2024
DOI: 10.31223/x5hh54
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The role of crustal anatexis in porphyry copper ore formation during flat-slab subduction: Insights from the Laramide Belt, SW USA

Thomas Lamont,
Matthew Loader,
Nick Roberts
et al.

Abstract: The prevailing paradigm for the formation of porphyry copper deposits along convergent plate boundaries involves deep-crustal differentiation of metal-bearing juvenile magmas derived from the mantle-wedge above a subduction zone. However, many major porphyry districts formed during periods of flat-slab subduction when the mantle-wedge would have been reduced or absent, leaving unclear the source region of the ore-forming magmas. To resolve this paradox, we investigate deep crustal processes during the genesis … Show more

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