Lesson 3 - Taking Representative Samples - Technical level: Intermediate

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Lesson 3 - Taking Representative Samples - Technical level: Intermediate

Рет қаралды 87,662

Күн бұрын

It is very easy to take a non-representative sample which can cost you a lot of money and time. We show you how to do it the right way so that you can trust the assays you pay so much money for.

Пікірлер: 146

@robingibson7503 4 жыл бұрын

Thank you!!! Some of the best classes I've ever had. One was reading geologic maps. That help me find an ancient tertiary

@hardrockuniversity7283 4 жыл бұрын

Knowledge is power. :-)

@glennwmurphy1 7 жыл бұрын

HEY KIETH, I HAVE TO THANK YOU FROM THE BOTTOM OF MY HEART, I MADE A DISCOVERY ON A FRIEND'S PROPERTY THAT HAS COMPLETELY CHANGED HIS LIFE FOREVER, AND IT IS BECAUSE OF WHAT I LEARNED FROM YOU. IT'S A BIGGIE, AND YOU WILL HEAR ABOUT IT. CAN'T SAY MORE YET, BUT...I'D LOVE TO FLY YOU OUT AND HAVE YOU LOOK IT OVER WHEN THE TIME IS RIGHT, PERHAPS YOU COULD DO A VID TITLED: "WHAT MY STUDENTS HAVE DONE WITH THIS KNOWLEDGE", THIS IS A SUCCESS STORY. IT NEVER CEASES TO AMAZE ME HOW WELL HUMANS CAN TEACH EACH OTHER AND WORK FROM EACH OTHER'S KNOWLEDGE, THERE'S NOTHING WE CAN'T DO.

@hardrockuniversity7283 7 жыл бұрын

I am tremendously pleased that my information has been of substantial help to someone. You have made my day! Of course I would be happy to come out and look things over when I have the time. And yes, making videos of what the students accomplish would be great. Thank you, Keith

@brittnicole1209 6 жыл бұрын

I can’t wait to see!

@DeliciousDeBlair 4 жыл бұрын

Congratulations on your find! \(^_^)/

@speaklifegardenhomesteadpe8783 2 жыл бұрын

This is awesome!!! ❣️😁👍❣️💯💯💯💯

@ltsgobrando 2 жыл бұрын

my god... you are a legend. You are a legend! A LIVING MEME!

@hardrockuniversity7283 2 жыл бұрын

Thank you.... I hope. 🙂

@josephbingham1255 2 жыл бұрын

Interesting videos. 9:15 I knew a fellow who had owned a rock shop in Tombstone. At Courtland, Az. he just tired a rope around the base of a large bush and went down a shaft to collect wulfenite crystals. I dug a sample out of a hill in Cochise county. A fellow in Quartzsite brushed some acid on it and said it contained lead, copper, silver and with that combination probably a little gold. When I went back some time later the State of Arizona had a Land restoration/preservation type sign not allowing admittance. No one has mined it still.

@hardrockuniversity7283 2 жыл бұрын

As long as it is unclaimed and on ground open to mineral exploration, the sign probably has no force.

@michaelbrick9730 7 жыл бұрын

great vid, and the pointing out of the hang wall, and etc. I was paying attention to how you were using the ropes to repeal and hold yourself in place.....great job, and thks for sharing......signed, Brickhouse

@hardrockuniversity7283 7 жыл бұрын

Thank you. Good sampling can save a lot of grief. Keith

@TrevsOutbackandGoldAdventures 8 жыл бұрын

Congratulations on your absolutely fascinating and clearly explained series of videos.Great work! Cheers,Trev.

@hardrockuniversity7283 8 жыл бұрын

Thank you very much for your kind words. We are still trying to find a project that gets past the initial survey and rejection phase of the process so we can continues the series through later phases. It is also damned hot down here in Arizona right now and not conducive to filming field work. When I get either a day off from my day job or the test results back from the last mine in AZ I visited I will be able to make another video. If you have any questions, please ask. Keith

@liyumarketshopping 2 жыл бұрын

This should be how the university should be !!!🙏🙏🙏 ❤💛💚

@hardrockuniversity7283 2 жыл бұрын

Yeah, I like hands on.

