EOSC CYU Questions with All Correct Answers

EOSC CYU Questions with All Correct Answers What type of deposit is the majority of copper in Canada found in? (L30) - Answer- Porphyry deposits If a mineral resource is close to the surface and extensive in size, which method would you most likely use to extract it? (L31) - Answer- Open Pit Placer deposits form when ore is: (L31) - Answer- Eroded from its original source and deposited after alluvial transport Consider the Kimberley Process, Fair Trade principles, and the Chain of Custody concept. Which of the following are true statements? (L32) - Answer- The Kimberley Process prevents conflict rough diamonds from entering the market. The history of coinage dates back to at least how far?( L34) - Answer- 2500 years What country was predicted to be the largest consumer of jewellery in 2015? (L34) - Answer- The US V3+ (vanadium) substitutions for Al3+ (aluminum) result in which gemstone variety of beryl? (L15) - Answer- Emerald Mn3+ (manganese) substitutions for Al3+ (aluminum) result in which gemstone variety of beryl? (L15) - Answer- Morganite What is a common treatment for emeralds? (L15) - Answer- Oiling True or False: Beryl is harder than Quartz. (L15) - Answer- True Where did the beryllium (Be) that formed the famous Colombian emeralds come from? (L16) - Answer- Hydrothermal fluids Why is aquamarine relatively rare? (L16) - Answer- Aquamarine requires beryllium (Be) to form, and there is very little Be in the Earth's crust. In which of the following geologic settings could it be possible to find emerald? (Select all that apply.) (L16) - Answer- In Cr-bearing host rocks that border a pegmatite & In a secondary eluvial deposit. What are considered the Big Three coloured gemstones? (L17) - Answer- Rubbies, Sapphires and Emeralds