Halogen geochemistry of I- and A-type granites from Jiuhuashan region (South China): Insights into the elevated fluorine in A-type granite

Wang, Lian-Xun; Ma, Changqian; Zhang, Chao; Zhu, Yu-Xiang; Marks, Michael A.W.

doi:10.1016/j.chemgeo.2017.09.033

Cited by 80 publications

(19 citation statements)

References 105 publications

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“…Three petro‐tectonic models have been proposed for the Late Mesozoic magmatism in the EJO including: (a) post‐collisional extension setting, related to the underplating of mantle‐derived magmas and the subsequent lithospheric thinning (Su et al, 2013); (b) tectonic transformation caused the regional tectonic change from the compression to the extension (Weng et al, 2011; Zhang et al, 2017); (c) subduction of the Palaeo‐Pacific Plate (Fan et al, 2016; Jiang et al, 2018; Li et al, 2012; Ling et al, 2009; Wang et al, 2018; Wu et al, 2012). The granodiorites, monzogranites, and the alkali‐feldspar granites in the EJO exhibit low Mg # values (<0.40), relatively high Sr/Y ratios, high ε Nd ( t ) and young Hf model ages relative to the adakitic rocks in the east of the Tan‐Lu Fault, which are characterized as high MgO, Al 2 O 3 , Sr contents and high Sr/Y and La/Yb ratios, with adakitic affinity (Su et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Petrogenesis of the Late Jurassic to Early Cretaceous granites in the Taiping–Huangshan area, north‐eastern Yangtze Block, China

et al. 2022

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Yanshanian magmatisms are intensive in the eastern Jiangnan orogen and can be divided into early (150–136 Ma) and late (136–120 Ma) stages. About these granitic rocks, the petrogenesis and associated tectonic setting are still hotly debated. The Taiping–Huangshan complex, a representative granitic rock in this region, is selected to perform geochemical studies. Three lithologic units have been identified in the Taiping–Huangshan complex: granodiorite, monzogranite, and alkali‐feldspar granite with zircon U–Pb dating results of 149–144 Ma, 148 Ma, and 135–131 Ma, respectively, belonging to the early stage for the granodiorite and monzogranite, and late stage for the alkali‐feldspar granite. The granodiorite and monzogranite have similar major and trace element characteristics with intermediate‐acidic SiO2 contents ranging from 65.9 to 69.7 wt.%, low Mg# values of 35.8–38.4, enriched LREE, Pb, Th, and U contents, and weak Eu anomalies (δEu = 0.71–0.79). The alkali‐feldspar granite is characterized by high SiO2 contents (73.3–76.6 wt.%), low Mg# (2.6–10.0), enriched Th, U, Ta, Pb, and Nd, depleted high‐field‐strength elements, and pronounced negative Eu anomalies (δEu = 0.01–0.19). The granodiorite and monzogranite have consistent εHf(t) (−5.38 to −9.41) and δ18O (7.18‰ to 11.00‰) values, while the alkali‐feldspar granite has elevated εHf(t) values (−0.96 to −6.48) and δ18O values (6.27‰ to 8.34‰). Integrated geochemical characteristics and batch partial melting modelling constrain that the early stage granitic rocks derived from ca. 8% batch melting of the Neoproterozoic juvenile crust, and the late‐stage granites derived from a similar crust source with a little contribution from mantle. From early to late stage, the tectonic setting translated from post‐orogenic to anorogenic and the later corresponded to a back‐arc extensional setting as increasing of the slab subducted angle of the Palaeo‐Pacific Plate.

