Early Paleozoic high-Mg granodiorite from the Erlangping unit, North Qinling orogen, central China: Partial melting of metasomatic mantle during the initial back-arc opening

Abdallsamed, Mohammed I.M.; Wu, Yuan–Bao; Zhang, Wenxiang; Zhou, Guangyan; Wang, Hao; Yang, Sai-Hong

doi:10.1016/j.lithos.2017.07.016

Cited by 23 publications

(6 citation statements)

References 88 publications

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“…( 87 Sr/ 86 Sr) i versus ε Nd ( t ) diagram showing variations in the composition of the Beilou and Mafan plutons. The Sr–Nd isotopic data for arc‐related plutons within the Qinling Orogen are from Wang et al (2009), Abdallsamed et al (2017) and Ren et al (2018), with data for arc‐related plutons within the Tongbai Orogen from Wang et al (2017). Data for the Fushui complex in the Qinling Orogen are from Wang et al (2014) and Zheng et al (2020), with data for the S‐type Piaochi granite in the Qinling Orogen from Zhang et al (1996), Wang et al (2009), and Qin et al (2014) and data for gneisses of the Qinling Group from Zhang, Liu, and Fu (1994) and Liu, Jahn, et al (2013), Liu, Qi, et al (2013)…”

Section: Analytical Resultsmentioning

confidence: 99%

Geochronology and geochemistry of Beilou granitic pluton: Identification of early Palaeozoic arc magmatic rock in the Dabie Orogen, central China

et al. 2022

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The Dabie Orogen constitutes the eastern part of the Qinling‐Tongbai‐Hong'an‐Dabie orogenic belt, however, whether it has involved into the early Palaeozoic subduction–related event as well‐recorded in the western part is still in debate. This study provides new petrological, geochronological and geochemical data for the Beilou and Mafan plutons in the Dabie‐Hong'an orogens. The Beilou pluton is dominated by granite, some of which have been strongly deformed to form mylonites. The Beilou pluton was emplaced at ca. 490 and ca. 450 Ma, whereas the Mafan pluton was emplaced at 450–430 Ma. The whole‐rock major‐ and trace‐element analyses results indicate that both plutons are depleted in high‐field‐strength elements and heavy rare earth elements. The Beilou pluton also has positive whole‐rock εNd(t) values and generally positive zircon εHf(t) values, whereas all but one of the Mafan pluton samples yield positive whole‐rock εNd(t) and consistently positive zircon εHf(t) values. All of the samples have low (87Sr/86Sr)i ratios. These data indicate that these plutons are formed from magmas generated by the partial melting of metasomatized mantle wedge material with minor additions of crustal materials, representing arc magmatic rocks associated with subduction. Detailed detrital zircon dating of flysch sequences of the Foziling Group within the Dabie Orogen indicates that the early Palaeozoic magmatic rocks had once been distributed in the whole Orogen, although only the Beilou pluton now is exposed in the western Dabie Orogen.

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Section: Analytical Resultsmentioning

confidence: 99%

Geochronology and geochemistry of Beilou granitic pluton: Identification of early Palaeozoic arc magmatic rock in the Dabie Orogen, central China

et al. 2022

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“…The age of granites in Xingshuping deposit has not been studied before. The zircon grains extracted from the biotite granite samples show morphological and geochemical features of a magmatic origin [62]. LA-ICP-MS U-Pb zircon ages suggest the 206 Pb/ 238 U age of 445.46 ± 0.96 Ma represent the emplacement timing of biotite granites.…”

Section: Age Of the Intrusionmentioning

confidence: 88%

Early Paleozoic Adakitic Granitoids from the Xingshuping Gold Deposit of East Qinling, China: Petrogenesis and Tectonic Significance

