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Author Question: What is the definition of a placer deposit? A) Sorting of particles by a water current according ... (Read 52 times)

cool

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on: Jul 15, 2018
What is the definition of a placer deposit?
 
  A) Sorting of particles by a water current according to a material's specific gravity
  B) Emplacement of hydrothermal fluids into a fracture
  C) Concentration of minor amounts of metals in soil via weathering
  D) Metallic deposit near the base of a black smoker due to precipitation

Question 2

________ occurs when weathering concentrates minor amounts of metals scattered through unweathered rock into economically valuable concentrations.
 
  A) Passive collection
  B) Secondary enrichment
  C) Concentration
  D) Hydraulic fracturing


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phuda

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Reply #1 on: Jul 15, 2018
Answer to Question 1

Answer: A

Answer to Question 2

Answer: B


cool

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Reply 2 on: Jul 15, 2018
Gracias!

dyrone

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Reply 3 on: Yesterday
Wow, this really help

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