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Recrystallization
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What causes minerals to form large and small crystals within the same rock?
Recrystallization. Recrystallization is a process whereby small crystals of one mineral will slowly convert to fewer, larger crystals of the same mineral, without melting of the rock.
What is recrystallization?
Recrystallization is a process in which rocks actually change. It is whereby the crystals of one mineral slowly convert to few but larger crystals of the same mineral with out melting the rock. It is them followed the the process of neomorphism then metasomatism.2.Crystallization is the (natural or artificial) process of formation of solid crystals from a homogeneous solution or melt, or more rarely directly from a gas. This process is often used as a technique to separate a solute from a liquid solution, bringing it into a pure crystalline phase.
How does a basalt differ from gabbro?
Gabbro has much larger grains that basalt does. This is because basalt cools faster than gabbro and has less time to form crystals.
Can crystals grow larger during metamorphism?
Yes. Through the process of recrystallization.
What is the affect of temperature on crystal growth?
Temperature doesn't really affect the crystal size; the rate of cooling is the major factor. The faster the mineral, rock, etc. (whatever has the crystals) cools, the smaller the crystals- the slower the larger. If you were "growing" crystals with a set, the warmer the temperature generally means the larger the crystals.
What process has to take in order togrow crystals?
Metamorphization-the process of heating and putting stone under great amounts of pressure. The slower the rocks cool, the larger the crystals.
Do rocks that cool slowly from magma contain more crystals?
No. They would contain fewer, but larger mineral crystals when compared to igneous rocks which have cooled quickly from lava or magma.
Does slow cooling of molten rock lead to formations of large crystals?
Slow cooling of molten rock leads to rocks with an phaneritic texture; one with larger, visible mineral crystals.
What does mineral crystal size tell about how rock formed?
The size of the crystal relates to how long the crystals were forming. For example crystals that cooled slowly are larger than those cooling faster.
Does molten rock contain large crystals?
Completely molten rock would not contain any crystals. Most magmas, however, are a mixture of molten and solid crystals of some sort. It is possible that a magma could contain larger crystals of a specific mineral.
Does intrusive rock have smaller crystals than extrusive rock?
No. Intrusive rocks have larger crystals because of the increased time that the magma had available to cool. Elements necessary for mineral crystal growth can migrate more freely and thus form larger crystals during an extended fluid phase.
Is the crystal in the igneous rock large if it cools slowly from magma?
Yes. Slow cooling magma produces larger mineral crystals.
