研究了苏皖四处凹凸棒石粘土矿床不同类型矿石的稀土元素组成及其变化特征. 研究表明玄武岩首先风化形成蒙皂石族粘土矿物, 在此过程中稀土元素没有明显的分馏作用, 强风化的玄武岩重稀土元素强烈亏损; 如果玄武岩在地表进一步风化形成红土型蒙脱石粘土, 则发生明显的铈正异常, 中稀土亏损而轻稀土和重稀土又重新富集, 这反映了当时大陆地表特殊的氧化条件和盆地湖水溶液的胶体吸附作用. 玄武岩在原地进行水-岩作用, 发生递进化学风化, 其稀土元素地球化学特征与玄武岩及其风化产物的稀土元素地球化学特征基本一致, 总量略低, 显示REE没有大量迁移流失. 沉积型凹凸棒石粘土的稀土元素地球化学特征也与玄武岩及其风化产物的稀土元素地球化学特征相似, 但同时表现出轻重稀土比值增大, 铕正异常, 表明沉积型凹凸棒石粘土的物源基本上是来源于玄武岩的风化产物, 但REE配分模型受玄武岩风化残积物的制约.
参考文献
| [1] | Assouba H;Shaw H F .The occurrence of palygorskite in Quaternary sediments of the coastal plain of north-west Egypt[J].Clay Minerals,1980,15(01):77. |
| [2] | Chahi A;Duplay J;Lucas J .Analysis of palygorskites and associated clay from the Jbel Rkassoul (Morocco): chemical characteristics and origin formation[J].Clays and Clay Minerals,1993,41(04):401. |
| [3] | Chahi A;Clauer N;Toulkeridir T et al.Rare-earth elements as traces of the genetic relationship between Smeitite and palygorskite in marine phosphorites[J].Clay Minerals,1999,34(03):419. |
| [4] | Colson J;Cojan I;Thiry M .A hydrogeological model for palygorskite formation in the Danian continental facies of the Provence Basin (France)[J].Clay Minerals,1997,33(02):333. |
| [5] | Hasnuddin Siddiqui N K.Occourances of palygorskite in the Deccan Trapformation in India: in palygorskites-sepiolite occourancesgenesis and uses[M].Singer A and Galan E eds ,Developments in sedimentology 37,1984 |
| [6] | Khademi H;Mermut A R .Source of palygorskite in gypsiferous Aridisols and associated sediments from central Iran[J].Clay Minerals,1998,33(04):561. |
| [7] | Paquet H .Stability instability and significance of attapulgite in the calcretes of mediteranean and tropical areas with marked dry season[J].Science Geol Sinica,1983,72:131. |
| [8] | Singer A.Petrogenic palygorskite in the arid environment: in palygorskites-sepiolite occourancesgenesis and uses[A].Elsvier,Amsterdam,1984:169. |
| [9] | 许冀泉 .江苏六合小盘山凹凸棒石粘土的发现及其意义[J].科学通报,1980,25(11):513. |
| [10] | 奚可堂.苏皖沉积型坡缕石的扫描电镜及能谱分析研究[J].矿物学报,1985(02):175-178,197. |
| [11] | 黄光煦.江苏省盱眙龙山玄武岩特征及其与凹凸棒石粘土的关系[J].建材地质,1988(02):3. |
| [12] | 方邺森 .苏皖地区凹凸棒石粘土[J].南京大学学报(自然科学版),1990,26(01):15. |
| [13] | 郑自立,田煦.苏皖凸凹棒石矿物红外光谱特征研究[J].岩石学报,1990(02):80-86,100. |
| [14] | 郑自立;吴延之;彭省临 .苏皖黄泥山坡缕石粘土矿含矿层微量元素地球化学[J].中南工业大学学报(自然科学版),1998,29(02):107. |
| [15] | 郑自立;宋绵新;易发成.中国坡缕石[M].北京:地质出版社,1997 |
| [16] | 陈正国.黄泥山坡缕石粘土矿床成因研究[J].建材地质,1989(03):3. |
| [17] | 贺玉珉.江苏六合小盘山凹凸棒石粘土矿的物质组成及成因探讨[J].江苏地质,1982(01):13. |
| [18] | 陈道公,彭子成.皖苏若干新生代火山岩的钾氩年龄和铅锶同位素特征[J].岩石学报,1988(02):3-12. |
| [19] | 张培善,陶克捷,杨主明,杨学明,宋仁奎.白云鄂博稀土、铌钽矿物及其成因探讨[J].中国稀土学报,2001(02):97-102. |
| [20] | 支霞臣;陈道公;杨晶 .皖东第三系玄武岩的地球化学特征和成因[J].地质学报,1995,69(02):156. |
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