QAPF Diagram 1 of 2

[@kellybmackenzie]

Geosciences student here, you've helped me so much, thank you!

[@prabhakarpriyadarshi8616]

Lot of thanks man... u made IUGS classification so easy to understand... earlier i spent 4 hrs to understand it through Winters... i understood wayyyy better in your 2 videos... Thanks a lot... pls keep up the good work...

[@daneandersen8181]

Prabhakar Priyadarshi Happy to help!

[@produzionijps6923]

thanks, that was actually a very good explanation! thanks from Italy!! :)

[@coffeecodec4179]

That was a pretty good explanation, I got it now, thanks :)!

[@daneandersen8181]

Coffee Codec - Glad to help!

[@Abi-v4t]

A very clear description - thank you.

[@thedetectorist108]

Thank you so much, reading the diagram's or descriptions of them is useless without seeing an example shown.

[@michelapomata5799]

thank you for the clear explanation! if i pass the archaeometry exam i will thank you again! :)

[@Mmd.B]

Did you pass it ?

[@michelapomata5799]

@@Mmd.B i did!

[@stevenbaumann8692]

I was going to do this but I found this. Thanks!

[@soothingsound50]

thank you for the cleare explaination, really helped

[@EA_Pepple]

This is so helpful

[@dirkbradford6218]

Thanks a lot haven't start patrolgy yet but I start reading ahead but this video give me a clear understanding.

[@ZSMUU]

For the example you explained, What if there was some percentage of alkali feldspar? what will happen with the third line?

[@hananehbika3652]

thank you so much but do you plz know any application do this jub directely ?

[@anatorresmo8450]

Hey Dane, you didn't recalaculate to 100%, why ?

[@NguyenHoang-ui6qo]

Do you know why Q and F cannot exist together ? They said due to chemical reasons, but I need more detail, please.

[@rayres1074]

Magmas saturated with silica will crystallize quartz, because only these magmas have so much free silica that at the end of precipitation there is enough free silica for it to crystallize pure. In the other hand only magmas unsaturated with silica will crystallize foids, as they will show up when there's a lack of free silica to complete the structures. So saying that quartz (which implies abundance of free silica) and foids (which imply lack of free silica) is wrong

[@rayres1074]

It's not a chemical matter per se but an environmental matter in terms of chemical availability. Just like you'd ideally eat a nice meal, but you don't have that much food, so you have to accept only having a snack

[@snakehead214]

If i remember corectly, Q and F react to one of the 2 feldspars. So as long as there is some of both, it will react.When one is completely "gone" into reactions, only the other one will be left in the stone :)

[@xyzsade98]

Thanks!

[@tl9150]

Thanks! Can you do one on QAP diagrams?

[@athi8758]

is Plutonic rocks less 90% a mafic composition? and is volcanic rocks M less than 90% also mafic composition?

[@athi8758]

sorry, I figured it out, it depends on the diagrams mineral compostion displayed. e.g. Rhyolite = felsic, gabbro = mafic.

[@NoelioKearog]

Great video man, thanks a lot

[@venky4488]

Very nice explanation...thanx

[@nosian7279]

Sir make a videos on mechanism of folding, faulting and joint? Plzz

[@janvigupta5279]

Thank you 😊

[@radenaldaffa6757]

Very helpful 🙂👍

[@3lasamirelmesal752]

thanks man good luck

[@akshayshingade7548]

I love it🤗

[@evelynohene-gyan9728]

Thanks

[@1.4142]

This diagram is classified as neutral evil.

[@emrosay]

can someone help me with finding the specific gravity?

[@rayres1074]

G = weight of mineral in air / (weight of mineral in air - weight of mineral in water) accordingly do Dana

[@rayres1074]

Alternatively, D = ZxM / NxV where Z is the number of atoms in an unit cell, M is the molecular weight, N is Avogrado's number and V is the volume of an unit cell

[@behzadamiri9744]

perfetto

[@col.hanslandaofthegrammars9120]

The units are volume percent (% vol.). Never liked how geology diagrams so seldom provide units or labels

[@daneandersen8181]

Agreed - and thats an important distinction to be made. I guess since its a visual classification, its assumed it % vol. and not weight

[@lee-anlu6946]

okeyh?

[@SharonDavis-v6n]

Thomas Helen Brown Eric Davis Sharon