Petrological and Sr–Nd–Os isotopic constraints on the origin of the Fanshan ultrapotassic complex from the North China Craton

Niu, Xiongwei; Chen, Bin; Liu, Ankun; Suzuki, Katsuhiko; Ma, Xu

doi:10.1016/j.lithos.2012.05.017

Cited by 40 publications

(24 citation statements)

References 83 publications

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“…The Al IV /Al VI ratio of clinopyroxenes increases with decreasing pressure values in a variety of petrological environments [62,72,73]. The Al IV /Al VI ratios of the clinopyroxenes in this study are relatively high and vary from 5.1 to 105.71, with an average of 19.36 [71,[74][75][76][77][78]. The high Al IV /Al VI ratios (5.1-105.71) of clinopyroxenes from Well CK-2 suggest relatively low-pressure environments for crystallization [62].…”

Section: The Nature Of Parental Magmamentioning

confidence: 57%

LA-ICP-MS Analysis of Clinopyroxenes in Basaltic Pyroclastic Rocks from the Xisha Islands, Northwestern South China Sea

Zhang

Qian

2018

Minerals

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Cenozoic volcanic rocks were recently discovered during full-coring kilometer-scale major scientific drilling in the Xisha Islands, northwestern South China Sea. A systematic mineralogical study of these samples was performed for this paper. The results show that the volcanic rock samples are basaltic pyroclastic. The major elements demonstrate that the clinopyroxenes are diopside and fassaite, which contain high Al 2 O 3 (5.33-11.2 wt. %), TiO 2 (2.13-4.78 wt. %) and wt. %). Clinopyroxenes have high REE abundances (104-215 ppm) and are strongly enriched in LREE (LREE/HREE = 3.56-5.14, La/Yb N = 2.61-5.1). Large-ion lithophile elements show depleted characteristics. Nb/Ta shows obvious fractionation features: Nb is lightly enriched, relative to primitive mantle, but Ta is heavily depleted, relative to primitive mantle. The parental magma of the basaltic pyroclastic rocks belongs to a silica-undersaturated alkaline series, characterized by a high temperature, low pressure, and low oxygen fugacity. The Al IV content increases with decreasing Si concentration. The Si-unsaturated state causes Si-Al isomorphic replacement during the formation of clinopyroxene. The electric charge imbalance caused by the replacement of Si by Al is mainly compensated by Fe 3+ . The clinopyroxene discrimination diagrams show that the parental magma formed in an intraplate tectonic setting environment.The mineral composition of igneous rocks depends on the chemical composition and crystallization environment of magma. Changes in mineral composition and structure are direct evidence of changes in the diagenetic environment and material composition. Therefore, the characteristics of mineral composition can be used to explore mineral petrogenesis and the magma evolution mechanism [18]. Clinopyroxene is one of the main rock-forming minerals of mafic-ultramafic rocks and plays a major role in the generation and subsequent differentiation of magma [16,[19][20][21][22][23][24]. Clinopyroxene composition mainly depends on primary magma characteristics, the crystallization environment, and the tectonic setting of magmatism [25][26][27][28][29][30][31][32]. Relative to other minerals in mafic-ultramafic rocks, clinopyroxene is considered to be the main carrier for most trace elements and holds a unique further record of magma history [33,34]. The mineral chemistry of relict clinopyroxene in igneous rocks can reflect the characteristics of the primary magma well and has been widely used to study the nature of the original magma and complicated processes that have affected the lithospheric mantle [21,[35][36][37][38][39][40][41][42]. Furthermore, clinopyroxenes in altered basalts are of interest, because they often survive in a relatively pristine form, after the matrix and other minerals have been converted to secondary minerals. The major-and minor-element geochemistry of clinopyroxene is varied and provides a filtered view of the composition of the magma from which the clinopyroxene crystallized, lending it the potential to provide insight into t...

