Mineralogical and Geochemical Characterization of Gold Bearing Quartz Veins and Soils in Parts of Maru Schist Belt Area, Northwestern Nigeria

Table 3

Results of fire assay and instrumental neutron activation analysis of gold bearing quartz veins.

Detection limit →	Au; 1; pbb	Normal abundance in un-mineralized material (ppb) [a]	Clarke value (ppb) [b]	Approximate minimum quantity to qualify as an ore (ppb) [c]	Mass (g)
Sample number ↓
O6	10	5	4	2000	30.50
O7	6280	5	4	2000	20.10
O8	12	5	4	2000	20.70
O10	39	5	4	2000	30.40

[a]: [19] and [20]; [b and c]: [21].