Contact metamorphism occurs due to
heating, with or without burial, of rocks that lie close to a
magma intrusion. It is characterized by low P/T gradients, as strong thermal gradients between an intruding magma and adjacent country rock are best established at shallow crustal levels.
What is the main factors of contact metamorphism and regional metamorphism?
Lesson Summary
Contact metamorphism is a type of metamorphism where rock minerals and texture are changed,
mainly by heat, due to contact with magma
. Regional metamorphism is a type of metamorphism where rock minerals and texture are changed by heat and pressure over a wide area or region.
Which factor of metamorphism is the most important?
- Metamorphic rock. rock within the Earth’s crust that has been transformed by heat, pressure, or. …
- Agents of metamorphism-heat. is the most important factor in metamorphism. …
- The sources of heat for metamorphism. …
- Agents of metamorphism- Pressure. …
- Pressure. …
- Pressure. …
- Chemically. …
- Metamorphic fabrics.
What are the two most important sources of heat for metamorphism?
Heat that results in metamorphism is the result igneous intrusions and from deep burial. The two most important sources of heat for metamorphism are: A) intrusive magma bodies and deep burial.
What is the main factor that causes contact metamorphism quizlet?
Contact metamorphism is caused by
heat from a magmatic intrusion
. Rocks located close to the intrusion of magma will be highly metamorphosed.
What are the 2 types of metamorphism?
- Contact metamorphism—occurs when magma contacts a rock, changing it by extreme heat (Figure 4.14).
- Regional metamorphism—occurs when great masses of rock change over a wide area due to pressure exerted on rocks at plate boundaries.
What are the three most important kinds of metamorphism?
Three types of metamorphism exist:
contact, dynamic, and regional
. Metamorphism produced with increasing pressure and temperature conditions is known as prograde metamorphism. Conversely, decreasing temperatures and pressure characterize retrograde metamorphism.
What’s the difference between regional metamorphism and contact?
Metamorphism is the solid change in minerals and textures in a pre-existing rock (country rock) due to changing pressure / temperature conditions. Conversely, contact metamorphism usually occurs under higher temperature conditions associated with ignorant intrusions on a smaller scale. …
What are the 5 factors that influence metamorphism?
- Temperature and pressure. Temperature and pressure are important factors in determining the new minerals that form in a metamorphic rock. …
- Water. …
- Geostatic pressure. …
- Differential stress. …
- Figure 1.
- Differential Stress.
- Compressive stress. …
- Figure 2.
What are three main agents of metamorphism?
The most important agents of metamorphism include
temperature, pressure, and fluids
.
What are factors of metamorphism?
- The mineral composition of the parent rock.
- The temperature at which metamorphism takes place.
- The amount and type of pressure during metamorphism.
- The types of fluids (mostly water) that are present during metamorphism.
- The amount of time available for metamorphism.
Where does contact metamorphism occur?
Contact metamorphism is thus primarily a thermal phenomenon. It may occur in diverse tectonic settings such as
in orogenic or anorogenic environments
, in plate interiors or along plate margins.
What is the major source of heat for contact metamorphism quizlet?
What best describes the conditions of contact metamorphism? Pressures are fairly low, the rock may be in the upper part of the crust, and heat is supplied from
a nearby magma body such as a pluton, dike, or sill
.
What are the 4 main types of metamorphism?
- Type # 1. Contact Metamorphism:
- Type # 2. Regional Metamorphism:
- Type # 3. Hydro-Metamorphism:
- Type # 4. Hydro-Thermo-Metamorphism:
What are the two most common types of metamorphic rocks?
Common metamorphic rocks include
phyllite, schist, gneiss, quartzite and marble
. Foliated Metamorphic Rocks: Some kinds of metamorphic rocks — granite gneiss and biotite schist are two examples — are strongly banded or foliated.
What are the six kinds of metamorphism?
- Type # 1. Contact or Thermal Metamorphism:
- Type # 2. Hydrothermal Metamorphism:
- Type # 3. Regional Metamorphism:
- Type # 4. Burial Metamorphism:
- Type # 5. Plutonic Metamorphism:
- Type # 6. Impact Metamorphism:
