Introduction to Logging Drill Core 

Agreed!

Thanks. That is part of the reason I have been making this video series.

Thanks. Glad you found it useful!

Thanks. I probably should make a video on geotechnical logging as well. Just need the right opportunity with someone who knows their stuff and is happy in front of the camera.

Thanks. I try to keep them succinct.

Great Ben. Passion makes work easy!

Great! Most of my videos are aimed at preparing undergraduate students for the tasks they will encounter outside university. I can provide a group discount package for students at Camborne if you would like to give them access to the extended versions of all the videos.

Thanks very much. Glad you found it useful.

Conventions varybetween different companies, but normally, the orientation line on the bottom of the core is simply stopped at the break. If it can be continued (at lower confidence) a different colour or pattern of line may be used. Some good comments are here: www.orefind.com/blog/orefind_blog/2012/11/12/drill-core-orientation---an-inconvenient-truth-(part-3-of-3)

Either method will work. The absolute rule is to make sure everyone working on the core uses the same system and the people using the data know which method you are using.

@@GeologyUpSkill Great. Thank you for your prompt reply! Keep exploring.

And all unscripted!

Petrol powered brick saws are a popular option for remote mobile sites.

Thanks Diakaridia. I'm glad you find the information useful!

Are you Malian

@@idipped2521 Yes, of course I'm, sir.

The driller maks a line that represents the lowest edge of the core in each drill run. The geologist then tries to match up those marks from run to run. If they match well, you can be confident that the orientations are good and you can mark a line along the core that represents the bottom side of the core. Of course this only work for holes that are drilled at an angle. Vertical holes have no bottom side!

Thanks very much. Glad you found it useful.

Thanks. Glad you found it useful.

The general system would be the same, but each company will have different tools to get the job done. VMS deposits may require special handling of the core because it can produce a lot of acid in contact with water, particularly if it is partially oxidised.

@@GeologyUpSkill thank you for answering my question. I am learning a lot from your videos👍🏻

I don't have any experience with open university. Probably best to ask a few potential employer companies if they accept that degree as qualification. If so, go for it.

It is standard practice in most companies to assay the entire length of the drill hole. It may not be necessary where there is a very well understood barren unit (such as cover sediments), but in all other rocks, it helps to build trust in the final resource and sterilize any surrounding rocks for the infrastructure development.

That's the great thing about RU-vid. When you teach something, people anywhere in the world can learn.

Hlo sir can we contact through watsap

This is the full video. Videos that have a more extended version on GeologyUpskill.com will have a trailer at the end to indicate there is a more detailed version available.

Most of the core orientation tools mark the bottom of hole on the last piece of core before it is broken off from the bottom of hole. That gives some certainty about the position. If the core can be fitted back together, the orientation line can be drawn back up the hole until the fit is not possible.

There are many jobs right now. The trick is getting to them.

Alas, I usually work alone. It's one of the things I find most enjoyable about geological mapping work.

Yes, I really should do one on geotechnical logging.

Good idea. Next time I'm on a project with active diamond drilling :)

@@GeologyUpSkill ok good , i pray you get soon

I don't have the procedure manual for that company, but there are some great resources on-line. Here are a few to get you started. canadamines.ca/basics-of-logging-core-samples-for-mineral-exploration/ rogermarjoribanks.info/diamond-drill-core-log-sheets/ rogermarjoribanks.info/category/diamond-drilling/

I think it's an old version of a Corewise saw. You can see some more about that in this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-AUqxwovEBIs.html

@GeologyUpSkill thank you sir.

Hope it helps you in your work.

Thanks. Glad you enjoyed it!

Strictly speaking, most of it is tonalite, but granodiorite is a fair enough description!

It should be!

Some core does look good enough to eat!