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 Nuggets of News Blog 

Sunday, November 24 2019

A rotary rock tumbler is the most popular and least expensive type on the market today. It has a system of durable rubber barrels that rotate around a metal cylinder to tumble and polish the rocks inside. They are easy to use and create smooth, polished stones in 4-6 weeks. Finished rocks will have a rounded shape regardless of what they looked like when you started. Some models have multiple barrels so you can tumble two different types of rock, or process two batches at different stages of the tumbling process. The opposite type is called a vibrating rock tumbler.
Lortone QT12 rotary rock tumbler kit
Even though all tumblers do the same basic job, the size can affect your results. Not only do larger rock tumblers require more rock to operate efficiently, they also consume more grit and polish. Buy a small tumbler if you are just getting started or plan to tumble smaller loads. Buy a mid-size tumbler if you need to tumble larger stones (2-2.5 inches) or have larger amounts. Most tumblers are rated by weight capacity.

For example, a Lortone 3-pound rock tumbler will rotate three pounds of weight indefinitely. To polish rocks that measure 1.5 inches in diameter or larger, choose a rock polisher with at least a 6-pound capacity. To polish smaller stones, a three-pound capacity tumbler will work very well. Also follow these tips:

  • Make sure the rough stones are all the same hardness, but are various sizes. Tumbling different sizes of rough in the same batch produces better results than tumbling rock of a single size. Don't use rocks that are cracked, have deep voids or have extremely irregular shapes.

  • The barrel must always be at least 1/2 full for the tumbler to operate properly. Be careful not to overload your machine or the motor will burn out. Barrels more than 3/4 full (including grit and water) may not allow enough tumbling room inside, and may be too heavy and burn out the motor. A 3 pound tumbler has a motor designed to tumble a barrel that weighs up to 3 pounds. Weigh your barrel after adding the water if you are not certain.  About four pounds of tumbling rough and coarse grit are the perfect load for a six pound tumbler barrel.
  • Clean the inside and outside rims of the barrel and the edges of the lid carefully. Make sure the surfaces that will form the seal are clean and dry. Then place the lid on the barrel and seal the barrel. Put the barrel on the tumbler and start the motor.
  • If the barrel ever leaks, stop the machine, remove the lid and re-clean the surfaces of the lid and barrel that make the seal. Double-check that they are clean and dry. Replace the lid securely and proceed.
  • If you have a double-barrel tumbler, you might need both barrels loaded for the tumbler to function properly. Fill both barrels with batches of coarse grind of the same hardness so that they can be combined later on. One barrel can then run a batch of fine grind while the other prepares more rough.
  • Do not pour used grit or slurry don't the drain! Discard in the trash instead.


Selecting Beach Pebbles for Your Rock Tumbler

One of the reasons people buy their first rock tumbler is so that they can try to recapture the beauty of sea-wet stones that they saw on a beach during their vacation. If you will be traveling to a beach or live near one, collecting beach pebbles to take home and tumble would seem like a real advantage over buying tumbling rough. After all, the surfaces have been rounded and smoothed by the waves into pleasing shapes, and it looks as if the first step in tumbling— rough grinding to round down the sharp edges— has already been done by Mother Nature. There are two things to watch out for, though.

The first is that sand and wave action can smooth granite or sandstone to the point where it looks polished when wet. The process can't be taken any further. Leave these coarse-grained stones on the beach for others to admire since these two materials don't do well in a rock tumbler. The outside of pebbles can be deceiving, so you may have to break a few open to find out for sure what it's made of.


The second is the tendency to collect large pebbles that are roughly the same size and shape. This is not what you really want to do because successful tumbling requires a variety of sizes of rocks to go in the same batch.
Treat beach pebbles as you would any other material. Select them on the basis of interesting color or pattern and make sure they are made of the same material, or at least the same hardness. Beaches on the Atlantic and Pacific coasts are where you are most likely to find semiprecious stones like jasper. Agates are also common. If you visit those places and have good luck beach combing, all you will have to do is finish what the first tumblers— the waves— have begun. Browse Lortone Rock Tumblers and supplies here.


