Podcast
Questions and Answers
What is the key process involved in the migration of hydrothermal fluids in ore formation?
What is the key process involved in the migration of hydrothermal fluids in ore formation?
- Percolation through any type of rock
- Fluid flow along interconnected cracks and fractures (correct)
- Sudden expulsion from the volcanic system
- Random dispersion throughout the rock matrix
In hydrothermal systems, the geometry of ore bodies is primarily dependent on:
In hydrothermal systems, the geometry of ore bodies is primarily dependent on:
- The type of hydraulic equipment used in the process
- The geometry of the fluid conduits (correct)
- The size of the mineral grains within the ore
- The color of the surrounding rocks
What type of structures are preferred for fluid focussing in ore formation?
What type of structures are preferred for fluid focussing in ore formation?
- Flat, horizontal layers of rocks
- Mountainous terrain
- Shear zones, faults, breccias, and stockworks (correct)
- Rounded boulders
What factor plays a significant role in concentrating dissolved constituents into a portion of the Earth's crust for ore formation?
What factor plays a significant role in concentrating dissolved constituents into a portion of the Earth's crust for ore formation?
Which type of flow helps define the geometry of the orebody in hydrothermal systems?
Which type of flow helps define the geometry of the orebody in hydrothermal systems?
What characteristic defines the migration of fluid along shear zones to provide geometric focusing and enhanced fluid interaction?
What characteristic defines the migration of fluid along shear zones to provide geometric focusing and enhanced fluid interaction?
What is the driving mechanism for fluid migration in hydrothermal systems?
What is the driving mechanism for fluid migration in hydrothermal systems?
How does fluid convection around a magmatic intrusion occur?
How does fluid convection around a magmatic intrusion occur?
What controls the precipitation of metals from hydrothermal fluids?
What controls the precipitation of metals from hydrothermal fluids?
What is the primary mechanism for extracting metals from hydrothermal fluids?
What is the primary mechanism for extracting metals from hydrothermal fluids?
Which factor contributes to fluid migration in hydrothermal systems due to rock deformation?
Which factor contributes to fluid migration in hydrothermal systems due to rock deformation?
What causes the metal to be deposited in the host rock in hydrothermal systems?
What causes the metal to be deposited in the host rock in hydrothermal systems?
What results in the loss of volatiles like CH4 and CO2 in hydrothermal systems?
What results in the loss of volatiles like CH4 and CO2 in hydrothermal systems?
Which reduction mechanism causes reduced volatile species to partition more readily into the vapor phase?
Which reduction mechanism causes reduced volatile species to partition more readily into the vapor phase?
What does an increase in the pH of the residual fluid indicate in hydrothermal systems?
What does an increase in the pH of the residual fluid indicate in hydrothermal systems?
How do rapid pressure releases occur in hydrothermal systems?
How do rapid pressure releases occur in hydrothermal systems?
What leads to an increase in the oxygen fugacity (fO2) of the fluid in hydrothermal systems?
What leads to an increase in the oxygen fugacity (fO2) of the fluid in hydrothermal systems?
What increases the ratio of SO4 to H2S (SO4²⁻/HS⁻ ratio) in the residual ore fluid?
What increases the ratio of SO4 to H2S (SO4²⁻/HS⁻ ratio) in the residual ore fluid?