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Section: The Nature Of Parental Magmamentioning

confidence: 57%

LA-ICP-MS Analysis of Clinopyroxenes in Basaltic Pyroclastic Rocks from the Xisha Islands, Northwestern South China Sea

Zhang

Qian

2018

Minerals

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“…Russell et al (1999) discussed the magmatogene Ti-rich demantoid of the Canadian Cordillera. Niu et al (2012) further discussed the substitution relationship between Ti, Ca and Fe elements in Ti-rich demantoid, and concluded that the relationships are consistent with the magmatogene Ti-rich demantoid mentioned by Russell et al (1999) and magma derivation from the enriched lithospheric mantle.…”

Section: Characteristics and Formation Environment Of The Parent Magmmentioning

confidence: 61%

Melilite-derived mineral inclusions in chromite from the Gaositai complex: Implications for an extensional tectonic setting in Early Permian at the north North China Craton

Shao

Tian

Wei

et al. 2015

Sci. China Earth Sci.

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The Early Permian mafic-ultramafic concentrically zoned Gaositai intrusion at Chengde, on the northern margin of the North China Craton (NCC), is a cumulative complex emplaced along a giant fracture that penetrates deeply into the continental lithosphere. Melt inclusions are present in chromite crystals from the inner dunite and chromitite zones of the Gaositai complex. The melt inclusions have experienced post-trap crystallization and resulted in multiple mineral phases, including melilite, garnet, phlogopite, magnesite and apatite, which can indicate the liquidus minerals of the primitive magma. The characteristics of the melilite+melanite+clinopyxene assemblage indicate that the primary parental magma was highly undersaturated and derived from an alkali-rich mantle source. The crystallization of phlogopite, magnesite and apatite suggests a primary magma rich in K, H 2 O and CO 2 . When compared with experimental data, the primary magma of the Gaositai intrusion is concordant with a kamafugite magma originating from partial melting of enriched mantle with H 2 O and CO 2 at pressures greater than 2.7 GPa. This magmatic process would have been related to extensional thinning of the continental lithosphere. The Gaositai primary magmas have high Nb/La ratios, which are similar to those of ocean island basalts, but different from arc-related magmas. This suggests that the northern margin of the NCC was not an active continental margin of the Paleo-Asian Ocean subduction zone during the Early Permian: an extensional tectonic setting during the emplacement of the Gaositai intrusion is more likely. Citation:Shao J A, Tian W, Wei C J, Zhu W P. 2016. Melilite-derived mineral inclusions in chromite from the Gaositai complex: Implications for an extensional tectonic setting in

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“…P, Peridotgabbro; G1, Subalkalic gabbro; G2, Alkalic gabbro; D1, Gabbroic diorite; D2, Diorite; D3, Granodiorite; Gr, Granite; Q, Quartzolite; M1, Monzogabbro; M2, Monzodiorite; M3, Monzonite; S, Syenite; QM, Quartz monzonite; F, Foidolite; F1, Foid gabbro; F2, Foid Monzodiorite; F3, Foid monzosyenite; F4, Foid syenite; The boundary between alkaline and subalkaline series is after Irvine and Baragar, 1971. Data sources: a part of data of the Jiefangyingzi granodiorite from ; Alkaline series rocks from Jiang et al, 2004;Cai et al, 2011;Niu et al, 2012Niu et al, , 2016Yang et al, 2012b;Chen et al, 2013;Wu et al, 2016;Zhu et al, 2016; Weak alkaline-sub-alkaline series rocks from Han et al, 2000;Han et al, 2004;Pei et al, 2008;Yang et al, 2012a, b;Wang et al, 2015;Liu et al, 2016;Xiong et al, 2017; Xiaozhangjiakou maficultramafic complex from ; Ningcheng pyroxenite from similar to those of the rocks of the Jiefangyingzi pluton, except for the lower contents of ΣREE (61.19-64.69 ppm) and the HFSEs of Nb, Ta, Zr and Hf (Fig. 9c, d).…”

