Unleashing the Secrets of Hot Rocks: A Guide for Metal Detectorists
Hot rocks are a common nuisance for metal detectorists, but they can also be a sign of valuable minerals and metals. In this DIY-style post, we will discuss what hot rocks are, how to identify them, and what you can do with them.
What are Hot Rocks?
Hot rocks refer to rocks or minerals that emit an electromagnetic field that interferes with the signal from your metal detector. These signals can cause false readings on your detector and make it difficult to find actual targets.
Hot rocks come in many different forms. They may be sedimentary, igneous or metamorphic rocks, such as shale, granite or schist. Many hot rocks contain iron-bearing minerals like magnetite or hematite which makes them magnetic. Others may contain sulfides like pyrite (fool’s gold) which creates electrical conductivity in the soil around it.
Identifying Hot Rocks
One way to identify hot rocks is by using a ground balance feature on your metal detector. This setting helps neutralize the effect of any mineralization present in the ground so that you can more accurately detect metallic objects.
Another way to identify hot rock is by checking their weight and shape. Because many hot rocks have high densities compared to other types of material found underground, they tend to weigh more than normal soil and debris. Also because of their density they don’t break down easily over time resulting in angular shapes rather than being rounded like river stones.
Moreover, if you’re detecting near volcanic areas where there might be obsidian (volcanic glass), then these black colored shiny stones could also interfere with your detection signal as they too have high conductive properties due to its composition.
Dealing with Hot Rocks
If you’re struggling with detecting signals due to nearby hot rock presence – all hope isn’t lost! There are several things you can try doing instead:
1) Switch up your search location: If possible change locations within your search area away from hot rocks.
2) Change your detecting frequency: If you have a multi-frequency detector, try switching to a higher or lower frequency which could lessen the interference from hot rocks in that area.
3) Use a smaller coil: Smaller coils can help reduce the effect of mineralization on your metal detector’s signal and make it easier to detect actual targets.
4) Dig deeper: Sometimes, hot rocks may be closer to the surface so digging down further can help you find targets below them.
5) Use a rock pick: For larger sized hot rocks that are interfering with your detection signals, use a rock pick to move them out of the way.
6) Consider using an XRF analyzer – this is more expensive but it will accurately identify all types of minerals present underground beyond just “hot rock.”
Conclusion
Hot rocks may be frustrating for metal detectorists, but they can also lead to valuable finds. By understanding what causes these interferences and how to deal with them effectively, you’ll be able to improve your chances of finding those hidden treasures. Remember, patience is key when metal detecting – don’t get discouraged if you come across some hot rocks!