Magma Flashcards
A mixture of molten rocks
Magma
Temperature of magma
700-1300
Magma formation
Melting of the upper mantle or and lower crust
Heat is comming from the hotspots
Increasing temperature
Flux melting
Addition of volatiles
Where flux melting happens
Subduction zones
Found in divergent plate
Decompression melting
Provess where magma can produce different number of igneous rock composition
Magma differentiation
Melting of the country rock
Assimilation
Mixing of two or more magma
Magma mixing
Process of crystallizinf and removing minerals from the magma
Fractional crystallization
Discontious series of bowens reaction series
Olivine
Pyroxene
Amphibole
Biotite
Continous series
Anorthite
Bytownite
Labradorite
Andesite
Orthoclase
Albige
Have high gas content
Rhyolitic
Felsic
Rhyolitic
Most explosive
Rhyolitic
Raryly explosive
Basaltic
Have least silica content
Basaltic
Have high silica content
Rhyolitic
Highest meling temperature
Basaltic
It refers to molten state of the magma
Melt
One its is close to the original composition and did not undergone fractional crystallization
Primary melt
The processes magma
Parental melt
Minerals with lower melting points turn into miquid magma, those who have higher melting point remains as a crystal
Partial melting
Rocks that are produced by partial melting
Alkaline, potassic, peralkaline
magma cools and minerals start to solidify and form igneous rock
Magma cooling
Magma rises when it is less dense than the surrounding rock or the structure allows it
Magma migration
Low degrees of partial melting of the crust may create
Pegmatite
melting point lower than its chemical components
Eutectic
two or more solid phases crystallize simultaneously without resorption from a liquid
Cotectic
Elements that are too large or too highly charged to fit easily with common minerals.
Incompatible elements
Elements that easily fits into minerals
Compatible elements
Temperature of basaltic magma
1000-2000
Temp of andesitic magma
800 to 1000
Temp of rhyolitic magma
650-800
