摘要
根据产状、岩石结构与岩石化学等特征,确定里松花岗岩中闪长质包体为异源岩浆岩成因。在此基础上,选择岩体中心、边缘部位的L节理面,统计了它们的密度与粒度等宏观分布特征。结果表明,闪长质包体的产出频率与相对面积分布具有分形特征,即花岗岩-包体体系属于二元流体之间的非线性混合,从而为里松花岗岩的岩浆混合成因提供了新的宏观证据。
Dioritic enclaves of the Lisong Granite in Guangxi Province of China are know to have been originated from different magma sources on the basis of their features like occurrence, texture and petrochemistry.As a result statistical studies of the frequency and distrbution of these enclaves in size were implemented along L fissure planes from its center to periphery of the Lisong Granite. Studies show that the frequency of the occurrence and the relative occupancy in area percentage of the enclaves follow a fractal model. This means that the graniteenclaves system is the product of nonlinear mixture of magmas,being indicative of magma mingling in the formation of the Lisong granite and its dioritic enclaves.
基金
国家自然科学基金(40073008
40132010)
南京大学博士后基金资助
