Table 3.

Comparison of the present estimated RHP values to those obtained in Nigeria and other parts of the globe.

S/No	Lithology	Location	Average RHP ($\mathbf{\mu }\mathbf{W}/{\mathit{m}}^{\mathbf{3}}$)	References
1	Granites	Egypt	3.20	[25]
2	Granites	Egypt	3.90	[1]
3	Basic Igneous rocks	Norway	0.74	[34]
4	Gneissic rocks	NW-Nigeria	2.23	[3]
5	Meta-Sediments	Norway	1.55	[34]
6	Granitic rocks	Norway	2.94	[34]
7	Granites	Australia	2.60	[35]
8	Sedimentary rocks	NW-Nigeria	0.44	[3]
9	Sediments	Australia	0.90	[35]
10	Phosphatic rocks	Syria	1.33	[10]
11	Granites	Gebel Duwi, Egypt	1.48	[24]
12	Basement rocks	SW-Nigeria	2.03	[7]
13	Granites	NE-Nigeria	2.50	present study
14	Sedimentary rocks	NE-Nigeria	1.58	present study
15	Gneisses	NE-Nigeria	2.87	present study
16	Basalts	NE-Nigeria	2.32	present study