Pedosphere 10(3): 265--274, 2000
ISSN 1002-0160/CN 32-1315/P
©2000 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Mineralogy of manganese oxide minerals in iron-manganese nodules of several main soils in China |
| TAN Wen-Feng1, LIU Fan1, LI Yong-Hua1, HE Ji-Zheng1 and LI Xue-Yuan |
| Department of Soil and Agrochemistry, and Ministry of Agriculture Key Lab. of Subtropical Soil Resources and Environment, Huazhong Agricultural University, Wuhan 430070 (China) |
| ABSTRACT |
| X-ray diffraction and selective chemical dissolution methods were used to investigate the composition of Mn oxide minerals in Fe-Mn nodules of several main types of soils in China. The changes of relative intensity of X-ray diffraction patterns were studied both before and after chemically selective dissolution. It was found that lithiophorite was a common Mn oxide in all examined Fe-Mn nodules. Todorokite, however, was a predominant Mn oxide in Fe-Mn nodules in cal-aquic Vertisols of Linyi, Shandong Province. The Fe-Mn nodules of arp-udic Luvisols in Wuhan and Zaoyang, Hubei Province, contained birnessite and vernadite. Hollandite was found in Fe-Mn nodules of alt-udic Ferrisols of Yizhang, Hunan Province; arp-udic Luvisols of Zaoyang, Hubei Province; and cal-aquic Vertisols of Linyi, Shandong Province. The Fe-Mn nodules in alt-udic Ferrisols of Guiyang, Hunan Province, had a few coronadites. Mineralogy of Mn oxide minerals in soil Fe-Mn nodules was related to soil environment, soil types and quantities of relevant cations. |
| Key Words: Fe-Mn nodule, Mn oxide minerals, soil, X-ray diffraction |
| Citation: Tan, W. F., Liu, F., Li, Y. H., He, J. Z. and Li, X. Y. 2000. Mineralogy of manganese oxide minerals in iron-manganese nodules of several main soils in China. Pedosphere. 10(3): 265-274. |
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