 

Posted by: Denise AT 04:21 pm   |  Permalink   |  Email
Monday, November 04 2019

gold miningOne of the most frequently asked questions has got to be “What signs should I look for when out prospecting that will indicate good gold in the ground?”  Unfortunately, there is no simple “one-size-fits-all” answer. Gold occurs in so many different types of deposits, therefore, indicators in one place for one type of deposit don’t always work very well for another. But in general, one of the very best places to look for gold today are in places where old-time miners successfully found it in the past. Sometimes there are very obvious signs of their digging and mining. Old-timers never got all of the gold, and they for sure didn’t have the arsenal of tools and equipment like we have today! The following man-made indicators of previous prospecting might help in your modern-day quest for gold:

Ground cuts are basically the trenches in the ground from which ground sluicing gets its name. These narrow trenches carried the water and gravels to the sluice box, and sometimes they were the sluice boxes themselves. Sometimes gold that escaped the sluice box is left within these cuts.

Stacked rocks. In narrow and steep locations there was little room for the miners to move the rocks away. Instead, miners of yesteryear were forced to stack the rocks into walls alongside the stream where they were working. Sometimes unworked gravels lie underneath these stacked rock walls. Keep an eye out for situations where these walls sit on gravel and not on the bedrock itself.

Piles of rocks. In many locations the gravels contain rocks that are too large to pass through the sluice. These big rocks and large cobbles are tossed into piles. The bedrock between them can be very productive, and if they are not too large and deep, you will find that the bedrock underneath them is often productive. It is worthwhile to roll the rocks aside and check out what is underneath.

Areas stripped of ground cover and top soils were often left behind as the mining operations processed these materials for their gold content. Sometimes tiny nuggets will get caught in the rough surface of the bedrock and this can be prime territory for metal detectors designed for nugget hunting.

Ponds and dams. Small-scale ground sluice operations and even larger hydraulic mining operations simply could not afford to bring water from long distances, so they built ponds close by to hold their water above the workings. When you find them, check out the nearby placer workings.

Drywasher piles. In the desert where sluicing was not possible, dry washers were used to process the gravels. These leave distinctive piles of coarse and fine screened materials that are right next to each other. Dry washers are not as efficient as wet sluice operations, so check these piles for nuggets that might have been missed.

Hydraulic Mine Workings. When the old miners found large deposits of gravel caused by erosion, they would dig trenches to bring nearby water to the gravel and use the water pressure to wash away the gravels. Check any exposed bedrock very thoroughly because they frequently missed narrow fissures and cracks that can hold nuggets. Exposed bedrock in and around old workings is always worth checking out.

Although this is not a complete list, it may provide clues about where to look for gold that you may not have considered. To avoid disappointment, remember that an indicator in one location may not hold true in another location. For example, visible vein quartz on the ground is a valuable indicator in some districts, yet you might find a spot where there is so much vein quartz scattered everywhere that it becomes worthless when trying to pinpoint gold. Other places that have good gold might be completely devoid of any visible vein quartz.

One of the great secrets of successful prospectors is that they get out into the field often and work hard at searching. Your mining equipment will not find any gold while stored in your house or garage.  Get yourself out in the field as often as possible and enjoy it to the fullest!

Posted by: Denise AT 05:19 pm   |  Permalink   |  Email
Tuesday, August 13 2019

The type of stones you use for rock tumbling is largely personal preference. But whether you collectrock tumbler them on your own or buy rough stones, for best results stick to stones of similar hardness but of various sizes when tumbling together. This will ensure they all take approximately the same amount of time to reach the proper smoothness, and that harder stones don't damage softer stones during the tumbling process. 

Many types of rock can be successfully polished into stunning gems, especially agates, quartz, and jasper. Agate is the most popular tumbling rough. It is generally inexpensive and can be tumbled with good results by beginners. Agate occurs in a wide range of colors which include: brown, white, red, gray, pink, black and yellow. The colors are caused by impurities and occur as alternating bands within the agate, providing interesting and pretty patterns.

