Geochemical Characteristics of Cenozoic Jining Basalts of the Western North China Craton: Evidence for the Role of the Lower Crust, Lithosphere, and Asthenosphere in Petrogenesis

Ho, Kung Suan; Yan, Lei; Chen, Ju Chin; You, Chen Feng; Yang, Huai Jen

doi:10.3319/tao.2010.06.28.01(tt)

Cited by 19 publications

(14 citation statements)

References 45 publications

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“…Ma; Zhang et al, 2005), Miocene (23.521.9 Ma; Chen et al, 2004;Zhao et al, 2013) and Quaternary (1.30.11 Ma;Ho et al, 2011) in Jining area (in the West North China Block) with the aim of understanding their source compositional changes through time, which may reflect lithosphere evolution of the region, and may thus offer new perspectives on the NCC destruction on a greater spatial scale than previously thought.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…Chen et al (2004) first described mantle xenoliths hosted in the Miocene basalts in Siziwang Qi, Inner Mongolia (Fig. 1b), and there have been recent petrological and geochemical studies on these basalts and their hosted crustal and mantle xenoliths (Zhang et al, 2005;Zhang and Han, 2006;Li et al, 2006;Yang et al, 2009;He et al, 2009;Jing et al, 2010;Ho et al, 2011;.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…This volcanic province could be genetically related to other Cenozoic volcanic provinces nearby such as Hannuoba , Chifeng (Han et al, 1999), and Abaga (Ho et al, 2008). The Jining Cenozoic basaltic volcanism spanned a long period from the late Oligocene to the Quaternary (~33~0.1 Ma) as evidenced by K-Ar dating, stratigraphy and paleontology (Luo and Chen, 1990;Chen et al, 2004;Zhang and Han, 2006;Ho et al, 2011;Zhao et al, 2013). considered the eruption mostly occurred in the Miocene.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…1b), ranging in age from early Cretaceous (119.6108.6 Ma; Zhang et al, 2005) to Miocene (23.521.9 Ma; Chen et al, 2004;Zhao et al, 2013) and to Quaternary (1.30.11 Ma; Ho et al, 2011).…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…Alkaline volcanism (spatially scattered) occurred in the Jining area during the early Cretaceous (Zhang et al, 2005;Li et al, 2006), and Zhang et al (2005) suggested that these alkaline basalts are shoshonites. The Cenozoic saw a large scale of volcanic activities (>~8000 km 2 ) in this region, forming the Jining Cenozoic volcanic province (Zhang and Han, 2006;Ho et al, 2011;, which is the westernmost…”

Section: Geological Setting and Samplesmentioning

confidence: 99%

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Lithosphere thinning beneath west North China Craton: Evidence from geochemical and Sr–Nd–Hf isotope compositions of Jining basalts

Guo

Niu

et al. 2014

Lithos

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This study shows lithosphere evolution history in the west North China Craton (NCC) from the early Cretaceous to Quaternary by studying the major element, trace element and Sr-Nd-Hf isotope compositions in Jining basalts of 119.6108.6 Ma, 23.521.9 Ma and 1.30.11 Ma.The early Cretaceous basalts (119.6108.6 Ma) display enriched characteristics with high contents of incompatible elements, high 87 Sr/ 86 Sr i , low ε Nd (t) and low ε Hf (t). These basalts resulted from partial melting of ancient metasomatized lithospheric mantle, and we consider the 119.6108.6 Ma magmatism as indicating lithosphere thinning in the west NCC. Although the Pacific slab seen seismically in the mantle transition zone beneath eastern China is no older than 60 Ma, there exists convincing evidence for the presence of the Paleo-Pacific slab in the transition-zone in the Mesozoic. Thus we propose that the water released from the transition-zone slab hydrated A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPTthe overlying lithosphere and further converted the base of the lithosphere into asthenosphere. This is the most likely mechanism responsible for the lithosphere thinning in the west NCC and the petrogenesis of the Jining 119.6108.6 Ma basalts. Sr i , high ε Nd (t) and high ε Hf (t). Upwelling and decompression melting of the eastward flowing asthenosphere from beneath western plateaus to beneath eastern hilly plains in the Cenozoic is the most plausible mechanism for the petrogenesis of Jining Cenozoic basalts (both of 23.521.9 Ma and 1.30.11 Ma), but the Jining 1.30.11 Ma basalts must have been produced beneath even thinner lithosphere.Taken together geophysical studies and our petrological and geochemical studies of all these three episodes of the Jining basalts, wepropose that the lithosphere in the west NCC has been thinning since the early Cretaceous and the thinning continues to the present.

