A crustal source for ca. 165 Ma post-collisional granites related to mineralization in the Jianglang dome of the Songpan-Ganzi Orogen, eastern Tiebtan Plateau

Dai, Yanpei; Zhu, Yu; Li, Tongzhu; Zhang, Huihua; Gaolin, Tang; Zhanwu, Shen

doi:10.1016/j.chemer.2017.10.004

Cited by 15 publications

(28 citation statements)

References 52 publications

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“…The solid yellow rectangles represent the granites from the Zheduo–Gongga Massif. Other colours denote the Rilong/Siguniangshan (orange circles, Dai, Sun, Zhang, & Li, 2011; de Sigoyer et al, 2014; Zhao et al, 2007), Nyanbaoyeche (purple triangles, Zhang et al, 2007), and Wulaxi A‐type granites (green crosses, Dai et al, 2017; Zhou et al, 2014) in the Songpan–Ganze Terrane (Colour figure is available online) [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Resultsmentioning

confidence: 99%

“…In contrast, the Nyanbaoyeche and Siguniangshan granitic plutons formed in an extensional regime related to lithospheric mantle delamination (Dai et al, 2011; de Sigoyer et al, 2014; Roger et al, 2004; Zhang et al, 2007; Zhao et al, 2007; Zhou et al, 2014). In addition, the Zheduo–Gongga granitic pluton differs from the Wulaxi A‐type granitic pluton; in that, it occurred on a flank of the Jianglang dome, and was emplaced through lithospheric doming during an extensional regime (Dai et al, 2017; Li, Dai, et al, 2016; Zhou et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

“…Since then, the SGT has been reworked by subsequent tectonic events, especially the Cenozoic Himalayan Orogeny (de Sigoyer, Vanderhaeghe, Duchêne, & Billerot, 2014; Roger, Jolivet, & Malavieille, 2010; Xu, Hou, & Wang, 1992; Yin & Harrison, 2000). All of the events have been recorded by the region's geological structures (e.g., the Anymaqen–Kunlun and Jinsha sutures and the folds and faults in the strongly deformed and metamorphosed Triassic flysch) and numerous igneous massifs within the SGT (e.g., Cai, Zhang, Xu, Shi, & Zhang, 2010; Chen et al, 2017; Dai et al, 2017; Lai & Zhao, 2015, 2018; Li & Zhang, 2013; Li, Zhang, Zhang, Dong, & Zhu, 2015; Li, Zhang, Zhang, & Wang, 2016; Liu, Zhang, Jin, & Zhang, 2006; Roger et al, 1995; Roger, Malavieille, Leloup, Calassou, & Xu, 2004; Searle et al, 2016; Wang, Zhou, Li, & Yan, 2011; Wu et al, 2016; Xiao et al, 2007; Yuan et al, 2010; Zhang et al, 2007; Zhang, Zhang, Harris, Jin, & Yuan, 2006). The igneous rocks record the deep processes within the lithosphere and, therefore, they provide an opportunity to study the continental growth and dynamic setting of the SGT and its basement affinity.…”

Section: Introductionmentioning

confidence: 99%

“…The igneous rocks record the deep processes within the lithosphere and, therefore, they provide an opportunity to study the continental growth and dynamic setting of the SGT and its basement affinity. The recognized I-type (e.g., the Taiyanghe, Tagong, and Sanyanlong granites) (Chen et al, 2017;Dai et al, 2017;de Sigoyer et al, 2014;Lai & Zhao, 2015;Yuan et al, 2010;Yuan, Xiao, Wan, & Gao, 2011;Zhou, Tang, Gong, Zhu, & Luo, 2014), S-type (the Markamand Manaigranites) (de Sigoyer et al, 2014;Roger et al, 2004), and A-type (the Nyanbaoyeche, Rilong/Siguniangshan and Wulaxigranites) (de Sigoyer et al, 2014;Li, Dai, Ma & Zhou, 2016;Roger et al, 2004;Zhang et al, 2007;Zhou et al, 2014) granitoids cluster in the range of 225-185 Ma and have been interpreted to have formed in the post-collisional (Chen et al, 2017;Dai et al, 2017;Xiao et al, 2007;Zhang et al, 2007;Zhang, Zhang, Harris, Jin, & Yuan, 2006), arc-continental collision accompanied by lithospheric fracturing and extension (Yuan et al, 2010), or subduction-collision with rollback (de Sigoyer et al, 2014). Nevertheless, few of them are related with faulting.…”