@Gefan12 9 жыл бұрын

Thank you very much that you spend time with Joakim and teach him new things. would be nice to meet you

@hardrockuniversity7283 9 жыл бұрын

+Anders You are welcome. If we ever get to Sweden we will certainly look you up. If you ever come over here, we can go shooting and gold prospecting if I have time. Keith

@mychannelrace 5 жыл бұрын

Great man with a great information. Love you man

@hardrockuniversity7283 5 жыл бұрын

Thank you for the kind words. I hope it is helpful.

@chrisstrobel3439 3 жыл бұрын

Now I understand why it’s called ‘hard rock’ mining .. it’s extremely hard work! Dang! And I always thought bending over and digging the targets my detector picked up was hard 🙄 lol.

@uturniaphobic 5 жыл бұрын

What did I learn today? I've been looking in all the wrong places. I've actually unknowingly walked past at least 100 surface veins looking for gold out here in Nevada. Back to the old sites!!!

@robertberget5568 7 жыл бұрын

Ha ha I thought I was going to be the only person to say thank you for your information. This is my third video and I have learned a lot. I've watched a lot of videos about mining but was having trouble understanding the vain's and how they are formed. I never thought of different time periods forming.

@hardrockuniversity7283 7 жыл бұрын

You're most welcome. It seems there is a lack of information in the realm of slightly technical. I am trying to fill it. Thanks for the feed back Keith

@ricochetaz3846 5 жыл бұрын

Mr Bowen I have just found MY GOLD MINE and a very rich one it seems to be. It is you and your teachings. I live close by (Pantano AZ) and venture forth as often as possible to the santa ritas to try my simple hand at prospecting. Am not sure what I may have found other than a lot of leaverite and lots of adventure! It has been damn well worth every up hill step though. I just had enough time to view lessons 1-3 WOW how fantastic. Your approach to education is top shelf. I will be a studious apprentice. I can only hope to possibly meet you some day and spend time in the field with you. I have a deuce and half, strong back and open mind also a great desire to learn the correct way to go about hard rock mining. Please keep up the good work, you are the only one out there it seems that is not goofy as a shit house rat or full of bologna! Thank you sir. Rick.

@hardrockuniversity7283 5 жыл бұрын

Thank you for the kind words. I am in Tucson right now and AZ for the winter. It shouldn't be hard to get together. Perhaps you could bring some of your suspected ore by and we could crush and pan it while chatting. You can email me at HardRockU@outlook.com to discuss details. If no reply in a day or two, something has gone wrong and you can comment again. Running samples tomorrow if you are interested. Keith

@N8N8R 5 ай бұрын

How’d you go, Rick?

@StereoSpace 7 жыл бұрын

Fascinating video. Thanks.

@1607rosie 2 жыл бұрын

My hats off to you doing that precariously difficult work. But great mining info just what I have been looking for.

@hardrockuniversity7283 2 жыл бұрын

It looks spooky, but it was a solid anchor so no worries.

@timvincent8649 4 жыл бұрын

Swedish guy here, I'm a musician but this looks really interesting as a side-project for the future! Thank you so much for the information.

@hardrockuniversity7283 4 жыл бұрын

You are welcome.

@kevind3823 5 жыл бұрын

Great information. Thank you sir!

@hardrockuniversity7283 5 жыл бұрын

Glad to help.

@sliperysid 4 жыл бұрын

Great video champ! Thank you.

@hardrockuniversity7283 4 жыл бұрын

You're welcome.

@sams7967 8 жыл бұрын

Great information, Thank you

@bobclark4994 5 жыл бұрын

Thanx very much for the detailed explanation

@hardrockuniversity7283 5 жыл бұрын

You're welcome. Keith

@SaltwaterServr 7 жыл бұрын

Look at all that limonite and hematite in that vein. Even the brecciated portion shows it. If you haven't seen one, look into a Petzl Stop for rappelling/abseiling into shafts. Thing works like a charm. Oh, any of that smell like garlic while you're working it?

@hardrockuniversity7283 7 жыл бұрын

I'll try to remember to check them out at Summit Hut next time I go by there. Thanks

@bluesunessences 4 жыл бұрын

Thanks for your video, good info.

@hardrockuniversity7283 4 жыл бұрын

You're welcome.

@RiskyMethods.81 2 жыл бұрын

Earthquakes. That's why you see newer and older deposits on top of one another.

