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John I

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John I last won the day on March 27 2015

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  1. John I

    Prospecting 101

    Your probably a prospector if: All your outdoor photography consist of pictures of the ground and interesting geologic features. The only pictures you take of people are when their holding, or standing next to something mineral in nature. You ask your partner to drive so that you can study the road cuts that you pass by. When watching a movie, and they pan the camera to a stream or river, your first thought is "I wonder if there's gold there". You find yourself panning down the concentrates....... of your cereal bowl. You day dream about new and interesting ways to move and clean rocks.
  2. John I

    Hand Held Gps

    After switching to a moving map GPS (Garmin Montana 650) I'll never go back to my older units. I do a lot of research before heading out to a new area. Putting together as much information as I can before hitting the road. I used to print all this out, put together a binder and then have to flip trough the various pages to bring it all together mentally out in the field. Using software like Expert GPS I can overlay geologic maps, master title plats, Township Range and Section grids, Downloaded active claim maps (from counties that provide them online) or scanned claim maps, historic topos etc. as well as satellite imagery (great for finding dirt roads that don't appear on topo maps) Using google earth, I layout potential access roads, camp sites and points of interest and upload all this to the GPS. Now when I'm out in the field I can switch to the various overlays and drive around on a geologic map or walk straight to where an active claim corner should be. The 650 has a built in camera that I use to capture sample locations or things of interest that may help direct me where to go on a follow up trip to the same general area. Pictures and tracks are then uploaded to google earth, and I have a nice package of visual data to review when deciding if I want to return and sample different locations. The 650 comes with a rechargeable battery pack, this usually last for a full day of exploring, with the screen on most of the time. When that dies I switch to 3 AA batteries and they last for multiple days of sampling/prospecting, since the unit is off when I'm digging. I figure the cost of batteries is pretty insignificant compared to the overall cost of a 4 day trip with hundreds of miles of driving there and back. The 650 is on the higher side of handheld GPS's, price wise, but what I've gained in productivity when going to new locations, I haven't regretted the purchase.
  3. John I

    Ground Penetrating Radar

    On that episode of Gold Rush, Freddy Dodge hired a couple guys to use GPR to survey the bedrock in the creak they were mining. They then used a drone to image the creak, and then composited the GPR data with the imagery to identify areas of the creak that were conducive to enrichment. They were successful in locating a number of depressions/pockets and areas where the flow should slacken at flood stage. I believe there results (gold in the cleanup) showed that the data was pretty accurate. They had already planned to mine the entire creak, so was it worth the expense? maybe. If you wanted to high grade the creak though, it would show you the areas of highest probability of success.
  4. Do you have a winch setup at your location? If you do, use a rock boat and the winch to haul the cobbles and small boulders far enough out of the cut so you don't have to move them twice. My first rock boat was an old wheel barrow bin. We drilled holes through the front to loop a chain through. Normally I run a three man crew, the rock man fills the boat and the winch man pulls it out of the hole. The rock man empties the cobbles and then drags it back into the hole. If I'm running solo under water, I park the boat close enough behind me so that it's an easy toss to fill the boat. If you don't have a winch, you can still use a boat, just don't fill so much that you can't drag it. This year I'm going to experiment with a small lifting bag to take some weight off the boat and make it easier to drag. The trick is to move the first rocks far enough out of the hole so that they are not in the way as you work down and forward. My general rule is that no rocks will be dumped in the cut until I have reached bedrock and pushed forward several feet. The deeper the gravel, the farther away your first rocks will have to be taken. It is far more efficient to make the cut much wider at the top than one would think necessary. The deeper the gravel, the wider the top cut. If you find yourself working the bottom of a hole that is only 1-2 feet across, go to the top and open the cut wider. If you're cutting straight down, you quickly become boulder bound and you'll spend hours trying to get cobbles and small boulders out. By opening up the cut, you can quickly work around those cobbles with the nozzle to free them up. As far as dredge placement goes, ideally you would have a nice straight hose. In small streams that's not always doable. A single gentle curve is the next best thing.
  5. This link will take you to a downloadable PLSS file that you open in Google Earth. http://www.geocommunicator.gov/ARCGIS/REST/services/PLSS/MapServer Near the top of the page, click on the "Google Earth" link. Save that file to your computer and open it in GE. Now all you have to do is check/un-check, the PLSS box and you will always know what TSR you're looking at. There is also a similar file that shows all BLM lands in GE. If your interested, I will go find where I got that from.
  6. John I

    Gold Drops Under $1500

    I wonder if Cyprus selling off 10 tons of the yellow metal has anything to do with todays drop. http://www.bbc.co.uk/news/business-22106187
  7. I think Keene makes a set of dredge riffles for the A52. They are a much taller Hungarian riffle design IIRC.
  8. A bolt through the nozzle is like having training wheels on a bike. It will keep you from having hose plugs in the beginning, but will cut down dramatically on your daily production. Eventually you learn what rocks will plug your hose. Taking apart a hole without plugging the hose is a skill that has to be learned if you want to move the most material with your rig.
  9. I always love it when the fish murderers get on their high horse.
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