Any rock with a hardness of 5-7 on the Mohs hardness scale will generally take a nice polish in a rock tumbler. Agates have a hardness of 7. Harder rocks usually result in a high-gloss finish. Softer rocks will get smooth and rounded, but they won't take a polish. If the rock looks earthy, it will generally still look earthy when you take it out of the tumbler. Mohs Hardness Scale is named after its inventor, Friedrich Mohs, a German mineralogist. The scale was developed in 1812. He selected 10 mineralMohs Hardness Scales of distinctly different hardness (hardness is the resistance of a material to being scratched) that ranged from a very soft mineral (talc) to a very hard mineral (diamond). Since you always want to tumble together stones of similar hardness for best results, it's important to understand this principle.

The key point to remember in collecting or purchasing rough material for your tumbler is: "quality in means quality out!" Don't waste time and money on grits trying to smooth out crevices and holes in a poor rock. Start out right by only using the type of rocks that are known to provide the best results when polished.

To start, fill the rock tumbler barrel between 2/3 and 3/4 full. Choose rocks of varying sizes, as this will promote thorough tumbling action. A batch of rocks that are all about the same size will often not tumble properly or grind very slowly. For a 3 pound barrel, a good range of sizes is from .25 inch to 1.5 inches. Lortone Rock Tumblers found here.

If you don't happen to live where agates can be found in stream beds or where quartz pebbles can be found along beaches, that's OK.  You can still enjoy tumbling rocks by purchasing the rough materials online. Although it's fun to collect your own rocks, it is often much more economical to purchase them. And remember that collecting on private property without permission is unlawful and that removing rocks from parks and most other types of public land is also illegal.

Rocks NOT to Tumble

It's just as important to know what type of rocks you should NOT tumble, as it is to know which ones with produce nice round and shiny gemstones. Sedimentary rocks such as sandstone, coal, limestone and shale are too soft or poorly cemented to polish into shiny gems. Metamorphic rocks that contain micas or have a "grainy" texture are also unsuitable - they will break up instead of becoming smooth. And, most igneous rocks do not tumble well because they contain several different minerals that wear down at very different rates.

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Posted by: Denise AT 02:21 pm   |  Permalink   |  Email
Sunday, July 14 2019

Alluvial gold refers to tiny gold flakes that come to be through water erosion and movement. In geology, alluvium alluvial goldis loose sediment which has been eroded from a primary source, transported and further eroded by water, and redeposited. Since gold is extremely dense, it is easily trapped alongside other dense alluvial particles. The bits of gold found in these deposits of alluvium are called “alluvial gold.”

The alluvial environment is a very complex one, with many natural forces competing with each other. The forces that lay down gold are a summation of many flood water events of varying intensity that cause the reworking of sands and gravels. Between major flood events, water naturally flows along the already created path and typically the gold present in the gravel or on the surface will not move much. But the larger flooding events can change the drainage routes and even the river’s shape. Some curves can be shut off from the stream and bypassed.  Where the water speed decreases, gravels will drop out of suspension, creating alluvial pay streaks that are typically located along and near the riverbed.

To identify where a pay streak might be located, take the flow of the waterway into consideration. The most productive streaks are formed as a result of major floods that are significant in terms of both water flow and intensity of erosion. Greater amounts of gold are present here as compared to regular gravels. Pay streaks tend to possess a comet-like form. At the “head” or “heart”  is found the richest concentration of gold. At this location, the gravel is coarser and the sandy and silty fraction is much less. This little bit of silt is present only for a few centimeters on the surface, laid down in the last phases of the flood as the silt is dropped. The gold in these gravels is typically small flat flakes, with maybe a small picker or two.