@hardrockuniversity7283 2 жыл бұрын

Ground movement over long times is a thing.

@pwthomas8596 5 жыл бұрын

So are you saying that where you are taking your samples from was at one time the throat of a extinct volcano?? Very interesting. Thank you from Oregon.

@hardrockuniversity7283 5 жыл бұрын

Not a magma conduit, a hydrothermal water conduit. It would be near the magma, but not involving molten rock itself.

@bonkahermitakaintjudge9228 4 жыл бұрын

Could you please comment back to me as to whether or not that same information about placer deposits can be applied to silver or platinum as well. I own 160 acres of land and Ministry Mining maps and the local university say that silver is quite prevalent in my area and silver mining was done years ago only 2 to 3 miles south of my property.

@hardrockuniversity7283 4 жыл бұрын

Platinum acts very much like gold in placer deposition. They are both unreactive chemically and very dense. Platinum is, in fact, from 'plata' (silver in spanish). In South America years ago the gold prospectors came across a mineral that looked like silver, but would not melt in any furnace they could build. They named it 'platina' for little silver and considered it a nuisance. Silver OTOH is rarely found as native metal, but the minerals of silver are usually dense and will get concentrated in the black sands with the other heavy minerals. You may need to assay your black sands to identify it and the concentration though. Good luck! Keith

@bonkahermitakaintjudge9228 4 жыл бұрын

Keith thank you very much for taking the time to respond. I did subscribe to your channel today as I found it quite a bit more informative than most of the other videos that I have watched about geology and will be following and commenting on an ongoing basis.Again thank for taking the time from what I am sure a busy schedule to answer my questions.

@bonkahermitakaintjudge9228 4 жыл бұрын

P. S. You were very helpful. Some day I’m gonna remember not hit the send button until after I finish my message Lol

@hardrockuniversity7283 4 жыл бұрын

@@bonkahermitakaintjudge9228 I tend to forget to hit send and navigate away. To each their own impediment. :-) Most of the other channels are focused on entertaining the viewers, and there is nothing wrong with that- especially if you are focused on monetizing the channel. OTOH, I am focused on mining IRL and educating the viewers to avoid expensive boondoggles IRL so I am more focused on education while still trying to keep it interesting. I'm having fun and my wife is happy. Enough for me. Keith

@bonkahermitakaintjudge9228 4 жыл бұрын

So I noticed and do appreciate the educational aspect since often a person may not have the time for anything more. Thanks again

@JasonBelgarde 7 жыл бұрын

Great video,thank you....

@hardrockuniversity7283 7 жыл бұрын

You are very welcome. If you have any questions that aren't answered in other videos, please don't hesitate to ask. Keith

@yellowlabdavis7170 2 жыл бұрын

Nice revolver!!

@hardrockuniversity7283 2 жыл бұрын

Thank you. Hate having to need it. Oh well....

@campsitez2355 5 жыл бұрын

You ain't huntin' for gold unless you got your freedom arms casull with ya.

@hardrockuniversity7283 5 жыл бұрын

Don't need a Casull in AZ, nothing big enough. OTOH, in Alaska I might need to upgrade...

@geraldhenrickson7472 5 жыл бұрын

Thanks Keith.

@hardrockuniversity7283 5 жыл бұрын

You are most welcome. I saw your other comments also. I am pleased to help. Keith

@tomharrell1954 5 жыл бұрын

You are a cool dude sir

@hardrockuniversity7283 5 жыл бұрын

Thank you. I try to keep it interesting. :-)

@StephenwBennett 7 жыл бұрын

THank you.

@doliamar659 7 жыл бұрын

Nice video's..

@hardrockuniversity7283 6 жыл бұрын

Thank you

@americanrebel413 5 жыл бұрын

Thank you!

@hardrockuniversity7283 5 жыл бұрын

You're welcome.

@billygraham5589 6 жыл бұрын

Packin' heat!

@hardrockuniversity7283 6 жыл бұрын

Not a fashion statement around there. :-)

@nathandean1687 7 жыл бұрын

if i had the time and gear . i'd go through the enire hill side remove the whole place.

@mosessgoldenberg 7 жыл бұрын

sound is terrible please fix

@EdBragg 8 жыл бұрын

Haven't watched further lessons yet, but did you post the assaying results from these samples anywhere?

