Mineralogical control on the fate of continentally derived organic matter in the ocean
Mineralogical control on the fate of continentally derived organic matter in the ocean
复制标题
矿物学对海洋中大陆有机物命运的控制
DOI：
10.1126/science.aax5345
复制
发表时间：
2019-11-08
期刊：
影响因子：
56.9
通讯作者：
Eglinton, T. I.
中科院分区：
文献类型：
--
作者：
Blattmann, T. M.;Liu, Z.;Eglinton, T. I.
有机质含量和矿物表面积之间的一阶关系已被广泛报道，并涉及有机质的稳定和长期保存。然而，有机矿物相互作用的性质和稳定性及其与矿物组成的联系仍然不确定。在这项研究中，我们发现，大陆衍生的有机质成壤起源剥离蒙皂石矿物表面放电后，分散，并在远洋环境中的沉积。相比之下，有机物来源于与海洋领域的云母和云母紧密相关的古老岩石。这些结果意味着，在海洋沉积物中的陆源有机质的持久性控制的页硅酸盐矿物学的一阶。
First-order relationships between organic matter content and mineral surface area have been widely reported and are implicated in stabilization and long-term preservation of organic matter. However, the nature and stability of organomineral interactions and their connection with mineralogical composition have remained uncertain. In this study, we find that continentally derived organic matter of pedogenic origin is stripped from smectite mineral surfaces upon discharge, dispersal, and sedimentation in distal ocean settings. In contrast, organic matter sourced from ancient rocks that is tightly associated with mica and chlorite endures in the marine realm. These results imply that the persistence of continentally derived organic matter in ocean sediments is controlled to a first order by phyllosilicate mineralogy.