SEGMENTED INFORMATION (Details 1) - USD ($)	3 Months Ended		9 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Sales	$ 0	$ 0	$ 0	$ 0
Costs and Expenses:
Cost of sales	0	0	0	0
Inventory write-down	0	0	60,694	0
Mineral property expenditures	999,241	725,968	2,956,805	3,408,813
General and administrative	2,092,656	2,005,465	6,616,141	7,086,669
Depreciation, amortization and accretion	117,792	205,488	397,399	680,573
Impairment loss on mineral properties	0	0	297,942	86,535
Total Cost and Expenses	3,209,689	2,936,921	10,328,981	11,262,590
Loss from operations	(3,209,689)	(2,936,921)	(10,328,981)	(11,262,590)
Other income (expenses)	(597,938)	(750,514)	(2,081,085)	(2,312,914)
Loss before income taxes	(3,807,627)	(3,687,435)	(12,410,066)	(13,575,504)
United States Texas [Member]
Sales	0	0	0	0
Costs and Expenses:
Cost of sales	0	0	0	0
Inventory write-down	0	0	60,694	0
Mineral property expenditures	703,147	495,830	1,651,954	2,347,348
General and administrative	1,363,303	1,426,110	4,628,740	5,074,713
Depreciation, amortization and accretion	115,071	200,732	390,138	667,080
Impairment loss on mineral properties	0	0	185,942	0
Total Cost and Expenses	2,181,521	2,122,672	6,917,468	8,089,141
Loss from operations	(2,181,521)	(2,122,672)	(6,917,468)	(8,089,141)
Other income (expenses)	(593,873)	(745,888)	(2,067,125)	(2,299,582)
Loss before income taxes	(2,775,394)	(2,868,560)	(8,984,593)	(10,388,723)
United States Arizona [Member]
Sales	0	0	0	0
Costs and Expenses:
Cost of sales	0	0	0	0
Inventory write-down	0	0	0	0
Mineral property expenditures	23,354	3,982	69,866	213,885
General and administrative	3,389	66,534	30,372	141,526
Depreciation, amortization and accretion	0	0	0	0
Impairment loss on mineral properties	0	0	8,334	0
Total Cost and Expenses	26,743	70,516	108,572	355,411
Loss from operations	(26,743)	(70,516)	(108,572)	(355,411)
Other income (expenses)	(4,611)	(4,663)	(14,146)	(14,198)
Loss before income taxes	(31,354)	(75,179)	(122,718)	(369,609)
United States Other States [Member]
Sales	0	0	0	0
Costs and Expenses:
Cost of sales	0	0	0	0
Inventory write-down	0	0	0	0
Mineral property expenditures	28,051	881	60,881	133,031
General and administrative	1,068	989	3,203	2,652
Depreciation, amortization and accretion	249	750	747	2,250
Impairment loss on mineral properties	0	0	103,666	86,535
Total Cost and Expenses	29,368	2,620	168,497	224,468
Loss from operations	(29,368)	(2,620)	(168,497)	(224,468)
Other income (expenses)	0	0	0	0
Loss before income taxes	(29,368)	(2,620)	(168,497)	(224,468)
Canada [Member]
Sales	0	0	0	0
Costs and Expenses:
Cost of sales	0	0	0	0
Inventory write-down	0	0	0	0
Mineral property expenditures	0	0	0	0
General and administrative	721,423	514,853	1,915,131	1,865,839
Depreciation, amortization and accretion	2,016	2,385	5,984	6,017
Impairment loss on mineral properties	0	0	0	0
Total Cost and Expenses	723,439	517,238	1,921,115	1,871,856
Loss from operations	(723,439)	(517,238)	(1,921,115)	(1,871,856)
Other income (expenses)	1,034	31	635	849
Loss before income taxes	(722,405)	(517,207)	(1,920,480)	(1,871,007)
Paraguay [Member]
Sales	0	0	0	0
Costs and Expenses:
Cost of sales	0	0	0	0
Inventory write-down	0	0	0	0
Mineral property expenditures	244,689	225,275	1,174,104	714,549
General and administrative	3,473	(3,021)	38,695	1,939
Depreciation, amortization and accretion	456	1,621	530	5,226
Impairment loss on mineral properties	0	0	0	0
Total Cost and Expenses	248,618	223,875	1,213,329	721,714
Loss from operations	(248,618)	(223,875)	(1,213,329)	(721,714)
Other income (expenses)	(488)	6	(449)	17
Loss before income taxes	$ (249,106)	$ (223,869)	$ (1,213,778)	$ (721,697)