@hardrockuniversity7283 8 жыл бұрын

Yep, lesson 6 has the results plus some info on the nugget effect. Hope they are informative. Keith

@DAVIDBUCKLE-TASMANIA 5 жыл бұрын

YeeeeeeeHaaaaaaa

@nathandean1687 7 жыл бұрын

pyrite is being looked at by many company as a cheaper conductor than gold would be.

@hardrockuniversity7283 7 жыл бұрын

Interesting. In what applications? Keith

@nathandean1687 7 жыл бұрын

Hard Rock University any computer part that need gold can be replaced with pyrite. for 1/4 to 1/2 cost the cost of gold. with the same properties of gold.

@hardrockuniversity7283 7 жыл бұрын

Interesting, Thank You. Keith

@nathandean1687 7 жыл бұрын

Hard Rock University if you dont beleave me do your own research.

@keithroy7884 5 жыл бұрын

I've done some research, and I'd have to disagree with the statement of replacing gold. Pyrite is a semiconductor, and can be varied in conductivity by doping with other minerals, as is done with silicon, gallium, etc. Much research has been done in the area of photovoltaics, since pyrite absorbs light efficiently. But some researchers have ended studies, stating that their efforts failed. Pyrite is also brittle, so use as contacts in switches is unlikely, at best. There are still possibilities in semiconductor or pv applications, as new methods and doping materials are being regularly discovered. My references were American Scientist, UC Berkeley, Chemistry World, Minerals.net, etc. Perhaps a recent breakthrough has occurred that is not as yet widely known?

@talonspoint 7 жыл бұрын

Could really use advice on a reliable lab to have assay work done

@hardrockuniversity7283 7 жыл бұрын

I use Chris Christofferson Inc of Kellogg Idaho right now. I had a good friend take a class at his lab and he was favorably impressed. Been a short time, but no complaints so far. Reasonable quick turnaround and $40 per assay, no lower limit that I know of. Keith

@talonspoint 7 жыл бұрын

Thx so much Keith. You'll get a notification from a deleted response as I didn't know a coworker was logged into youtube on my computer so please disregard message from "katelyn". Thx again for your help. It's very appreciated when someone with your knowledge is willing to share information including who they go to for information. I'd love to come down to southern AZ some time during your slow season (if you have one) and talk hard rock mining as I'm just now looking to get into it and sure could use some advice. I promise to buy the steaks ;-)

@hardrockuniversity7283 7 жыл бұрын

Understood. You're welcome. Keith

@binarytradingspecialists2758 7 жыл бұрын

but if we are going to buy ore from mining companies that sell in quantities....what would be the normal price of a metric tone

@hardrockuniversity7283 7 жыл бұрын

That would be highly variable. Somewhere between 50 and 90% of the net smelter return is the range I have heard. Keith

@binarytradingspecialists2758 7 жыл бұрын

Hard Rock University thanks for the response....you see im in greece and im a e waste refiner...for a long time....but it came to me through that work the info that I can buy as many tones as I want of gold ore from the 2 biger mines of gold in europe with are in greece...I thought that would be a good job and faster than e waste...so im learning now through your videos....realy helpful if you have a small idea......

@binarytradingspecialists2758 7 жыл бұрын

most of the ore from what I saw is quartz...im waiting the samples now.....and I would realy whant to know ehat would be the best way to recover the micro fine gold......and the silver from the ore

@hardrockuniversity7283 7 жыл бұрын

There are many ways to recover the precious metal. What is the 'best' way depends on many factors. The SIMPLEST method would be crushing followed by a gravity separation. In order to focus in on the most profitable method you would need to know the ore grade, the size you need to crush and pulverize the ore to in order to get good liberation of the precious metals from the worthless rock, the particle size of the gold, and how well you can recover the values with a gravity separation.. If a gravity separation is not optimal, there are a number of leaching solutions that may do the job. Do you know what the ore grade is? Keith

@binarytradingspecialists2758 7 жыл бұрын

Hard Rock University thanks again Keith.....no I dont know the grade but im waiting 100 kilos of sample to test....I know I will need at least 3 machines..1)jaw crasher 2) pulverizer 3) a shaker gravity table.....I would like to stop e waste refining cauze of the chemicals and ill move to ore recovery.the dificult thing is to find those machines here in greece....ill build the impact mill..but I have to buy from the Us the shaker table.....and for start have to be cheap

