Sr-Nd-Pb isotopic compositions of submarine alkali basalts recovered from the South Korea Plateau, East Sea SCIE SCOPUS KCI

Cited 8 time in WEB OF SCIENCE Cited 8 time in Scopus
Title
Sr-Nd-Pb isotopic compositions of submarine alkali basalts recovered from the South Korea Plateau, East Sea
Author(s)
Lee, Mi Jung; Lee, Jong Ik; Kwon, Sung-Tack; Choo, Mi Kyung; Jeong, Kap-Sik; Cho, Jin-Hyung; Kim, Seong-Ryul
KIOST Author(s)
Jeong, Kap Sik(정갑식)Cho, Jin Hyung(조진형)
Publication Year
2011-06
Abstract
We present geochemical and isotope results (Sr, Nd, Pb) on submarine basalts dredged from the southeastern margin of the South Korea Plateau. The present data are the first geochemical result obtained on submarine basaltic lavas recovered from the Korea Plateau, which is considered to be one of rifted remnants of continent in the East Sea (Sea of Japan) and partially segmented from the Korean Peninsula. The South Korea Plateau basalts (SKPB) show alkali affinities and are characterized by Ocean Island Basalts (OIB)-like trace element compositions relatively enriched in Ba, Nb and Pb. They display relatively flatter [(Ce/Yb)n = 4.49 similar to 5.46] and less fractionated HREE [(Dy/Yb)n = 1.11 similar to 1.29] patterns compared to average OIB, implying that the SKPB were derived from a relatively shallower mantle depth with a larger degree of partial melting. The Sr, Nd and Pb isotopic compositions of the SKPB display a range of values for (87)Sr/(86)Sr (0.70378 to 0.70409), (143)Nd/(144)Nd (0.512846 to 0.512860) and (206)Pb/(204)Pb (17.88-18.44). They show a considerably high range of (207)Pb/(204)Pb (15.48-15.62) and (208)Pb/(204)Pb (37.86-38.46) values, indicating the involvement of a DUPAL-like MORB source. According to our two-stage magma mixing model, the isotopic compositions of SKPB can be explained by magma source mixing by the addition of an EMII-like mantle component (up to 2%) to the DUPAL-like MORB source embedded with endogenous EMI-like material (about 2%).
ISSN
1226-4806
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3862
DOI
10.1007/s12303-011-0017-9
Bibliographic Citation
GEOSCIENCES JOURNAL, v.15, no.2, pp.149 - 160, 2011
Publisher
SPRINGER HEIDELBERG
Keywords
South Korea Plateau; dreged basalt; Sr-Nd-Pb isotope; DUPAL; OIB
Type
Article
Language
English
Document Type
Article
Publisher
SPRINGER HEIDELBERG
Related Researcher
Research Interests

Marine Geology,Marine Geochemistry,Marine Security and Safety Research,해양지질,해양지화학,해양방위

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