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← GeographyWhich mechanism explains elevated mercury levels in soils near strike-slip faults?
A)Hydrothermal fluid migration through fractures✓
B)Weathering of sulfide deposits on fault surfaces
C)Uplift and erosion of mercury-rich bedrock
D)Atmospheric deposition of volcanic emissions
💡 Explanation
Along strike-slip faults, continuous movement creates pathways for hydrothermal fluids because faulting and fracturing increase permeability in rocks allowing mercury containing fluids to migrate upwards. Therefore, hydrothermal migration explains elevated mercury rather than weathering, uplift/erosion, or atmospheric deposition requiring very different geological processes.
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