Origin of Late Cenozoic Abaga–Dalinuoer basalts, eastern China: Implications for a mixed pyroxenite–peridotite source related with deep subduction of the Pacific slab

Zhang, Maoliang; Guo, Zhengfu

doi:10.1016/j.gr.2016.05.014

Cited by 54 publications

(35 citation statements)

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“…Although intraplate low‐silica alkaline magmas show major element patterns in simple Harker diagrams and phase relations similar to those of experimental melts derived from CO 2 ‐bearing peridotite and/or eclogite (Dasgupta et al, ; Mallik & Dasgupta, ; Mallik & Dasgupta, ), they may also be produced by partial melting of mafic sources composed predominantly of amphibole‐rich metasomatic veins (Pilet, ; Pilet et al, ; Yang et al, ). Our previous study suggests that basaltic melts derived from mafic sources can be statistically distinguished from peridotite‐derived melts in the FC3MS space (FeO/CaO − 3 * MgO/SiO 2 , all in weight percent; Yang & Zhou, ), which has been used to identify the source lithologies of continental OIB (ocean island basalt)‐type basalts (e.g., Chu et al, ; Dai et al, ; Li et al, ; Sheldrick et al, ; Xu et al, ; Yang et al, ; Zhang & Guo, ), boninites (Zhao & Asimow, ), and continental flood basalts (e.g., Cheng et al, ; Heinonen et al, ; Heinonen & Fusswinkel, ; Howarth & Harris, ); however, there are some fertile peridotite melts that still cannot be separated from melts derived from either normal peridotitic or mafic sources in the FC3MS space (Yang et al, ; Yang & Zhou, ).…”

Section: Introductionmentioning

confidence: 99%

Using Major Element Logratios to Recognize Compositional Patterns of Basalt: Implications for Source Lithological and Compositional Heterogeneities

Yang

Jiang

et al. 2019

JGR Solid Earth

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Understanding the source lithology of basalts can greatly impact our understanding of magmatic processes, which can help us gain insight into mantle heterogeneity and crustal material recycling. However, many uncertainties remain about how to recognize the relationship between major element patterns of basalts and source lithological and/or compositional diversities using typical petrological methods. In this study, discriminant functional analysis and multivariate regression are carried out using major element logratios for literature experimental melts of four primitive mantle-like lherzolites and six mafic lithologies (five pyroxenites and one hornblendite). A parameter called FCMS (FCMS = ln (FeO/ CaO) − 0.058 * (ln (MgO/SiO 2 )) 3 − 0.636 * (ln (MgO/SiO 2 )) 2 − 1.850 * ln (MgO/SiO 2 ) − 1.170, all the major elements in weight percent) is proposed to identify source lithologies for basaltic melts. When the logratios ln(K 2 O/Al 2 O 3 ), ln (TiO 2 /Na 2 O), and ln (Na 2 O/K 2 O) are incorporated into FCMS, the temperature and pressure effects on the compositional heterogeneity of peridotites melts can be significantly reduced; a more powerful parameter called FCKANTMS (FCKANTMS = ln (FeO/CaO) − 0.08 * ln(K 2 O/Al 2 O 3 ) − 0.052 * ln (TiO 2 /Na 2 O) − 0.036 * ln (Na 2 O/K 2 O) * ln (Na 2 O/TiO 2 ) − 0.062 * (ln (MgO/SiO 2 )) 3 − 0.641 * (ln (MgO/ SiO 2 )) 2 − 1.871 * ln (MgO/SiO 2 ) − 1.473, all the major elements in weight percent) can be obtained. Olivine fractional crystallization and accumulation, although they can significantly change most major element contents and ratios, usually increase or decrease FCMS and FCKANTMS by only 0-0.15, which is one order of magnitude lower than their variations in the primary experimental melts of different lithologies. Importantly, approximately 80% and 50% low to moderate degree (F < 60%) partial melts (n = 303) of mafic lithology (with or without volatiles in source materials) can be distinguished from melts of peridotite and transitional lithologies when FCKANTMS combined with ln (CaO/TiO 2 ) and ln (SiO 2 / (CaO + Na 2 O + TiO 2 )). Thus, the chemical markers could be used to constrain source lithology and origin of natural basalts.Plain Language Summary Basaltic melts can be experimentally produced from a variety of mafic and ultramafic lithologies. Understanding the source lithology of basalts can greatly impact our understanding of magmatic processes, which can help us gain insight into mantle heterogeneity and crustal material recycling. However, many uncertainties remain about how to identify the source lithology of basalts using traditional petrological methods. In this study, major element patterns of experimental basaltic melts are explored using major element logratios. We find that most peridotite melts can be distinguished from pyroxenite and hornblendite melts by the logratio-based chemical markers. Thus, the chemical markers could be used to constrain source lithology and origin of natural basalts.

