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PG-Prospecting

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PG-Prospecting last won the day on May 8

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  1. So i guess im coming into this a little late. Little back ground on myself i went to college for geology and i am in the process of obtaining my professional geologist license. A few things that have stood out to me in Odin's description of the sample: You say the rock is sandstone and has small olivine crystals in it, and that the size of the olivine indicates a possible martian origin. If it is sandstone then the olivine crystals got there through erosion from a source and hence the size of them would mean nothing since they have been eroded. Olivine on earth can come in just about any size from microscopic to large crystals. (FYI Peridot is just a gem quality crystal of olivine) From this i would have to say that the olivine in the sample is not evidence of being from mars. However from what ive seen of the pieces that Odin has broken off from the sample, i dont believe that its sandstone. It looks like metasandstone, meaning that it is sandstone that has been partially metamorphosed, to the point where it has both characteristics of a sandstone and schist or gneiss. The clay minerals in it have been altered into mica and there is some banding. This type of metasandstone is all over the place in the area i live and can form some interesting weathering patterns and have some interesting mineral assemblages. While Mars has sedimentary rocks, almost all are near the surface and only a few meters thick, this means that mars could not have produced a metasandstone, since that would require greater burial depth to cause enough heat and pressure to change sandstone to metasandstone. No the layering could not formed from the heat of re-entry in the atmosphere. It also potentially resembles a decomposing granite that has undergone some metamorphism. While granite type rocks have been observed on mars they are exceedingly rare there. SO the likely hood of granite type meteorite from Mars is probably next to impossible. As for the outer shape of the sample, i dont see that it indicates any type of entry into earths atmosphere. Rocks form all sorts of wierd shapes that look like various things, and based off of everything else ive pointed out i dont see this being from Mars. I could be wrong, if you really want to find out go here https://geolabs.com/pages/meteorite-identification and send them a sample and they will tell you. Cost is $100 and then you will know one way or the other. Best of luck.
  2. Aufinder777 - The boulder is made of meta-rhyolite. Part of the reason this spot seems possibly right for big nuggets is the geology, there is a lense of meta-rhyolite that is within the surrounding slate/phyllite. So bedrock in the 2 square feet that i exposed was made of phyllite, meta-rhyolite and a quartz vein between them and some quartz stringers in the phyllite. The meta-rhyolite is more resistant then the phyllite so it forms large boulders and most likely a ledge that cuts perpendicular across the creek. So even if it isnt producing the gold, it should be a great catch for any gold that moved over it. So many areas i want to dredge, and so little time, i wish i could retire already lol.
  3. Thanks! And i guess i need to talk louder, i didnt notice the sound issue when i was putting the video together. The propane heater works well, and its much better then the exhaust heater that i bought, that thing never produced enough heat to keep me warm. Yes i got down to bedrock and cleared maybe 2 square feet of it. The last pan in the video is from the day, which was about 3 hours of dredging, came to be just under a half gram. This area definitely hold promise and ive dredged there one other time this year and did pretty well, just a lot of area to cover with a small dredge. Thanks for watching
  4. After much research and mapping, I believe I have narrowed down the area where the old timers found ounce sized nuggets back when my creek was actively being mined. Two areas in the creek fit the description. I had to piece together info from multiple reports and geologic descriptions, then use property boundaries, court house, records, geologic maps, lidar maps and lots of hiking and scouting to find these two areas seem to match. Only time and lots of dredging will tell if i got it right or not. Hope you all enjoy the video and stay tuned for more.
  5. Finally go the video finished of comparing equinox 800 to the gold monster 1000 on in-situ targets in the field. This is my no mean the comprehensive review as im sure the settings on the equinox could be tweaked more produce even better results. But from what i saw on my ground they were vary evenly matched. The gold monster seemed to pop a little harder on the targets, but the equinox still hit all the targets the gm1000 hit. Since i detect mainly creeks the equinox has a leg up since its water proof and i dont have to worry about it getting wet or falling in the creek. Hope you guys enjoy the video and ill take more footage as i work this little patch.
  6. Au Seeker - This should take you to the FB page, ill have to approve you as a member. https://www.facebook.com/groups/378993799241791/?ref=bookmarks Fishing8046 - Yep there is some really nice gold in VA the key is getting access to the old mines since they are all on private property, no claims here. Purity ranges around 21 to 23 karat. Boorx4 - I grew up in Beaver County. I started prospecting after I found out there was gold in VA. It escalated quickly, from a pan to 4 inch dredge in less then a year, and some nice nuggets to boot along the way. I still have yet to prospect outside of VA, but I hope to eventually do some detecting out in Arizona and dredging in Alaska.