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Section: Discussionmentioning

confidence: 99%

Petrogenesis of the Late Jurassic to Early Cretaceous granites in the Taiping–Huangshan area, north‐eastern Yangtze Block, China

et al. 2022

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“…Rock powders of 10 samples (7 felsic and 3 mafic rocks) were prepared and their major, minor, trace and rare earth element contents determined in China. Sample preparation and analytical procedures are similar to those presented in [38]. Fresh rock samples were cleaned with deionized water, and subsequently crushed and powdered with an agate mill.…”

Section: Field Work and Analytical Methodsmentioning

confidence: 99%

Petro-Geochemistry, Genesis and Economic Aspect of Syenitic and Mafic Rocks in Mindif Complex, Far North Cameroon, Central Africa

Kanouo¹,

Wang²,

Kouske³

et al. 2019

IJG

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Syenitic and mafic rocks in Mindif Complex (Far North of Cameroon) were surveyed and characterized to classify them, understand their formation history, and assess their economic interest. Syenitic bodies (hololeucocratic microsyenites; mesocratic aplitic quartz-syenite; leucocratic porphyritic quartz-biotite syenite, and leucocratic porphyritic biotite-syenite) are silica-oversaturated to silica-saturated, alkaline, and metaluminous. Hololeucocratic microsyenites are structural oriented rocks, cooled in shallow depth from low trace and REE dry residual alkaline melts. Mesocratic aplitic quartz-syenite also crystallized in shallow depth from a much Ba-rich less dry residual melt. Leucocratic porphyritic quartz-biotite and biotite syenitic stocks represent two different rock types cooled from hydrous-rich melts in deep seated environments. The Mindif syenites probably crystallized in crustal source magmas (with important alkali feldspar accumulation) from partial melting of pre-existing igneous protoliths. Medium to coarse-grained-peraluminous granite found at the edge of pink microsyenitic dykes (in contact with granite host), is probably a crystallized product from magmatic mixture between the intrusive syenitic melt and a melt from partial fusion of the granite host rock. Mafic igneous rocks in Mindif are peridotgabbro and gabbro with different characteristics. Peridotgabbro, alkaline, holomelanocratic, medium-grained and ultrabasic, is an REE and incompatible elements depleted rock crystallized in shallow depth from a more evolved mantle source magma with plagioclase accumulation. Tholeiitic gabbro, melanocratic, and also medium-grained, was

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“…These intrusive magmatic rocks are composed of the Jingde, Langqiao, Qingyang‐Jiuhuashan, and Cheng'an‐Guniujiang complexes and some small stocks that distributed along the Qingshan‐Changgai, Zhangqian‐Fengcun, and Lidongkeng‐Zhangchuan belts. These outcrops are mainly granodiorite, monzonitic granite, and K‐feldspar granite, which formed from 152 to 137 Ma, from 136 to 129 Ma, and from 128 to 122 Ma respectively (Gu, Yang, Deng, Duan, & Liu, 2017; Jiang et al, 2018; Li, Yu, Li, Qiu, & Zhou, 2013; Wang et al, 2011, 2018; Wu et al, 2012; Xie et al, 2012, 2016, 2017; Yan et al, 2017; Zhang et al, 2018; Zhang, Wang, Yang, Sun, & Dai, 2012; Zhou et al, 2013; Zhu, Yang, & Sun, 2015).…”

Section: Geologic Background and Specimen Depictionsmentioning

confidence: 99%

“…This issue is crucial to understanding the evolutionary history of the lithospheric mantle beneath the EJO and even beneath the SCB. The widespread Yanshanian magmatic rocks in the EJO are predominantly granitoids, which can be approximately divided into two subgroups according to their formation ages: Late Jurassic (152–137 Ma) and Early Cretaceous (136–122 Ma; e.g., Gu et al, 2017; Jiang et al, 2018; Wang et al, 2018; Wu et al, 2012; Xie et al, 2012, 2016, 2017; Yan et al, 2017; Zhang et al, 2018). Currently, it is widely accepted that these granitic rocks are genetically related to Mesozoic palaeo‐Pacific Plate subduction, an idea which has been proposed in several different models, including basaltic magma underplating induced by slab subduction (Zhou & Li, 2000), flat‐slab subduction accompanied by break‐off and foundering (Li & Li, 2007), ridge subduction and progressive opening of a slab window (Ling et al, 2009), repetitive advance and retreat of the subducting slab (Jiang et al, 2015), and northwestward subduction with increasingly asymmetric slab‐rollback (Liu, Xu, & Xia, 2016).…”

