Experimental Constraints on Recycling of Potassium from Subducted Oceanic Crust

Details Experimental Constraints on Recycling of Potassium from Subducted Oceanic Crust Experimental Constraints on Recycling of Potassium from Subducted Oceanic Crust

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996sci...272.1927s&link_type=abstract

Science, Volume 272, Issue 5270, pp. 1927-1930

Mathematics

Logic

34

Scientific paper

Petrological experiments on oceanic crust samples characterize the recycling of potassium from mid-ocean ridge basalts and sediments. Metasomatism could develop directly and continuously from subducted potassium-bearing crust from shallow levels to a maximum depth of 300 kilometers. Phengite (a potassium-rich mica) is the principal potassium host at subsolidus conditions. It transports potassium and water to depths of up to 300 kilometers and could yield over the entire depth range potassium-rich fluids or melts (depending on the specific geotherm), which are likely to constitute one of the primary metasomatic agents for generation of calc-alkaline magmas.

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