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

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

  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  
  1. GB Garoua-Boulai Betare-Oya