus provide information on the nature of magma sources. This study presents zircon LA-ICP-MS U-Pb dating and whole-rock geochemical analyses for two intrusions at Changba and Huangzhuguan in western Qinling. Zircon U-Pb ages for central and marginal phases of the Huangzhuguang intrusion are 214±1 Ma and 213±3 Ma, respectively. Zircons from the Changba intrusion yield a dominant cluster with an U-Pb age of 213±2 Ma. Collectively, these ages are younger than ages of 220 to 240 Ma for ultrahigh-pressure metamorphism due to the continental collision between the South China Block and the North China Block, corresponding to syn-exhumation magmatism. Some inherited zircons occur in the Changba intrusion, yielding a weighted mean of 206 Pb/ 238 U ages at 757±14 Ma. This indicates that the Changba intrusion has the crustal source of mid-Neoproterozoic ages and a tectonic affinity to the South China Block. Geochemically, the two intrusuons are both rich in LILE and LREE but depleted in HFSE and HREE, similar to arc-type igneous rocks. The Huangzhuguang intrusion exhibits linear correlations between SiO 2 and the other major oxides, implying chemical evolution from a cognate magma source. It contains mafic enclaves, suggesting possible mixing of felsic-mafic magmas. The Changba granite is rich in Si and K but poor in Fe and Mg as well as has a high value of Fe*, suggesting strong differentiation of granitic magma. Therefore, the two intrusions were derived from the Late Triassic anatexis of the continental crust of different compositions in the northern margin of South China Block. This process may be coupled with exhumation of the subducted continental crust in the stage of late collision.Qinling orogen, continental collision, granite, zircon U-Pb dating, whole-rock geochemistry, syn-exhumation magmatism Citation:Wang T G, Ni P, Sun W D, et al. Zircon U-Pb ages of granites at Changba and Huangzhuguan in western Qinling and implications for source nature.

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“…On the basis of the Barbarin (1999) classification, quartz-monzonite and monzogranite of the Kamtal Intrusion can be classified as ACG (amphibolebearing calc-alkaline granitoids) and KCG (K-rich calc-alkaline granitoids) granitoids. According to Barbarin (1999) the ACG granitoids were formed in a subduction setting, while the KCG granitoids were formed in a transitional setting during the change from compressional to tensional regime.…”

Section: Tectonic Settingmentioning

confidence: 99%

“…According to Barbarin (1999) the ACG granitoids were formed in a subduction setting, while the KCG granitoids were formed in a transitional setting during the change from compressional to tensional regime. Meinert (1993) suggested that different kinds of skarn deposits (such as Fe, Cu, etc.)…”

Section: Tectonic Settingmentioning

confidence: 99%

Petrology and petrogenesis of Kamtal Intrusion Eastern Azarbaijan, NW Ian

Mokhtari¹,

Moinvaziri²,

Ghorbani³

et al. 2010

Central European Geology

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The Kamtal Intrusion is located in Eastern Azarbaijan province, northwestern Iran, near the Armenian border. This body consists of an acidic part of monzogranitic composition, and an intermediate-basic part which is composed of quartz-monzonite and gabbro. The gabbro forms lenses within the intermediate rocks. Monzogranite has been intruded into the quartz-monzonite. Both monzogranites and quartz-monzonites are high-K calk-alkaline and metaluminous in composition and can be classified as I-type granitoids, while the gabbro has tholeiitic affinity.Monzogranite and quartz-monzonite are characterized by LREE-rich patterns and high LREE/HREE ratios. The similarities of their REE patterns suggest a genetic relationship among these rocks. The geochemical characters of the gabbro types indicate two different patterns: a flat pattern with low LREE/HREE ratio, and a steep pattern with high LREE/HREE ratio. The former was probably produced by high melting ratio of a depleted mantle source, and the steep pattern probably was the result of a low melting ratio of this mantle source. Negative anomalies of Nb and Ti can be seen in all rock types of the Kamtal Intrusion, which is indicative of subduction zones. The comparison of trace element variations with granitoid rocks of different tectonic settings allows observing a similarity between the Kamtal Intrusion and Andean volcanic arc granitoids.The Kamtal body is related to the VAG tectonic setting and was probably produced as a result of Khoy back-arc basin subduction beneath the Azerbaijan continental crust.

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A review of the relationships between granitoid types, their origins and their geodynamic environments

Cited by 1,321 publications

References 71 publications

Paleoproterozoic S-type granites in the Helanshan Complex, Khondalite Belt, North China Craton: Implications for rapid sediment recycling during slab break-off

Paleoproterozoic S-type granites in the Helanshan Complex, Khondalite Belt, North China Craton: Implications for rapid sediment recycling during slab break-off

Zircon U-Pb ages of granites at Changba and Huangzhuguan in western Qinling and implications for source nature

Petrology and petrogenesis of Kamtal Intrusion Eastern Azarbaijan, NW Ian

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