7107883
Description
Flashcards by Annabel Martin, updated more than 1 year ago
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Created by Annabel Martin
over 8 years ago
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| Question | Answer |
| Geochemical Analysis | Purpose: To find an economic deposit of a mineral. How: Collect and analyse water from a range of sites. If deposit is present, water has permeated through and will pick up the mineral The higher concentration is downstream the ore body. |
| Seismic Survey | Purpose: Exploration for oil such as hydrocarbon oil and gas How: A ship toes a source of seismic waves that travel to the ocean floor through rocks and get reflected where a change of density is. This detects change in rock type and reflected waves travel back to the ocean floor to the receivers on the cable. |
| Magnetic Survey | Purpose: To detect anomalies in Earth's magnetism. How: Flights over the area detect magnetic anomalies and are downloaded where software highlights these areas. These could be metallic minerals or igneous bodies etc. |
| Drilling Boreholes | Purpose: To confirm presence of rocks. How: A borehole is drilled into the ground (not too deep) and the core it produces is analysed. Very expensive but most accurate. |
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