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Gamma ray spectrometry Radioactive prospecting -- Alaska Magnetic prospecting -- Alaska Remote sensing -- Alaska Barrow quadrangle Magnetic anomalies -- Alaska -- Remote sensing Potassium ores -- Alaska -- Remote sensing Thorium ores -- Alaska -- Remote sensing Uranium ores -- Alaska -- Remote sensing Magnetic prospecting -- Yukon River Valley (Yukon and Alaska) Radioactive prospecting -- Yukon River Valley (Yukon and Alaska) Southwest Geology Geology -- West (U.S.) Magnetic anomalies Magnetic anomalies -- Alaska Magnetic anomalies -- Yukon River Valley (Yukon and Alaska) -- Remote sensing Magnetic prospecting Metamorphic rocks Potassium Potassium -- Alaska Potassium -- Yukon River Valley (Yukon and Alaska) -- Remote sensing Radioactive prospecting Remote sensing Remote sensing -- Yukon River Valley (Yukon and Alaska) Southwest -- Remote sensing Structural Thorium Thorium -- Alaska Thorium -- Yukon River Valley (Yukon and Alaska) -- Remote sensing