Explain which type of melting (flux, decompression, heat transfer) is responsible for mafic magmas in each of the following plate-tectonic settings and why the resulting magma is mafic.

Answers

Answer 1

Solution :

The type of melting that is responsible for the mafic magmas for the following plate tectonic settings :

a). Mid - ocean ridges

At the mid oceanic ridges, the two plates diverges away and the new oceanic crust is formed by the effusion of the magma. The earth's interior is exposed as the two plates are moved away.

b). Continental rift :

A new oceanic crust is formed by the effusion of the magma and the two plates diverges away. Thus it causes the formation of the melt in the continental drift. As a result, the crustal thickness decreases.

c). Oceanic and continental volcanic arc :

The oceanic arc and the volcanic arc are the locations of the convergence. The denser plate of the arcs subducts under the less denser plates or the  lighter plates and it moves downwards into the mantle, which causes the increase in temperature of the surroundings.

Answer 2

The magma is formed due to the mixing of molten and semi-molten rock that is below Earth's surface.

Mid-ocean ridges: It is caused due to decompression melting that melts the rocks with increased pressure levels. Thus, mafic magma tends to arise at mid-ocean ridges because ultramafic rock peridotite starts to melt.

Continental rift: Decompression melting again is responsible as there is a decrease in pressure but no decrease in temperature. Thus, the magma here is mafic because there is a rise in the asthenosphere undergoing decompression.  

The oceanic and continental volcanic arc: Here, heat transfer leads to the melting of rock mixture that creates volcanos. Thus, the mafic magma arises due to hydrous minerals.

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Related Questions

name one natural phenomenon in which a spectrum can be seen? ​

Answers

Answer:

A rainbow is an optical and meteorogical phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured arc.

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How do the final two sentences of the section "The
Flow Of History" contribute to the article?

Answers

Answer:

History plays an important role in the development of a country. For example, the United States would be a different country today if France or Spain had ruled us instead of Great Britain. We might have a different form of government. ... When a country is involved in wars, it will impact the country.

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Explanation:

The Supreme Court supported which of the
following in arguments over the Indian
Removal Act?
A. Cherokee
B. National Government
C. State of Georgia

Answers

Answer:

A. Cherokee

Explanation:

the Court heard two cases dealing with conflicts between the state of Georgia and the Cherokee Nation. Although the Court ruled in favor of the Cherokee, Georgia ignored the decision and in 1838 the Cherokee were forcibly relocated to present-day Oklahoma.

The particular animals of a given geographic region are called its __________.
A.
flora
B.
fauna
C.
packs
D.
herds

Please select the best answer from the choices provided.

A
B
C
D

Answers

Answer:

it must be fauna coz flora is for plants

Answer:

b) fauna

Explanation:

just took the test

What Are the Distinct characteristics and activities in western region Ghana

Answers

Cape Three Points, Fort Metal Cross, Fort Santo Antonio, and Fort Batenstein are all places to visit and do activities

All of the following statements are true regarding non-government organizations EXCEPT:

Answers

Answer:

The answer is; C

Explanation:

Non-governmental institutions are independent of governments hence do not identify themselves with any government   or state. They are mainly involved in humanitarian works, and societal building roles especially in less developed societies. Their workings are not intended for any profits and are usually funded through donations.

(Missing!) Background Knowledge:

Assuming that the following statements are these -

A. Non-government organizations aid in human interests.

B. Non-government organizations are companies that are not for profit.

C. Non-government organizations identify with a specific government.

D. Non-government organizations are also referred to as relief organizations.

If God exists and he (or she) revealed themselves, would people who believe in God actually accept God as God? :-'|​

Answers

Answer:

as I do believe in God it really depends on the person and there connection with God and If they do believe in God but I belive that God has no gender that God is God and someone else may believe different and that's okay and I respect that

Question 7
Which of the following is true of skeletal muscle tissue?
A
Each cell has a single nucleus.
B
A muscle cell is composed of hundreds of muscle fibers.
Askeletal muscle fiber typically contains a sarcolemma, t-tubules, and myofibrils.
D
Skeletal muscle cells have the same shape as smooth muscle cells.

Answers

Answer:

A skeletal muscle fiber typically contains a sarcolemma,  t-tubules, and myofibrils.

Explanation:

I hope this helps

The correct answer to the given question is C. Because of the following reasons

Skeletal muscle tissue is multi nucleated, cylindrical fiber which are soft and fragile.

Skeletal muscle fiber is surrounded by a plasma membrane called sarcolemma.

They provide pathways for passage of blood vessels and nerves.

These tissues are found in muscles which is directly attached to the skeleton.

The correct answer is C.

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3. When harmful gases, such as sulfur dioxide and nitrogen oxide, react with water in the
atmosphere, they can produce
4. The agent of erosion involved in stream erosion is

Answers

Answer:

3. when harmful gases,such as sulfur dioxide and nitrogen oxide,react with water In the atmosphere,they can produce acidic rain.

4. the agent of erosion involved in stream erosion is water.