Section: Granodiorite Porphyrymentioning

confidence: 99%

“…87 Sr/ 86 Sr-ε Nd (t) diagram (after Zindler and Hart, 1986) of different rock in the Jiefangyingzi pluton and other Mid-Late Triassic magmatism on north margin of the NCC. The two end-members of B (Juvenile components of basalt) and LCC (Lower continental crust) are from Wu et al, 2000. Data sources: Alkaline series rocks from Mu et al, 2001;Niu et al, 2012Niu et al, , 2016Yang et al, 2012b;Chen et al, 2013;Zhu et al, 2016; Weak alkaline-sub-alkaline series rocks from Pei et al, 2008;Yang et al, 2012a, b;Wang et al, 2015;Xiong et al, 2017;; Xiaozhangjiakou mafic-ultramafic complex from ; Ningcheng pyroxenite from . -11 , 147 Sm decay constant λ Sm is 6.54×10 -12 (Steiger and Jä ger, 1977;Lugmair and Marti, 1978); 147 Sm/ 144 Nd and 147 Nd/ 144 Nd of chondrite and depleted mantle (DM) are 0.1967 and 0.512638, and 0.2137 and 0.51315 respectively; I Sr = ( 87 Sr/ 86 Sr) sample -( 87 Rb/ 86 Sr)×(e λt -1), ε Nd =[( 143 Nd/ 144 Nd) sample /( 143 Nd/ 144 Nd) CHUR -1] ×10000; f Sm/Nd =[( 147 Sm/ 144 Nd) sample /( 147 Sm/ 144 Nd) CHUR ] -1 granitic sample TD213 with the lowest ε Nd (t) value of −5.07 are taken as the two end-members of magma mixing, approximately 15-30% mafic and 70-85% granitic components would be needed to generate the Jiefangyingzi granodiorite and porphyry dyke, and approximately 25-40 mafic and 60-75% granitic components would be needed to generate the intermediate enclaves (Fig.…”

Section: Petrogenesis Of the Other Rocks In The Jiefangyingzi Plutonmentioning

confidence: 99%

Destruction of the Northern Margin of the North China Craton in Mid‐Late Triassic: Evidence from Asthenosphere‐derived Mafic Enclaves in the Jiefangyingzi Granitic Pluton from the Chifeng Area, Southern Inner Mongolia

Liu

Xiao-guo

et al. 2020

Acta Geologica Sinica (Eng)

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The petrology, geochronology and geochemistry of the mafic enclaves in the Mid‐Late Triassic Jiefangyingzi pluton from Chifeng area, southern Inner Mongolia, in China are studied to reveal their petrogenetic relationship with the host pluton. Furthermore, the coeval magmatic assemblage and its petrogenesis on the northern margin of the North China craton (NCC) are studied synthetically to elucidate their tectonic setting and the implications for the destruction of the NCC. Zircon U‐Pb dating reveals that the mafic enclaves formed at 230.4 ± 2.2 Ma, which is similar to the age of the host pluton. The most basic mafic enclaves belong to weak alkaline rocks, and they display rare earth element (REE) and trace element normalized patterns and trace element compositions similar to those of ocean island basalt (OIB). In addition, they have positive ∊Nd(t) values (+3.84 to +4.94) similar to those of the Cenozoic basalts on the northern margin of the NCC. All of these geochemical characteristics suggest that the basic mafic rocks originated from the asthenosphere. Petrological and geochemical studies suggest that the Jiefangyingzi pluton and the intermediate mafic enclaves were formed by the mixing of the asthenosphere‐derived and crust‐derived magmas in different degrees. The Mid‐Late Triassic magmatic rocks on the northern margin of the NCC could be classified into three assemblages according to their geochemical compositions: alkaline series, weak alkaline–sub‐alkaline series and sub‐alkaline series rocks. Petrogenetic analyses suggest that the upwelling of the asthenosphere played an important role in the formation of these Mid‐Late Triassic magmatic rocks. Basing on an analysis of regional geological data, we suggest that the northern margin of the NCC underwent destruction due to the upwelling of the asthenosphere during the Mid‐Late Triassic, which was induced by the delamination of the root of the collisional orogeny between Sino‐Korean and Siberian paleoplates in Late Permian.

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Petrological and Sr–Nd–Os isotopic constraints on the origin of the Fanshan ultrapotassic complex from the North China Craton

Cited by 40 publications

References 83 publications

LA-ICP-MS Analysis of Clinopyroxenes in Basaltic Pyroclastic Rocks from the Xisha Islands, Northwestern South China Sea

LA-ICP-MS Analysis of Clinopyroxenes in Basaltic Pyroclastic Rocks from the Xisha Islands, Northwestern South China Sea

Melilite-derived mineral inclusions in chromite from the Gaositai complex: Implications for an extensional tectonic setting in Early Permian at the north North China Craton

Destruction of the Northern Margin of the North China Craton in Mid‐Late Triassic: Evidence from Asthenosphere‐derived Mafic Enclaves in the Jiefangyingzi Granitic Pluton from the Chifeng Area, Southern Inner Mongolia

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