| 刘成东.粤北诸广矿区碱交代岩岩石化学和矿物化学特征及其与铀成矿关系[J].地质与勘探,2010,46(1):33-40 |
| 粤北诸广矿区碱交代岩岩石化学和矿物化学特征及其与铀成矿关系 |
| The Rock and Mineral Chemical Characteristics of Alkaline Rocks in Zhuguang Mining Area ofNorthern Guangdong and its Relationship with Uranium Mineralization |
| 投稿时间：2009-09-10 修订日期：2009-11-12 |
| DOI： |
| 中文关键词: 碱交代岩 岩石化学 矿物化学 铀成矿作用 诸广矿区 |
| 英文关键词: alkali metasomatic rock, petrochemistry, mineral chemistry, uranium mineralization, Zhuguang mining area |
| 基金项目:2009 江西省教育厅科学技术研究项目“南昌市环境地球化学特征研究冶资助(项目编号:GJJ08512) |
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| 中文摘要: |
| [摘要]诸广矿区与铀矿化关系密切的碱交代作用广泛发育,碱交代岩与围岩( 正常花岗岩) 对比,Na2 O、K2 O 明显增高,Al2 O3 、Fe2 O3 也增高;SiO2 明显降低,FeO、MgO、CaO 也降低,表明K2 O 和Na2 O被带入。矿物化学成分分析得出诸广碱交代岩的长石主要为钠长石与钾长石;绿泥石主要属铁镁绿泥石和蠕绿泥石;黄铁矿有的含铀量较高,据Fe/ S 值属硫亏损型,据S/ Se 值属岩浆热液矿床范畴;云母属白云母及少量铁白云母;铀矿物和含铀矿物的UO2 含量以沥青铀矿较高,钍石较低,铀矿石的蚀变矿物
和造岩矿物有的也含微量铀。碱交代作用既释放矿质又为矿质沉淀创造空间,碱交代岩既提供铀源又是一种有利的成矿围岩。 |
| 英文摘要: |
| Abstract:The alkali metasomatism which is close to uranium mineralization is pervasive developed in Zhuguang mining area To contrast with the
wall rock (normal granite), the contents of Na2 O,K2 O,Al2 O3 and Fe2 O3 of alkali metasomatic rocks are higher, and the SiO2 , FeO,MgO and CaO are
decreased The feldspar of Zhuguang alkali metasomatic rocks are mainly albite feldspar and potassium feldspar by the analysis of mineral chemical compo
sition The chlorite is mainly brunsvigite and prochlorite Some pyrite contains high level of uranium According to the value of Fe / S ,it is lack of sulfur,and according to the value of S / Se,it belongs to the magmatic hydrothermal deposits The mica belongs to muscovite and a small amount of ferrimuscovite, and its uranium content is positively correlated with the Na2 O, negative correlation with K2 O,TiO2 and Fe/ FeO+MgO The content of UO2 in uranium minerals and uranium-bearing mineral, pitchblende is high, thorite is low Some of the altered minerals and rock-forming minerals of Uranium ore also contain trace amounts of uranium Alkali metasomatism is not only benefit to release the ores but also benefit to deposit the minerals, therefore the alkalimetasomatism rock is not only an important source of uranium but also favorable ore-forming rock |
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