论文部分内容阅读
华南和世界其他国家典型 L i- F花岗岩 195个微量元素分析结果的研究表明 ,随 L i- F花岗岩自下而上不同岩相变化 :Zr/Hf- F、Nb/Ta- F等有负相关变化 ;同样 ,随 F增加 ,Ta(Nb)、Sn、W、Al升高和 Nb/Ta(Zr/Hf)降低 ;在 K/Rb- Rb图中黄英岩成分点位于相关斜线左下方 ;在 K- L i图中有低 L i、K的异常变化 ;在 Rb/Sr- P2 O5 图中有 Rb/Sr的二～三个数量级异常变化等 ,均是 L i- F花岗岩气液分馏为主液态分离的标志。相邻岩相 (香花岭岩和翁岗岩 )的微量元素和主要元素有突变和不均一特点 ,香花岭岩比翁岗岩富主要元素 F、K、Fe、Mn、Mg(或 Ca)和微量元素 Rb(或 Cs)、Zr(或 Hf)、Nb(或 Ta)、Th、W、Sn(或 Mo)、Ba(或 Sr)等。因而富 F、K、Fe与贫 Si、Na的香花岭岩和贫 F、K、Fe与富 Si、Na的翁岗岩属成分共轭和突变的岩性对 ,应为 L i- F花岗岩不混溶为主液态分离标志
The results of the analysis of 195 trace elements in the typical L i-F granites in South China and other countries show that there are negative correlations between lithofacies and L i-F granites from bottom to top: Zr / Hf-F and Nb / Ta-F In the same way, with the increase of F, Ta (Nb), Sn, W and Al increase and Nb / Ta (Zr / Hf) decrease. There is anomalous variation of L i and K in K-L i, and two or three orders of magnitude anomalous variation of Rb / Sr in Rb / Sr-P 2 O 5 are L i-F granite gas-liquid fractionation The main symbol of liquid separation. The trace elements and major elements of the adjacent lithofacies (Xianghualing and Wengang rocks) have abrupt and inhomogeneous characteristics. The major elements F, K, Fe, Mn, Mg (or Ca) and trace elements Elements Rb (or Cs), Zr (or Hf), Nb (or Ta), Th, W, Sn (or Mo), Ba (or Sr) and the like. Therefore, the richness of F, K, Fe and Xianghualing rock that are poor in Si and Na, and the Wengang rock that is poor in F, K, Fe and rich in Si and Na are component conjugate and abrupt lithologies that should be L i-F granites Mainly immiscible liquid separation signs