What Is The Most Likely Source Of Heat For Contact Metamorphism

Table of Contents

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.

Would regional metamorphism be most likely?

In which setting would regional metamorphism be most likely? At great depths in the crust where two continents are colliding.

What is the main agent of contact metamorphism?

This heat can be sufficient to cause metamorphism, which, because it occurs at the contact with the igneous body, is called CONTACT METAMORPHISM. Because the primary metamorphic agent in this situation is heat and not pressure, the rocks produced by contact metamorphism are never foliated.

Where does thermal metamorphism occur?

Contact (thermal)

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.

What are the general temperature pressure conditions for contact metamorphism?

Metamorphism, therefore occurs at temperatures and pressures higher than 200oC and 300 MPa. Rocks can be subjected to these higher temperatures and pressures as they are buried deeper in the Earth. Such burial usually takes place as a result of tectonic processes such as continental collisions or subduction.

What is the highest grade of regional metamorphism?

Gneiss, the highest grade metamorphic rock, contains bands of easily visible quartz, feldspar, and/or mica.

Which of the following describes the conditions of contact metamorphism?

Which of the following 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.

Which one of the following is not likely to be genetically associated with impact of an asteroid?

Geology

Question Answer
Which one of the following is not likely to be genetically associated with impact of an asteroid or large meteorite? blueschists
Which of the following metamorphic rocks could be used to neutralize acidic mine waters? marble/limestone

What is the source of increasing heat and pressure in regional metamorphism?

Regional metamorphism results in intense alteration of the mineralogy and texture of rocks, usually to the point where original sedimentary structures are destroyed. Regional metamorphism is primarily due to tectonic forces associated with the interaction between lithospheric plates.

What are the sources of heat or thermal energy that produces metamorphism?

There are two main mechanisms of metamorphism, heat and pressure. HEAT: There are two sources of heat, one comes from the geothermal gradient - the increase in temperature that occurs with increase in depth in the earth.

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.

Where would you most likely find contact metamorphism quizlet?

In which location are you most likely to find contact metamorphism occurring? The Cascade Mountains.

What is thermal metamorphism?

A type of metamorphism resulting in chemical reconstitution controlled by a temperature increase, and influenced to a lesser extent by confining pressure; there is no requirement of simultaneous deformation.

Where does most metamorphism occur?

Where does most metamorphism take place? Most metamorphism takes place in a zone that begins several kilometers below the surface and extends into the upper mantle. Compare and contrast contact metamorphism and regional metamorphism.

How is contact metamorphism different from regional metamorphism?

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.

How do temperature and pressure affect metamorphism?

Metamorphism occurs because some minerals are stable only under certain conditions of pressure and temperature. When pressure and temperature change, chemical reactions occur to cause the minerals in the rock to change to an assemblage that is stable at the new pressure and temperature conditions.

What is the role of heat and pressure to metamorphism?

Metamorphic rocks form when heat and pressure transform an existing rock into a new rock. Contact metamorphism occurs when hot magma transforms rock that it contacts. Regional metamorphism transforms large areas of existing rocks under the tremendous heat and pressure created by tectonic forces.

What is the average temperature for the start of metamorphism?

This metamorphism typically starts at depths ranging between 6 to 10 km where rocks undergo a pressure of about 3000 bar and temperatures are comprised between 100 and 200°C.

Which metamorphic change is brought about primarily by heat?

When granite is subjected to intense heat and pressure, it changes into a metamorphic rock called gneiss. Slate is another common metamorphic rock that forms from shale.

What type of metamorphism is caused by high temperature and high pressure imposed over a large volume of crust?

Cards

Term Which of the following properties does not depend on the chemical composition of an igneous rock/magma? Definition grain size
Term What type of metamorphism is caused by high temperature and high pressure imposed over a large volume of crust? Definition regional

What is the correct order of metamorphic grade from lowest to highest?

Correct! Metamorphic grade is the degree to which pressure and temperature have altered parent rock. Rocks start as a protolith and progress up from low grade to high grade. Foliated metamorphic rocks increase metamorphic grade from slate→phyllite→schist→gneiss.

Which of the following best describes the effect of heat as a metamorphic agent?

Which of the following best describes the effect of heat as a metamorphic agent? Heat is the most important agent of metamorphism because it provides the energy necessary for chemical reactions to occur within the rock.

Where is contact metamorphism found?

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.

Which metamorphism is affected by heat and reactive fluid?

During metamorphism, protolith chemistry is mildly changed by increased temperature (heat), a type of pressure called confining pressure, and/or chemically reactive fluids. Rock texture is changed by heat, confining pressure, and a type of pressure called directed stress.

Is a Nonfoliated rock formed by contact metamorphism of a shale or mudstone?

Hornfels. Hornfels is another non-foliated metamorphic rock that normally forms during contact metamorphism of fine-grained rocks like mudstone or volcanic rocks.

Which of the following is not an agent cause of metamorphism?

During metamorphism, rocks are often subjected to all three metamorphic agents simultaneously. However, the degree of metamorphism and the contribution of each agent vary greatly from one environment to another Decomposition is not the agent of metamorphism.

What metamorphic environment produces tektites?

What metamorphic environment produces tektites? high temp. associated with meteorite impact.

What is the heat source in regional metamorphism?

At shallow depths within the crust (usually less than 6 km) the heat sources responsible for contact metamorphism are bodies of hot magma (e.g. igneous intrusions) which raise the temperature of the surrounding rocks.

Which of the following is a contact metamorphic rock?

The area affected by the contact of magma is usually small, from 1 to 10 kilometers. Contact metamorphism produces non-foliated (rocks without any cleavage) rocks such as marble, quartzite, and hornfels.

What is the source of pressure required for metamorphism to occur?

The pressure experienced by a rock during metamorphism is due primarily to the weight of the overlying rocks (i.e., lithostatic pressure) and is generally reported in units of bars or kilobars.

How is contact metamorphism produced?

As discussed previously, contact metamorphism occurs as a result of a high geothermal gradient produced locally around intruding magma. The area surrounding an igneous intrusion that has been metamorphosed as a result of the heat released by the magma is called a contact aureole.

Why is heat the most important agent of metamorphism?

Heat as a Metamorphic Agent - The most important agent of metamorphism is heat because it provides the energy to drive the chemical changes that result in the recrystallization of minerals. Heat my derived from intrusion of molten material rising from below.

What common rock does contact metamorphism of limestone create?

Limestone will be metamorphosed to marble, and sandstone to quartzite. A hot body of magma in the upper crust can create a very dynamic situation that may have geologically interesting and economically important implications.

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.

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 two main sources of heat for metamorphism quizlet?

Quartzite and anthracite are examples. The most important agent of metamorphism. It provides the energy needed to drive chemical reactions. The heat for metamorphism comes mainly from two sources-magma and the change in temperature with depth.

Where does the heat that causes metamorphism come from?

The heat and pressure comes from inside the earth. From the upper mantle up to within a few kilometers of the surface of the earth there is a tremendous amount of heat and pressure. This heat and pressure increase with depth. It is estimated that the temperature increases about 20o to 30o C per kilometer of depth.

Where are you likely to find metamorphic?

We often find metamorphic rocks in mountain ranges where high pressures squeezed the rocks together and they piled up to form ranges such as the Himalayas, Alps, and the Rocky Mountains. Metamorphic rocks are forming deep in the core of these mountain ranges.

Which type of rock is most likely to form because of high heat and pressure quizlet?

Increased heat and pressure will change the sedimentary rock into metamorphic rock. A sedimentary rock along a plate boundary is forced below another plate during subduction.

Leave a Comment

Your email address will not be published.