Paleoclimatic fingerprints of ferromanganese nodules in subtropical Chinese soils identified by synchrotron radiation-based microprobes
Paleoclimatic fingerprints of ferromanganese nodules in subtropical Chinese soils identified by synchrotron radiation-based microprobes
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同步辐射微探针识别中国亚热带土壤铁锰结核的古气候指纹
DOI：
10.1016/j.chemgeo.2019.119357
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发表时间：
2020-01
期刊：
影响因子：
3.9
通讯作者：
Lu Shenggao
中科院分区：
文献类型：
--
作者：
Yu Xiuling;Wang Yefeng;Zhou Guangzhao;Peng Guanyun;Brookes Philip C.;Lu Shenggao
锰铁结核是土壤中重要的成土标志。它们通常以清晰表达的环状结构为特征。尽管这些特征被认为是重要的环境指纹，但它们形成的原因仍有待解释。在这里，我们通过非侵入性同步辐射技术和先进的分析方法的协同使用来解释这些指纹。结果表明，土壤结核是在土壤干湿交替循环过程中，由非生物因子和生物因子共同介导的土壤基质孔隙网络填充而形成的。因此，环状结构是土壤氧化还原历史的记忆。环状结构元素组成的变化反映了环状结构形成时的土壤水分状况。其孔隙度反映了土壤氧化还原电位的变化率，土壤氧化还原电位主要受降水的影响。
Ferromanganese nodules are important pedogenic indicators in soil. They are usually characterized by clearly expressed ring structures. Although these features are believed to be significant environmental fingerprints, the reasons for their formation still await interpretation. Here, we interpreted these fingerprints by the synergistic use of noninvasive synchrotron-radiation based techniques and advanced analytical methods. The results revealed that the soil nodules were formed due to the filling of the pore networks of the soil matrix that was mediated by both abiotic and biotic factors during alternative soil wetting-drying cycles. The ring structures are therefore the memories of the soil redox history. The variations in elemental compositions of the ring structures indicates the soil moisture conditions at the time of formation. Their porosity reflects the rate of change in soil redox potential and the soil redox potential is mainly affected by precipitation.
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DOI：
10.2136/sssaj1979.03615995004300030024x
发表时间：
1979-05
影响因子：
2.9
作者：
J. L. Richardson;F. Hole
通讯作者：
J. L. Richardson;F. Hole
缅甸玛珥湖 Twintaung 碳酸盐岩对印度夏季风长达 530 年的记录
影响因子：
--
作者：
Qing Sun;Yanbin Shan;Sein K;Youliang Su;Qingzen Zhu;Luo Wang;Jiming Sun;Zhaoyan Gu;Guoqiang Chu
通讯作者：
Guoqiang Chu
DOI：
10.2136/sssaj1996.03615995006000040042x
发表时间：
1996-07
影响因子：
2.9
作者：
G. White;J. Dixon
通讯作者：
G. White;J. Dixon
DOI：
10.2136/sssaj1976.03615995004000050034x
发表时间：
1976-09
影响因子：
2.9
作者：
U. Schwertmann;D. Fanning
通讯作者：
U. Schwertmann;D. Fanning
影响因子：
2.2
作者：
Min Zhang;A. Karathanasis
通讯作者：
Min Zhang;A. Karathanasis