"Boss, should we go down?
The ground sent us to inquire about our destination. ”Adrian turned around and asked Yang Jing.Although PNG is poor, except for a few big cities with regular airport towers, most of the airports in other places are airstrips, and there is not even a tower, so there is almost no need to report and apply to the local air traffic control department to rent a helicopter to fly in PNG.Porgela is also an airstrip, but it is a gold mine, and Rio Tinto and BHP Billiton, two mining behemoths, are jointly in charge of it, so there is still an air traffic control here.Yang Jing thought about it and turned his head to Guo Xiaoxiang and said, "Why don't you go down and have a look?"
I've never seen how this kind of open-pit mine is mined. ”Guo Xiaoxiang shrugged his shoulders and said indifferently: "Whatever, I can do anything." ”So Yang Jing nodded at Adrian and motioned for them to fly down and dock.Looking down from the air, the whole of Porgela is divided into two parts, one part is a residential area, and the other is a larger area of mines.It is worth mentioning that the altitude of the mining area is more than 2,300 meters, but the depth of the huge main pit is more than 600 meters, that is, because of the pit, the average altitude of the mining area has been lowered a lot.Moreover, to the west of the mining area is a mountain with an altitude of more than 3,000 meters, and the largest pit has been dug down for six or seven hundred meters, making the mining area look extremely steep.To the east of the mining area, on both sides of an improvised road that stretches for several kilometers, there are a large number of houses scattered about, most of which are where the miners live, and in the center of the residential area, a small town.At the beginning, Chris asked to land in the mining area, so that the boss and they could go directly to visit the mining area, but the air traffic control did not agree, and Yang Jing and they could only land on the north side of the small town of Porgela.By this time, the rain in the sky had stopped, and the air was filled with a thick humidity, which was sticky and uncomfortable.But fortunately, the altitude of this place is relatively high, and the sun is not visible in the gloomy sky, so the temperature is still relatively low, unlike the kind of sauna days in most of the areas below.The town was quiet, and a road winding from the east made several turns into the depths of the town.As a mining expert hired by the company, Liu Zhaoming is very familiar with PNG, especially the major mining areas in PNG, which he has inspected."
Yang Dong, Guo Zong, this town and the surrounding houses are a town that has developed based on the Porgela mining area.There are about 20,000 people, most of whom are workers in the mining area and their families.The road was built from Mount Hagen and is PNG's national trunk road. ”"Teacher Liu, why are you so familiar with this place?"
Yang Jing was also quite curious about how this middle-aged man who looked like Sven was so familiar with this place.Liu Zhaoming said: "In fact, the year before last, I came to this mining area for a period of time with a delegation organized by a domestic department, and I lived here for more than 20 days at that time, so I am still familiar with this place.Now, two years on, though, the town doesn't look like much has changed. ”"Yo, Mr.
Liu, have you ever inspected here?"
Yang Jing was quite surprised, "Then Mr.
Liu, do you have any thoughts on this?"
”"Views?
Hehe, what can you think?
”Liu Zhaoming shook his head with a smile as he walked, "If you have an opinion, it can only be said that God favors this country too much."
Just like this gold mine, Mr.
Yang, guess what the average grade of gold ore in this mining area can be?
”Although Yang Jing doesn't know much about professional mining knowledge, he is now the major shareholder of Rongbao Mining after all, so he has also learned a lot of mining knowledge by himself in the past two years, and he still understands some basic terms."
Can it exceed 1 gram ton?"
Yang Jing thought about it, guessed a relatively high number and said.That's a lot for the average grade of a gold mine.Generally speaking, the industrial grade of gold ore is generally 03-05 gram tons, which means that if the gold content in the ore reaches 03-05 gram tons, the ore can be mined and profitable.With the development of metallurgical technology or the increase in the price of mineral products, the minimum industrial grade of ore will be reduced.At present, the average grade of many gold mines in China will only be able to reach the standard of 03 gram tons, while the average grade of some of the world's famous large gold mines is mostly below 1 gram ton.For example, the world's largest copper-gold mine, which is also located on Irian Island and less than 700 kilometers away from the Porgela gold mine, has an average gold ore grade of only 0,703 tonnes.The Olympic Dam uranium-copper-gold mine in Australia, which ranks second in the world in terms of gold reserves, has an average gold ore grade of only 0,328 grams.In addition, the world's third-largest copper-gold mine, the Fiab mine in Alaska, USA, has an average grade of only 035 grams.However, the three world's top three mines are all associated with a variety of metals, and gold ore is only one of them.Even though these large mines have gold reserves of more than 2,500 tons, gold is only one of the outputs of these mines, and these mines also have other associated minerals such as silver, copper, and molybdenum.But even so, the average grade of gold ore in this associated ore is more than 03 gram tonnes, which is definitely very good.So Yang Jing guessed a 1 gram ton, he already thought that the guess was not low, after all, the Porgela gold mine is a silver-gold associated mine, in addition to having more than 400 tons of gold reserves, there are also more than 1,000 tons of silver reserves.Liu Zhaoming shook his head with a smile and said, "Yang Dong, your guess is a bit low. ”"Huh?