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confidence: 99%

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Jurassic post‐collisional extension in the Songpan–Ganze Terrane, eastern Tibetan Plateau: Evidence from weakly peraluminous A‐type granites within the Zheduo–Gongga Massif

Cao

et al. 2020

Geological Journal

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The Mesozoic-Cenozoic Zheduo-Gongga Massif, eastern Songpan-Ganze Terrane, can provide important clues for the crustal evolution in response to syn-and postorogeny. Here, we document petrological and geochemical characteristics of Early Jurassic granites (181.0 ± 2.2 Ma) within the massif along the Xianshuihe Fault in the eastern Tibetan Plateau. The granites have high contents of SiO 2 , Na 2 O + K 2 O, FeO T /MgO, 10,000 × Ga/Al, REE (except Eu) and HFSE (e.g., Nb, Ta, Zr, Hf ), low CaO, TiO 2 , P 2 O 5 and negative Eu, Sr, and Ba anomalies. Zircon REE shows a similar pattern with the whole-rock REE. Our new data demonstrate weakly peraluminous A-type affinity with A/CNK >1.0 and alkali-calcic, ferroan features. Zircon saturation temperatures and geochemical features (e.g., high SiO 2 and low MgO contents, high Rb/Ba and Rb/Sr ratios) indicate that the granites resulted from high-temperature (>800 C) partial melting of Triassic flysch rocks in relatively shallow crust (<500 MPa or <20 km). Zircon εHf(t) values range from 0.55 to 2.91 and the corresponding twostage T DM C are older than the neighbouring Kangding complex and Yangtze margin,implying possible contribution of mantle materials to the parent magma. Considering the tectonic events and the regional geology, the magma was generated in a postcollisional setting, which was possibly driven by the upwelling of hot mid-lower crustal materials due to the break-off of subducted Palaeo-Tethys Ocean slab. Under this situation, the magma may move upwardly into the pre-existing Xianshuihe Fault during the post-collisional extension of the thickened crust. Thus, slab break-off played a key role in the genesis of the Zheduo-Gongga Massif studied herein.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Jurassic post‐collisional extension in the Songpan–Ganze Terrane, eastern Tibetan Plateau: Evidence from weakly peraluminous A‐type granites within the Zheduo–Gongga Massif

Cao

et al. 2020

Geological Journal

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“…1b). Previous laser ablationinductively coupled plasma-mass spectrometry (LA-ICP-MS) zircon U-Pb dating indicates their emplacement ages of 164.5 ± 0.9 Ma and 164.3 ± 1.7 Ma, respectively (Dai et al 2017). The Wulaxi tungsten deposit within the Permian strata is close to the above two granitic plutons (Fig.…”

Section: Geological Settingmentioning

confidence: 87%

Geochemical and isotopic compositions of Late Permian metavolcano–sedimentary sequence in the southern Songpan–Ganzi Orogen, eastern Tibetan Plateau

