In your dreams.
Contribution and investments are two totally different things. The more than 55trillion cf Tanzania LPG Sector alone needs investment worth $50B to be productive , iron ore are capital intensive industry, a minimum of $4 billion is needed, a gold processing plant, diamond plant....... Gold alone contributes $1Billion to the Tz economy, so 6% to GDP is actually a lot! Remember mining revenues doesn't come all at once, each year its 6%, after 10 years it will cumulatively be 100% of Today's Tanzanian GDP