Deep carbon recycling viewed from global plate tectonics  

作　　者：Maoliang Zhang Sheng Xu Yuji Sano 

机构地区：[1]School of Earth System Science,Tianjin University,Tianjin 300072,China [2]Marine Core Research Institute,Kochi University,Kochi 783-8502,Japan [3]Atmosphere and Ocean Research Institute,The University of Tokyo,Chiba 277-8564,Japan

出　　处：《National Science Review》2024年第6期30-48,共19页国家科学评论（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC)(41930642);the National Key Research and Development Program ofChina(2020YFA0607700);M.Z.acknowledges an NSFCgrant 42072327 forsupport to deep carbon research over the years.

摘　　要：Plate tectonics plays an essential role in the redistribution of life-essential volatile elements between Earth’s interior and surface,whereby our planet has been well tuned to maintain enduring habitability over much of its history.Here we present an overview of deep carbon recycling in the regime of modern plate tectonics,with a special focus on convergent plate margins for assessing global carbon mass balance.The up-to-date flux compilation implies an approximate balance between deep carbon outflux and subduction carbon influx within uncertainty but remarkably limited return of carbon to convecting mantle.If correct,carbon would gradually accumulate in the lithosphere over time by(i)massive subsurface carbon storage occurring primarily in continental lithosphere from convergent margins to continental interior and(ii)persistent surface carbon sinks to seafloors sustained by high-flux deep CO_(2) emissions to the atmosphere.Further assessment of global carbon mass balance requires updates on fluxes of subduction-driven carbon recycling paths and reduction in uncertainty of deep carbon outflux.From a global plate tectonics point of view,we particularly emphasize that continental reworking is an important mechanism for remobilizing geologically sequestered carbon in continental crust and sub-continental lithospheric mantle.In light of recent advances,future research is suggested to focus on a better understanding of the reservoirs,fluxes,mechanisms,and climatic effects of deep carbon recycling following an integrated methodology of observation,experiment,and numerical modeling,with the aim of decoding the self-regulating Earth system and its habitability from the deep carbon recycling perspective.

关 键 词：deep carbon recycling convergent plate margins subduction continental reworking global carbon mass balance 

分 类 号：P736[天文地球—海洋地质]