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Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Proc+Natl+Acad+Sci+U+S+A 2017 ; 114 (17): 4324-9 Nephropedia Template TP
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Subduction zone forearc serpentinites as incubators for deep microbial life #MMPMID28396389
Plümper O; King HE; Geisler T; Liu Y; Pabst S; Savov IP; Rost D; Zack T
Proc Natl Acad Sci U S A 2017[Apr]; 114 (17): 4324-9 PMID28396389show ga
We document organic matter encapsulated in rock clasts from a oceanic serpentinite mud volcano above the Izu?Bonin?Mariana subduction zone (Pacific Ocean). Although we cannot pinpoint the exact origin of the organic matter, chemical analysis of the constituents resembles molecular signatures that could be produced by microbial life deep within or below the mud volcano. Considering the known temperature limit for life, 122 °C, and the subduction zone forearc geotherm where such mud volcanoes are located, we estimate that life could exist as deep as ?10,000 m below the seafloor. This is considerably deeper than other active serpentinizing regions such as midocean ridges and could have provided sheltered ecosystems for life to survive the more violent phases of Earth?s history.