6533b825fe1ef96bd1281dc8

RESEARCH PRODUCT

Two-Stage Origin of K-Enrichment in Ultrapotassic Magmatism Simulated by Melting of Experimentally Metasomatized Mantle

Stephan BuhreMichael FörsterBo XuStephen F. FoleyDejan PrelevićDejan PrelevićRegina Mertz-kraus

subject

Peridotitelcsh:Mineralogylcsh:QE351-399.2lamproites010504 meteorology & atmospheric sciencesLithologyultrapotassicTrace elementGeochemistryGeologyUltrapotassic igneous rocksengineering.material010502 geochemistry & geophysicsGeotechnical Engineering and Engineering Geology01 natural sciencesK-enrichmentMantle (geology)MagmatismengineeringPhlogopiteSedimentary rockhigh-pressure experimentssubduction zonesGeology0105 earth and related environmental sciences

description

The generation of strongly potassic melts in the mantle requires the presence of phlogopite in the melting assemblage, while isotopic and trace element analyses of ultrapotassic rocks frequently indicate the involvement of subducted crustal lithologies in the source. However, phlogopite-free experiments that focus on melting of sedimentary rocks and subsequent hybridization with mantle rocks at pressures of 1&ndash

10.3390/min10010041http://dx.doi.org/10.3390/min10010041