As gold prospectors, our objective is to learn to read a stream and recognize the pay streaks it contains. Think about where you are going to dig before you start and then repeatedly test the gravel you are processing. It is important to consider the presence, form, and depth of the bedrock on which the water and all the alluvial gravel deposits are sitting. In many cases, the gold will naturally concentrate in the lowest part of the riverbed, making a gold-rich path. During high water events, much of the gold is picked up and put back into motion, which leads to forming new pay streaks. Some will be laid back down along the low line of the stream, but may also end up a little farther downstream. The gravels in contact with the bedrock or false bedrock base are often the richest. The same facts apply to the alluvial pay streaks that are formed on gravel bars— the lowest level of the gold-bearing gravel is normally the richest.

The alluvial environment changes over time. Alluvial pay streaks generated 100 years ago could become buried, then subsequently be eroded and exposed again. The erosion might be in part or in total, generating a new series of paystreaks further downstream. Pay particular attention to large boulders and trees. Obstacles like these may partially block the water flow and provide an opportunity for increased gold concentrations, especially behind the obstructions. If there are fissures, holes or natural traps in the stream, be sure to sample these areas, too.

Although high water events are sporadic, when you do find a paystreak caused by one, it can be a very productive spot. Stick with it and keep in mind most are small and narrow and best worked by hand with a sluice and gold pans. 

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Posted by: Denise AT 08:09 am   |  Permalink   |  Email
Tuesday, March 26 2019

For nearly a decade, those of us who admit to watching TV reality shows related to gold mining have been gold rushenlightened and entertained by Gold Rush, White Water, Bering Sea Gold, Under the Ice, Jungle Gold, and others. And the once-ordinary people we’ve gotten to know from these shows— Todd Hoffman, Parker Schnabel, Rick Ness, Tony Beets, Dakota Fred, Emily Riedel, Shawn Pomrenke to name just a few — became celebrities practically over night. In fact, Gold Rush remains the most-watched Friday night program in all of US television among males aged 18 to 49 and women aged 25 to 54! 

With so much scenic footage of places like Scribner Creek, Eureka Creek, and the Bering Sea, it can almost feel like you’ve been there even though the probability of going to Yukon or Nome is as remote as the actual locations. Reality television is a compelling and very influential form of entertainment. It shows real people, real experiences (with some “Hollywood” thrown in) and we somehow relate to them, especially to the “stars” you either love or love to hate. The challenges of inter-miner-relationships that unfold in front of the viewing public can remind you of your own family dynamics, too. But do you actually LEARN anything VALUABLE about gold mining by tuning in?

Beyond the entertainment value, the answer is yes! Whether gold mining is the way you make your living or more of a hobby, there are many similarities between small scale and large scale operations. Let’s say you go prospecting every Saturday during the summer and have a few nice pieces of equipment and accessories that you haul in your truck. Whether you head for public land or a private claim, you know there are no guarantees. You do some research, set up your sluice, shovel the dirt, put in the hours, but some days you just don’t find gold, or perhaps not enough to pay for your gas and other expenses. Parker and Tony and Rick and other reality show stars are pretty much doing the same, except on a larger scale. Instead of a shovel, they use a D10 dozer. We see their big machines constantly breaking down and the bush-fixes they come up with (who knew eggs could help plug a radiator leak!). In comparison, you’ve probably struggled with the pitch on your highbanker, and had to rely on duct tape a time or two! Instead of a Gold Cube or spiral panner, these TV mine bosses use huge shaker tables to recover their gold. Instead of several hours, they wait several days to do a clean-up and are often still disappointed in the results. In other episodes they're elated and cheering at their success, just like we all do when we find a gold nugget!  

Perhaps one important lesson we can take away from these TV shows is about pivoting. If the ground or stream you’re working doesn’t produce, despite the time and trouble you’ve already invested, re-think your strategy. Maybe you’ll have 10 different ideas or locations, but only one of them will really work. That’s OK. Be willing to change your technique or the matting in the bottom of the sluice or try a different piece of equipment than what you’d normally use. Gold mining is a challenge, but as long as you’re reasonable with your expenditures and your expectations, it’s a heck of a lot of fun in the great outdoors. And it also gets you off the couch… just remember to record those reality shows so you can watch them at a later date when you’re not out in the gold fields "making it happening" as Tony Beets likes to say!  Good luck!

