摘要
甲玛铜多金属矿四个斑岩岩体中锆石阴极发光形态显示多数为岩浆锆石,少数为热液锆石和继承锆石核。稀土配分型式均呈现重稀土元素相对富集而轻稀土元素相对亏损,少数配分型式分散且轻稀土元素含量较高的为热液锆石。Ti、Ce、(Sm/La)N、Nb/Hf等元素含量及比值范围均位于岩浆区域。所研究的锆石主要为岩浆成因,但受到热液流体作用影响。锆石特征可为判断同类型斑岩矿床的成矿潜力提供理论依据,并指导找矿。
Zircon Cathode Luminescence images of the four major porphyry plutons in Jiama Copper Polymetallie Deposit show that most of them are magmatic origin, and few of them are hydrothermal （altered） zircons and in herited cores. They are characterized by enrichment of HREE and depletion of LREE. A few zircon grains have high LREE contents and diverse REE patterns, which might have been resulted from hydrothermal alteration. Both Ti ＆ Ce contents and （Sm/La）N ＆ Nb/Hf ratios fall in the domain of magmatic zircons. Most zircons from four porphyry plutons in Jiama Deposit are magmatic origin, but a few of them were altered by hydrothermal fluids. The characteristic of zircon can provide theory basis for judging the same type porphyry deposit metallogenic potential, and which can also guide the ore-prospecting work.
出处
《有色金属（矿山部分）》
2012年第5期58-63,共6页
NONFERROUS METALS(Mining Section）
基金
中央公益性行业科研专项"西藏甲玛斑岩铜多金属矿科学基地研究"(200911007-02)
关键词
岩浆锆石
热液锆石
继承锆石核
指导找矿
magmatic zircon
hydrothermal （altered） zircon
inherited zircon cores guidance for ore exploration
