Document and Entity Information (USD $)	3 Months Ended
	Oct. 31, 2012	Dec. 19, 2012	Jan. 31, 2012
Document and Entity Information:
Entity Registrant Name	NORTHERN MINERALS & EXPLORATION LTD.
Entity Central Index Key	0001415744
Amendment Flag	true
Amendment Description	10-Q/A QUARTERLY REPORT ENDING OCTOBER 31, 2012 (REFILED WITH RESTATED STATEMENT OF CASH FLOWS)
Current Fiscal Year End Date	--07-31
Document Type	10-Q
Document Period End Date	Oct. 31, 2012
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Entity Filer Category	Smaller Reporting Company
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding		50,364,842
Entity Public Float			$ 3,600,000