Unit 4 Economic Geology T/F

Economic minerals are those that can be extracted, processed, and marketed for a profit.

• True

• False

Ore is a type of rock that contains minerals with unimportant elements.

• True

• False

1. Hydrothermal deposits are formed by volcanic eruptions.

• True

• False

1. Secondary enrichment of ores occurs through initial concentration during magma cooling.

• True

• False

1. Bauxite is the principal ore of Aluminum

• True

• False

1. Open-pit mining is always environmentally friendly.

• True

• False

1. Gravity separation is based on density differences between minerals.

• True

• False

1. Pyrometallurgy involves using chemicals to separate minerals from ore.

• True

• False

1. Petroleum is primarily formed from the decay of organic matter.

• True

• False

1. Diagenesis is the final phase in the evolution of organic matter to petroleum.

• True

• False