11 Questions
What type of rock are pegmatites?
igneous
What are some rare metals associated with pegmatites?
Li, Be, Nb, Ta, Sn, U
What is the central process of rare earth element (REE) enrichment in pegmatites?
melt fractionation
What is the characteristic size of crystals in pegmatites?
several centimeters to meters
What is liquid immiscibility in the context of magma chambers?
Different liquid phases that do not mix and have distinct chemical compositions and properties.
Give an example of a magmatic segregation deposit and list the elements it contains.
The Bushveld Complex in South Africa, which contains platinum group elements, chromium, and vanadium.
How can magmatic segregation lead to the formation of mineral deposits?
By concentrating certain elements in specific liquid phases and forming different mineral assemblages.
What are the two types of sulfidation deposits based on the amount of sulfide minerals present?
High-sulfidation and low-sulfidation
Where are high-sulfidation deposits typically formed?
In volcanic environments
What metals are commonly found in high-sulfidation deposits?
Gold, silver, copper, zinc, lead, and mercury
In what type of areas are low-sulfidation deposits typically formed?
In areas of less intense volcanic activity, such as in the upper levels of epithermal systems
Learn about sulfidation, a type of mineralization that occurs in epithermal deposits formed by the upward movement of hydrothermal fluids through the Earth's crust. Understand the process of sulfide ion precipitation and its geological implications.
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