et al. 2020

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The Permian metavolcano–sedimentary sequence of the Jianglang and Taka domes in the southern Songpan–Ganzi Orogen is composed of bedded marble and sandwiched metabasalt. This study presents geochemistry, C–O–Nd isotope systematics and zircon U–Pb geochronology data to explore the formation mechanism and tectonic setting of its protolith. The marble samples have high δ13CV-PDB (4.0 ‰ to −0.1 ‰) and δ18OV-SMOW (16.3 ‰ to 13.6 ‰) values, with similar εNd(t) values (−5.3 to −7.2) to Late Permian conodonts. They display seawater-like features, e.g. superchondritic Y/Ho ratios, negative Ce and positive La, Gd and Y anomalies, indicating a marine carbonate protolith in oxygen-rich palaeoseawater. Their pronounced positive Eu anomalies suggest a contribution (5 % to 1 %) of submarine high-T hydrothermal fluids. The metabasalt samples show low SiO2, high Fe2O3T and MgO contents. They have low La/Sm, (Th/Ta)PM and (La/Nb)PM ratios, without correlations between MgO and other major/trace elements. These signatures could be attributed to insignificant fractional crystallization and crustal contamination. Their rare earth elements (REE) patterns, trace element profiles and trace element ratios are comparable to those of mid-ocean ridge basalt (MORB), suggesting a depleted MORB-type mantle reservoir. Melt modelling illustrates low degrees (<10 %) of partial melting in the spinel stability field at a depth of 30–60 km. Moreover, the metabasalt contains 2453.7–258.9 Ma detrital zircons significantly related to the Palaeoproterozoic crystalline basement, Rodinia supercontinent, Caledonian events and c. 260 Ma Emeishan large igneous province. Combined with previous studies, we advocate that the investigated metavolcano–sedimentary suquence was most likely formed during the Late Permian in a mature back-arc basin of the Palaeo-Tethys ocean.

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Late Jurassic Wenjiaping high Sr/Y granite: A product of partial melting of the Precambrian basement rocks trigged by lithospheric extension in the Songpan–Garzê fold belt, SW China

Liu

Zhou

et al. 2022

Geological Journal

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The Wenjiaping granite, as one of the few Late Jurassic granites in the Songpan-Garzê fold belt (SGFB), can provide an important clue for comprehensively recognizing the tectonic evolution and mineralization of this belt. In this contribution, we present new age and geochemical data for this pluton to better constrain its petrogenesis and discuss the tectonic and metallogenic implications. LA-ICP-MS zircon U-Pb dating shows that the Wenjiaping pluton was emplaced at ~159 Ma. The granite contains minor amphibole, and exhibits slightly peraluminous characteristics (A/CNK = 1.03-1.10) and lower initial Sr-Pb isotope ratios than those of the Liwu Group, which excludes the possibility that the Wenjiaping granite was derived from partial melting of the metasedimentary rock-dominated Liwu Group as previously suggested. Significantly, high Sr/Y (40.93-54.30), La N /Yb N (39.64-56.64), and K 2 O/ NaO (0.77-1.11) ratios, low MgO (0.47%-0.86%) and Cr (25.1-41.3 ppm) contents, and relatively enriched Sr-Nd-Pb-Hf isotope compositions of the Wenjiaping granite are comparable to those of the Late Triassic adakitic rocks in the SGFB, indicating that they probably share a similar source. Combined with previous researches, we propose that large-scale detachment of the Jianglang dome caused by post-collisional lithospheric extension in the SGFB-induced decompressional partial melting of the Precambrian basement rocks can account for the generation of the Late Jurassic Wenjiaping pluton. In addition, our results also suggest that the Wenjiaping pluton probably cannot supply abundant metal elements for the Liwu-type Cu-polymetallic deposits in the Jianglang dome, SGFB.

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A crustal source for ca. 165 Ma post-collisional granites related to mineralization in the Jianglang dome of the Songpan-Ganzi Orogen, eastern Tiebtan Plateau

Cited by 15 publications

References 52 publications

Jurassic post‐collisional extension in the Songpan–Ganze Terrane, eastern Tibetan Plateau: Evidence from weakly peraluminous A‐type granites within the Zheduo–Gongga Massif

Jurassic post‐collisional extension in the Songpan–Ganze Terrane, eastern Tibetan Plateau: Evidence from weakly peraluminous A‐type granites within the Zheduo–Gongga Massif

Geochemical and isotopic compositions of Late Permian metavolcano–sedimentary sequence in the southern Songpan–Ganzi Orogen, eastern Tibetan Plateau

Late Jurassic Wenjiaping high Sr/Y granite: A product of partial melting of the Precambrian basement rocks trigged by lithospheric extension in the Songpan–Garzê fold belt, SW China

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