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Recycling radiogenic osmium by crustal foundering in subduction zones: evidence from pyroxenite xenoliths in the north Andean arc
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DOI：10.1016/j.epsl.2026.120192.png)
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Abstract
En 中文
• Crust- and mantle-derived pyroxenite xenoliths are differentiated by Re-Os isotopes. • New whole-rock 143Nd/144Nd and garnet δ18O values are reported for pyroxenites. • Arclogites assimilated minor amounts of subducted components and/or older crust. • Os isotopes support crustal origin of pyroxenite interpreted as foundered crust. • Crustal foundering in arc settings can recycle highly radiogenic Os to the mantle.
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