Three minutes to talk about popular science
Hearing these two words, we will immediately have such a picture in our minds: a group of people salvage the silt in the stream, and then use the pan to wash the silt, the purpose is to find gold sand.
So why do gold diggers go to streams in search of gold? This brings us to the exploration of gold deposits. Gold is a rare metallic substance, which can only be produced in the process of supernova explosions and neutron star collisions, because of its high density, so the vast majority of gold on the earth is deposited in the earth's core, and the gold ore remaining in the earth's crust is very rare, and it is precisely because of its rarity, so it has extraordinary value.
Since there is a finite amount of gold ore in the earth's crust, how can we spot them?
In fact, there are still some rules to follow in the excavation of gold ore, there is a saying called "no silicon, no gold", which means that the emergence of gold ore is closely related to silicification, because gold has obvious siliophilia. Therefore, in order to find gold deposits, it is necessary to target geological structures such as silicification belts, quartz veins and quaternite quartzite, of course, not every siliceous belt can find gold deposits, but every siliceous belt does have some gold elements to a greater or lesser extent.
* Silicon-friendly, but especially fond of quartz stone, and these gold hidden in quartz stone will fall off in the process of long-term rain erosion and weathering.
The gold that falls off will flow down the water, and when it comes to a place where the terrain is gentle and the water is not strong, they will be deposited in the silt, and over time they accumulate more and more, and when someone finds that there is a large amount of gold sand in the silt of a certain stream, a gold panning point is born, which is why the gold sand can be mined in the stream. However, it is too slow to dig for gold sand in the stream little by little, far less pleasant than picking up gold ore, and if you want to pick up gold ore, you must know how to find gold mines, and you must know how to identify gold mines.
In China, most of the major gold mines are distributed in the northeast, southwest, Xinjiang, Inner Mongolia, Henan and Shandong ore belts.
Where there is gold ore, there are obvious characteristics in the topography, first of all, the terrain is flat, followed by more stones, and finally there is a fine soil with a black luster, which is mainly because the probability of gold deposits in the veins of the fault zone structure is relatively large. Of course, this does not mean that there are always gold mines in places with these characteristics, but the probability of gold mines is higher than in other places, and if gold mines can be found so easily, gold will not be so valuable. But people always have to have dreams, what if they come true? Therefore, we should still learn to identify gold ore, after all, opportunities are always reserved for those who are prepared.
Rough gold ore is essentially a mineral with high gold content, due to the different gold content and other types of materials, the rough gold ore does not have a uniform color in appearance.
Some rough gold may have a faint golden color, while others may be silvery, and some are even black, so it is not enough to observe with the naked eye, and you should use a magnifying glass. Under a magnifying glass, no matter what color the rough gold ore is, there will be more or less golden yellow shimmers, but it does not mean that all the gold ore with the glitter effect is gold, and if these flashes are grainy, then it will be more believable.
After the observation, it is time to test, and the easiest way to test the authenticity of gold ore is to use a hardness test needle.
Due to the soft physical properties of **, scratching on the surface of the hardness test needle can cause shallow scratches, and this kind of test requires a certain amount of experience, and too deep or too shallow scratches are not right. If we are inexperienced, we can also use ultraviolet lamps to irradiate the rough gold ore, under the irradiation, the real rough gold ore will show yellow or green light, and there will be some fluorescent effects, which can be said to be a unique feature of the rough gold ore. Of course, if you really pick up gold ore, don't monopolize it, and hand it over in accordance with the law is the right thing to do.