Petrogenesis and tectonic implications of Late Cretaceous highly fractionated I-type granites from the Qiangtang block, central Tibet

He, Haiyang; Li, Yalin; Wang, Chengshan; Han, Zehua; Ma, Pengfei; Xiao, Siqi

doi:10.1016/j.jseaes.2019.02.022

Cited by 27 publications

(10 citation statements)

References 110 publications

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“…He, Li, et al, 2018; H. Y. He et al, 2019; Y. L. Li, He, et al, 2017; W. C. Li, Yu, et al, 2017). Therefore, the post‐collisional process (rollback and break‐off) began in the SW Qiangtang Terrane and gradually migrated to the central and eastern Qiangtang Terrane.…”

Section: Discussionmentioning

confidence: 99%

“…In comparison to the magmatism in the SW Qiangtang Terrane, the magmatism in the central and eastern Qiangtang Terrane lasted from 172 to 74 Ma (H. Y. He et al, 2019; H. Y. He, Li, et al, 2018; Y. L. Li, He, et al, 2017; W. C. Li, Yu, et al, 2017; X. S. Wang et al, 2019; Zhang et al, 2012) and overlap with the time of subduction (174–130 Ma; Zhang et al, 2012) in the SW Qiangtang Terrane (170–130 Ma; X. K. Li, Chen, et al, 2018; X. T. Li, Yan, & Qiu, 2018), while the time of rollback and break‐off are later (100–87 Ma; H. Y.…”

Section: Discussionmentioning

confidence: 99%

“…In comparison to the magmatism in the SW Qiangtang Terrane, the magmatism in the central and eastern Qiangtang Terrane lasted from 172 to 74 Ma (H. Y. He et al, 2019;H. Y.…”

Section: Geodynamic Settingmentioning

confidence: 99%

“…T. Li, Yan, & Qiu, 2018), while the time of rollback and break-off are later (100-87 Ma; H. Y. He, Li, et al, 2018;H. Y.…”

Section: Geodynamic Settingmentioning

confidence: 99%

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Geochemistry of Late Cretaceous granitoids in the Yidun Terrane: Implications for petrogenesis and tectonic evolution in the eastern Tibetan Plateau

et al. 2022

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Handling Editor: L. Tang Granites from the eastern Tibetan Plateau record information about the Tethys evolution. This paper reports a systematic study on the N-S-trending Late Cretaceous granite belt in the Yidun Terrane. The studied rocks are A-type granites and I-type granites with adakitic affinity. From north to south, the studied rocks have intermediate ages and whole-rock geochemistry that shows a transitional composition. The granites from the northern Yidun Terrane were emplaced at 106-90 Ma. They are characterized by high silica (SiO 2 > 70 wt.%) contents, low Mg # (10-38), Eu/Eu*(0.09-0.70), Sr/Y (1-12), and La/Yb (5-21) values and positive to negative εHf(t) (À7.6 to +2.5). In contrasts, granites from the southern Yidun Terrane were emplaced at 87-75 Ma and are intermediate to felsic with SiO 2 < 70 wt.%, and higher Mg # (34-69), Eu/Eu* (0.64-1.01), Sr/Y (16-71), La/Yb (22-41) values, and negative εHf(t) values (À9.1 to À1.3). These features together with the Sr-Nd isotopic compositions show that granites from the northern Yidun Terrane were derived from partial melting of ancient crustal from the Yidun Terrane (Xiuwacu granite), with contributions of mantle-derived components (Queershan and Genie batholiths). Granites from the southern Yidun Terrane likely originated from ancient thickened-crustal source. The increase of Sr/Y and (La/Yb) N ratios from north to south suggests a crustal thickening, which influenced the magmatic process, resulting in the transition of geochemical composition of the studied granites. An eastward migrating arc post-collisional model is proposed for the Lhasa-Qiangtang collision when compared to the eastward younging Late Cretaceous granites in the Qiangtang Terrane. The southward migrating granitic magmatism in the Yidun Terrane was triggered by the eastward migrating rollback of the flat-subducted Bangong-Nujiang oceanic slab beneath the Qiangtang Terrane.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…In comparison to the magmatism in the SW Qiangtang Terrane, the magmatism in the central and eastern Qiangtang Terrane lasted from 172 to 74 Ma (H. Y. He et al, 2019;H. Y.…”

Section: Geodynamic Settingmentioning

confidence: 99%

“…T. Li, Yan, & Qiu, 2018), while the time of rollback and break-off are later (100-87 Ma; H. Y. He, Li, et al, 2018;H. Y.…”