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Section: Introductionmentioning

confidence: 99%

Using Major Element Logratios to Recognize Compositional Patterns of Basalt: Implications for Source Lithological and Compositional Heterogeneities

Yang

Jiang

et al. 2019

JGR Solid Earth

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“…Previously published Sr  Nd isotopic data (cross) for the basalts in southern Baikal, central Mongolia, and NE China are also plotted for comparison. Data sources are from Basu et al (), Zhang, Suddaby, Thompson, Thirlwall, and Menzies (), Rasskazov et al (), Barry et al (), Yarmolyuk et al (), Zou et al (), Tang et al (), Ho, Liu, Chen, and Yang (); Ho, Liu, Chen, You, and Yang (), Chen, Zhang, Graham, Su, and Deng (), Kuritani et al (), Xu et al (), Zhang, Zhang, Fan, Han, and Zhou (), Tsypukova et al (), Zhang et al (), Yarmolyuk et al (), Chen, Fan, Zou, Zhao, and Shi (), Qian, Ren, Zhang, Hong, and Liu (), Guo et al (), and Zhang and Guo (). Reference fields for DM (depleted mantle), EM1 and EM2 (enriched mantle), MORB (mid‐ocean range basalt) and OIB (oceanic island basalt) are from Stracke, Bizimis, and Salters () and Stracke, Hofmann, and Hart () [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Resultsmentioning

confidence: 99%

“…Diagrams of Nb/U versus Ce/Pb (a), La/Nb versus Ba/Nb (b), 87 Sr/ 86 Sr versus SiO 2 (c), and εNd(t) versus SiO 2 (d) for all analysed basaltic samples from Hovsgol, Taatsin Gol, and Dariganga‐Abaga. Previously published Sr  Nd isotopic data (cross) taken from Barry et al (), Ho et al (), Tsypukova et al (), Yarmolyuk et al (), Guo et al (), and Zhang and Guo () [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Discussionmentioning

confidence: 99%

“…Na/Ti of melts decreases with increasing mean pressure, because the clinopyroxene-melt partition coefficient of Na increases with increasing pressure (Blundy, Falloon, Wood, & Dalton, 1995;Kinzler, 1997), while both the clinopyroxene-and garnet-melt partition coefficients of Ti remain constant or decrease (Kinzler, 1997;Putirka, 1999a). Na/Ti ratio of the Hovsgol basalts is high 2015), Chen, Fan, Zou, Zhao, and Shi (2015), Qian, Ren, Zhang, Hong, and Liu (2015), Guo et al (2016), and Zhang and Guo (2016). Reference fields for DM (depleted mantle), EM1 and EM2 (enriched mantle), MORB (mid-ocean range basalt) and OIB (oceanic island basalt) are from Stracke, Bizimis, and Salters (2003) and Stracke, Hofmann, and Hart (2005) Conversely, variable even contrasting Sr-Nd isotope compositions ( Figure 6) as well as differences in K anomaly in the spider diagram (Figure 5b,d), of the basalts cannot be explained by variable partial melting degrees/pressures of a homogeneous mantle source because partial melting cannot change the Sr-Nd isotope compositions (Kogiso, Hirschmann, & Pertermann, 2004).…”

