Authors: Bekaert, David V., Gazel, Esteban, Turner, Stephen, Behn, Mark D., de Moor, J. Marten, Zahirovic, Sabin, Manea, Vlad C., Hoernle, Kaj, Fischer, Tobias P., Hammerstrom, Alexander, Seltzer, Alan M., Kulongoski, Justin T., Patel, Bina S., Schrenk, Matthew O., Halldórsson, Sæmundur A., Nakagawa, Mayuko, Ramírez, Carlos J., Krantz, John A., Yücel, Mustafa, Ballentine, Christopher J., Giovannelli, Donato, Lloyd, Karen G., Barry, Peter H.
Venue: Proceedings of the National Academy of Sciences
Type: Publication
Abstract: It is well established that mantle plumes are the main conduits for upwelling geochemically enriched material from Earth's deep interior. The fashion and extent to which lateral flow processes at shallow depths may disperse enriched mantle material far (>1,000 km) from vertical plume conduits, however, remain poorly constrained. Here, we report He and C isotope data from 65 hydrothermal fluids from the southern Central America Margin (CAM) which reveal strikingly high 3 He/ 4 He (up to 8.9R A ) in low-temperature (≤50 °C) geothermal springs ...
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Topics: 
Geochemistry
Geophysics
Petrology
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