DSE GEOG Concept 地理概念 001: 岩板拉力與海脊推力（Slab pull & Ridge push）

Hello, everyone, welcome to the first video of D SE Concept E arning,

and today this video will talk about M 1, this R isk and Opportun ities, the opportunities and risks, including S nap Pool and R isk P ulse, this is about plate tectonics and push.

Before we dive into today's two main topics, I want to talk to you about M ental Con version, the concept of slow convection.

Actually, the plate and push are related to this S nap - P ull and R idge - P ull, which is closely related to the slow convection M ental Con version.

So what exactly is slow convection? In fact, slow convection M ental Con version refers to the mechanism of heat transfer from the Earth's interior to the surface.

And because this heat is transferred from the Earth's interior to the surface,

it will form different densities in the lithosphere, N ith os phere.

And what forces cause the plate movement that many students talk about?

It is because of gravity, G raph ity, we will talk more about this part when we enter the topic.

Here is a diagram, this diagram is meant for you to simply understand the concept of slow convection.

You will see here is a convection cell, we call it Con version Cell.

What is the function of this convection cell? It brings heat from the Earth's interior to the surface.

This forms the mechanism of floor convection we just mentioned.

Alright, officially moving on to today's topic, which is this W itch Push and S nap Pull. First, let's talk about this W itch Push, which is the push.

Because we all know that the temperature deep in the Earth

will get hotter, so in the mantle rocks, which are the rocks in the lower Mental, will be heated by the Earth's core.

And when the mantle rocks are heated, they will expand.

And as they expand, their density decreases, leading to less increase.

And because their expansion and the decrease in density will cause the mantle column to move upward.

When the mantle column pushes up to the colored circle,

it will make the oceanic geology, which is the O cean ic Lith osphere, thinner.

This thinning causes the melting point of the rocks to decrease.

This melting point, due to these factors, will lead to the emergence of M eg mar and magma.

And because magma and M eg mar are both very hot, they will rise.

So it will fill some cracks, which are called F ish ers.

When filling the cracks, new crust will form.

These heated and lower density crusts will rise and surpass.

Will rise and surpass

The original crust, like a small mountain, will arch up, forming an expanding seat, which is an upwelling ridge

When this rock cools and solidifies, it will form new oceanic geology, it will form new oceanic geology,

And this newly formed oceanic geology will also be affected by external factors causing it to cool and contract, which is cruise and contrast

Because it cools and contracts, it will increase its density, that is, density increases

Moreover, because there is gravity here, it will cause

The newly formed oceanic crust will slide down from both sides of the ridge, as if it is sliding down while speaking

Because the lines on both sides will cause tension to appear

And the English term for tension is Tensional Force, because there is tension here, it will cause these two plates to separate

And the boundary of the separating plates, we have learned, is called a constructive plate boundary, Constructive Page Boundary

And this is a detailed explanation of V is put s

Alright, now we enter the last part of today's main topic, which is this spotted milk

Just mentioned earlier, the Reach Pulse mentioned that the opening plates will continuously separate

When separating, they will merge with other rocks in the asthenosphere, that is, the A sp inos phere merges