Metamorphism of Pure vs Impure Carbonates (Marbles vs Calc-Silicates) | GEO GIRL

References & helpful resources:
Essentials of Igneous Petrology by Ronald and Carol Frost: amzn.to/37Zs9AL
Earth Materials by Cornelis Klein and Anthony Philpotts: amzn.to/3z5sCxe
Alex Strekeisen site (info + examples!): www.alexstrekeisen.it/english/... (this is the marble P-T-CO2 graphs page, but from there you can click any metamorphic mineral or rock on the left side to see more examples in both thin section & hand sample!)
Rocks PTX: www.rockptx.com/fkm-26-to-fkm... (this site has many sets of thin sections in both PP & CP and identifies the minerals for you; this link will take you to one set, but if you go to the thin sections scans tab, you can look through all the others as well ;)
Atlas of Metamorphic Minerals under Thin Section: www.earth.ox.ac.uk/~oesis/atl...
Thin Section Rotation + Labeled Hand Specimens Website: www.virtualmicroscope.org/col... (just pick a collection, pick a rock sample, and it will show you hand sample pictures, thin sections, and tell you the mineral assemblage)
Thin Section Atlas Book (in color): amzn.to/3HYsrrj
GEO GIRL Website: www.geogirlscience.com/ (visit my website to see all my courses, shop merch, learn more about me, and donate to support the channel if you'd like!)
0:00 Marble Protoliths
2:19 Pure Carbonate Metamorphism
5:15 Quartz Bearing Carbonate Metamorphism
8:46 Impure Calc-Silicate Metamorphism
11:20 Calc-Silicate Formation Sequence
16:09 P-T-CO2-dependent Mineral Transitions in Marble
20:40 Related videos & references
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Disclaimer: Links included in this description might be affiliate links. If you purchase a product or service with the links that I provide I may receive a small commission, but there is no additional charge to you! Thank you for supporting my channel so I can continue to provide you with free content each week! And as always, let me know your topic suggestions in the comments down below!

[@JoesFirewoodVideos]

I think I’ll watch this one for educational purposes not entertainment. I ❤️ GEO GIRL

[@geoscilove6609]

Awesome presentation Geo girl, I am happy that we are getting to learn from someone from another Continent and best thing about that is learning different things because we use different textbooks. I had not learned about P-TCO2 transition previously, happy that you discussed and thanks for the links too.

[@GEOGIRL]

Of course! So glad you found it helpful! Actually I didn't even get the P-T-CO2 graphs from my textbook, I got them from the Alex Strekeisen website, it is such a great resource! Honesetly, I wish I had found these resources when I was taking this class haha!

[@paristexas72]

THANK you so much. you really have helped me better understand my Geology classes.

[@GEOGIRL]

Thanks for the comment! I am so glad to hear that! ;D

[@shivamchawla9252]

Its so cool that Gal Gadot opted geology in her college, btw very much helpful lectures.. Thanks

[@GEOGIRL]

This is my fav comment ever, thank you! ;)

[@princeshukla7661]

Nice presentation

[@Get_to_the_Point]

TY this helps me understand metamorphism better.

[@GEOGIRL]

So glad you found it helpful ;D

[@stevenbaumann8692]

I think it’s great how you use the proper terms. Have you done just metamorphic facies yet? We still have this problem in geology where one guy’s sandstone is another’s quartzite. Especially in the zeolite and lower greenschist facies.

[@GEOGIRL]

Well my first video on metamorphic petrology was kind of an overview and I talked about the line between diagenesis and metamorphism as well as the other end of the spectrum with the line between metamorphism and melting. But I haven't done a video all about facies, that is a great idea, thanks! ;)

[@stevenbaumann8692]

@@GEOGIRL I must go look at that video. I don’t remember it. Keep on doing good work

[@GEOGIRL]

@@stevenbaumann8692 Thanks Steve! And right back at you ;)

[@Smilo-the-Sabertooth]

Another very fascinating video as expected. You’re outstanding videos never disappoint because you always make the best content which is one of the reasons why it’s always such a tremendous pleasure for me to learn with you my favorite teacher. You’re so beautifully gifted and intelligent my friend. You’re the best. 😊❤😉👍

[@GEOGIRL]

Thank you !! You are also the best for being so supportive and encouraging! ;D

[@Smilo-the-Sabertooth]

@@GEOGIRL You’re very welcome my friend. 👍 You’ll always have my full support and encouragement. 😉 I hope you have a wonderful day as well. 😊 You’re absolutely amazing Rachel. ❤️

[@cokemachine5510]

very cool subject GEO GIRL . Can we actually make these rocks? sounds like we know how they we're made. pressures, heat, electricity, what else do you need? pretty sure Ancient builders did it regularly.

[@GEOGIRL]

Absolutely we can! :D

[@mp-qh1um]

awesome!

[@ramchauhan5238]

Very nice explanation..🙃🙃

[@GEOGIRL]

Thank you ;D

[@ramchauhan5238]

@@GEOGIRL most welcome..🙃🙃🙂

[@hemanandasahoo1647]

Awesome explanation🥰. plz send your Geochemistry video link mam

[@GEOGIRL]

Thank you! And I am sorry, but which geochem video are you refering to? Did I refer to something and forget to link it? Thanks!

[@ibrahimkamal3420]

i need more information of magnesite mgco3 which coming from serpentinite rocks

[@GEOGIRL]

Thanks for the comment, I will look into it and see what I can do ;D

[@princeshukla7661]

Love from INDIA :^)

[@somrinzi]

Impressive 👍😁

[@GEOGIRL]

Thank you! ;D

[@manishajindal85]

How to differentiate between a calc-silicate rock and a skarn?

[@GEOGIRL]

To my understanding skarns are calc-silicates. But in general I have noticed that samples defined as skarn seem to be more rich in Mg, Fe, Mn, & Al silicates and just overall 'dirtier' than when I samples defined as calc-silicate, so my guess is skarns are just on the more detrital/silicate-rich end of the calc-silicate scale. Hope that helps ;)

[@manishajindal85]

Skarns are formed when there is igneous intrusion into the carbonate rocks. Can you please shed some light on the origin of calc-silicate rocks?

[@GEOGIRL]

@@manishajindal85 Oh cool I didn't know that, thanks for sharing! Well like I mentioned in the video, the silicates in calc-silicates are mostly detrital in origin (to my understanding) which means they they form in a sedimentary environment, potentially a carbonate platform with a lot of river input from a delta (where the carbonate platform promotes carbonate formation, while the river input adds the detrital silicates). Then after burial, this impure carbonate rock gets metamorphosed into a calc-silicate. Hope that helps ;)

[@princeshukla7661]

Hello geo girl

[@ramchauhan5238]

Looking so beautiful..🙃🙃

[@TheChuckwagonLite]

Plate tectonics of middle earth. How's the archenstone formed

[@GEOGIRL]

Is this a video request? I am not sure what archenstone is? Can you enlighten me? haha

[@TheChuckwagonLite]

You don't know your Tolkien? The hobbit. It belongs to thorin oakenshield

[@GEOGIRL]

@@TheChuckwagonLite Oh my bad! I don't remember that haha

[@princeshukla7661]

Today I am the first who's like and comment

[@GEOGIRL]

Almost every single time it's you, you are so fast! haha

[@ramchauhan5238]

Hii..geo girl...

[@princeshukla7661]

How are you

[@GEOGIRL]

I am doing great! And you? How are you liking the video? ;)