| 矾山磷铁矿床稀土元素地球化学特征 |
| |
| 引用本文： | 程春.矾山磷铁矿床稀土元素地球化学特征[J].化工矿产地质,2001,23(2):104-108. |
| |
| 作者姓名： | 程春 |
| |
| 作者单位： | 河北省矾山磷矿, |
| |
| 摘 要： | 矾山磷铁矿床赋存于矾山杂岩体内 ,呈层状产出 ,是由深源富钾铁镁质岩浆演化而形成的晚期矿床。矾山杂岩体由三期侵入岩和脉岩组成 ,矿床产于第一期侵入岩中。第一期侵入岩较其它期次侵入岩REE含量高 ,按辉石岩—黑云母辉石岩—磷灰石岩的顺序增加。矿床稀土元素地球化学特征及主要元素含量表明 :在岩桨演化晚期 ,在贫硅和缺少足够“Ca2 +”的条件下 ,稀土元素极易代替“Ca2 +”而进入磷灰石晶格形成补尝类质同象。这对于研究矿床形成的物理化学环境和岩桨的演化具有重要意义。
|
| 关 键 词： | 杂岩体 REE K/Na LREE/HREE La/Yb 贫硅 补尝类质同象 |
| 修稿时间： | 2001年2月8日 |
GEOCHEMICAL CHARACTERISTICS OF RARE EARTH ELEMENTS OF FANSHAN BARRINGERITE DEPOSIT |
| |
| Cheng Chun.GEOCHEMICAL CHARACTERISTICS OF RARE EARTH ELEMENTS OF FANSHAN BARRINGERITE DEPOSIT[J].Geology of Chemical Minerals,2001,23(2):104-108. |
| |
| Authors: | Cheng Chun |
| |
| Abstract: | Fanshan barringerite deposit is hosted within the Fanshan complex, occurring as being bedded, and has a genetic link with late-stage evolution of a deep-source, K-, Fe- and Mg-rich magma. The Fanshan complex is made up of three phases of intrusive and dike rocks of which the first phase of intrusive rock developed the deposit, perhaps owing to more REE volume than the other phases. REE distribution in the first phase intrusive rock descends in an order of pyroxenite to biotite pyroxenite to apatite rock. Judging from REE geochemical characteristics and contents, magmatic evolution, going through the late phase, might create a Si-poor and Ca2+-short environment, such favorable to REE that it could easily replace the Ca2+ to enter the cells of apatite or to lead to a so-called compensative isomorphism. This argument has some important inspiration to studying physical and chemical conditions and magmatic evolution when the deposit was forming. . |
| |
| Keywords: | complex REE K/Na LREE/HREE La/Yb Si-poorness compensative isomohphism |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
