Geochemical Characteristics and Behaviors of Rare Earth Elements in Process of Vertisol Development
来源期刊：JOURNAL OF RARE EARTHS2004年第4期
论文作者：王成善 黄成敏
Key words：ecology; vertisol; secondary nodules; geochemistry; rare earths;
Abstract: Vertisol developed on argillaceous rocks has its special pedogenic processes and properties, and formed some secondary nodules. In study area, contents of rare earth elements (REE) are significantly different in different sedimentary rocks due to varied contents of clay fraction and clay mineral composition, etc. Under the dry and hot climate, REEs were less differentiated than their parent sedimentary rocks. However, REEs in secondary nodules formed in pedogenic process display their specific behaviors. They are more concentrated in iron concretions, the content of heavy REEs increases relatively, and positive Ce-anomaly appeares. But, negative Ce-anomaly was found in calcium concretions, while normal Ce content in parent rocks and vertisol.
王成善1，黄成敏2
(1.Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu 610059,China;
2.School of Environmental Sciences & Engineering,Sichuan University,Chengdu 610065,China)
Abstract:Vertisol developed on argillaceous rocks has its special pedogenic processes and properties, and formed some secondary nodules. In study area, contents of rare earth elements (REE) are significantly different in different sedimentary rocks due to varied contents of clay fraction and clay mineral composition, etc. Under the dry and hot climate, REEs were less differentiated than their parent sedimentary rocks. However, REEs in secondary nodules formed in pedogenic process display their specific behaviors. They are more concentrated in iron concretions, the content of heavy REEs increases relatively, and positive Ce-anomaly appeares. But, negative Ce-anomaly was found in calcium concretions, while normal Ce content in parent rocks and vertisol.
Key words:ecology; vertisol; secondary nodules; geochemistry; rare earths;
【全文内容正在添加中】
