干旱区生态环境知识资源中心(Arid): Petrology of weathering materials developed on granites in Biou area, North-Cameroon: implication for rare-earth elements (REE) exploration in semi-arid regions

Arid

DOI	10.1016/j.heliyon.2021.e08581
	Petrology of weathering materials developed on granites in Biou area, North-Cameroon: implication for rare-earth elements (REE) exploration in semi-arid regions
	Sababa, Elise; Owona, Lionel G. Essomba; Temga, Jean Pierre; Ndjigui, Paul-Desire
通讯作者	Sababa, E (corresponding author)，Univ Yaounde I, Dept Earth Sci, POB 812, Yaounde, Cameroon.
来源期刊	HELIYON
EISSN	2405-8440
出版年	2021
卷号	7 期号:12
英文摘要	Due to the increasing demand resulting from the use of REE in many fields of human life, a weathering profile developed on granites in the semi-arid region of Biou area (North-Cameroon) has been characterized for rareearth elements (REE) exploration. The mineralogical compositions of weathered materials were revealed by Xray diffraction (XRD). X-ray Fluorescence (XRF) and Inductively Coupled Plasmas-Mass Spectrometry (ICP-MS) have been used to determine the geochemical composition of granites and the overlying weathered materials. The S-type and peraluminous granites are constituted by quartz, orthoclase, microcline, plagioclase, biotite, muscovite, pyroxene and opaque minerals. Accessory minerals are probably responsible for the interesting contents in REE + Y and some trace elements (e.g., Zr, Zn, Ba, Rb). The weathering profile show from the bottom to the top: (i) saprolitic horizons; (ii) lower loose clayey horizon; (iii) iron duricrust horizon; (iv) upper loose clayey horizon; (v) and organo-mineral horizon. Some weathered rock fragments remain in the loose clayey and organo-mineral horizons. The mineralogical composition of the weathering materials is dominated by illite, muscovite and feldspar. The low weathering degree of the materials is justified by the climatic and reducing conditions. The large ion lithophiles and ferromagnesian elements (Mg, Fe, V, Cu, Co, Cs Cr, Ni, Sc and Li) which are supposed to be mobile are so much accumulated in the weathering materials. REE show very low degree of fractionation in weathering profile due probably to the lack of good drainage. The whole weathering materials shows high REE + Y contents as its parent rock. Geochemical mass balance and enrichment factor reveal that REE, especially light REE, are so much enriched in the iron duricrust horizon (ion-adsorption REE deposit type). Some heavy REE are also enriched in the lower loose clayey horizon. This first survey has revealed that the weathering materials developed on granites in Biou area are favorable for further REE exploration.
英文关键词	Climate Weathering Geochemistry Enrichment factor REE exploration
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000740778400007
WOS关键词	MINERALIZATION STYLES ; CONGO CRATON ; SOUTH CHINA ; GEOCHEMISTRY ; TRACE ; MINERALOGY ; EVOLUTION ; DEPOSITS ; SOILS ; ROCKS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/375678
作者单位	[Sababa, Elise; Owona, Lionel G. Essomba; Temga, Jean Pierre; Ndjigui, Paul-Desire] Univ Yaounde I, Dept Earth Sci, POB 812, Yaounde, Cameroon
推荐引用方式 GB/T 7714	Sababa, Elise,Owona, Lionel G. Essomba,Temga, Jean Pierre,et al. Petrology of weathering materials developed on granites in Biou area, North-Cameroon: implication for rare-earth elements (REE) exploration in semi-arid regions[J],2021,7(12).
APA	Sababa, Elise,Owona, Lionel G. Essomba,Temga, Jean Pierre,&Ndjigui, Paul-Desire.(2021).Petrology of weathering materials developed on granites in Biou area, North-Cameroon: implication for rare-earth elements (REE) exploration in semi-arid regions.HELIYON,7(12).
MLA	Sababa, Elise,et al."Petrology of weathering materials developed on granites in Biou area, North-Cameroon: implication for rare-earth elements (REE) exploration in semi-arid regions".HELIYON 7.12(2021).