Complex sentence: Gold, iron ore and base metals are mined with the Hassai gold mine located 500km to the northeast of Khartoum being the only gold mine in the country with a production capacity of 90 000 oz/year.
Split into simpler sentences: Gold, iron ore and base metals are mined in the Hassai gold mine, located 500km to the northeast of Khartoum. It is the only gold mine in the country with a production capacity of 90 000 oz/year.