This article outlines mineral exploration, mining, and petroleum activity that occurred in Alaska during 1979. Small placer mines, located in the state's known gold placer districts, increased total production during the year, but reduced production from the leading gold producer caused an overall decline in total gold production. Sand and gravel production, coupled with crushed stone, produced the largest revenues in the mineral industry. Coal production was limited to a single operation that produced approximately 730,000 short tons of coal. Mineral exploration was at a slightly reduced level compared with the previous year. Major companies explored on the Seward Peninsula, the De Long Mountains, Brooks Range, interior Alaska, and southeastern Alaska. Extensive exploration for outlining ore body configuration occurred at Greens Creek and Quartz Hill. Daily oil production during 1979 reached over 1.4 million barrels per day, putting Alaska in 2d place among the 50 states for daily oil production. The proposed natural gas line received approval by the Department of the Interior, but actual construction is running into financial difficulties. The first oil and gas lease sale since 1974 was conducted during 1979.