Nugget of News Blog

Posted by: Denise AT 06:34 pm   |  Permalink   |  Email
Friday, February 01 2019
Did you know... there is actually more gold still out there waiting to be found today than the old-timers ever gold showrecovered way back in the 1800s gold rush era? And did you also know that attending a GPAA Gold and Treasure Show (Gold Prospector's Association of America) is a great place to get started on your modern day treasure hunt?!
Browse the show floor to find dozens of leading worldwide manufactures and local vendors demonstrating the latest and greatest gold mining and metal detecting equipment, attend free seminars, ask questions of the pros, and enter to win thousands of dollars in door prizes. Pick up a pan for the first time or hone your skills at the panning zone, where skilled instructors will help you recover gold, for free. Keep all the gold you find! 
Saturday show hours 10 am - 5 pm and Sundays 10 am - 4 pm in these cities:
  • Phoenix, AZ: March 2-3, Arizona Expo & State Fair
  • Fresno, CA: March 9-10, Fresno State Fairgrounds
  • Puyallup, WA: March 23-24, Washington State Fair Events Center
  • Portland, OR: March 30-31, Portland Expo Center
  • Denver, CO: April 13-14, National Western Complex
  • Ft Worth, TX: May 4-5, Will Rogers Memorial Center
Visit the GPAA website for more details and to buy your $5 adult tickets; kids 12 and under plus military and veterans with ID are FREE.  If you can, make a family road trip out of attending one or more of the  shows this spring. In addition to the show itself, each city has fun touristy things to do, and if you're a GPAA member, you can visit nearby mining claims.
Whether you’re a family with kids or a lone enthusiast, a GPAA Gold & Treasure Show is your one-stop-shop for all of your gold prospecting and treasure hunting wants and needs. By attending a show, you're sure to have a blast, meet interesting people, find new tools, and learn new tricks of the trade. All of that is enough to make you hollar Eureka!
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Posted by: Denise AT 06:00 am   |  Permalink   |  Email
Sunday, December 30 2018

When prospecting an area that’s known for gold, put yourself in the boots of the old-timers who came before togold indicators help you decide where to begin. Look at your site from all directions and think about what they could and could not do way back then. Your modern-day equipment and knowledge are a lot more advanced than what they had to work with, so you’re already a step ahead! Many times miners jumped in with both feet and started mining to beat the other guys. But being in a hurry meant they could have missed a lot, or moved on too quickly from their original discovery before it was completely worked out. Considering the lay of the land will reveal important clues that can help you better formulate a plan when you're out in the field. Here’s what to look for:

Host rock (or bedrock) could be shale, diorite, granite, quartz, clay or other material. Keep an eye out for changes in the area’s host rock and notice the direction in which it’s running.

Contact zones occur when a rock or mineral cuts or crosses the host rock. Generally, gold is deposited along contact zones, which can be a few inches or several hundred feet wide. If bedrock in your area runs north to south and you notice a color change in material that runs east to west, you’ve found a contact zone.

Outcroppings are a lump of high ground with weather-worn rocks which are generally rounded and usually situated on ridges, but can be located anywhere. Especially look for iron staining on outcroppings.

Ditch lines of yesteryear were generally dug into and run along somewhat level ground. Very close to diggings, especially in hilly or steep terrain, they may have been cut loose to wash downhill.  Follow the old water ditches and see where they end up.

Exploratory trenches were not used for water but most of the time were deeper and would often circumnavigate a rich area that may be throwing gold from clay lines, pockets, quartz seams and any other local contacts. Trenches were dug simply to expose any contacts that may be present. As a contact was crossed, old-timers checked it out in both directions for values.

Rock cairns are piles of rock or stone used for claim corners. Standing high on a slope looking down is a great vantage point from which to spot cairns and other man-made landmarks. By locating a historic claim, you definitely have a great place to begin! 

