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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2018.1
- 수록면
- 697 - 710 (14page)
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초록· 키워드
오류제보하기
The rare earth element (REE) tetrad effect includes a large, strongly negative Eu anomaly, and appears in highly evolved, fractionated granite and/or A-type granite, which it is sometimes interpreted as evidence of fluid-rock interaction. Magnesium is a fluid-mobile element, and its isotopes show very little fractionation during igneous processes. In order to understand the formational processes that cause the REE tetrad effect in granitic magmas and the role of fluid-rock interaction in producing REE tetrad patterns, this study analyzed magnesium and oxygen isotope compositions along with REE patterns in three Cretaceous granites from the Okcheon belt, Korea. Samples exhibited a linear correlation between magnesium isotopic values (δ26Mg) and SiO2, MgO, TiO2, initial 87Sr/86Sr, 143Nd/144Nd values. Oxygen isotope values also showed some correlation with SiO2, TiO2, δ26Mg, initial 87Sr/86Sr, and 143Nd/144Nd values. Our data indicate that the three granites should be evolved from source magma derived from isotopically heterogeneous source materials within the crust. In addition, the relationship between initial 143Nd/144Nd and δ26Mg values strongly suggests that the REE tetrad effect may develop before the granitic magma evolved from crustal source material rather than during late stage of magma differentiation or hydrothermal alteration.
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등록된 정보가 없습니다.
참고문헌 (62)
참고문헌 신청
Insu Ahn / 2012 / Oxygen isotope measurements of terrestrial silicates using a CO2-laser BrF5 fluorination technique and the slope of terrestrial fractionation line / Geosciences Journal 16(1):7~16
Akagi, T. / 1993 / Lanthanide tetrad effect in kimuraite [$CaY_2(CO_3)_4{\cdot}6H_2O$ ]: implication for a new geochemical index / Geochimica et Cosmochimica Acta 57:2899~2905
Bau, M. / 1996 / Controls on the fractionation of isovalent trace elements in magmatic and aqueous systems : evidence fromY/Ho, Zr/Hf, and lanthanide tetrad effect / Contributions to Mineralogy and Petrology 123:323~333
Bau, M. / 1999 / Scavenging of dissolved yttrium and rare earths by precipitating iron oxyhydroxide: experimental evidence for Ce oxidation, Y-Ho fractionation, and lanthanide tetrad effect / Geochimica et Cosmochimica Acta 63:67~77
Bau, M. / 1995 / Comparative study of yttrium and rareearth element behaviours in fluorine-rich hydrothermal fluids / Contributions to Mineralogy and Petrology 119:213~223
Akagi, T. / 1993 / Lanthanide tetrad effect in kimuraite [
Bau, M. / 1996 / Controls on the fractionation of isovalent trace elements in magmatic and aqueous systems : evidence fromY/Ho, Zr/Hf, and lanthanide tetrad effect / Contributions to Mineralogy and Petrology 123:323~333
Bau, M. / 1999 / Scavenging of dissolved yttrium and rare earths by precipitating iron oxyhydroxide: experimental evidence for Ce oxidation, Y-Ho fractionation, and lanthanide tetrad effect / Geochimica et Cosmochimica Acta 63:67~77
Bau, M. / 1995 / Comparative study of yttrium and rareearth element behaviours in fluorine-rich hydrothermal fluids / Contributions to Mineralogy and Petrology 119:213~223
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