摘要
通过对浙西开化桐村岩体野外剖面采样和地球化学研究,判断桐村岩体应属过铝质高钾钙碱系列花岗斑岩,通过稳定的稀土元素和微量元素来确定岩体的类型等特征。稀土配分模式与同熔型花岗斑岩(Ⅰ型)一致,微量元素分布模式的特点是大离子亲石元素明显富集,具有明显Ta、Nb、P、Ti负异常,类似于"岛弧"环境的岩石特征,与斑岩型矿床母岩相比,不具有良好的找矿潜力。
Through the field sampling and geochemical studies on Tongcun rock mass of Kaihua in Western Zhejiang, it is determined that Tongcun rock mass belongs to the granite porphyry of aluminous high-K calc-alkali series. Through the stable REE and trace elements, the types of rock mass and other features are determined. REE ＇s distribution patterns are consistent with that of the same granite porphyry （I-type）. The distribution of trace elements has a characteristics of large ion lithophile element enrichment, showing significant Ta, Nb, P, Ti negative anomalies, which are similar to the rocks under the environment of ＂island arc＂. Compared with the bedrocks of porphyry deposit, it has not a good ore-prospecting poten- tial.
出处
《金属矿山》
CAS
北大核心
2011年第3期108-111,共4页
Metal Mine
关键词
地球化学
I型花岗岩
桐村花岗斑岩
Geochemistry, I-type granites, Tongcun granite porphyry