@panzerkiller111 7 жыл бұрын

Yall ever do a video on how to sink your own portal? I can't find any videos or demonstrations on how to do it

@hardrockuniversity7283 7 жыл бұрын

The words 'sinking' and 'portal' don't go together. You would 'collar' a shaft which would then be sunk or 'establish' a portal for an adit that would then be 'developed' or 'advanced'. In either case you would generally be most interested in ground support as the rock near surface is weathered and weaker than the deeper rock. Here is a link to a book that is very thorough on ground support. I know it is also available in a PDF somewhere (a copy was sent to me). Why don't you see if that answers your questions and then get back to me if you have any more. Keith

@evanblount4919 7 жыл бұрын

Where is the link?

@hardrockuniversity7283 7 жыл бұрын

www.amazon.com/Timbering-Small-Underground-Mines-Bureau/dp/1495349047 Ooops... Keith

@evanblount4919 7 жыл бұрын

Thanks so much for the quick reply. Love the vids, keep it up. Also could you do some videos on timbering mines?

@hardrockuniversity7283 7 жыл бұрын

I plan to in the future, but I generally video what is on the agenda at the time. If we need to timber something, you can be confident there will be a video. You can also just ask questions. Keith

@johnhoughton9013 6 жыл бұрын

it would be nice to find #2

@hardrockuniversity7283 6 жыл бұрын

Did you try going to HardRockU.com and going to it from there?

@1brigalow 7 жыл бұрын

I've always wanted to wear a sidearm

@hardrockuniversity7283 6 жыл бұрын

It is a bit clumsy at first, but I don't even notice it much anymore except when getting into a seat. Keith

@finefinefineverygood 6 жыл бұрын

Do you know of people named Shirley or Yvonne Bowen?

@hardrockuniversity7283 6 жыл бұрын

No. I know I have some relatives in Utah, but don't know their names. Nobody I know by those names. Keith

@kwgm8578 Жыл бұрын

Hard Rock University -- how do you know that this hole is not part of an active claim?

@hardrockuniversity7283 Жыл бұрын

It is, my claim. You find out by researching land status first and then if it is open to mineral exploration you see if there is an active claim on record at the Bureau of Land Management.

@kwgm8578 Жыл бұрын

That would do it! Thank you for the quick and informative answer. 👍🏼 BTW -- I'm enjoying the series. I'll never again get out there physically -- I'm too damn old and crippled to do more than mow the grass around my small home -- but I always appreciate learning from an expert (it keeps me young). Seeing the mountains that I love, from a different perspective, is a refreshing experience. Sorry, but I can't shut up. One more point. It's good to see that you're not alone out there. It sets a good example for younger, inexperienced prospectors. Some damn fools rappel down a 90' shaft alone, and without a safety man up top to deal with that troublesome man who pops up when you least expect him... Mr. Murphy.

@hardrockuniversity7283 Жыл бұрын

@@kwgm8578 I am happy I can provide you a small amount of happiness. My condition also continues to deteriorate slowly with age. The maintenance is getting quite annoying. 🙂 However, I have overcome a stroke, kidney cancer, an aortic aneurism, and a few more minor issues. I am honored to provide you some entertainment while I can. If you have questions or want to get involved in something a little more interactive, you can always tune in to our Monday night live stream. Start time is 6PM Montana time. I am also blessed with a wife that likes going underground and enjoys camping. Life is good right now.

@kwgm8578 Жыл бұрын

@@hardrockuniversity7283 You've been through "the mill", as my grandmother used to say. May it stay good for a while, friend. I've missed this week already. Maybe next time? Thanks for your note.

@hardrockuniversity7283 Жыл бұрын

@@kwgm8578 You are most welcome. Ask when you have questions.

@notme5371 4 жыл бұрын

They ought to call I it Hard work university

@hardrockuniversity7283 4 жыл бұрын

You bet, micro mining is not for the faint of heart.

@notme5371 4 жыл бұрын

@@hardrockuniversity7283 I know I'm joking. I'm starting to think there may be gold in the rocks I've sampled but that I am missing it in my processing as it's too fine, I'll have to re wash it all with a different method, I may be using too much water volume.

