Ores and Mining

What do you call an ore deposit where minerals crystallize inside a magma chamber?

• volcanic deposit

• instrusive deposit

• extrusive deposit

• magmatic deposit

What do you call an ore deposit where minerals are concentrated inside veins or fractures of rocks?

• tectonic deposit

• hydrothermal vein deposit

• disseminated deposit

• residual deposit

What do you call a deposit where valuable materials that are segregated by ocean waves based on their densities.

• hydrothermal deposit

• sedimentary deposit

• placer deposit

• oceanic deposit

Open pit mining, strip mining, and dredging are mining methods that all fall under this category.

• surface mine

• subsurface mine

• underground mine

• quarry mine

True or False: Gravel can be considered as an ore.

• True

• False

Magnetite is separated by using an electromagnet. Which stage is this in the process of mining?

• Exploration

• Refinery

• Milling

• Extraction

A geologist confirms that there is a porphyry copper ore deposit. Which stage is this in the mining process?

• Excavation

• Exploration

• Mine Planning

• Refinery

Crushed ores and the separated materials are now cleaned and processed. Which stage is this in the mining process?

• Refinery

• Milling

• Rehabilitation

• Mining

Apart from the Mines and Geosciences Bureau, which national government office is in charge of inspecting and approving mining activities in the country?

• DepEd

• NDRRMC

• DENR

• DOTR

Current Events: Which region in the Philippines is currently experiencing some mining-related conflict with Nickel Asia Corp?

• Region 3

• Palawan

• Zamboanga

• Negros Oriental