The first thing to understand is definitely the type of rock.

As Zhao Guangming said, volcanic rocks, sedimentary rocks, minerals, what is the relationship between these?

Fortunately, these are all basic geology, and it is easy to find some answers.

First of all, the earth has a circle structure, the core is magma, the mantle, the crust, all of which are different degrees of soil and rocks.

It can be said to be the most basic material of the earth, and it is also the mother body of the earth.

And how are rocks formed?

Deposited from soil.

Dirt comes from the other most basic substance in the universe, dust, which has been naturally deposited and compressed over millions of years, and it has taken thousands of years for any inconspicuous small stone to form.

The formation of a piece of granite takes hundreds, tens of millions of years, while the formation of a piece of jade takes hundreds of millions of years.

It's a complex natural process.

The organic matter mixed in the soil, in the precipitation of time, coupled with high temperature, cooling, thermal expansion and contraction, will have a process of aggregation and cementation.

Like sedimentary rocks, which are the most basic type of rock in the earth's crust, they are natural accumulations and deposits of aeolian sand, and their main components are calcium carbonate, carbonates, and metals with little or no metal content.

Because its main formation method is sedimentation and stacking, this kind of rock has an obvious layered structure, also called shale.

The softness of the texture, and the degree of hardness, simply look at the time, the deposition time is long, the structure is tight, and the texture is harder.

The deposition time is short, it is the kind of sand and stone, or simply the soil.

And the structure of the mountain, the rocks inside, the soil outside, that's pretty much it.

And what about land?

Soil on the surface, rocks below.

Further down are the more ancient sedimentary rock formations, and further down are volcanic rocks, magmatic rocks, and rock formations rich in metal minerals.

Therefore, mining generally has to dig down.

And the mines in the mountains have to be dug into them, or down.

Of course, due to the movement of the earth's crust, the extrusion of plates, the distribution of volcanic rocks and sedimentary rocks, which are not fixed, are everywhere, and those that were originally underground will also be squeezed out of the ground due to orogeny, earthquakes, and so on.

Therefore, the ore veins are divided into underground ore veins and open pit ore veins.

Open-pit ore veins, generally referring to mines in the mountains, can be mined directly by digging the soil on the surface, which is very rare.

Understanding these two points, the concept of mining is very clear, the outside is all sedimentary rocks, and if you want to mine, you have to dig up these sedimentary rocks.

It must be very difficult for ordinary manpower to mine this kind of mine.

But nature, with its own set of cycles, is like a river, which is the most primitive porter of nature.

The flow of water, hundreds or tens of millions of years, each river channel, often reaching a depth of tens of meters, washes these shales into sediment, and the veins are also washed out.

So the pebbles by the river can also pick up ores, even jade, granite, and many types.

Like Hetian jade, most of the folk seeds are washed out by the river, and the newly reined jade pickers are all picked up on the river beach, and dug on the riverbed in the low tide season.

Sha Jin, too.

The sediment washed by the river is rich in various metal substances, and the gold panning is also gold, silver, copper, iron, lead, mercury and so on.

It's just that the density of gold is the largest, 15 times the specific gravity of water, several times that of iron and silver, copper and other metals, and other metals have been washed away, encountering sedimentary terrain conditions, like the Gulf Stream of the river, as long as there is a certain arc, it can form a natural beach, and the golden sand can be deposited.

There must be gold.

It's just that more or less, it depends on whether there are veins in the riverbed upstream.

But it caused another problem, Fan Yang patted his head, and had a bad premonition.

"Finish, brother, you are wrong, gold veins, anywhere on the surface, can exist, he is not like our assumptions, think that the river originates from Zakin Mountain, and the ore veins are on Zakin Mountain. This is not comprehensive. In fact, the gold vein, it may exist in any section of the river, it is not possible to step on the foot at the moment, it is a vein, maybe, and if you go inside, it will be gone, this is very likely, how can this be said accurately?"

", I told you there must be a vein of gold in Zakin Mountain. Zhao Guangming stiffened his neck and said.

Fan Yang's gaze was solemn and he shook his head secretly.

Zhao Guangming is really just illiterate, he can't understand such a simple truth, if he really takes Zakin Mountain as the source of the entire river, unless......

It's really a mountain of gold.

Thinking of this, Fan Yang's scalp was tingling, and his breathing was stagnant.

After the founding of the People's Republic of China, several large-scale gold mines were explored in Tibetan areas, which were not announced, secret, and more, all hidden in the deep mountains and old mountains.

It is now 92 years, the eyes of various countries are gathered here, the international is even more eye-catching, what international joint scientific expedition teams are everywhere, the Qinghai-Tibet Plateau in China, there are 1.2 million square kilometers, including Xinyan, Qinghai, Xizang, three provinces, municipalities and autonomous regions, as well as hundreds of thousands of square kilometers of westerly wind belt, permafrost, no man's land, in the past, there are Nepal, India, 100,000 mountains are few, millions of mountains are not exaggerated.

The wealth contained in it is incalculable.

Manpower exploration, after all, is limited, and it is now 92 years, is it ......

As soon as he thought of this, Fan Yang's mind was in a trance, and he heard a voice missing a door in his ear, shouting, "Wow, yes, I found gold." ”

Fan Yang turned his head to look, only to see the missing door lying on the ground, in front of him was a pile of sand that he picked up and spread out finely, he pointed his fingers, pinched something, leaned in the sun, squinted his eyes and watched.

"What?" Zhao Guangming hurriedly ran over.

Fan Yang also ran over.

At first glance, there was a little bit on the finger of the missing door, about the size of a grain of rice, but it was only a thin layer, so large yellow and clear gold flakes.

Zhao Guangming dipped his finger in saliva and dipped it from the finger that was missing a door.

"It's a piece of gold. ”

Just now, Zhao Guangming had made some discoveries, so Fan Yang didn't make a noise, he was carefully distinguishing, and found that the river sand here, in addition to the river sand, also has red sand, this kind of red sand is finer and denser.

Casting, turning sand, making jewelry, rings, turning over pig iron ingots, casting a tin pot, and using sand molds, are all this kind of sand.

The first water panning for gold is to filter out the yellow sand, retain the red sand, and then exhaust the red sand, and the black sand obtained is the original sand.

In the original sand, 90% of the sand needs to be refined, and only 10%, or below, is the yellow and clear golden sand.

And the lack of a door here grabbed a few handfuls of sand, and actually found a small piece of gold, what is this concept?

It was only two or three kilometers deep into the river valley, and after walking for an hour or two, there was such a harvest.

"Quick, quick, take out the sapper shovel, what are you doing in a daze, digging down. ”