Section: Geodynamic Settingmentioning

confidence: 99%

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Geochemistry of Late Cretaceous granitoids in the Yidun Terrane: Implications for petrogenesis and tectonic evolution in the eastern Tibetan Plateau

et al. 2022

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“…The petrogenesis and magma evolution of I-type melts include: (1) magmatic mixing of mantle-derived basaltic and crust-derived felsic melts [66][67][68]; (2) assimilation and fractional crystallization (AFC) of mantle-derived melts [69,70]; and (3) partial melting of metamorphosed mafic-intermediate rocks in the crust [71][72][73]. The εHf(t) values of granitoids formed by magmatic mixing usually vary from negative to positive [74], while the εHf(t) values of the Tongshanling granodiorites do not vary, indicating that the melts were not formed by magmatic mixing.…”

Section: Magma Generation and Evolution Of The Granitoidsmentioning

confidence: 99%

Geochronology, Whole-Rock Geochemistry, and Sr–Nd–Hf Isotopes of Granitoids in the Tongshanling Ore Field, South China: Insights into Cu and W Metallogenic Specificity

et al. 2022

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The Qin-Hang Metallogenic Belt (QHMB), an important metallogenic belt in South China, hosts Cu and W–Sn polymetallic deposits. The Tongshanling ore field in the QHMB is characterized by the coexistence of Cu- and W-bearing polymetallic deposits, which are related to granodiorite and granite porphyry. This study examined whole-rock geochemistry, geochronology, and Sr–Nd–Hf isotopes to determine the genetic relationship between diverse ore-related granitoids (i.e., granodiorite and granite porphyry) and Cu–W metallogeny in the Tongshanling ore field. Zircon LA-ICP-MS U–Pb dating shows that the granodiorite and granite porphyry in the Tongshanling ore field were emplaced at 163.7 ± 0.4 Ma to 154.7 ± 0.6 Ma and 161.1 ± 0.3 Ma, respectively. Geochemically, the granodiorites are classified as oxidized I-type, while the highly evolved granite porphyry is reduced A-type. The Lu–Hf isotopic composition of the granodiorites is characterized by εHf(t) values ranging from –10.49 to –4.99 (average = –7.17), with corresponding TDMC ages ranging from 1524 to 1877 Ma (average = 1682 Ma). In contrast, the granite porphyry has higher εHf(t) values (–3.60 to –1.58, average = –2.78) and younger TDMC (1310–1438 Ma, average = 1387 Ma). The εNd(t) values of granodiorite are −8.06 to −7.37 and the two-stage model ages (TDM2) are 1543–1598 Ma, while the granite porphyry has higher εNd(t) values (−3.0 to −3.4) and younger TDM2 ages (1195–1223 Ma). The results show that the granodiorite and granite porphyry were formed from partial melting of different Mesoproterozoic basement rocks under varying degrees of crust–mantle interaction. Granite porphyry underwent well-recorded fractional crystallization. Compared to the Cu-forming granodiorite, the W-forming granite porphyry has a higher differentiation index, higher crystallization temperatures of zircon (average = 708 °C versus 631 °C), and lower oxygen fugacity (median ΔFMQ = –2.21 versus –1.77).

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Late Triassic granites (ca. 230 Ma) from Cairi area in eastern Qiangtang subterrane, central Tibet: Product of a mid‐oceanic ridge subduction

Wang

et al. 2021

Geological Journal

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Cai et al., 2010) also have ridge subduction. Due to the special structure and shape of ridges, ridge subduction plays an important role in the angle of the subduction slab, the thermal structure of subduction zones, magmatism, and mineralization (Cole & Stewart, 2009;Z. Zhang et al., 2010). Therefore, the identification of ridge subduction in the subduction zone is very important for understanding the tectonic evolution. The Qiangtang terrane in the central Tibet is sandwiched between the Bangong-Nujiang Suture and Jisha Suture. The Shuanghu Suture Zone divided the Qiangtang terrane into eastern Qiangtang and western Qiangtang subterrane, which is the key area for the evolution of the Shuanghu Palaeo-Tethys Ocean (C. Li, Zhai, Wang, Yin, & Mao, 2009). However, there are different opinions about the closing time of Shuanghu Palaeo-Tethys Ocean, including: (a) studies on the high-pressure metamorphic rocks in the central

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Petrogenesis and tectonic implications of Late Cretaceous highly fractionated I-type granites from the Qiangtang block, central Tibet

Cited by 27 publications

References 110 publications

Geochemistry of Late Cretaceous granitoids in the Yidun Terrane: Implications for petrogenesis and tectonic evolution in the eastern Tibetan Plateau

Geochemistry of Late Cretaceous granitoids in the Yidun Terrane: Implications for petrogenesis and tectonic evolution in the eastern Tibetan Plateau

Geochronology, Whole-Rock Geochemistry, and Sr–Nd–Hf Isotopes of Granitoids in the Tongshanling Ore Field, South China: Insights into Cu and W Metallogenic Specificity

Late Triassic granites (ca. 230 Ma) from Cairi area in eastern Qiangtang subterrane, central Tibet: Product of a mid‐oceanic ridge subduction

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