Zan

Chen

et al. 2021

Minerals

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This study discussed the pertrological classification, geochronology, petrogenesis and tectonic evolution of early Paleozoic granites from the Xingshuping gold deposit in the East Qinling orogenic belt. In order to achieve this target, we carried out an integrated study of zircon U–Pb age, whole-rock major and trace elements, as well as Sr–Nd–Hf isotope compositions for the Xingshuping granites (part of the Wuduoshan pluton) from the Erlangping unit. Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) zircon U–Pb dating constrains the emplacement age of the Xingshuping granites at 446.2 ± 1.2 Ma. The rocks at Xingshuping can be divided into two types: mainly biotite granite and monzonitic granite. The biotite granites are typical adakitic rocks, while the monzonitic granites show characteristics similar to normal arc volcanic rocks. The geochemical compositions reveal that they were derived from a clay-rich, plagioclase-rich and biotite-rich psammitic lower continental crust source, with contributions of mantle-derived magmas. The distinction is that the biotite granites were primarily derived from partial melting in a syn-collision extension setting, whereas the monzonitic granite went through a fractional crystallization process in an intraplate anorogenic setting.

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“…Back‐arc extension can be driven mainly by the rollback of the subducting slab or by the absolute motion of the overriding plate (Cocchi et al, ; Sdrolias & Müller, ). In the NQ orogen, the northward subduction of the Proto‐Tethyan oceanic crust along the southern margin of the NQ unit induced the formation of an Andean‐type arc (Abdallsamed et al, ; Wang et al, , ). The arc magmatic activities occurred at ca.…”

Section: Discussionmentioning

confidence: 99%

“…The formation of ca. 440 Ma high‐Mg granodiorites in the Erlangping unit was also suggested to relate to the initial opening of the Erlangping back‐arc basin as a tectonic response to the slab rollback of the subducting Proto‐Tethyan Ocean (Abdallsamed et al, ).…”

Section: Discussionmentioning

confidence: 99%

Timing of the Erlangping back‐arc basin in the Qinling orogen, central China and its tectonic significance

Zhang

et al. 2019

Terra Nova

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Back-arc basins hold the key in understanding the geodynamics of orogenic processes. The Qinling-Dabie orogenic belt in central China is one of the most important orogenic belts constraining the tectonic framework of eastern Asia. However, its Palaeozoic accretionary processes remain equivocal, mainly derived from the age uncertainty of the back-arc basin in the Qinling orogen. We carried out zircon U-Pb geochronology for two pyroclastic volcanic rocks intercalated within the Erlangping back-arc basin basalts. They yield U-Pb ages of 435.8 ± 4.2 Ma and 435.7 ± 3.8 Ma, which precisely constrain the timing of the back-arc basin opening. The opening of the Erlangping back-arc basin might have been triggered by the rollback of the Proto-Tethyan oceanic slab due to the southward migration of arc magmatism at ca. 440 Ma. The Palaeozoic tectonic evolution and orogen-scale geodynamic processes of the Qinling orogen are thus reconstructed. S U PP O RTI N G I N FO R M ATI O N Additional supporting information may be found online in the Supporting Information section at the end of the article. Appendix. SIMS zircon U-Pb results and analytical methods for volcanic tuffs performed by a Cameca IMS-1280 secondary ion mass spectrometer (SIMS) at the Institute of Geology and Geophysics, Chinese Academy of Sciences (IGGCAS), Beijing, China; Wholerock geochemistry determined by Shimadzu sequential X-ray fluorescence spectrometer (XRF) and inductively coupled plasma mass spectrometry (ICP-MS) at the State

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Early Paleozoic high-Mg granodiorite from the Erlangping unit, North Qinling orogen, central China: Partial melting of metasomatic mantle during the initial back-arc opening

Cited by 23 publications

References 88 publications

Geochronology and geochemistry of Beilou granitic pluton: Identification of early Palaeozoic arc magmatic rock in the Dabie Orogen, central China

Geochronology and geochemistry of Beilou granitic pluton: Identification of early Palaeozoic arc magmatic rock in the Dabie Orogen, central China

Early Paleozoic Adakitic Granitoids from the Xingshuping Gold Deposit of East Qinling, China: Petrogenesis and Tectonic Significance

Timing of the Erlangping back‐arc basin in the Qinling orogen, central China and its tectonic significance

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