Sr–Nd–Pb isotope and trace element systematics of mantle xenoliths from Late Cenozoic alkaline lavas, South Korea

Choi, Sung Hi; Kwon, SangJoo; Mukasa, Samuel B.; Sagong, Hee

doi:10.1016/j.chemgeo.2005.04.008

Cited by 70 publications

(55 citation statements)

References 89 publications

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“…4B). The calculated Nd model age for the clinopyroxene in KR120 is 0.4 Ga, which is within the range of the Re depletion ages determined for Northeast China (2.7 -0.13 Ga; Gao et al, 2002) and within the range of Nd model ages determined from clinopyroxenes of the peridotite xenoliths from South Korea (1.1 -0.06 Ga; Choi et al, 2005). All these observations suggest that KR120 originates from the eastern Eurasian continental lithosphere.…”

Section: Discussionsupporting

confidence: 57%

“…The error bars of clinopyroxenes except of the KR363 clinopyroxene are shown within the symboles. The fields of Pacific MORB (Hofmann, 1997), Japan -Sea basalts (Tatsumoto and Nakamura, 1991;Cousen et al, 1994), Northeast Japan tholeiites (Togashi et al, 1992;Shibata and Nakamura, 1997), and clinopyroxene in South Korean peridotite xenoliths (Choi et al, 2005 and references therein; Kil, 2006) are also shown. Dashed lines indicate the present day Nd -Sr isotopic compositions of the bulk earth.…”

Section: Discussionmentioning

confidence: 99%

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Trace element and Sr-Nd isotopic features of ultramafic xenoliths from Kurose, Southwest Japan

Yoshikawa

Arai

Ishida

et al. 2010

Journal of Mineralogical and Petrological Sciences

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Ultramafic xenoliths from Kurose, Southwest Japan, are fragments of the lithospheric mantle beneath the back arc of the active Southwest Japan volcano -tectonic arc. Trace element and Sr -Nd isotopic compositions of the clinopyroxenes in the ultramafic xenoliths suggest that several enrichment processes are responsible for the geochemical variation. These xenoliths would have witnessed the following events: (1) open -system partial melting of the continental lithosphere with an influx of an asthenospheric melt with MORB -like isotopic composition during the formation of the back -arc basin that resulted from the Japan Sea opening, (2) open -system melting under an influx of a fluid/melt derived from a subducted slab, and (3) metasomatism after these partial melting events by an island arc tholeiitic basalt melt in the Neogene period. Moreover, variations in the depletion levels of Zr and Ti in the clinopyroxenes suggest that source depletion preceded the melting and metasomatic events.

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Section: Discussionsupporting

confidence: 57%

Section: Discussionmentioning

confidence: 99%

Trace element and Sr-Nd isotopic features of ultramafic xenoliths from Kurose, Southwest Japan

Yoshikawa

Arai

Ishida

et al. 2010

Journal of Mineralogical and Petrological Sciences

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“…노두에서 암편의 크기는 직경 1-10 cm으로 레졸라이트(lherzolite) 성분이 가장 우세하 다. 이보다 적은 양으로 하즈버가이트(harzburgite)와 휘석암(pyroxenite)이 노두에서 관찰된다 (Choi et al, 2002(Choi et al, , 2005Kil et al, 2008;Yang et al, 2010;Woo et al, 2014). 구성광물 입자크기와 조직에 따 라 분류하면 조립질의 프로토그래뉼라(protogranular) 가 가장 우세하며, 쌍봉입자분포를 가지는 반상쇄성 (porphyroclastic), 그리고 세립질이며 약한 엽리를 보 이는 포획암편이 소량 산출된다 (Yang et al, 2010;Yu et al, 2012;Woo et al, 2014).…”

Section: 페리도타이트 포획암unclassified

“…광역적 관점에서 보면, 제주도 페리도타이트 포획 암의 조직적/지화학적 특성은 세계 다른 곳의 상부맨 틀 암석권의 모습과 대체로 유사하다. 제주도 페리도 타이트 포획암의 주성분, 미량원소성분 조성은 비교 적 균질하며, 높은 Cr과 Mg 성분과 결핍된 현무암질 성분(Al, Ti)은 분별부분용융 이후에 남아있는 잔류물 특성을 나타낸다 (Choi et al, 2002(Choi et al, , 2005Kil et al, 2008;Yang et al, 2010;Woo et al, 2014 (Fig. 2a, b).…”

Section: 페리도타이트 포획암unclassified

Mantle-derived CO<sub>2</sub>-fluid Inclusions in Peridotite Xenoliths from the Alkali Basalt, Jeju Island, South Korea

Minyoung¹,

Woo²,

Park³

et al. 2016

The Journal of the Petrological Society of Korea

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), suggesting that most of the inclusions (originally trapped at mantle conditions) re-equilibrated to lower density values. Nevertheless, the highest density CO 2 in our fluid inclusions is consistent with entrapment of fluids at upper mantle pressures (and depths). The calculated trapping pressure from CO 2 -rich fluid inclusions that appear to be free from re-equilibrium, e.g., showing the lowest homogenization temperatures, is ≈0.9 GPa. Based on the petrographic evidences, the fluid entrapment can be regarded as a late stage event in the evolution of the shallow lithospheric mantle.

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“…현재까지의 연구결과에 의하면, 한반도 의 평균지각의 두께는 약 32-35 km인 것으로 알려져 있다 (김상조와 김소구, 1983; 이기화, 1979, 2010; 김 선균, 1995; 정태웅, 1995). (a) Koh and Yun, 2005;Shim et al, 2011;Choi et al, 2005;Kuritani et al, 2009;Choi et al,, 2006. (b) Yun et al, 1997Yun et al, 2000.…”

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Geochemical Composition of the Continental Crust in Korean Peninsula

이승구¹,

김동연²

2012

The Journal of the Petrological Society of Korea

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The chemical composition of the continental crust play an important role in understanding of crustal formation and evolution and quantifying other processes taking place within continental crust. We summarized geochemical data reported in the previous literature for the crustal rocks in the Korean Peninsula and divided their chemical composition into geologic time scale. In the variation diagram normalized by average composition of the upper crustal rocks, the geochemical characteristics of the upper crust during Triassic period is different from those of the upper crustal rocks after Jurassic period or before Precambrian. However, the geochemical characteristics of the Jurassic and Precambrain period are similar each other. Our summarized data indicate that the source material of Triassic upper crust may be different from that of Jurassic or Precambrian upper crust.

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Sr–Nd–Pb isotope and trace element systematics of mantle xenoliths from Late Cenozoic alkaline lavas, South Korea

Cited by 70 publications

References 89 publications

Trace element and Sr-Nd isotopic features of ultramafic xenoliths from Kurose, Southwest Japan

Trace element and Sr-Nd isotopic features of ultramafic xenoliths from Kurose, Southwest Japan

Mantle-derived CO<sub>2</sub>-fluid Inclusions in Peridotite Xenoliths from the Alkali Basalt, Jeju Island, South Korea

Geochemical Composition of the Continental Crust in Korean Peninsula

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