Section: Geodynamic Implicationsmentioning

confidence: 99%

“…The Early Cretaceous gabbros and basalts in the MLYR usually have typical arc‐like trace element signatures and enriched isotopic characteristics, indicating that their mantle source was modified by either a Late Mesozoic or a Neoproterozoic oceanic slab during subduction (Chen et al, 2014, 2016; Liu et al, 2019; Yan et al, 2005, 2008; Yang et al, 2017). However, different from the above two regions, only a few of the Late Mesozoic mafic‐ultramafic rocks have been found in the eastern Jiangnan Orogen (EJO), and these rocks are predominantly diabasic dikes and altered basalts (Jiang, Zhao, Zhou, Liao, & Jin, 2011; Li et al, 2011; Li, Zhou, et al, 2013; Pan et al, 2018; Wang, Ma, Zhang, Zhu, & Marks, 2018; Yu et al, 2004). Because of the intense alteration and/or crustal assimilation that these mantle‐derived rocks experienced, characteristics of the Late Mesozoic lithospheric mantle under the EJO are not well understood.…”

Section: Introductionmentioning

confidence: 99%

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Petrogenesis of the Late Mesozoic gabbros in the eastern Jiangnan Orogen, South China: Characteristics of the lithospheric mantle

Wang

Yan

et al. 2020

Geological Journal

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As we know, mantle‐derived mafic rocks can be used to effectively trace the nature of the mantle source and constrain the regional tectonic setting and evolution. Recently, a Late Mesozoic mafic intrusive body (Huangmao pluton) has been found in the eastern Jiangnan Orogen (EJO). In this study, we investigate this pluton using petrography, whole‐rock geochemistry, Sr–Nd–Pb isotopes, and geochronology. The Huangmao pluton is primarily composed of a fine‐grained gabbro‐diabase, which is characterized by consistent SiO2, MgO, Fe2O3T, and TiO2 contents. These gabbros exhibit continental crust‐like trace element signatures, i.e., enriched in large‐ion lithophile elements (LILE), Pb, and light rare earth elements (LREE), but depleted in high‐field‐strength elements (HFSE). In addition, the Huangmao gabbros have moderate initial 87Sr/86Sr ratio (0.7065–0.7080) and slightly negative to weakly positive εNd(t) value (−2.06 to +0.84). Finally, U–Pb zircon dating confirms that the Huangmao pluton was emplaced in the Late Jurassic (152.6 ± 3.1 Ma). Through an integrated geochemical analysis, these Late Mesozoic gabbros were genetically originated from an enriched lithospheric mantle source, which formed by a metasomatic reaction between mantle peridotite and sediment‐derived felsic melt. Consequently, the lithologies of the metasomatite were predominantly pyroxenites with a small amount of pyroxene‐rich peridotites. Considering the large distance between the modern trench and the EJO, the flat‐slab subduction and rollback model of the palaeo‐Pacific Plate is the most reasonable interpretation of the geodynamic setting that resulted in Late Mesozoic magmatism in the EJO.

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Halogen geochemistry of I- and A-type granites from Jiuhuashan region (South China): Insights into the elevated fluorine in A-type granite

Cited by 80 publications

References 105 publications

Petrogenesis of the Late Jurassic to Early Cretaceous granites in the Taiping–Huangshan area, north‐eastern Yangtze Block, China

Petrogenesis of the Late Jurassic to Early Cretaceous granites in the Taiping–Huangshan area, north‐eastern Yangtze Block, China

Petro-Geochemistry, Genesis and Economic Aspect of Syenitic and Mafic Rocks in Mindif Complex, Far North Cameroon, Central Africa

Petrogenesis of the Late Mesozoic gabbros in the eastern Jiangnan Orogen, South China: Characteristics of the lithospheric mantle

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