@hardrockuniversity7283 4 жыл бұрын

@@notme5371 The hand panning technique is very well suited to process control. It is very important to know how much you are missing and the particle size. Make sure to watch lesson 24 or Hand Panning Gold 2019 for the easiest version.

@notme5371 4 жыл бұрын

@@hardrockuniversity7283 we'll what I've been doing is running everything through a slice box after I crush it and then panning it. I think I'm losing it(if there is any gold and there should be at least some) in that stage.

@hardrockuniversity7283 4 жыл бұрын

@@notme5371 Most sluices won't catch the micro fine gold in hard rock. You need to pan the sample before sluicing to see what is there to begin with. Keith

@Hughsemailsearch 6 жыл бұрын

Check out mudfossil university, blow your mind, good video.

@DeliciousDeBlair 4 жыл бұрын

Nice looking veins! Did they come to much of anything? ~( 'w')/

@hardrockuniversity7283 4 жыл бұрын

Not really. Only about 1/3 Oz/T and variable width from 4-10". Just not valuable enough for the costs involved.

@DeliciousDeBlair 4 жыл бұрын

@@hardrockuniversity7283 10-4 Maybe next lode... ~( 'w')/

@hardrockuniversity7283 4 жыл бұрын

@@DeliciousDeBlair Working on it all the time. The law of averages should pay off eventually.

@sizlax 8 жыл бұрын

OK genius, I won't try mountain climbing in my house!

@hardrockuniversity7283 8 жыл бұрын

+sizlax I actually trained AT my house. I Hung a rope in a big cottonwood and practiced prussiking up and then re-setting and rappelling down, then re-setting and prussiking back up- all without ever standing on anything. The problem with going down a mine shaft on a rope, is you must be able to climb back up with only the rope.. The most dangerous moment during the filming was when the cameraman, who has not been trained in climbing, moved the catch bucket and knocked down a number of rocks large enough to do injury. Luckily for me, I am also experienced in THAT, so I looked UP and dodged when and in the direction needed. Covering up and hoping is not nearly as effective. Keith

@sizlax 8 жыл бұрын

+Hard Rock University That was mostly meant to be a joke cuz of your "don't try this at home" comment, lol. That's rough with the camera guy though. I bet he got an earful after that XD.

@MrCountrycuz 7 жыл бұрын

How close is this place to Ruby?

@hardrockuniversity7283 7 жыл бұрын

It is just north of Arivaca, about 1.5 - 2 miles. Ruby is about 20 miles south. Keith

@MrCountrycuz 7 жыл бұрын

I was close was I not? I have always been interested in Ruby. My main lizard of interest is the banded gecko.

@hardrockuniversity7283 7 жыл бұрын

I talked to a local that says the tailings lake at Ruby has some seriously aggressive bass. Not safe to eat- heavy metals- but fun to catch. I'd like to try it out sometime. Keith

@MrCountrycuz 7 жыл бұрын

Hard Rock University Probably peacock bass.

@hardrockuniversity7283 7 жыл бұрын

Nope, just largemouth.

@rossm.brownrgrisres3102 4 жыл бұрын

Why not collect 100lbs. or 50lbs. and do the math?

@hardrockuniversity7283 4 жыл бұрын

This is more about getting a representative large sample. A lot of rock may not be very representative.

@nathandean1687 7 жыл бұрын

you forgot drug runners. hey lead an copper is still worth cash.

@bonkahermitakaintjudge9228 4 жыл бұрын

P.S. Please and thank you Lol

@Gefan12 9 жыл бұрын

Hey, you know my son Joakim Anders Olsen Hyltebruk Facebook

@hardrockuniversity7283 9 жыл бұрын

+Anders Good Evening Sir, I am very pleased to hear from you. Joakim is a very pleasant fellow and I enjoy his company. It is fun showing someone who enjoys himself new things, and a good excuse to have some fun. I have been taking pictures and some video and he will be bringing them back with him or sending them electronically sometime in the future. He has now fired an AR 10 and an M1A (both 7.62 NATO). He helped me sight in the M1 with some new match grade ammo my step son Dillon loaded for me. It did very well- 2.5 cm at 100 meters group with 8 power scope. I am also teaching him some local food recipes. We like to eat well at my house. With pleasure, Keith Bowen