Major, trace element, and isotopic compositions of Vietnamese basalts: Interaction of hydrous EM1-rich asthenosphere with thinned Eurasian lithosphere

Hoàng, Nguyễn; Flower, Martin F. J.; Carlson, Richard W.

doi:10.1016/s0016-7037(96)00247-5

Cited by 134 publications

(127 citation statements)

References 68 publications

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“…7. (Hoang et al, 1996;Flower et al, 1998;Chung, 1999;Zou et al, 2003;Park et al, 2005;Choi et al, 2006). 요약하자면 부화된 맨 틀의 근원지로 암석권 맨틀(엽렬된 후 재개한 내인성 …”

Section: 첨정석 페리도타이트의 광물조합에 적용할 수 있는 지온계는 매우 다양하다 보편적으로 이용되는 것에는unclassified

Lithospheric Mantle beneath the Korean Peninsula: Implications from Peridotite Xenoliths in Alkali Basalts

Choi¹

2012

The Journal of the Petrological Society of Korea

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Peridotite xenoliths hosted by alkali basalts from South Korea occur in Baengnyeong Island, Jeju Island, Boeun, Asan, Pyeongtaek and Ganseong areas. K-Ar whole-rock ages of the basaltic rocks range from 0.1 to 18.9 Ma. The peridotites are dominantly lherzolites and magnesian harzburgites, and the constituent minerals are Fo-rich olivine (Fo 88.4-92.0 ), En-rich orthopyroxene, Di-rich clinopyroxene, and Crrich spinel (Cr# = 7.8-53.6). Hydrous minerals, such as pargasite and phlogopite, or garnet have not been reported yet. The Korean peridotites are residues after variable degree of partial melting (up to 26%) and melt extraction from fertile MORB mantle. However, some samples (usually refractory harzburgites) exhibit metasomatic enrichment of the highly incompatible elements, such as LREE. Equilibration temperatures estimated using two-pyroxene geothermometry range from ca. 850 to 1050 o C. Sr and Nd isotopic compositions in clinopyroxene separates from the Korean peridotites show trends between depleted MORB-like mantle (DMM) and bulk silicate earth (BSE), which can be explained by secondary metasomatic overprinting of a precursor time-integrated depleted mantle. The Korean peridotite clinopyroxenes define mixing trends between DMM and EM2 end members on Sr-Pb and Nd-Pb isotopic correlation diagrams, without any corresponding changes in the basement. This is contrary to what we

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Section: 첨정석 페리도타이트의 광물조합에 적용할 수 있는 지온계는 매우 다양하다 보편적으로 이용되는 것에는unclassified

Lithospheric Mantle beneath the Korean Peninsula: Implications from Peridotite Xenoliths in Alkali Basalts

Choi¹

2012

The Journal of the Petrological Society of Korea

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“…Outline of the mantle source components of late Cenozoic basaltic rocks from East Asia (modified after Choi et al, 2006). Distributions of the basalts are after Hoang et al (1996), Barry et al (2003), Ho et al (2003), and Choi et al (2006). 1, Wudalianchi-Erkeshan-Keluo;2, Dariganga;3, Abaga;4, Chifeng;5, Hannuoba;6, Fanshi;7, Datong;8, Changbaishan;9, Baengnyeong Is.…”

Section: Discussionmentioning

confidence: 99%

“…Since the crustal components probably played a significant role in the genesis of volcanism in some regions, e.g., some Vietnamese basalts (Hoang et al, 1996) and Changbaishan trachytic rocks (Xie and Wan, 1992), we used Sr-isotope and trace element ratios such as Nb/U, Rb/Ba, and Rb/Sr to assess the effects of crustal contamination during magmatic ascent. In general, Sr-isotope ratios are sensitive to crustal contamination, especially from radiogenic continental crust composition.…”

Section: Geochemical Characteristics Of the Abaga Basalts And Implicamentioning

confidence: 99%

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Elemental and Sr-Nd-Pb isotopic compositions of late Cenozoic Abaga basalts, Inner Mongolia: Implications for petrogenesis and mantle process

Liu

Chen

et al. 2008

Geochem. J.

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“…Above all, while the continental extrusion model alone is not ready to explain the East Sea (South China Sea) opening dynamics, trench roll-back and post-IndiaEurasian collision magmatism, alternatively, the mantle extrusion model may account for most of the above phenomena (e.g. Hoang et al, 1996Hoang et al, , 2013Flower et al, 1998Flower et al, , 2001Royden et al, 2008;Yang and Liu, 2009). …”

Section: Mantle Source and Magma Genesis In The Tu Le Basinmentioning

confidence: 99%

Magma source feature and eruption age of volcanic rocks in the Tram Tau district, Tu Le Basin

et al. 2016

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A set of samples including porphyritic rhyolite, rhyo-trachyte, trachyte and basalt was collected in the Tram Tau district, Tu Le Mesozoic Basin, in NW Viet Nam for analysis for major, trace, elemental and Rb-Sr and Sm-Nd isotopic compositions. The volcanic rocks are alkaline and highly enriched in trace elements including rare earth elements (REEs). However, primitive mantle and chondrite trace element normalized patterns expose strong negative anomalies for Ba, Sr, Eu and Ti, possibly reflecting fractional crystallization of plagioclase (for Sr and Eu), pyroxene, and especially amphibole (for Ba and Ti). The measured Sr ratio of 0.703 would occur, respectively, at 3÷4% and 2÷5% to generate the observed strontium isotopic ratios in the Tram Tau volcanic rocks.

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Major, trace element, and isotopic compositions of Vietnamese basalts: Interaction of hydrous EM1-rich asthenosphere with thinned Eurasian lithosphere

Cited by 134 publications

References 68 publications

Lithospheric Mantle beneath the Korean Peninsula: Implications from Peridotite Xenoliths in Alkali Basalts

Lithospheric Mantle beneath the Korean Peninsula: Implications from Peridotite Xenoliths in Alkali Basalts

Elemental and Sr-Nd-Pb isotopic compositions of late Cenozoic Abaga basalts, Inner Mongolia: Implications for petrogenesis and mantle process

Magma source feature and eruption age of volcanic rocks in the Tram Tau district, Tu Le Basin

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