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Section: Accepted M Manuscriptmentioning

confidence: 99%

Section: Accepted M Manuscriptmentioning

confidence: 99%

Section: Accepted M Manuscriptmentioning

confidence: 99%

Section: Accepted M Manuscriptmentioning

confidence: 99%

Section: Geological Setting and Samplesmentioning

confidence: 99%

See 3 more Smart Citations

Lithosphere thinning beneath west North China Craton: Evidence from geochemical and Sr–Nd–Hf isotope compositions of Jining basalts

Guo

Niu

et al. 2014

Lithos

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Genesis of Cenozoic low‐Ca alkaline basalts in the Nanjing basaltic field, eastern China: The case for mantle xenolith‐magma interaction

Zeng

Chen

et al. 2013

Geochem Geophys Geosyst

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[1] Although peridotite xenoliths are common in alkaline basalts, it is still unclear whether the chemical compositions of their host rocks have been affected by these mantle fragments and, if so, what processes are involved in this alteration of the host basalts. Here, we document a kind of xenolith-rich alkaline basalts from the Nanjing basaltic field, eastern China. These basalts contain lower concentrations of CaO (4.1-7.8 wt %) and Sc (3.3-17.8 ppm) and have lower Ca/Al (0.3-0.6) and higher Na/Ti ratios (2.8-11.2) than other Cenozoic basalts in this area. These xenolith-rich basalts show good correlations between elemental ratios (e.g., Lu/Hf and Ca/Al) and e Hf values, which are indicative of mixing of two distinct components during the genesis of the magmas that formed these basalts: a high-e Hf end-member (with low Lu/Hf and Ca/Al ratios) and the primitive melt-related low-e Hf end-member. In addition, peridotite xenoliths hosted in these basalts have distinct core-mantle textures, with the margins having higher modal olivine abundances (70%) than the xenolith cores (52%). Within the xenolith margins, some orthopyroxenes are enclosed in the olivines, and all clinopyroxenes are sponge textured. These sponge-textured clinopyroxenes have higher CaO and Sc concentrations, higher Ca/Al ratios, and lower Na/Ti ratios than clinopyroxenes within the cores of the xenoliths, suggesting that the xenoliths underwent low-pressure melting within the host magma. This indicates that xenolith-rich magmas within the study area were contaminated during ascent by melts derived from mantle xenoliths within the magmas, transforming the magmas into the low-Ca alkaline basalts.

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Major, trace element, and SrNd isotopic geochemistry of Cenozoic basalts in Central‐North and East Mongolia: Petrogenesis and tectonic implication

et al. 2018

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This paper presents new major element, trace element, and SrNd isotope data of Cenozoic basalts in volcanic provinces Hovsgol, Taatsiin Gol, and Dariganga‐Abaga in Northern, Central, and Eastern Mongolia, respectively, to explore the petrogenesis of the basalts and their geodynamic setting. Cenozoic volcanic rocks in Mongolia are dominated by basalts, belonging to alkaline and tholeiitic series, and are characterized by ocean island basalts (OIB)‐like major and trace element signature, such as enrichment of light REE relative to heavy REE and enrichment in both large‐ion lithophile elements (LILE) and high‐field‐strength elements (HFSE) with positive NbTa anomalies in primitive mantle‐normalized spider diagram. On the other hand, the Central‐North Mongolian basalts are higher in SiO2 and Al2O3 but lower in MgO, CaO, and TiO2 than East Mongolian basalts and display positive K anomaly, which is in contrast to the negative K anomaly of the latter. Despite the evolved nature of the Central‐North Mongolian basalts, the roles of crustal contamination and fractional crystallization, or assimilation coupled with fractional crystallization (AFC), are insignificant in the genesis of the basalt; instead, both the mantle heterogeneity and melting condition have significant contributions to the compositional variations of the basalts. Importantly, the SrNd isotopic signatures suggest that the mantle sources are characterized by mixing of two isotopic components, a depleted mantle (DM) and an enriched mantle (EM). Although, the EM component is variable, which can be ascribed to metasomatized subcontinent lithosphere (SCLM) and altered recycled oceanic crust (ROC) for the mantle sources of the Central‐North and East Mongolian basalts, respectively. Taking these results together with published age and high‐resolution tomographic data, we propose that all Cenozoic volcanism in Mongolia is related to shallow mantle (asthenosphere) upwelling stemming from the mantle transitional zone (MTZ), but the triggering causes for the mantle upwellings are different. The mantle upwelling related to generation of the Central‐North Mongolian basalts was likely triggered by a far‐field effect of the Indo‐Asian collision, which might have caused the avalanched/subducted materials of the Mongol‐Okhotsk and/or the Central Asian orogenic belt (CAOB) that sink into and stagnated within the MTZ. The mantle upwelling related to the formation of the East Mongolian basalts, which are located at the westernmost of the big mantle wedge constructed by the subducting and stagnant Pacific slab, was induced directly by the westward subduction of the Pacific Plate beneath East Asia.

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Geochemical Characteristics of Cenozoic Jining Basalts of the Western North China Craton: Evidence for the Role of the Lower Crust, Lithosphere, and Asthenosphere in Petrogenesis

Cited by 19 publications

References 45 publications

Lithosphere thinning beneath west North China Craton: Evidence from geochemical and Sr–Nd–Hf isotope compositions of Jining basalts

Lithosphere thinning beneath west North China Craton: Evidence from geochemical and Sr–Nd–Hf isotope compositions of Jining basalts

Genesis of Cenozoic low‐Ca alkaline basalts in the Nanjing basaltic field, eastern China: The case for mantle xenolith‐magma interaction

Major, trace element, and SrNd isotopic geochemistry of Cenozoic basalts in Central‐North and East Mongolia: Petrogenesis and tectonic implication

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