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金属矿山 ›› 2011, Vol. 40 ›› Issue (03): 108-111.

• 地质与测量 • 上一篇    下一篇

浙西开化桐村花岗斑岩地球化学特征及找矿潜力

陈帅奇,余心起,张德会,代堰培,李弘珂,邱俊挺   

  1. 中国地质大学(北京)
  • 出版日期:2011-03-10 发布日期:2011-03-11

Geochemical Characteristics of Kaihua Tongcun Granitic Porphyry In Western Zhejiang and Ore-prospecting Potential

Chen Shuaiqi,Yu Xinqi,Zhang Dehui,Dai Yanpei,Li Hongke,Qiu Junting   

  1. China University of Geosciences(Beijing)
  • Online:2011-03-10 Published:2011-03-11

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。

关键词: 地球化学, I型花岗岩, 桐村花岗斑岩

Abstract: 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 potential.

Key words: Geochemistry, I-type granites, Tongcun granite porphyry