In my world, I am looking for a crater formed by a meteor impact that deposited a large number of resources there. The final crater should be 200 miles in diameter. I would like to do this with minimal effects on the rest of society. The meteor, however, would be made of a material that doesn't necessarily have to be rock or ice or iron; it has many mystical properties. The site of the impact is uninhabited and the nearest civilization is across a body of water 2000 miles away. My question is, using this material, is it possible for such a large crater to form without extinguishing human civilization? Feel free to make up any properties of the meteor that make it easier for the crater to form and/or keep civilization intact.
I've used two impact simulators: the Earth Impact Effects Program with my hypothetical inputs here - (most of the inputs are guessed based on the program's guidelines in order to create a crater large enough) - and the Asteroid Collision Map, where the biggest preset for meteor diameter, 15000 m, shows worldwide fallout. For the Earth Impact Effects Program (which I'm assuming is more accurate because it is created by two major universities), it shows an earthquake at 11 on the Richter scale, larger than any ever recorded, so the scenario seems pretty much impossible with conventional meteors.