Geochemical features of Xuanlong type iron ore deposit in Hebei Province;and their geological significances

	Geochemical features of Xuanlong type iron ore deposit in Hebei Province;and their geological significances
	Li ZhiHong; Zhu XiangKun
刊名	ACTA PETROLOGICA SINICA
	2012
卷号	28 期号:9 页码:2903-2911
关键词	Xuanlong type iron ore deposit Fe isotopes Source Genesis Depositional environment
ISSN号	022HC
英文摘要	The results of major, trace, rare earth elements, Fe and Nd isotopic compositions of Xuanlong type iron ore deposit are reported. The average bulk compositions of iron ore are characterized by highest total Fe2O3, and relative enrichment in Al2O3, TiO2 and P2O5. The overall contents of trace elements are similar to those of the average crust, but with distinct enrichments of redox-sensitive trace elements (V, U, Mo). The total rare earth element contents are high, and the Shale-normalized REE patterns display depletion of light REE relative to heavy REE, non-significant positive anomalies of Eu and low Y/Ho values. Isotopically the iron ore samples have negative value of epsilon(Nd). These characteristics demonstrate that the iron source of Xuanlong type iron ore deosit are from detrital input. Hematites show heavy Fe isotope enrichment relative to IRMM-014, which is different from the negative or zero iron isotopic composition of modern analogues formed by cyanobacteria. Therefore, the iron isotope data of hematite provide evidence for the presence of Fe-oxidizing bacteria. Geochemical features including the lack of Ce negative anomalies, enrichments of V, U, Mo, and the heavy Fe isotope enrichment of hematite samples implies the oxygen fugacity in the depositional environment was relatively low.
学科主题	矿床地质
WOS关键词	RARE-EARTH-ELEMENTS ; FE ISOTOPE VARIATIONS ; FE(II) OXIDATION ; FRACTIONATION ; SEAWATER ; YTTRIUM ; CONSTRAINTS ; GREENLAND ; ORIGIN ; OCEAN
WOS研究方向	Geology
语种	中文
WOS记录号	WOS:000309947500019
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39857]
专题	中国地质科学院地质研究所
作者单位	Chinese Acad Geol Sci, Lab Isotope Geol, State Key Lab Continental Tecton & Dynam, MLR,Inst Geol, Beijing 100037, Peoples R China.
推荐引用方式 GB/T 7714	Li ZhiHong,Zhu XiangKun. Geochemical features of Xuanlong type iron ore deposit in Hebei Province;and their geological significances[J]. ACTA PETROLOGICA SINICA,2012,28(9):2903-2911.
APA	Li ZhiHong,&Zhu XiangKun.(2012).Geochemical features of Xuanlong type iron ore deposit in Hebei Province;and their geological significances.ACTA PETROLOGICA SINICA,28(9),2903-2911.
MLA	Li ZhiHong,et al."Geochemical features of Xuanlong type iron ore deposit in Hebei Province;and their geological significances".ACTA PETROLOGICA SINICA 28.9(2012):2903-2911.