Posted by: Denise AT 12:31 pm   |  Permalink   |  Email
Monday, October 01 2018

A highbanker, sometimes called a power sluice, is a very flexible and efficient piece of equipment when you’re gold mining in areas with a good amount of water. Their main use is to allow you to pump the water to the gravels rather than carrying heavy buckets of gravel to the water. The optimal place to use a high banker is a location along a river where there are lots of bench gravels that have been lefthighbanker high and dry by erosion. Just shovel material directly into a high banker and let the equipment do the rest of the work! As long as there is sufficient water close by so the hose can reach it, you’ll be good to go. High bankers are available in various sizes. The bigger the unit, the more gravel it will handle in a day. That also means it will likely be heavier and less portable. High bankers are fairly simple to set up and operate. They have three main components: a hopper feed box, and sluice box, and a pump.

Hopper: The feed box contains a grizzly screen with a water spray bar. The water is normally sprayed from simple plastic pipes with a series of small holes drilled into them. A water valve located ahead of the spray pipe controls the amount of water flow going into the feed box sprays. A series of rods are arranged to make a slat-type screen (called a grizzly) that allows water and smaller material to fall through and go down into the sluice box. The large rocks that are caught by the grizzly are washed with the spray and then rejected. The slats should be set on an angle so that most of the larger gravel will slide off the slats by the pull of gravity without you needing to push them off by hand. Some rocks may hang up, but for the most part, they will slide off on their own. The spray water comes out under a lot of pressure and washes any loose sand or clay into the sluice and also provides part of the water needed to move material through the sluicebox area.

Sluice: High bankers utilize a normal sluice to recover the gold from the gravels, and the operation of the sluice box portion of a high banker is basically the same as that of a hand or stream sluice. With a highbanker, the water is supplied by a pump rather than the flowing water of a stream. The matting and miners moss underneath the sluice’s riffles are the same. Gold flakes get caught in the riffles and moss the very same way as it does in a hand sluice.  A nice back-saving bonus on a high banker is that it will be on legs, so you can operate it on any terrain. A normal hand sluice lays on the bottom of a streambed.

Pump: The centrifugal type pump should be set near the water as it is more efficient to pump water uphill to the sluice than to suck it up to the pump. This is only important where there is a lot of vertical distance between the pump and the sluice. If there is less than 10 feet of vertical distance, it does not matter much. Pumps can be set up quite a distance away horizontally from the sluice. It will work so long as there is sufficient water at the source where the pump is located. Vertical distance is more of a problem than horizontal distance; 30-40 feet is the maximum vertical climb for most pumps. The standard lay flat type of hose is used to carry the water up to the feed hopper. Be sure to have enough hose and some extra in case you spring a leak! Remember to position the pump so that you aren’t breathing motor exhaust fumes all day!

The big advantage of a highbanker is working materials that are found in a location away from a river, like benches and other isolated patches of gravel. Moving the water to the sluice with a pump saves you from carrying the material down to the stream.  The only disadvantage to highbanking for gold might be that it’s more equipment to pack around than just your usual digging equipment. It would be wise to test your ground before hauling in your high banker. Testing will indicate if there is enough gold in the gravels to warrant bringing in more than a hand sluice. If you have at least an amount of gravel that represents a full day of digging and sluicing, bring in a highbanker.

The adjustment of a high banker is much less than the steep slope you usually would use with a hand sluice. Adjust the water flow to the minimum flow rate that it takes to get all the rocks that fall through the screen to keep moving down the sluice box section. If rocks or gravel hang up and bury the sluice, you need more water and perhaps a steeper box angle to wash that stuff away. The height of the feed box is another important adjustment. You want it low to allow you an ease of feeding in the material. If too high, you will hurt your back lifting heavy shovels full of gravel. Too low and you may be constantly sweeping away tailings at the back of the sluice.

The feed box itself should be adjusted to ensure the angle of the slat screen rods (the grizzly) allow the gravel to be well washed before it moves out as waste. This is because a lot of small gold adheres too the larger cobbles. If rocks and cobbles just roll through without getting a thorough washing, you will be losing gold. The rejection of the large oversize rocks is important as it lets your sluice to a better job. If those bigger rocks make it into the sluice, you’ll be getting much worse recovery of fine gold.