Is this still low?
”Yang Jing was a little incredulous."
That's right, that's a bit low.I've got a set of numbers here, you listen.The Porgela gold mine was completed and put into operation in 1990 and has been in production for 28 years now.From the start of production in 1990 to 2015, the mine produced a total of 19.36 million ounces of gold, or about 602 tonnes of gold.Now the gold mine still has 400 tons of gold reserves, which is the remaining gold reserves of this gold mine.The mine has been in production for 28 years and has an average grade of up to 44 gram tonnes of gold ore across the mine. ”This figure made Yang Jing and Guo Xiaoxiang gasp, and Guo Xiaoxiang asked in disbelief: "Mr.
Liu, does this gold mine really have such a high average grade?"
”Liu Zhaoming nodded, and pushed the glasses on the bridge of his nose, "When I came to inspect the year before last, I was shocked to learn that the highest gold ore grade in this gold mine exceeded 726 grams.But I have to admit that both the Porgela gold mine and the Glasberg copper-gold mine to the west of this gold mine are the great wealth that God has given to this island. ”After a pause, Liu Zhaoming continued: "In fact, the average grade of gold ore in the two largest gold mines in PNG is very high, even the Lihil Island copper-gold mine on Lihil Island has an average gold ore grade of 2,732 grams.In other words, if we can find another gold mine or an associated mine such as a copper-gold mine, the gold ore grade will certainly not be much lower. ”Liu Zhaoming's words reminded Yang Jing of the fleeting blue-green light he saw from that mountain range when he was about to arrive in Porgela just now.Although he only glanced at it, and did not look closely, it seemed that the blue-green glow that appeared in the mountain range was no worse than the blue-green revealed by the Porgela gold mines.Could it be that there is a gold mine in that area that is similar to the one in Porgela?
Thinking of this, Yang Jing asked Liu Zhaoming: "Mr.
Liu, then you say, if you can find another gold mine in the Mahler Mountains, will the grade be also very high?"
”Liu Zhaoming sighed for a moment and said: "I don't dare to be very sure of this, but according to the reason for the formation of the Porgela gold mine, I am seven points sure that if another gold mine can really be found in the Mahler Mountains, its grade should be similar to that of the Porgela gold mine." ”Liu Zhaoming pushed his glasses, pointed to the surrounding mountains and said, "The Bolgera gold mine is located in the Orogenic Belt of New Guinea.The orogenic belt is located on the northeastern margin of the Australian Plate and is the boundary between the Indo-Australian Plate and the Pacific Plate and a series of other smaller plates such as the Caroline Plate and the Philippine Plate.The orogenic belt began to form after the Triassic-Jurassic, and underwent a series of arc-land collision processes in the Mesozoic, forming the current shape of the orogenic belt.In other words, Polgera is a typical epithermal-type deposit.And in this area, once the gold ore can be discovered again, then it is almost the same low-temperature hydrothermal deposit as the Polgera gold mine" Liu Zhaoming said a lot of professional terms, although Yang Jing didn't understand much, but looking at Liu Zhaoming's confident expression, Yang Jing knew that what he said was not false.This Liu Zhaoming is a real mining expert that Guo Dabao invited from Huaxia University of Mining and Technology with great effort, and since he dares to say so, he is sure enough to prove that what he said is not groundless.In that case, when you're done visiting this gold mine, you'll go back to the area you just found that glows turquoise!
If a gold mine of the same level as the Bolgera Gold Mine is discovered, then Rongbao Mining can enter another precious metal deposit with huge profits!
PS: Bow and thank "Earthquake World" for the 500 tip.