Yep they would use magnetics to find where the magnetite ironstones are, but not every magnetite ironstone contains copper and gold though, and there are so many ironstones in that area that it's difficult to drill a hole and not get ironstone.
I was wondering if there has been any drilling in that area between Rover 4 and Rover 1, and if there has been any drilling, how deep and how effective it has been.
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