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

Table 6

Results of instrumental neutron activation analysis of concentration of gold in soil samples.

Sample number →	S1	S2	S3	S4	S5	S6	S7	S9	S10	S11	S12	S13
Field →	Tuniya	Yar Kaura	Sado	Mayowa	Maru	Atakar	Hanudezoma	Gwar Gawo	Kadaure	Ferri Ruwa	Dangorowa	Soro Kudi
Au (ppb) →	16	<5	80	266	<5	<5	79	5700	2850	<5	27	<5
Crustal abundance of gold (ppb) →	5	5	5	5	5	5	5	5	5	5	5	5
Clarke value (ppb) [b] →	4	4	4	4	4	4	4	4	4	4	4	4
Approximate minimum quantity to qualify as an ore (ppb) [c]	2000	2000	2000	2000	2000	2000	2000	2000	2000	2000	2000	2000

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