Related Clues:

• Mine discovery
• Harbor hazard
• Source of 37-Across
• See 46-Down
• Vein glory?
• Get a lode of this
• Natural resource
• Go for the gold, maybe
• Kind of deposit
• Cinnabar, for one
• Prospector's prize
• Blast furnace input
• Harbor danger
• Assayer's subject
• Sourdough's strike