Longest pluton

I'm not sure. Deccan Traps in India maybe? Or Siberian Traps?

I remember seeing a programme about picking up meteorites in Australia. Maybe this can help.

https://en.wikipedia.org/wiki/List_of_impact_craters_in_Australia

you want to be looking for things called BATHOLITHS ,of a form specifically called a PHACOLITH. They arent flood basalts or meteorite hits. They are usually acidic rocks that define chains of continental shields or mountain ranges, like ANDES, Sierras, BLCK HILLS, Northern Appalachians, Caleonian Highlands, as well as all granitic shields. Id say , just a guess, tht the AFrican or the Candian Shields are the biggest batholiths ,

Id be very interested in finding such features via satellite. It has lots of economic value. You should be looking for those satellites that have some forms of multispectral scanners .

in us terms a pluton is so called if its bigger than 39 km *2

When I did my geology course, we went a field trip about 20 minutes from downtown Vancouver the see the exposed surface of a plutonic formation. Pretty amazing phenomenon.

I'm afraid you've lost me, you say these Batholiths are a constituent part of mountain ranges and then say satellites should be employed to look for them.

I don't think mountain ranges are difficult to spot with the naked eye, they're pretty big.

many mountain ranges (like the Himalayas) are "capped by sedimentary rocks, an the phacoliths may be there but not eroded.
What Im interested in is the use of stuff like LIDAR and aerial multispec to actually locate specific areas of mineralization. Many batholiths are full of joints (cracks) that occur as the batholith cools . These are area of hot water deposits of all sorts of goodies that geologists and prospectors target. Also, the places where the "lith contacts the original rock can be at depth and these are areas where many other kinds of minerals live.

What you're saying is that we need satellite imagery to tell us if specific minerals are buried deep inside mountains. Am I right? I'm not being awkward, it's a genuine question.

Thank you very much for your input everyone. I'm just looking for any pluton (batholith, sill,etc...) that has been eroded, and longer than 40km. Not really looking at area, so it could be a dike/sill/etc.

Thing is, I don't really hear of really flat areas exposing plutons (40km+) that have eroded.

Will check out the areas you all mentioned!

Farmerman is the resident geologist. He knows what he's talking about.

Sorta, multi pectral scanners can give us a reading of the general "recipe" that a rock body presents. Using an analogy of cake batter, I can spectrally scan and tell the difference twixt a chocolate cake pluton and a vanilla cake pluton. What I may be looking for is a layer associated with the chocolate pluton that contains some gems or metal ores (like the fruit layer in a sacher torte). I still have to drill o do other tests but a sat image is often great place to start in unknown territory

Yes, that's right, Canadian Shields are great! Was checking out the areas suggested.

Thank you everyone!

Sounds similar to what archaeologists say about geophys before they start a dig. It can tell you something, but it might not be at all helpful.

as I was always taught by my mentor"Still, the best geologist is the guy whose touched th most rocks"
Weve got plenty of gizmos that can lead us to areas but we still have to hit the road. (Thats what has made this career so enjoyable and why I quit chemistry) Being locked up in a lab isnt natural to people with obsessive curiosities.