海洋沉积物孔隙水硫酸盐的硫、氧同位素组成及其对硫生物地球化学过程的指示  

Oxygen and sulfur isotopes of pore water sulfate and the implications on biogeochemical sulfur cycle of marine sediments

作　　者：谢智斌 宫尚桂 冯东 XIE Zhi-bin;GONG Shang-gui;FENG Dong(Shanghai Engineering Research Center of Hadal Science and Technology,College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China)

机构地区：[1]上海海洋大学海洋科学学院,上海深渊科学工程技术研究中心,上海201306

出　　处：《矿物岩石地球化学通报》2023年第2期389-401,共13页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金资助项目(42225603,42176056,41906046)。

摘　　要：海洋沉积物中由微生物硫酸盐还原作用(MSR)驱动的碳、硫耦合作用及甲烷消耗,是影响全球碳、硫循环和气候变化的关键生物地球化学过程。准确认识微生物硫酸盐还原代谢过程及其环境影响因子,是探究MSR驱动的碳、硫循环及生态环境效应的重要基础。沉积物孔隙水中硫酸盐的硫、氧同位素组成是揭示MSR过程及其驱动的硫循环的重要方法。本文从细胞内代谢途径和胞外硫循环过程角度,厘清影响孔隙水硫酸盐硫、氧同位素组成的硫的生物地球化学过程,阐述其在示踪有机质驱动和甲烷驱动的硫酸盐还原过程类型及“隐秘”硫循环的意义,为探究微生物硫酸盐还原作用在地球表层环境演化中的作用提供新启示。The coupling of carbon and sulfur cycle and methane consumption in marine sediments driven by microbial sulfur reduction(MSR)are key biogeochemical processes that regulate the global carbon and sulfur cycle and climate change.Accurate understanding of microbial sulfate reduction metabolic processes and environmental impact factors is an important basis for exploring MSR-driven carbon and sulfur cycling and ecological effects.The sulfur and oxygen isotopes of sulfate in sediment porewater provide deep insight of the MSR progress and its driven sulfur cycle in marine sediment.This paper clarified the biogeochemical processes affecting the sulfur and oxygen isotope composition of porewater sulfate from the perspective of intracellular metabolic pathways and extracellular sulfur cycling processes,and illustrated their significance in tracing the types of organic matter-driven and methane-driven sulfate reduction processes and the"hidden"sulfur cycle,providing new insights into the role of microbial sulfate reduction in the evolution of the Earth′s surface environment.

关 键 词：微生物硫酸盐还原作用 甲烷厌氧氧化作用 硫化物氧化 “隐秘”硫循环 生物地球化学 

分 类 号：P593[天文地球—地球化学]