What is the most likely source of heat for contact metamorphism?

Asked By: Flori Osenberg | Last Updated: 25th February, 2020
Category: science geology
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Contact metamorphism occurs adjacent to igneous intrusions and results from high temperatures associated with the igneous intrusion. Since only a small area surrounding the intrusion is heated by the magma, metamorphism is restricted to the zone surrounding the intrusion, called a metamorphic or contact aureole.

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Also to know is, what is the major source of heat for contact metamorphism?

Contact metamorphism occurs typically around intrusive igneous rocks as a result of the temperature increase caused by the intrusion of magma into cooler country rock. The area surrounding the intrusion where the contact metamorphism effects are present is called the metamorphic aureole.

Also Know, what causes contact metamorphism? Contact metamorphism occurs when magma intrudes or forces its way into existing rock. The heat of the magma bakes the surrounding rocks causing them to change. This is a local event. An example of contact metamorphism is the metamorphic rock marble.

Keeping this in consideration, what is the source of heat for contact metamorphic rocks?

AGENTS OF METAMORPHIC CHANGE Heat sources include magma, geothermal heat, and friction along faults. Pressure sources include the weight of overlying rocks deep in the earth. Shear pressure in fault zones can metamorphose rocks at shallower depths.

What happens during contact metamorphism?

Contact Metamorphism occurs when magma comes in contact with an already existing body of rock. When this happens the existing rocks temperature rises and also becomes infiltrated with fluid from the magma. The area affected by the contact of magma is usually small, from 1 to 10 kilometers.

36 Related Question Answers Found

What is a primary difference between phyllite and schist?

Phyllite is a foliated metamorphic rock that is made up mainly of very fine-grained mica. The surface of phyllite is typically lustrous and sometimes wrinkled. It is intermediate in grade between slate and schist. The specimen shown above is about two inches (five centimeters) across.

What are the three agents of metamorphism?

AGENTS OF METAMORPHISM - The agents of metamorphism include heat, pressure (stress), and chemically active fluids. During metamorphism, rocks are often subjected to all three metamorphic agents simultaneously.

Which of the following is a high grade metamorphic rock?

7.2 Classification of Metamorphic Rocks
Very Low Grade High Grade
Granite no change granite gneiss
Basalt chlorite schist amphibolite
Sandstone no change quartzite
Limestone little change marble

What term describes the zone of contact metamorphism?

contact or thermal metamorphism. results from a rise in temperature when magma invades a host rock; occurs in the upper crust (low pressure, high temperature); the zone of alteration forms in the rock surrounding the magma. aureole. zone of alteration. hydrothermal metamorphism.

Can a metamorphic rock be metamorphosed?


The process of metamorphism is one that changes or alters either the mineralogy or the texture, but typically both, of some pre-existing rock. Metamorphic rocks are consequently rocks that have undergone a change or "metamorphosis" from a previous state as a sedimentary, igneous or even another metamorphic rock.

What major changes occurs during metamorphism of limestone to marble?

For example, when the sedimentary rock limestone is metamorphosed by heat into marble, the fine grains of calcite in the original limestone recrystallize into large calcite crystals which interlock to give the emerging marble a course texture.

Which of the following are most susceptible to chemical weathering by dissolution?

Which of the following is/are most susceptible to chemical weathering by dissolution? t/f Abundant moisture and warm temperatures result in high rates of chemical weathering. Frost wedging is the major weathering process contributing to the formation of which regolith material?

Which rock can form in contact metamorphic zone?

The contact metamorphic marbles occur at the contact of the magma or lava with limestones and dolomites. The contact metamorphic quartzites occur at the contact magma or lava with quartz-rich sedimentary rocks (sandstone, siltstone and chert).

Where does most hydrothermal metamorphism occur?


Much hydrothermal metamorphism occurs at the boundaries of oceanic plates. Plates which are moving apart allow seawater to percolate through the oceanic crust. As the seawater migrates, it heats and reacts with the host rock.

How does heat and pressure create metamorphic rocks?

Metamorphic rocks are created by the physical or chemical alteration by heat and pressure of an existing igneous or sedimentary material into a denser form. As the Earth's plates move over geologic time, a plate containing igneous or sedimentary rock may become subducted under another plate.

What two processes can change a rock into a metamorphic rock?

The three processes that change one rock to another are crystallization, metamorphism, and erosion and sedimentation. Any rock can transform into any other rock by passing through one or more of these processes.

What causes the metamorphism of rocks?

There are 3 main agents that cause metamorphism. Factors that cause an increase in Temperature, Pressure, and Chemical changes are the three agents that we are going to study. Temperature increases can be caused by layers of sediments being buried deeper and deeper under the surface of the Earth.

What is the rock cycle diagram?

Rock Cycle Diagram
Rocks are broadly classified into three groups: igneous, sedimentary and metamorphic, and the simplest diagram of the "rock cycle" puts these three groups in a circle with arrows pointing from "igneous" to "sedimentary," from "sedimentary" to "metamorphic," and from "metamorphic" to "igneous" again.

What is the most common metamorphic rock?


Common Metamorphic Rocks:
Common metamorphic rocks include phyllite, schist, gneiss, quartzite and marble.

Where is dynamic metamorphism most likely to occur?

Dynamic metamorphism takes place anywhere that faulting occurs at depth in the crust. Thus, mylonites can be found at all plate boundaries, in rifts, and in collision zones.

How are metamorphic rocks formed step by step?

Metamorphic rocks are created by the physical or chemical alteration by heat and pressure of an existing igneous(formed through the cooling and solidification of magma or lava) or sedimentary(formed from the sand, stones, mud) material into a denser form.