I hope this helps

Which of the following best describes the relationship between water
regulation and globalization?
A. The countries that regulate water are causing conflict with those that do not
B. Water should be regulated for tax income.
C. With a growing population, the world needs clean water.
D. Water is a renewable resource, freely available to all countries.

Answers

Answer:

With a growing population,the world needs clean water

Pyroclastic material includes lava that hardens in the air during eruption.

a. True
b. False

Answers

True, a common cause of Pyroclastic flows is gassed expelled from a volcano during an eruption as well as dense, fast moving solidified lava pieces.
True Pyroclastic flows contain a high-density mix of hot lava blocks, pumice, ash and volcanic gas. They move at very high speed down volcanic slopes, typically following valleys.

mối quan hệ giữa quá trình nội lực và ngoại lực

Answers

Answer:

The importance of categorizing a force as being either internal or external is related to the ability of that type of force to change an object's total mechanical energy when it does work upon an object. When net work is done upon an object by an external force, the total mechanical energy (KE + PE) of that object is changed.

Explanation:

in vietamnise/

Tầm quan trọng của việc phân loại một lực là bên trong hoặc bên ngoài có liên quan đến khả năng của loại lực đó để thay đổi tổng năng lượng cơ học của một vật thể khi nó hoạt động trên một vật thể. Khi công việc ròng được thực hiện trên một đối tượng bởi một ngoại lực, tổng năng lượng cơ học (KE + PE) của đối tượng đó được thay đổi.

Discuss the advantages of relative location for commercial activities

Answers

Answer:

Relative location shows how things are related by technology, distance or culture.

Explanation:

The advantages of relative location for commercial activities are: forming a sense of community by getting to know your customers better, having repeat customers who are more likely to be loyal because they live in close proximity, the ability to advertise locally which can attract new customers, you can reward local customers which can increase loyalty, and can contribute to the local community by benefiting customers and local nonprofits.  

Answer:Relative location for commercial activities not only cost effective but also targets a larger audience. When you refer to a place using relative location, more number of people are able to relate to it. New customers are attracted when relative location is used for commercial activities

Explanation:

What is the current state of Communist China in the 21st century?

Answers

Answer:

China’s Communist Party turns a century old this July, a milestone that Beijing is celebrating with a crescendo of fireworks, theatrics and a fervent campaign to honor its revolutionary past.

The party has often lurched between tragedy and triumph between its birth as an underground movement and its current dominance over the world’s most populous nation. It seized power in 1949, and its early decades in government were tumultuous, with Mao Zedong launching radical purges and a disastrous industrial program that led to one of the deadliest famines in history.

Mao’s death in 1976 precipitated political and economic changes under Deng Xiaoping that would transform an impoverished nation into a global economic powerhouse.

Describe a very morning on way to school​

Answers

I would be all ready in my clothes and make sure I have all the materials I need for the day!!!

what is contour line

Answers

Explanation:

a line on a map joining points of equal height above or below sea level.

Answer:

Hey mate.....

Explanation:

This is ur answer....

A contour line is a line drawn on a topographic map to indicate ground elevation or depression. A contour interval is the vertical distance or difference in elevation between contour lines. Index contours are bold or thicker lines that appear at every fifth contour line.

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A family that includes a mixture of parents and children unrelated by blood is
also described as a(n):

A. Biological family.
B. Multigenerational family
C. Blended family
D. Extended family

Answers

Answer:

Blended Family: A mixture of parents and children unrelated by blood

Explanation:

Here's the other fours' def:

Blended Family: A mixture of parents and children unrelated by blood Extended Family: Multiple generations and members related by both blood and marriage

Fictive Family: A group of people who are not related but use family titles to refer to each other

Nuclear Family: Married parents and their biological children

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A family that includes a mixture of parents and children unrelated by blood is blended family

Nicobar island as well as _______ island belong to the geographical of Asia​

Answers

Answer:

Andaman

is right answer I hope it's helpful

*********ANDAMAN*************

.

.i don't want points

Underline the best answers.
1.09) The (Equator, Prime Meridian, Latitude) runs north to south through
Greenwich, England.

Answers

What exactly here is the question

two reasons why eastern cape has the lowest percentage of households living in formal dwellings​

Answers

Answer:

Because there's less agricultural activities coursed by less fertile soild, dry climate

2. Given 4(-x + 4) = 12 Prove x = 1​

Answers

Solve the equation

[tex]\\ \sf \longmapsto 4(-x+4)=12[/tex]

[tex]\\ \sf \longmapsto -4x+16=12[/tex]

[tex]\\ \sf \longmapsto -4x=12-16[/tex]

[tex]\\ \sf \longmapsto -4x=-4[/tex]

[tex]\\ \sf \longmapsto x=\dfrac{-4}{-4}[/tex]

[tex]\\ \sf \longmapsto x=1[/tex]

[tex]\large\bf{\orange{ \implies}} \: \tt \: \: 4 \: ( - x \: + \: 4) \: = \: 12[/tex]

