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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.1
- 수록면
- 971 - 983 (13page)
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이 논문의 연구 히스토리 (3)
2018
Interpretation of formation condition in Superior-type banded iron formation (BIF) of Yuanjiacun in North China Craton using magnetite
문인경
,
이인성
,
이정진
외 2명
지질학회지
2018.06
학술저널
Reconstruction of the genesis of banded iron formation in North China Craton : Evidences from geochemical studies on the iron ore, related wall rock and magnetite
문인경
지구환경과학부
2018.01
학위논문
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초록· 키워드
오류제보하기
Majority of the banded iron formations (BIFs) in China are hosted in North China Craton (NCC). The BIFs in NCC are interlayered with metamorphics including amphibolite, and mainly composed of quartz, magnetite, and hematite with minor minerals such as garnet, epidote, chlorite, calcite, biotite, and pyrite. They were formed during from Paleoarchean to the early Paleoproterozoic with a peak at Neoarchean. Wall rock and Fe ore bodies in the BIFs have experienced greenschist to granulite facies metamorphism. Because of the intensive post-ore geologic activities, ores in the BIFs in NCC are characterized as low Fe grade (30.35 wt% of Fe in average) compared to those in the world. Most of the BIFs in China are affiliated into Algoma-type BIF. The Fe ores are composed of SiO2 and Fe2O3 T with minor Al2O3, MgO, CaO, Rb, Sr, Zr, Hf, Cr, and Co. Post Archean Average Shale (PAAS) normalized REY (rare earth elements with Y) patterns in the Fe ores show depletion in light REE (rare earth elements; LREE) compared to heavy REE (HREE) with positive La and Eu anomalies, suggesting that the Fe ores in BIFs were precipitated from the seawater with hydrothermal fluids. Trace elements ratios further suggest that the Fe and Si in the BIFs were derived from volcanic-related submarine hydrothermal fluids. Incorporation of continental-derived clastic materials are insignificant in most of the BIFs, while a few exhibit some incorporations. Ce anomalies in the Fe ore indicate an evolution of redox state during the BIF formation. Tectonic models in NCC and the formation of the BIFs were suggested by the geochemical and geological investigations in this study.
목차
등록된 정보가 없습니다.
참고문헌 (58)
참고문헌 신청
Alexander, B. W. / 2008 / Continentally-derived solutes in shallow Archean seawater: rare earth element and Nd isotope evidence in iron formation from the 2.9Ga Pongola Supergroup, South Africa / Geochimica et Cosmochimica Acta 72:378~394
Alibo, D.S. / 1999 / Rare earth elements in seawater: particle association, shale-normalization, and Ce oxidation / Geochimica et Cosmochimica Acta 63:363~372
Basta, F. F. / 2011 / Petrology and geochemistry of the banded iron formation (BIF) of Wadi Karim and Um Anab, Eastern Desert, Egypt: implications for the origin of Neoproterozoic BIF / Precambrian Research 187:277~292
Bau, M. / 1991 / Rare-earth element mobility during hydrothermal and metamorphic fluid-rock interaction and the significance of the oxidation state of europium / Chemical Geology 93:219~230
Bau, M. / 1996 / Distribution of yttrium and rare-earth elements in the Penge and Kuruman iron-formations, Transvaal Supergroup, South Africa / Precambrian Research 79:37~55
Alibo, D.S. / 1999 / Rare earth elements in seawater: particle association, shale-normalization, and Ce oxidation / Geochimica et Cosmochimica Acta 63:363~372
Basta, F. F. / 2011 / Petrology and geochemistry of the banded iron formation (BIF) of Wadi Karim and Um Anab, Eastern Desert, Egypt: implications for the origin of Neoproterozoic BIF / Precambrian Research 187:277~292
Bau, M. / 1991 / Rare-earth element mobility during hydrothermal and metamorphic fluid-rock interaction and the significance of the oxidation state of europium / Chemical Geology 93:219~230
Bau, M. / 1996 / Distribution of yttrium and rare-earth elements in the Penge and Kuruman iron-formations, Transvaal Supergroup, South Africa / Precambrian Research 79:37~55
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