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25

Metals occur on every continent . The issue is whether or not they occur in sufficiently large deposits for them to be mined economically. The difference between a mineral deposit and an ore body is economics: can it be mined for a profit? One of the issues with mineral resources is that once they've been mined, they're gone. Cornwall and Devon, in the UK, ...


22

Absolutely not. First of all, "rare earth magnet ore", meaning the ores of metals like neodymium (Nd) and samarium (Sm), is not magnetic at all. It only becomes a magnet once you make a magnet out of it. For example, one such magnet is Nd2Fe14B and it only becomes a magnet after neodymium is combined with iron and boron. Naturally occuring ...


19

That is the multimillion dollar question! "looking for surface formations" is indeed one way, and it was the main method of exploration in the past. This does not necessarily mean that you directly see the ore deposit in front of your eyes. Many ore-forming systems are accompanied by different kinds of alteration (for example potassic or argillic alteration) ...


16

All stable elements (and the radioactive U and Th) exist everywhere on Earth. They're in the sand underneath your feet, they're in your bones, they're in the dust in the air, they're in the ocean. The question is how much. There are some estimates on the concentration of each element, and there's a nice table that lists all of them in Wikipedia article ...


13

In addition to the above, what happens is that people look for commonalities between known deposits. So, for example, if you have a lot of gold veins in one area, and lots in another area, then you look at what is needed for these veins to form. Once you have a reasonable idea of possible ways to form your ore, then you have something that you can look for. ...


11

No. Cosmic radiation are high-energy particles that create particle showers high up in the terrestrial atmosphere. Those particle shower are heavily beamed downwards, and although in principle some secondary shower products feel the local magnetic fields, effectively are not affected by the natural terrestrial field, let alone weaker local fields. Those ...


11

I've been looking for these things over a few decades and along with other geologists doing this we have seen how we find things change somewhat. Many methods used a century ago are still in use, but with the addition of refinements. So looking at how large and small deposits were found will change over time. (Simple example of that would be that Romans and ...


4

Part of the problem is in the question itself. In the title, you ask about "in every continent" while in the text, you imply that you are talking about smaller areas. One premise we can safely assume is that most elements are distributed unevenly. That is a far more relaxed question than you are asking, though. For an example, look at hydrogen. You ...


4

how can a complete novice find ore? You don't. In addition to Fred's excellent answer regarding the legalities of the matter, I would add the following: All of the easy stuff has already been found, and finding any more ore requires efforts beyond what you can do on your own. Stuff that is easy to find now is commonly in old mines or old mine tailings. ...


4

In other words where might be a natural place on Earth that would over power a compass and then some Just about anywhere where the rocks are rich in iron. This would occur near iron ore, basalt, gabbro, and similar iron-rich rocks. You really don't need a lot of magnetite in the rock for this to move the compass needle. You don't even need magnetite - ...


3

The rock you have is most likely not platinum ore. It appears to be sulfide ore most likely composed of galena, pyrite, and maybe copper sulfides such as bornite. It is more likely that your specimen is silver ore rather than platinum ore. Mexico has a long history of silver mining. There is a platinum deposit in southern mexico and it appears to ...


3

Sulfide ore petrography is reflected light is even harder than transmitted light. Unlike transmitted light, colour is actually a very important characteristic feature. But the perception of colour can vary between different light sources, quality and time since polish, microscope lens, and cameras. Therefore, from an image like that it is extremely ...


2

Magnetite is a type of iron ore and does not significantly affect the Earth's magnetic field. It would not protect you from cosmic radiation. However, cosmic radiation is more intense high in the atmosphere, so airline cabin crew and people living on high mountains are slightly more at risk. If you are worried about how to avoid radiation damage, the thing ...


2

The magnetic field stops the charged particles mostly by trapping them along their fields lines (globally parallel to the ground at most latitudes, plunging to the ground near the poles (therefore allowing northern lights). If you 1up nature and build a massive electromagnet, you could at most create a secondary pole, which would act as particle channel to ...


2

Although the other answers have correctly pointed out that this isn't a relevant thing on Earth, it should be mentioned that such an effect does occur on the Moon: it is the likely cause for the Lunar swirls. These are though to be the result of magnetic anomalies causing local shielding of the surface from solar wind. This effect prevents the regions from ...


1

There are active geological processes that lead to separation of mineral constituents. A source material that contains specific primary minerals, with some transport mechanism (eg convection or liquid flows) to physically separate them and 'trapping' conditions that allow them to accumulate are all required. Processes that result in minerals being separated ...


1

This somewhat of a naive question. Firstly what type of ore do you want: iron ore, gold, tin, nickel, copper, silver-lead-zinc, lithium, ... etc. Also, the difference between an ore deposit and a mineral deposit is economics - can profit be made by digging it up, processing it and turning it into a saleable commodity: gold bars, ingot or sheets of copper, ...


1

Cluster in this situation refers to a grouping or a number of mining operations within a giving area. Sometimes deposits of minerals with sand deposits is such that a number of smaller deposits is created instead of one larger more continuous deposit. When this happens it sometimes makes more sense to mine the deposits as separate pits instead of one large ...


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