【摘要】：為研究衡陽市紅土風(fēng)化強(qiáng)度和原始物質(zhì)來源,對(duì)高興剖面86件樣品進(jìn)行了元素測(cè)試和分析。結(jié)果表明:1)地球化學(xué)參數(shù)CIA、BA值指示,風(fēng)化強(qiáng)度由底部往上呈現(xiàn)減弱趨勢(shì),高興剖面上段(72cm以上)為中等風(fēng)化強(qiáng)度,下段(72cm以下)為強(qiáng)烈化學(xué)風(fēng)化程度。2)元素UCC標(biāo)準(zhǔn)化曲線顯示,元素Na、Ca、Mg、K和Sr表現(xiàn)出不同程度的虧損,AI和Fe為輕度富集,暗示了紅土剖面曾經(jīng)遭受了Na、Ca、Mg、K化學(xué)風(fēng)化。3)A-CN-K風(fēng)化趨勢(shì)圖指示,不同土層在物質(zhì)組成上具有高度均一性,剖面風(fēng)化過程發(fā)展到K元素遷移階段,風(fēng)化作用以伊利石和鉀長(zhǎng)石風(fēng)化為特征;4)常量元素比值顯示,高興剖面紅土與衡山花崗巖風(fēng)化殼元素比值曲線相近似,微量元素La/Co、Th/Cr比值與酸性來源細(xì)粒沉積物比值參數(shù)范圍較吻合,說明了高興剖面紅土可能與花崗巖風(fēng)化殼同源。
[Abstract]:In order to study the weathering strength and original material source of red soil in Hengyang City, 86 samples of happy section were tested and analyzed. The results are as follows: 1) the geochemical parameter CIA, BA indicates that the weathering intensity decreases from bottom to top, and the upper section of happy section (above 72cm) shows moderate weathering strength. The lower part (below 72cm) is strongly chemically weathered. 2) the normalized curve of element UCC shows that elements Na,Ca,Mg,K and Sr show varying degrees of deficit, while AI and Fe are slightly enriched, suggesting that the laterite profile has suffered from Na,Ca,. Mg,K chemical weathering. 3) the A-CN-K weathering trend chart indicates that the material composition of different soil layers is highly homogeneous, and the weathering process in the profile develops to the stage of K element migration, characterized by the weathering of Illite and potash feldspar, which is characterized by the weathering of Illite and potash feldspar. 4) the ratio of major elements shows that the ratio curve of elements between the red soil and the weathering crust of Hengshan granite in the happy section is similar, and the range of the ratio of trace element La/Co,Th/Cr and the ratio of fine sediment from acid source is in good agreement. It is suggested that the red soil in the happy section may be homologous to the weathering crust of granite.
【作者單位】： 衡陽師范學(xué)院城市與旅游學(xué)院;西南大學(xué)地理科學(xué)學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(41471153) 湖南省自然科學(xué)基金項(xiàng)目(2016JJ6015)資助
【分類號(hào)】：S151.1

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