My ore deposits class was never this straightforward. I was constantly overloaded with minutia and struggled to grasp the big picture. You are an excellent teacher!
Academic research, by it's very nature, seeks more and more detail for the chance to make a discovery that has not been covered by previous workers. Occasionally that pursuit makes spectacular discoveries in science, but we entrust those same people with training new geoscientists who need to understand the big picture before diving into the detail. Only a few of them are able to step back and remember what it was like to see a phase diagram for the first time.
These geology and mineral introductions are very much appreciated thank you. Like many viewers, I'm grateful for the encyclopedic and insightful detail to context you provide.
Low sulphidation systems used to be thought of as a separate species, but it now appears that some of them are distal or evolved parts of the same fluid systems.
Learning the (ropes) Rocks> excellent, lots of scratching around for Iron Ore between M Anuong past Phonsavon M Kham and M Hiem! Chinese want that Iron ore it seems, just uploaded some GPS maps for Lao Sanxia Minerals (Rio Tinto) mining seems to be opening up here
Thank you for the video. Your video is really helpful. I'm currently doing a research about High Sulfidation Epithermal deposit for my final assigment but I still can't determine which one is alunite and which one is pyrophyllite during my field mapping. I already took a lot of notes on how to describe and differentiate those 2 minerals from you video and I hope it'll be a very useful guide for me during my field work. Keep up the good work sir 😁
Sericite is basically a bucket term for white micas formed by alteration. Most of them have crystals large enough to see some reflections in the sunlight with a handlens, particularly on freshly broken dry surfaces. Even the really fine grained ones have a silky appearance that is different to the dull waxy sheen of pyrophyllite.
Dear, could you share with me a clear image where the pyrophyllite and alunite, of advanced argillic, are observed, that is, when it does not look crystalline, please!
The sample at 2:24 in the video is typical of pyrophyllite without obvious crystals in advanced argillic alteration systems. Alunite almost always shows some crystal reflections even when it is an alteration mineral (like the examples at 1:16), but they are much finer grained than the infill alunite in veins.
I have a claim out in SW New Mexico. The old miners targeted white caliche-like patches to start the shafts. Are these hydrothermal or epithermal vents?
@@runnikcatti5997 OK, so the white patches are probably indicating acid groundwater leaching due to weathering of sulphide in the veins. Not original hydrothermal vents, but a good exploration indicator!
My ore deposits class was never this straightforward. I was constantly overloaded with minutia and struggled to grasp the big picture. You are an excellent teacher!
Academic research, by it's very nature, seeks more and more detail for the chance to make a discovery that has not been covered by previous workers. Occasionally that pursuit makes spectacular discoveries in science, but we entrust those same people with training new geoscientists who need to understand the big picture before diving into the detail. Only a few of them are able to step back and remember what it was like to see a phase diagram for the first time.
This is excellent, thank you for making this available online!
Glad it was helpful! Hope you find some where you are working.
I've studied alteration halo's but never knew this. 🤔 There's a big leap in geology in field and in classroom.
That's exactly why I make these videos!
These geology and mineral introductions are very much appreciated thank you. Like many viewers, I'm grateful for the encyclopedic and insightful detail to context you provide.
The earth encyclopedia has a lot more pages than I can read. It is an endless source of interesting video matrial!
Sir, thanks for your kindly sharing lessons and really appreciate and respect on your geology expertise like a treasure.
Thanks very much for taking the time to comment. Much appreciated!
The labels in the video rotate with the hand samples. Nice touch!
Thanks. Davinci Resolve tracking is a useful tool!
Thanks a lot! I work with low sulphidation epithermal deposits and this kind of videos are really interesting for get a wider vision!
Low sulphidation systems used to be thought of as a separate species, but it now appears that some of them are distal or evolved parts of the same fluid systems.
Excellent video. Let's go for more videos like this. Congratulations!!!
Thanks. The mineral ID videos do seem to be the most popular!
Learning the (ropes) Rocks> excellent, lots of scratching around for Iron Ore between M Anuong past Phonsavon M Kham and M Hiem! Chinese want that Iron ore it seems, just uploaded some GPS maps for Lao Sanxia Minerals (Rio Tinto) mining seems to be opening up here
Thanks Don. Should make some Lao geology videos in September.
fantastic explanation, thank you so much
Thanks. Fortunate to have such good examples!
Thank you for the video. Your video is really helpful. I'm currently doing a research about High Sulfidation Epithermal deposit for my final assigment but I still can't determine which one is alunite and which one is pyrophyllite during my field mapping.
I already took a lot of notes on how to describe and differentiate those 2 minerals from you video and I hope it'll be a very useful guide for me during my field work.
Keep up the good work sir 😁
That's great. Hope it helps.
What is the benefit to know the alunite in the field?
It commonly forms a halo around high sulphidation epithermal style gold deposits. That's a pretty useful guide!
is there a field test to distinguish sericite from pyrophyllite
Sericite is basically a bucket term for white micas formed by alteration. Most of them have crystals large enough to see some reflections in the sunlight with a handlens, particularly on freshly broken dry surfaces. Even the really fine grained ones have a silky appearance that is different to the dull waxy sheen of pyrophyllite.
Thanks again, so very much!
Thanks Walter. Glad it helps.
Dear, could you share with me a clear image where the pyrophyllite and alunite, of advanced argillic, are observed, that is, when it does not look crystalline, please!
The sample at 2:24 in the video is typical of pyrophyllite without obvious crystals in advanced argillic alteration systems. Alunite almost always shows some crystal reflections even when it is an alteration mineral (like the examples at 1:16), but they are much finer grained than the infill alunite in veins.
thank you very much dear
this maybe a silly question ... but canyou polish aluntie that mixed with sandstone ???
You probably could, but since it is a lot softer than the quartz grains in a sandstone, it would be difficult to get a smooth surface.
Olá amigo excelente canal nova escrito gosto de pedras y conhecer mais os minérios !👍😉
Hi
I am failing to see the link for the topic you discussed on alunite alterations and associated gold copper deposits
The link is in the video description, but I will put it here also geologyupskill.thinkific.com/courses/fieldcraft-for-geologists
Thanks you mister
Well done. Thanks!
Glad you liked it!
Nice video,
Thanks Djamal.
taking a walk with you could be very prosperous!, fancy a stroll?
I should do more face to face training in the field!
I have a claim out in SW New Mexico. The old miners targeted white caliche-like patches to start the shafts. Are these hydrothermal or epithermal vents?
It depends what the old miners were mining.
@@GeologyUpSkill Cu, Pb, Ag & Au
@@runnikcatti5997 OK, so the white patches are probably indicating acid groundwater leaching due to weathering of sulphide in the veins. Not original hydrothermal vents, but a good exploration indicator!
👌👌👌
Interested in coming to lower Michigan?
Have you seen something similar there?
Muito bom!
Thanks!