The type of vein commonly found in igneous rocks is _________

The non-metallic minerals associated with ore minerals are called _________

Deposits that were formed subsequent to the formation of the host rocks are called ________

The deposits occurring close to the roofs of magmatic masses _________

Which of the following is not an essential condition for hydrothermal deposits?

What is the mineral which contains a metallic element which can be economically exploited called?

When gravity is the agent of placing of deposit, the deposit is called _________

Type of veins which are bodies of tubular shape in pre-existing fissures?