  7. Boorx4 - Thanks! Where did you go to school for geology, i went to college for geology at Slippery Rock University of PA. And yes the Potomac has gold in it, but since it is technically in Maryland you cant do any form of prospecting on it. Virginia's prospecting laws are much better. AU Seeker - Yes i was a member of VA gold and i started prospecting at Contrary back in 2014. I never met Shack but ive read many of his posts, since VA gold is gone now i havent heard anything from Shack on any of the other gold prospecting FB pages or other forums. I have started a Virginia Gold Prospectors Facebook Page, so that there is some sort of rallying point for Virginia prospectors, and to help beginners learn the ropes and meet up with other prospectors.
  8. Got out with a buddy this past weekend in the great state of Virginia. We both dredged on sat, then on sunday he continued to dredge and decided to fire the GM 1000 up and see if i could find anything. My buddy was on chucky gold and nuggets with his dredge, so I started detecting a section of exposed bedrock a short distance up stream from him. Got the detector up and running and ground balanced in the water, (settings were auto+ in all metal) swing a few time and she pops off. The probability meter was swinging both ways, I pull out my little crevice tool and pop open the little crack and out pops some nice shiny. Was about a 2.5 grain picker, and ended being my biggest piece for the day. I continue on and each target i hit keeps being gold, which is something i have not experienced before. I will say the probability meter was jumping around on each target, hence why it is ignored lol. All in all i got thirteen pickers in about 1.5 hours from about 5 square feet of bedrock, for a total of 8.2 grains. The bedrock in this spot is decomposed and can be crushed in your hand. I also had a few signals that came from exposed bedrock with no evident cracks, but once i ripped into it with a little pick out would pop a picker. I believe that there use to be a crack there, but since the bedrock is so soft the erosion force of the stream has melded some of the cracks back together. This i why when i hit these soft bedrock spots while dredging i will rip into it up to 6 inches or more. Im stoked i found this little spot. And i will be taking the equinox 800 and the gm1000 there this evening to continue sweeping the exposed bedrock and test both detectors on small gold. Based on what my buddy pulled from downstream a little bit with his dredge, there is the potential for much bigger chucks to be nearby. Pictures below are from his clean out on saturday. And once the exposed bedrock is swept with the detector we will clean up whats left with dredges, so that nothing escapes. Hopefully this little paystreak hold out for a good while and produces some big gold that this locality is known for.
  9. Clay - I mainly use SAGA gis on available DEMs, and i was using Whitebox GAT to turn .las files into DEM files but it would take a few days to process one tile and wouldnt work alot of the time. Ive only just started using QGIS but the newest version no longer supports the las tool box. What artifacts are you referring too? Ive been to that site and what i see on the map is what i see on the ground. I will say ive generally managed to get what i want out of the programs but i still really dont know what most of the features do. Ive found that hillshading helps me the most and ive be accustomed to it to the point where i can read it like a topo map. Ive also messed around with terrain roughness index which brings out certain features better. I will look into SPDLib, i havent heard of it before. Below is another example, hill shaded with color to indicate elevation as well as 5 foot contour intervals. Thanks
  10. Hello everyone - New to the forum, been lurking for a bit though. Im out on the East coast where gold is a bit more scarce but ive had some luck. LiDAR maps are becoming more widely available for free online, and that they provide fantastic data. If you dont know what LiDAR maps are look them up. They are an incredible resource if they are available for your area. For Arizona it looks like a bunch of LiDAR data has been collected in 2018 but it isnt available quite yet should hopefully be available in the next year or so. The link below shows what is and will be available in the US https://coast.noaa.gov/inventory/ The hardest part other then finding the LiDAR is finding programs to render the .las files into more usable DEM (Digital Elevation Model) files. Ive attached below some of my musings with a LiDAR map. Basically the LiDAR helped me determine probably vein trends the old timers were working, and from that determine the areas that would have a higher probabilty of finding nuggets while detecting. You can also extrapolate those vein trends out and hunt well out beyond the old timers working with a better probability of finding gold. Basically it can help you the fringe hunting that Bill talks about in his videos. Hope this helps some people and feel free to ask questions! Its always good to add another tool to your toolbox. Thanks,
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