[tex]\large\bf{\orange{ \implies}} \: \tt \: \: - 4x \: + \: 16 \: = \: 12[/tex]

[tex]\large\bf{\orange{ \implies}} \: \tt \: \: - 4x \: = \: 12 \: - 16[/tex]

[tex]\large\bf{\orange{ \implies}} \: \tt \: \: - 4x \: = \: - 4[/tex]

[tex]\large\bf{\orange{ \implies}} \: \tt \: \:x \: = \: \frac{ \cancel{- 4} \: \: ^{1} }{ \cancel{- 4}} [/tex]

[tex]\large\bf{\orange{ \implies}} \: \bf \: \:x \: = \: 1[/tex]

[tex]\Large\underbrace{\textrm{{{\color{blue}{Hence , Proved}}}}}[/tex]

where is kalsubai peak????????​

Answers

Answer:

Kalsubai peak is situated in Maharashtra, India (south Asia) in Western Ghats.

→ You can see on the map that Kalsubai peak is marked with a red point.

describe the following tyre parts stating their advantages and disadvantages. i.groove ii.cuff iii.lugs​

Answers

1. Groove describes the gap in the outer crust of rubber in a tire.

Advantage: It helps water and air to be expelled from beneath the tire.

Disadvantage: Regrooving is dangerous as it makes more grooves to worn out tires which may dysfunction during driving.

2. Cuff is tire scalloping in which treads move from high to low.

Advantage : It reduces fuel consumption due to less friction and resistance.

Disadvantage: There can be lack of contact of tire with the rod surface and therefore bouncy feel can be irritating for the travelers.

3. lugs: Lug nuts are fasteners which attach a tire from the automobile.

Advantages: Lug nut patterns helps maintain good braking power.

Disadvantages: There can be tendency of high noise when car is driven at high speed.

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Which line segment has the same measure as ST?

RX
TX
SR
XS

Answers

Answer:

SR

Explanation:

Line Segments RX and TC have the same measurement, and has a right angle at point X, this proves that SR is equal to the measurement of ST.

Who did Hannibal’s troops fight in the Alps?

Answers

Answer:

I think the answer is

 the Romans

Answer:

For over 2,000 years, historians have argued over the route used by the Carthaginian general Hannibal to guide his army — 30,000 soldiers, 37 elephants and 15,000 horses — over the Alps and into Italy in just 16 days, conducting a military ambush against the Romans that was unprecedented in the history of warfare

Explanation:

pls mark brainliest

What rock type is best described as a felsic volcanic rock that is lightweight, light-colored and appears to consist of hard, solid white-gray material with some embedded angular, broken larger grains of crystalline minerals like quartz or feldspar

Answers

Answer:

Rock Key i think

Explanation:

The felsic volcanic rocks are igneous rocks and are rich in feldspar and quartz. They are rich in iron and magnesium, Have silicate mineral-like magma and rocks.

The Felsic combines feldspar and silica. Most of the volcanic rocks are extensively formed such as Rhyolite and is glassy and light grey rock. Rhyolite magmas form highly viscous lava. Rhyolite can be commonly found along the convergent plate boundary. Predominantly Quartz, sanidine.

Learn more about the rock type is best described as a felsic volcanic rock that is lightweight.

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Name two forms of energy usually used at homes

Answers

Explanation:

Energy exists in many different forms Which each form can be converted or changed into the other forms. Although there are many specific types of energy, the two major forms are Kinetic Energy and Potential Energy.

1. Electrical Energy

→ Example : Lighting

2. Thermal Energy

→ Example : When you cooking

Hope it helps!

The length of a part on model helicopter is 8.5cm;the scale of model is 1:100,000.calculate the real length of the helicopter part in meter

Answers

9514 1404 393

Answer:

  8500 m

Explanation:

At a scale of 1 : 100,000, the real part will be 100,000 × 8.5 cm = 8500 m.

_____

Additional comment

I've not seen or heard of any helicopter that has any parts that are as long as 8.5 kilometers (5.28 miles).

Considering what you have learned about the coriolis effect, briefly describe the coriolis effect on the atmosphere of the planet venus, which is about the same size as earth but has a period of rotation of 244 earth days

Answers

Answer:

In simple words, The Coriolis Force on Venus is exceedingly mild due to all the planet's sluggish rotation. The Coriolis Influence on the movement of the Earth 's atmospheric is extremely significant, generating continent-sized swirling of cloud formations that are readily visible from space when the Earth rotates on its axis roughly once every 24 hours.

silicon and _______ stay in the the outer cells pls tell me fast​

Answers

Answer:

Oxygen

Explanation:

The earth has been divided into three major categories crust, mantle, and core which are further segregated into sub-parts. Since the crust is the outermost layer of the shell, the outer crust of the earth consists of a combination of silicon and oxygen in the majority followed by some percentage of other metals as well. The percentage of Oxygen includes nearly 50% i.e. 46.6% followed by 27.7% of Silicon and the other 25.3 % includes aluminum, iron, sodium, magnesium, etc. Thus, 'oxygen' is the correct answer.

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