Insight into the Origin of Iron Ore Based on Elemental Contents of Magnetite and Whole-Rock Geochemistry:A Case of the Bipindi Banded Iron Formations, Nyong Complex, SW Cameroon

IOCAS-IR

	Insight into the Origin of Iron Ore Based on Elemental Contents of Magnetite and Whole-Rock Geochemistry:A Case of the Bipindi Banded Iron Formations, Nyong Complex, SW Cameroon
	Landry Soh Tamehe ; Huan Li; Sylvestre Ganno ; Zuxing Chen ; Yanick Brice Lemdjou ; Safiyanu Muhammad Elatikpo
发表期刊	Journal of Earth Science
ISSN	1674-487X
	2022-01-27
出版年	2024
卷号	v.35 期号:01 页码:21-33
文献类型	CNKI期刊论文
摘要	The Bipindi iron ore district is located in the central section of the Nyong Complex at the northwestern margin of the Congo Craton in Southwest Cameroon. This iron district contains numerous iron mineralization hosted by the Mewongo, Bibole, Kouambo, and Zambi banded iron formations(BIFs). These BIFs contain magnetite as the main iron ore mineral associated with pyrite, and gangue minerals are quartz with minor chlorite and amphibole. The origin of iron ore from these BIFs was investigated using a combination of in-situ magnetite and whole-rock chemistry. The studied BIF ore samples have a narrow range of TFe between 30.90 wt.% and 43.20 wt.%, indicating a low-grade ore. The geochemical signatures of magnetite such as low contents of base metals(e.g., Cu, Co, V, and Zn) and low Co/Zn ratios < 0.85 indicate a hydrothermal origin. Combined with the geochemical features of these BIFs, e. g., high Fe/Ti and Fe/Al ratios(mean > 600 and > 75, respectively), we suggest that magnetite was derived from a mixture of seawater and ～0.1% low-temperature hydrothermal fluids in an oxidizing environment. Collectively, low-temperature hydrothermal and later metamorphic fluids were necessary for the transformation of the protolith Nyong Complex BIFs to iron ore.
关键词	banded iron formations iron ore geochemistry Congo Craton trace element composition LA-ICP-MS
CNKI专辑号	A;B;
CNKI专辑名称	基础科学;工程科技Ⅰ辑;
CNKI专题号	A011;B021;
CNKI专题名称	地质学;矿业工程;
分类号	P618.31;P587
语种	英文;
资助项目(基金）	supported by the Central South University Postdoctoral Research Fund (No. 22020084)
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/187516
专题	中国科学院海洋研究所
作者单位	1.SchoolofGeosciencesandInfo-Physics,CentralSouthUniversity 2.DepartmentofEarthSciences,UniversityofYaoundéI 3.InstituteofOceanology,ChineseAcademyofSciences 4.DepartmentofGeology,AhmaduBelloUniversityZaria
推荐引用方式 GB/T 7714	Landry Soh Tamehe,Huan Li,Sylvestre Ganno,et al. Insight into the Origin of Iron Ore Based on Elemental Contents of Magnetite and Whole-Rock Geochemistry:A Case of the Bipindi Banded Iron Formations, Nyong Complex, SW Cameroon. 2022.