He Xi was not too troublesome, and patiently explained: "Then I'll simply sort it out for you."

Diamond mineralization conditions are very harsh, with strict requirements for heat, pressure, carbon dioxide content, oxygen content and other factors.

Carbon material, under the right conditions, crystallizes to form diamond.

Generally speaking, diamonds are almost always formed in the mantle lithosphere, about 150 kilometers underground. ”

"Hmm." Xu Xin nodded, he understood this.

"That's why there are magmatic rocks in many places, but you can't find diamonds in them, because there are no conditions for diamonds to form underground."

"The presence of diamonds here proves that there are metallogenic conditions for producing diamonds underground." Xu Xin understood.

"Yes, this land, in technical terms, has a craton property, which is a hotbed of diamond mineralization."

"Since it is a hotbed, why can't this diamond primary mine under our feet reach the level of industrial mining?"

When Xu Xin asks this question, he actually involves a deeper theory.

The most superficial reason for the poor condition of this diamond deposit at the foot is that the diamond particles are too finely broken.

He already knew that.

But it doesn't stop there.

The topic is back to the diamond primary ore in front of us.

He Xi looked at the soil on the soles of his feet, and lightly scratched a trace on his toes, "The rock formation we are stepping on under our feet is actually a diamond ore-bearing layer, that is, mica kimberlite. It's just that it is exposed to the surface of the earth, and it has been severely weathered for many years, and the rocks flow far away with the wind and rain.

Maybe countless years ago, maybe tens of millions of years ago, maybe millions of years ago, where we stood was a large diamond deposit. ”

"Yes." Xu Xin thought so.

It can only be said that humans are late.

This diamond deposit has grown old with the years, and the most beautiful face is no longer there.

"The question you just asked is actually very complicated, and it is related to the oldest geological epochs hundreds of millions of years ago, or even 2.5 billion years ago.

Why is the rock here, originally defined as potash-magnesia, and later as mica kimberlite, distinguished from kimberlite?

Because this involves complex geological activity, I can't explain it to you on this mountain, so I'll talk to you about it in detail when I have time.

Countless scholars have done a lot of work in this area of theoretical research. ”

He Xi is well aware of the large amount of theoretical research involved, and even many things have not yet been explored.

However, he explained simply: "After the crystallization of diamond in the mantle lithosphere, magma convection, invades the earth's crust, and melts the surrounding rocks wherever it passes.

Most rocks can't withstand the heat and melt into part of the magma.

Some melt-resistant rocks, such as peridotite, dihui olive, and peridotite, are wrapped in diamond, and after entering the magma, they retain their body and rush to the surface with the magma.

The magma cools and forms magmatic rocks, some of which are magmatic veins and some of which are magmatic cylinders.

Kimberlite and potash porphyry are famous magmatic rocks, or igneous rocks.

The reason for its fame is that only in these two rocks are precious diamonds, and even diamonds!

The diamonds are embedded in the middle of these rocks, wrapped in the captive body. ”

I said a lot of awkward names, and it sounded very loud.

Xu Xin pretended to understand, nodded very seriously, and then asked, "What does this have to do with the diamond primary ore discovered?" ”

"In the process of magma transportation, diamond will actually be affected by high temperatures, and even burned by magma. In the aqueous province, the diamond particles produced from several diamond placer mines can be seen with spots of high temperature melting on the surface of the diamond.

I think that's probably the reason why the diamonds produced by this diamond deposit under our feet are generally very small. ”

"Oh-" Xu Xin seemed to understand.

He Xi looked at most of the people around him with an ignorant look, disagreed, and still smiled kindly: "Theoretical research is not the focus of our geologists' work, it is the research topic of those doctoral and master's degrees.

Of course, understanding the theory of metallogenic is also helpful for our prospecting work. ”

"Why don't we go down and talk as we go?" Song Lejia knows the focus of their work today.

Coming here is just for Xu Xin to take a look and increase his understanding of diamonds.

Soon reach the bottom of the gentle slope.

He Penghui had already commanded several technicians to spread a few drawings on the relatively flat grass.

"Come on, let's look at the drawings, and let me introduce you to our prospecting ideas."

Song Lejia led Xu Xin to the front of the drawings.

Along with Xu Xin, there is also a huge camera.

Along the way, the camera almost always gave Xu Xin a close-up.

"Donkey Ping Village is in this place."

Song Lejia looked at a geological map and found exactly where they were, "Look at these two blue lines, which represent two rivers.

More than ten kilometers north of our location is the Liuyang River.

You see, less than 20 kilometers away from us is the Yuanjiang River, which runs through Heijin Province and Shuixiang Province.

These two rivers, flowing from west to east, are almost parallel and do not meet. ”

"Hmm." Xu Xin listened carefully, but didn't know what he wanted to express.

Song Lejia continued to speak: "In our current place, the No. 1 diamond deposit in Donkey Ping, the diamond particles found have been determined to be diamond type 2 after spectral analysis. ”

After speaking, his finger moved north, pointed to the Liuyang River and said: "Here, the diamond particles found at the bottom of the river are all diamond type 1 after analysis. ”

He moved his finger down again, pointed to the Yuan Jiang and said: "In the lower reaches of the Yuan River, the four recoverable diamond placers found in the Water Aspect Province have mined diamonds, including diamond type 1 and type 2. ”

"Well, what does that mean?" Xu Xin asked.

It shows that the diamonds found in these two rivers are not necessarily from Donkey Ping No. 1.

In other words, there is a great possibility that there are other diamond primary deposits in the upper reaches of the Liuyang River and the Yuanjiang River! Song Lejia finished speaking in one breath, panting slightly.

"What are diamond types 1 and 2?" Xu Xin was stumped by the basic knowledge again.

"According to the classification of diamonds containing impurities, diamond type 1 is containing nitrogen, and diamond type 2 is not containing nitrogen or very little.

It is difficult for us to distinguish with the naked eye and needs to be analyzed by spectroscopy. Song Lejia explained.

"The purpose of our prospecting for this project is to find gem-quality diamonds, whether it is diamond type 1 or type 2, as long as the particles are large, the quality is high, and it has high economic value, which is our goal!" He Xi said this to Xu Xin before.

No matter what industry it is, it is not enough to only talk about feelings, and you have to have interests to attract people.