Balkhab (Persian: بلخاب‎) is a district of Sar-e Pol Province, Afghanistan. The district seat lies at Balkhab, also known as Tarkhoj. Coal is mined in the area. A massive copper deposit is also located in Balkhab district of Sar-e pol province, the new copper discovery is bigger than the current Aynak copper deposit in Logar province, southeast of Kabul, according to a GSA report. It is valued at billions of U.S. dollars and one of the biggest untapped copper mines in Afghanistan. The discovery appears to be a volcano genetic massive sulfide deposit—a deposit type which could supply much of the world's gold, copper, lead and zinc. On October 5, 2018 in Washington, D.C., Afghan officials signed a 30-year contract for a copper mining project involving a $56 million investment by investment g