Section: Mantle Source Natures and Partial Meltingmentioning

confidence: 99%

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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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“…Ancient subducted continental sediments in the mantle transition zone (MTZ) may comprise K-hollandite with low 238 U/ 204 Pb value and can eventually evolve to EM 1-type with low 206 Pb/ 204 Pb after longtime (> 1.5 Ga) separation [73,74], which can be considered as the EM 1 component captured by basaltic magmas in eastern China [75]. However, high 206 Pb/ 204 Pb for the Qianjiadian mafic rocks cannot be the result of mixing between DM and EM 1 end members (Figure 9c,d).…”

Section: Mantle Source Of the Qianjiadian Mafic Rocksmentioning

confidence: 99%

Petrogenetic Constraints of Early Cenozoic Mafic Rocks in the Southwest Songliao Basin, NE China: Implications for the Genesis of Sandstone-Hosted Qianjiadian Uranium Deposits

Yang

Fengjun

et al. 2020

Minerals

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The tectonic inversion of the Songliao Basin during the Cenozoic may have played an important role in controlling the development of sandstone-type uranium deposits. The widely distributed mafic intrusions in the host sandstones of the Qianjiadian U ore deposits provided new insights to constrain the regional tectonic evolution and the genesis of the U mineralization. In this study, zircon U-Pb dating, whole-rock geochemistry, Sr-Nd-Pb isotope analysis, and mineral chemical compositions were presented for the mafic rocks from the Qianjiadian area. The mafic rocks display low SiO2 (44.91–52.05 wt.%), high TFe2O3 contents (9.97–16.46 wt.%), variable MgO (4.59–15.87 wt.%), and moderate K2O + Na2O (3.19–6.52 wt.%), and can be subdivided into AB group (including basanites and alkali olivine basaltic rocks) and TB group (mainly tholeiitic basaltic rocks). They are characterized by homogenous isotopic compositions (εNd (t) = 3.47–5.89 and 87Sr/86Sr = 0.7032–0.7042) and relatively high radiogenic 206Pb/204Pb (18.13–18.34) and Nb/U ratios (23.0–45.6), similar to the nearby Shuangliao basalts, suggesting a common asthenospheric origin enriched with slab-derived components prior to melting. Zircon U-Pb and previous Ar-Ar dating show that the AB group formed earlier (51–47 Ma) than the TB group (42–40 Ma). Compared to the TB group, the AB group has higher TiO2, Na2O, K2O, P2O5, Ce, and HREE contents and Ta/Yb and Sr/Yb ratios, which may have resulted from variable depth of partial melting in association with lithospheric thinning. Combined with previous research, the Songliao Basin experienced: (1) Eocene (~50–40 Ma) lithospheric thinning and crustal extension during which mafic rocks intruded into the host sandstones of the Qianjiadian deposit, (2) a tectonic inversion from extension to tectonic uplift attributed to the subduction of the Pacific Plate occurring at ~40 Ma, and (3) Oligo–Miocene (~40–10 Ma) tectonic uplift, which is temporally associated with U mineralization. Finally, the close spatial relation between mafic intrusions and the U mineralization, dike-related secondary reduction, and secondary oxidation of the mafic rocks in the Qianjiadian area suggest that Eocene mafic rocks and their alteration halo in the Songliao Basin may have played a role as a reducing barrier for the U mineralization.

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Origin of Late Cenozoic Abaga–Dalinuoer basalts, eastern China: Implications for a mixed pyroxenite–peridotite source related with deep subduction of the Pacific slab

Cited by 54 publications

References 163 publications

Using Major Element Logratios to Recognize Compositional Patterns of Basalt: Implications for Source Lithological and Compositional Heterogeneities

Using Major Element Logratios to Recognize Compositional Patterns of Basalt: Implications for Source Lithological and Compositional Heterogeneities

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

Petrogenetic Constraints of Early Cenozoic Mafic Rocks in the Southwest Songliao Basin, NE China: Implications for the Genesis of Sandstone-Hosted Qianjiadian Uranium Deposits

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