Since Zhao Guangming would shoot, he took the gun to him.

Fan Yang asked as he walked, "Didn't you see it, brother, are you going to shoot?"

"I have participated in militia training before, otherwise you see me set up tents, I will have a lot, when your master is more than enough, you two boys, when to set up wine, I will accept you two as closed disciples. ”

"Pull it down, follow you, I can only take us to the river, you will fall into the water every way you walk, you haven't said the life-saving grace of the two of us." ”

Lacking a door, he took Zhao Guangming into the river and opened the shabu.

"I was careless, heh, you don't know what I'm capable of. ”

"I don't care what you are capable of, it's impossible to call the master, it's almost the same to call the eldest brother. Missing a door laughed.

"Give Lao Tzu ......" Zhao Guangming made a gesture to fight.

The three of them talked and laughed, and now the distance is getting closer and closer, and they are getting along more and more harmoniously.

Along the river valley, the river is washed all year round, the water level rises and falls, and the tidal flats on both sides are some wide and some narrow.

In the narrow place, the three of them went uphill, followed the forest, took a stick to open the way, and stepped on the bushes.

The wide tidal flats went down to the river and walked on the pebbles and the big rocks.

Every time Zhao Guangming walked, especially on the wider tidal flats on both sides, he would pick up stones, grab sand, and come to his eyes to watch carefully.

It's the same as the last time the two of them saw Zhao Guangming fall into the water.

This is Zhao Guangming's habitual action.

Ask him, and he won't say.

"I said, brother, now you can always tell us, what are you doing with these stones and sand?" asked Fan Yang.

"Don't make noise. Zhao Guangming grabbed a handful of sand and flicked it around in the palm of his hand, as if he was looking for something, as if he was distinguishing something.

"I'll take a look, too. ”

He grabbed a handful of sand and flicked it in his hand, and followed Zhao Guangming's example, put the sand under his nose, and looked at the sun over and over again.

Zhao Guangming looked at it and asked rhetorically, "What are you looking at?"

"Let's see if there's any gold. ”

", you can see gold when you pick up a handful of sand, do you think it's a gold mine?"

Fan Yang took the opportunity to ask, "Then what are you looking at?"

Zhao Guangming stared at the two of them, and said angrily: "Tell you to set the wine, if you don't put it, you want to learn my craft and dream." ”

He bowed his head again and went to pluck his sand.

After a while, he still relented, and said as if the old god was there: "Do you think sand is sand? There are many doorways in here, what kind of sand is this?" Do you know?"

Fan Yang looked carefully, the particles of this handful of sand were coarse, and the surface was obviously yellow, which was very ordinary.

said: "It's just ordinary yellow sand, right?"

"I still know that it's yellow sand, so do you know where the yellow sand came from?" Zhao Guangming said.

Fan Yang shook his head: "I don't know." ”

"There are also types of stones, granite, basalt, limestone, sedimentary rock, volcanic rock, magmatic rock, how much do you know?"

Fan Yang and Missing immediately pricked up their ears.

Zhao Guangming threw away the sand, clapped his hands, chose on the river beach, and picked up a pebble that was a little milky white with yellow stripes.

"What is this?"

Fan Yang took it and looked at it carefully, the surface of this pebble was very smooth, the white place was already a little jade, it was already a little warm, and the texture was hard.

"Granite, huh?" Fan Yang replied tentatively.

Zhao Guangming was noncommittal, picked up a pebble with a pitted surface from the ground, handed it to Fan Yang, and asked, "What about this?"

It is also a pebble, the texture is very hard, but this pebble has been washed by the river for thousands of years, although the appearance is still round, but the surface is still rough, and there is only one color, that is, gray and fluttering yellow.

There is also no obvious jade quality on the surface.

Fan Yang shook his head, indicating that he didn't know.

"It's granite too, but it's not too late. ”

He picked up a crimson stone from the ground and handed it to Fan Yang.

"Take a good look at this piece. ”

Fan Yang took it.

It is a crimson stone, hard to the touch, which has been washed by the river for so long, but has not become round, and the surface is also full of potholes, large and small.

It is also very different from the previous stone with a rough surface.

Although the surface of the previous piece is rough, the graininess is still very even.

But this piece is purely full of holes.

Some of the small pits are slightly deeper, as if they have been eaten by insects.

Looking through the pits, I found that the stone inside was very complex, some were charred black, some were dark green, and there were some small bumps of various colors in the pits.

Fan Yang's first reaction was that there was no mine in this stone.

"Could it be that this is ore?"

"That's right, this kind of stone is called volcanic rock, or magmatic rock, it comes out of the ground, and there is iron powder in it. ”

Fan Yang showed a contemplative look.

Zhao Guangming clapped his hands, climbed ashore, and moved a stone down the dirt slope.

It's a very ordinary stone, the kind that can be found all over the hillside.

Lift it up and slam it the ground.

The stone shattered with the sound, breaking into seven or eight pieces, and some of them shattered into powder.

"See, this kind of stone is called sand stone, limestone, this kind of stone is the most, and the yellow sand in the river, most of it is washed out of these sand stones, limestone. ”

Fan Yang suddenly realized: "I understand." ”

Zhao Guangming looked disdainful: "What do you understand?"

"I see. Fan Yang nodded frequently.

In the past few days, he has made up for geography and geology, and although he has seen it in a daze, he has always gained something.

Gold, which has existed on Earth for 4 billion years, 90 percent of which is deep in the Earth's core, is supposed to be mixed with magma.

It is an incomparably long process, from the core of the earth to follow the flow of magma, and the eruption of volcanoes, the movement of the earth's crust, gradually being pushed out of the mantle, to the surface.

The vast majority of metal elements and mineralization are more or less inseparable from the movement of these magmas and natural heat treatment.

The gold content of ordinary surface sedimentary rocks and mineral-rich volcanic rocks is certainly different.

After finding some clues, Fan Yang's eyes suddenly lit up, and the gold mine, which he originally thought was nowhere to be found, began to gradually find some way.

He knew what Zhao Guangming was doing.

He wasn't looking to see if there was gold in the sand.

He's discerning the sand of the river.

So as to determine whether the sand has gold, or how much gold does it contain?

Based on the types and number of pebbles on the riverbed, what kind of rock is composed of the surrounding mountains and riverbeds?

Fan Yang's brain turned fast, Zhao Guangming was only illiterate after all, his knowledge came from experience, exploration, and word of mouth from others, and it was not comprehensive.

As long as you get a glimpse of the tip of the iceberg, rely on your own modern way of learning.

It is likely that he has inferred a more systematic exploration knowledge than Zhao Guangming.

This has been figured out, and another question is again.

How did Zhao Guangming find out the golden pit in the first place?

On what basis did he determine that it was buried five or six meters deep in the ground, rich in a large amount of sand gold?

What's going on with those golden eggs?

Why are several pieces of gold ore forming separately underground?

How is ko's head gold formed?

In a flash of inspiration, all kinds of inspiration came to mind.

Now Fan Yang urgently needs to supplement all kinds of relevant knowledge.

Li Du no longer paid attention to Zhao Guangming, but fortunately he had a few popular science books on geology in his backpack.

Fan Yang hurriedly flipped out.

Sit on the ground with a butt.

It's like reading it hungrily.