Question

27. Explain three primary structural controls which may influence ore 28. How does the ore deposit...

27. Explain three primary structural controls which may influence ore

28. How does the ore deposit in the CM bed of the Pioche district indicate the

29. Explain why faults which have undulatory fault planes, only a small amount deposition importance of chemical controls in ore deposition? of displacement, and penetrate silicified rock are more likely ore hosts tharn large displacement faults with smooth fault planes penetrating shale

30. Explain two reasons why skarn makes a good host rock for tungsten

Homework Answers

Answer #1

27) Three primary structural controls which can influence ore are:

1.       Permeable (elastic) limestone or dolomite, especially where it is dammed by impermeable cap rocks;

2.       Well-sorted conglomerates that permit easy circulation of ore-bearing fluids; 3. broken and permeable tops of lava flows, which also permit ready circulation of ore­ bearing fluids;

3.       Permeable sandstones, especially channel sands and beach deposits.

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