Occurrence Relationship between Iron Minerals and Clay Minerals in Net-Like Red Soils: Evidence from X-Ray Diffraction
YIN Ke1, HONG Han-lie1*, HAN Wen1, MA Yu-bo2, LI Rong-biao1
1. Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China 2. Institute of Jewellery, China University of Geosciences, Wuhan 430074, China
Abstract：The high purity of clay minerals is a key factor to reconstruct the palaeoclimate in clay mineralogy, however, the existence of iron minerals (such as goethite and hematite) and organics lead to the intergrowth of clay minerals and other minerals, producing other mineral impurities in enriched clay minerals. Although the removal of organics in soil sediments has been fully investigated, the occurrence state of iron minerals remains controversial, hindering the preparation of high-purity clay minerals. Therefore, the occurrence relationship of iron minerals and clay minerals in Jiujiang net-like red soils of the middle to lower reaches of the Yangtze River was investigated using the sequential separation method，which provided some implications for the removal of iron minerals in soil sediments. The results indicated that goethite and hematite were mostly absorbed on the surface of hydroxy-interlayered smectite and illite in the form of films, and the rest were absorbed by kaolinite.
Key words：Net-like red soils;Jiujiang;Iron minerals;Clay minerals;Occurrence relationship;Sequential separation
殷 科1，洪汉烈1*，韩 文1，马遇伯2，李荣彪1 . 网纹红土中铁矿物与粘土矿物赋存关系的X射线衍射证据 [J]. 光谱学与光谱分析, 2013, 33(04): 1126-1129.
YIN Ke1, HONG Han-lie1*, HAN Wen1, MA Yu-bo2, LI Rong-biao1 . Occurrence Relationship between Iron Minerals and Clay Minerals in Net-Like Red Soils: Evidence from X-Ray Diffraction. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(04): 1126-1129.
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