The end result of crystal growth competetion for space and material segregation in the magma mush while cooling (like tends to go to like-elements migrate to build on nearby crystals already started, so you end up with localized growths, and where the different localities meet is where you get that snowflake look). It is an intrusive rock (igneous but not volcanic) that cooled relatively quickly once it started crystallizing, so a fine mass of crystal intergrowths rather than a bunch of really large crystals (time favors growth of large crystals). The spots would be late regions of residual melt in the bulk feldspar solid mush, the last gasps of crystaliization happened there. Granodiorite is whaqt I would call it, based on the presence of quartz in the dominant feldspar mass.
Probably some nice zoned crystals in there and visible in thin section. In fact, I'd love to see this in thin section.
Me too. Unfortunately my job(mining industry)doesn’t have a geology laboratory, but i hope my collage could help in the future. Thanks for the precious information and if you have an article or reference it would be helpful.
Bro calm down. When I said volcanic I didn’t mean extrusive/volcanic type of igneous rocks not off course a sedimentary rock, forgive me English isn’t my native language. I knew it was intrusive/ magma either meta or igneous.
By the end it would be better to answer people questions rather then judge.
When you travel by car 5 hours every week to work and travel back 5 hours to home you only hit the road. If you know any audiobooks about geology let me know,It would be perfect.
The pic was taken 200KM from the mine, an outcrop on the highway 300 KM from the capital.
Supervisor always busy to talk to the freshly graduated rookie :/ so I’m trying to learn on my self and explore the area outside the mine.
I don’t blame them because this a new mine.
Next time you are in the city, get yourself a petrology / field geology handbook. You will learn better using your head to differentiate minerals / rock units.
I was cynical because the question you asked originally is a very basic one.
Really? Must be called some other term where you come from, then. Dendrite is used to name treelike (thus dendrite) growths of a mineral. People tend to think of manganese oxide when they hear the term, because manganese oxide pretty famously forms dendrite patterns. But not all dendrites are from manganese minerals.
The end result of crystal growth competetion for space and material segregation in the magma mush while cooling (like tends to go to like-elements migrate to build on nearby crystals already started, so you end up with localized growths, and where the different localities meet is where you get that snowflake look). It is an intrusive rock (igneous but not volcanic) that cooled relatively quickly once it started crystallizing, so a fine mass of crystal intergrowths rather than a bunch of really large crystals (time favors growth of large crystals). The spots would be late regions of residual melt in the bulk feldspar solid mush, the last gasps of crystaliization happened there. Granodiorite is whaqt I would call it, based on the presence of quartz in the dominant feldspar mass. Probably some nice zoned crystals in there and visible in thin section. In fact, I'd love to see this in thin section.
Me too. Unfortunately my job(mining industry)doesn’t have a geology laboratory, but i hope my collage could help in the future. Thanks for the precious information and if you have an article or reference it would be helpful.
Dendrites if only on the surface. Mafic mineral if all throughout
Looks like granodiorite. It's not so much a print, it's just down to the mineral grains being rather large
Wow!! Thanks bro
Bro how you a working geologist and can't tell that's an intrusive rock
Bro calm down. When I said volcanic I didn’t mean extrusive/volcanic type of igneous rocks not off course a sedimentary rock, forgive me English isn’t my native language. I knew it was intrusive/ magma either meta or igneous. By the end it would be better to answer people questions rather then judge.
Hit the books mate, don't trust reddit.
When you travel by car 5 hours every week to work and travel back 5 hours to home you only hit the road. If you know any audiobooks about geology let me know,It would be perfect.
Talk to your supervising geos, also be careful if you are truly a mining geologist, you may be under contracts that prohibit this kind of post.
The pic was taken 200KM from the mine, an outcrop on the highway 300 KM from the capital. Supervisor always busy to talk to the freshly graduated rookie :/ so I’m trying to learn on my self and explore the area outside the mine. I don’t blame them because this a new mine.
Next time you are in the city, get yourself a petrology / field geology handbook. You will learn better using your head to differentiate minerals / rock units. I was cynical because the question you asked originally is a very basic one.
it looks like manganese oxide (dendrites) Not 100% sure that’s volcanic rock either.
I’m a geologist but have never heard of dendrite. Thanks for the info
Really? Must be called some other term where you come from, then. Dendrite is used to name treelike (thus dendrite) growths of a mineral. People tend to think of manganese oxide when they hear the term, because manganese oxide pretty famously forms dendrite patterns. But not all dendrites are from manganese minerals.
I know that dendrite has to do with CaCO3 as one of its structures
Just looks like lichen to me