Be sure the foot valve or strainer on the intake hose is clear and able to deliver a full water flow. Sometimes the foot valve can get clogged with leaves or other debris. A blocked or partially obstructed foot-valve won’t allow the high banker to operate properly. For environmental reasons, it is a good idea to have your water drain into a pond or pit that is not directly connected to the stream. This is so that the clay and mud can settle out, otherwise make sure there are no legal issues of putting that mud back into a flowing stream.

Some models of highbankers can also be run as a dredge. These highbanker/dredge combos can save you money, offer flexibility, but are also a bit of a compromise since the dredge portion is generally small. Combo units will be equipped with a suction nozzle type of intake. This design is best for working small shallow streams and tributaries.  These systems are designed to be set up alongside the stream edge and have adjustable legs rather than float systems that you’d normally see on a larger suction dredge. With a suction nozzle and more hoses, the combo unit will operate as a suction dredge, picking up material from underwater crevices  and delivering it to the sluice. Highbanker/dredge combos also can be ideal for working in and around ponds in old hydraulic mining pits.

The next time you are out in the field, consider if a highbanker or power sluice can help you get more gold. To determine if the answer is yes, ask yourself these questions:  Where is the nearest water? Can I shovel directly from the diggings into the feed hopper? Can I set it up to allow gravity to do a lot of the tailings clearing work? Where will the pump go? With a little thought and planning, you’ll be able to decide if highbanking for gold will increase your productivity. In most cases it will. Move more dirt, get more gold!  Good luck!

Posted by: Denise AT 01:00 am   |  Permalink   |  Email
Monday, August 06 2018

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Posted by: Denise AT 12:37 pm   |  Permalink   |  Email
Monday, July 30 2018

Places where gold naturally concentrates in an environment of streams and drainages are kgold paystreaknown as paystreaks. No matter if you are panning, sluicing, dry washing, or metal detecting, in many ways your success at gold prospecting comes down to locating these elusive natural pay streak concentrations. Keep in mind that most gold paystreak formations occur during times of flooding and that many factors affect how gold gets deposited. Perhaps the biggest factor is that gold is dense and is more than 19 times heavier than water. The denser an object, the more easily it will resist the flow of moving water. That means it takes a very strong and fast moving water flow to move along a nugget the size of a pea.

When deciding where to start sampling, it’s helpful if you think of a river or stream as a sluice box. Waterways obviously don’t have aluminum riffles and matting, however, they do have natural gold traps that do the same thing that a sluice will do— allow gold to settle out of gravels and be caught while the bulk of the sands continue downstream. Heavy material such as gold doesn’t get spread along evenly, it is most likely caught in certain areas. The downstream parts of inside bends in a stream are favorable places to look for pay streaks. Just how good depends on how sharp the bend in the stream actually is. Usually the sharper the bend, the better the pay streak. If a tributary is known to have coarse gold, look at the intersection of the tributary and the main channel.

Behind an obstruction (large boulder, an island, or an outcrop of bedrock) is another good place to look for a pay streak.  Boulders and other obstructions can create turbulence where ordinarily smooth flowing water turns into fast flowing whitewater. It is between the fast white water and the quiet dark water that gold drops out. The coarsest gold tends to be found on the outer parts of the pay streak, and the finer-sized gold is on the inner part of the pay streak. When you are working, if it seems as if the streak is petering out as you go toward the middle of the water flow because you are finding little gold, this region of the pay streak is often where the biggest number of nuggets are most likely to occur.

Once you know where paystreaks form, you might wonder if they are more likely found on bedrock or in gravels. They are nearly always found on bedrock or some sort of false bedrock. False bedrock might include caliche, a clay layer, or just a well-packed hard pan. You may just get lucky and hit something great with your first shovel of dirt, but more likely you’ll need to test a few different places. Even very experienced prospectors need to keep testing to find those hotspots and paystreaks. Good luck and keep sampling!

Posted by: Denise AT 10:17 pm   |  Permalink   |  Email

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