中文摘要：

Leucogranites 在 SiO ₂ 内容有一个相对狭窄的变化(70.5%75.5%) 。给类似的 SiO ₂ 内容， leucogranites 有相对更高级的艾尔 ₂ O ₃(】13.5%) 和更低的 TFeO + MgO (【2.5%) 正常花岗石比那些满足。这些石油化学的特征建议 leucogranites 从在相对低的温度的部分融化被导出并且没被部分结晶化显著地影响。在现在的学习，我们建议艾尔 ₂ O ₃ 对 SiO ₂ 和 TFeO + MgO 对 SiO ₂ 图能被用来把 leucogranites 与正常花岗石区分开来。另外，我们在 Bengbu 区域从 Jingshan-Tushan-Mayishan 报导侏罗记花岗石的侵入的主要元素作文，东方中央的中国。用艾尔 ₂ 有在矿物学、石油化学的特征的高喜玛拉雅的 leucogranites 的 O ₃ 对 SiO ₂ 和 TFeO + MgO 对 SiO ₂ 图和比较，我们建议 Jingshan-Tushan-Mayishan 侵入属于一条 leucogranite 带。类似于那些高喜玛拉雅的 leucogranites， Bengbu leucogranites 低 Mg ^# 价值，华南的潜水艇 ducted 大陆人外壳的显示他们源于低温度脱水的部分融化在外壳的深度堵住。

英文摘要：

Leucogranites have a relatively narrow variation in SiO2 content （70.5%-75.5%）. Giving similar SiO2 content, leucogranites have relatively higher Al2O3 （〉13.5%） and lower TFeO ＋ MgO （〈2.5%） contents than those of normal granites. These petrochemical characteristics suggest that leucogranites are de- rived from partial melting at relatively low temperature and are not significantly affected by fractional crystallization. In the present study, we propose that the Al2O3 vs SiO2 and TFeO ＋ MgO vs SiO2 dia- grams can be used to distinguish leucogranites from normal granites. In addition, we report the major element compositions of the Jurassic granitic intrusions from Jingshan-Tushan-Mayishan in the Bengbu area, east-central China. Using the Al2O3 vs SiO2 and TFeO ＋ MgO vs SiO2 diagrams and the comparison with the High Himalayan leucogranites in mineralogical and petrochemical characteristics, we suggest that the Jingshan-Tushan-Mayishan intrusions belong to a leucogranite belt. Similar to those of the High Himalayan leucogranites, the Bengbu leucogranites have low Mg# values, indicating that they resulted from low temperature dehydration partial melting of the subducted continental crust of the South China Block at the crustal depth.