Judging from the mine schematic diagram, Yantugou Bauxite Mine is a large mine with a designed production scale of 1 million tons/year.

The mine is even more wide, with an area of ​​20 square kilometers.

No wonder the initial investment was so huge, with hundreds of millions of dollars.

Xu Xin started the system and set up a single Al2O3 content. According to the data, in addition to bauxite, there are also clay ore and iron ore in the mining area here, but there is no surplus of energy at hand, so only a unique measurement can be made.

The depth is directly adjusted to 400 meters, and the ultimate depth that can be analyzed by the formation analysis horizon.

The eyes looked at the ground, and the line of sight was like a laser, penetrated layers, thin or thick strata, reaching 400 meters deep underground.

The fourth system of floating soil...

Mudstone...

Dolomites...

Judging from the lithologic results of the formation, his current location is the underlying formation of the ore layer. The ore layer above has been weathered.

Continue to walk forward, about two hundred meters away from the command center, the strata suddenly changed drastically.

The automatically generated sectional view in the horizon is no longer a picture with obvious lines parallel to the strata, but an arc curve suddenly appears.

It seems very strange in the strata, as if a huge tunnel appeared underground.

In the middle of the "tunnel", the pattern representing lithologic is very complex. In some places are densely packed with small black dots, which represent fine sandstone.

In the middle of the small black dots, sometimes you see sharp triangles and sometimes you see small round circles.

Such lithologies are very rare in mineral geological exploration.

On the contrary, it is widely used in engineering geology.

“Sandstone?”

"cobblestone?"

“There is a layer of alluvial soil on it?”

"Is this a rock formation formed by the impact of the riverbed?"

One difficult problem lingers in Xu Xin's mind.

It seems that this was once a big river, but for some reason, the river channel was buried by various soil and stones, and there was no sign of its past traces.

And in this place, because the soil and stones are soft and suitable for vegetation, they are surrounded by dense pine forests.

He was really a little confused. His real geological knowledge reserves were not as good as those of the most experienced geologist.

"How did the lithology of the strata near this area be described in the past?" He asked the two geological technicians beside him.

The two technicians who accompanied him were young and took out the report they carried with him and a section field recorder. They looked through it for a long time.

One of them stumbled: "This is the weathering zone of ore-bearing shale, and there are some upper strata, that is, the weathering of the limestone on the top."

"According to the information and your understanding, is it still a normal strata?" Xu Xin really couldn't hold it in and showed a sarcastic smile.

"Yes, but the weathering is quite serious." One of the technicians nodded firmly, not ignoring the change in Xu Xin's expression.

Another technician pointed ahead and tried to prove his words, "We can see the ore exposure point after walking less than a hundred meters."

Xu Xin came to check the ore situation, and did not care about the sudden changes in the rock formations here.

Several people walked about a hundred meters forward and built the field road to the slope where the gray-white bauxite was exposed. Due to the weathering effect, the texture was very loose.

According to data, the ore-bearing rock system is the Liangshan Formation of the Permian system, with a layer of shale below, and a stable magnetite layer below the shale, and thin coal seams can be seen in some parts.

This statement is completely verified from this dew point.

A single point doesn't mean anything.

Xu Xin took a look and continued to walk forward.

The line of sight penetrated the ground and saw that the ore layer was inserted into the ground with a gentle slope at an inclination of about 7 degrees.

In the horizon, mineral layers began to appear.

Al2O3 grade: 60%

Thickness: 3.1m

After walking less than two hundred meters ahead, the ore body changed tremendously:

Al2O3 grade: 75%

Thickness: 37.9m

After walking another three hundred meters, the situation of the mine took a sharp turn:

Al2O3 grade: 46%

Thickness: 1.1m

After walking fifty meters, the ore body almost disappeared:

Al2O3 grade: 15%

Thickness: 0.3m

The ore layer grows from thin to thicker, and becomes thinner again until it disappears.

Within the next five hundred meters, there was no bauxite enrichment again.

What does this mean?

This is not a sedimentary deposit at all, but a lens-like ore body!

Xu Xin asked uncertainly: "What is the type of deposit of Yantugou large bauxite?"

"As a sedimentary deposit, the roof is limestone, the base is shale, sandy mudstone, and the formation is very stable." A technician replied naturally.

The understanding of sedimentary deposits has been firmly supporting the argumentation of large deposits since the exploration was completed more than ten years ago.

However, in Xu Xin's eyes, the truth of telling lies with his eyes open was completely revealed under his nose.

At that time, why did the expert group fail to pass the inspection project?

Experts are not blind, they have already seen the problem?

However, the gap between sedimentary deposits and lenticular deposits is so obvious, how did they confuse the public and finally pass the acceptance?

Where are the specific tricks?

"Look at it. How many drill holes have we drilled in total?" Xu Xin asked.

"The four drill holes have a smaller spacing between the drill holes in the middle, so the spacing between them is relatively large."

"I only saw three drilling holes on the project layout plan. Where did I miss one?"

"It's not a missed one. Three of the drills were drilled twelve years ago, and the other one was the drills we arranged last year to verify the accuracy of the data of the mines we saw before."

"The drilling holes you made are not counting!"

Xu Xin snorted, spread the project layout on the road, and gestured the distance between the drilling holes with his fingers.

"The spacing between two drill holes at both ends of our location has reached 700 meters! This is not in accordance with the rules. If the deposit is so good, and it is a detailed survey. The best solution is that the drilling distance is two or three hundred meters long, and it is no problem to drill a hole between the grid spacing of 100 meters!"

"Well... this is the drilling hole arranged more than ten years ago. Perhaps the exploration cost is not high, and the drilling is not that tight."

"The bullshit investigation cost is not high!" Xu Xin couldn't help but curse.

He didn't want to scold these people around him.

He, an entry-level geology employee, has seen that it seriously does not meet the specifications!

The speaker is unintentional, and the listener is intentional.

The two geological technicians looked at each other and were both young and energetic, and suddenly became angry.

You look younger than us, what kind of garlic is stored here?

Xu Xin did not pay attention to the changes in the emotions of the people around him. Looking at the arrangement rules of the drilling holes in the engineering layout drawing, he decided to move forward in a straight line along the exploration line of the drilling holes.

In this way, they had to abandon the flat cement roads, had to walk the country paths, and even cross the woods and thorns.

Because of resentment towards Xu Xin, the two technicians did not lead the way.

Xu Xin walked in front, with branches on his face and hands scratching many wounds.

After walking about three hundred meters, he suddenly stopped because he had a new discovery.

On the overgrown ground, the soil buried cylindrical stones.

These stones are not ordinary stones, with smooth cylinder surfaces. They are obviously cores drilled out of the ground by the drilling rig!

These discarded cores were originally buried in soil.

However, the burial depth was not deep, and after the rain washed away, some cores appeared from the ground.
Chapter completed!