Mantle extrusion: A model for dispersed volcanism and DUPAL-like asthenosphere in East Asia and the western Pacific

Flower, Martin F. J.; Tamaki, Kensaku; Hoàng, Nguyễn

doi:10.1029/gd027p0067

Cited by 128 publications

(118 citation statements)

References 117 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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“…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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“…See text for explanations Walker et al, 1979) compared with experimental isobaric liquidi from Hirose and Kushiro (1993) and Kushiro (1996). Accordingly, Cam Thuy basalts segregated from their magma sources between 22.5 and 28 Kb with potential temperatures of about 1400ºC to 1450ºC (after Hoang and Flower, 1998) …”

Section: Tectonic Setting Of Cam Thuy Basaltsmentioning

confidence: 99%

“…McKenzie and O'Nions, 1991;Scarrow and Cox, 1995;Turner and Hawkesworth, 1995), (2) interpolation from H 2 O-saturated and unsaturated experimental studies of fertile and refractory peridotite (e.g. Hoang and Flower, 1998). Assuming mantle H 2 O contents beneath NW Vietnam to be minimal we have made best estimates of pressure, temperature and melt fraction by comparing primitive melt compositions with anhydrous or nearanhydrous experimental studies (e.g.…”

Section: Mantle Sources and Melt Forming Conditionsmentioning

confidence: 99%

Petrography and geochemistry of Permian basalts of the Cam Thuy formation and their relation to Song Da and Emeishan magmatic rocks

et al. 2016

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Cam Thuy Permian basalts consisting of thick lava flows and pyroclastic layers appear along both sides of the Song Ma fault zone in Thanh Hoa and in Son La and Ninh Binh provinces, NW Vietnam. The magmatism has been thought to have genetic relationship with Permian volcanism in the Song Da rift zone, which is believed to be part of the Emeishan large igneous province, having been extruded along the Red River shear zone following Paleogene India-Eurasian collision. A set of Cam Thuy volcanic samples including olivine and alkaline basalts was collected in the Lam Son area (Tho Xuan, Thanh Hoa province) to analyze for geochemical major, trace element and Sr-Nd-Pb isotopic composition. The Cam Thuy basalts are high-TiO 2 , CaO, FeO*, moderate MgO and SiO 2 that plot between the Song Da and Emeishan high-and low-Ti basalt distribution fields and closely overlap that of Song Da's high-Ti field. The primitive mantle and chondrite normalized trace element patterns of Cam Thuy basalts are essentially enriched oceanic island basalt (OIB)-like; this feature, together with crustal contamination-free, chondritic Sr, Nd and Pb initial (255Ma) isotopic composition are certainly of asthenospheric origin. These geochemical and isotopic characteristics are closely analogous to those features observed for the Song Da high-Ti basalts, suggesting similarity in their source of origin. Nevertheless, while the Song Da (and Emeishan) magmatism is signified by the presence of both high-and low-Ti basalts, with the latter being derived from heterogeneous and partially crustal-material contaminated sources in the lithospheric mantle, this low-Ti volcanic rock type has yet to be discovered in the Cam Thuy formation.

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Mantle extrusion: A model for dispersed volcanism and DUPAL-like asthenosphere in East Asia and the western Pacific

Cited by 128 publications

References 117 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

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

Petrography and geochemistry of Permian basalts of the Cam Thuy formation and their relation to Song Da and Emeishan magmatic rocks

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