Regional geochemical baseline concentration of potentially toxic trace metals in the mineralized Lom Basin, East Cameroon: a tool for contamination assessment

Table 1 Semi-quantitative mineralogical composition of selected stream sediments and representative rock types of the lower Lom Basin

	GB15	GB20	GB24	GB34	GB44	GB47	Range
Quartz	82	39	79	86	82	72	39–86
Phyllosilicates	45	32	0	0	10	0	0–45
Feldspars	0	12	12	0	0	25	0–25
Rutile	0	27	30	0	0	0	0–30
Gismondine	0	25	0	27	0	0	0–27
Rock type	Upper gneiss	Embrechyte	Granodiorite	Lower gneiss	Schists, quartzite, conglomerates	Granite

ISSN: 1467-4866