摘要
基于夏日哈木矿床的钻孔信息特征,通过对矿体及其赋存的镁铁质-超镁铁质杂岩体地质、地球化学特征的研究表明,岩体以亏损Ta、Nb、Ti等高场强元素,富集Rb、Th、U、Sr等大离子亲石元素为特征;矿体沿走向,中部完整厚大,品位较高;沿垂深,Cu、Ni品位不稳定,向深部Ni品位有增高趋势。矿床地质、地球化学特征说明岩浆源自上地幔,其演化过程中发生过分离结晶及同化混染作用。矿床可能为通道相矿床。
Based on the characteristic of drill hole information of the Xiarihamu deposit,geological and geochemical characteristics of ore bodies and their occurrence of mafic and ultra mafic complex rocks were studied. Research shows that rock mass has characteristics of depleted in HFSEs（ Ta,Nb,Ti） and enriched in LILE（ Rb,Th,U and Sr）. Ore bodies along the strike,have characteristics of full and thick middle part,high grade. While along the vertical depth,Cu,Ni grade are not stable,and Ni grade has increased trend to the deep. Geological and geochemical characteristics of the deposit illustrate that the magma is derived from the upper mantle,in which process of evolution,separation crystallization and assimilation happened. The deposit may be a channel facies deposit.
出处
《科学技术与工程》
北大核心
2016年第18期123-128,共6页
Science Technology and Engineering
基金
中国地质调查局地质大调查项目12120111086020)
青海省地质勘查基金项目(青国土资矿[2012]209号)资助
关键词
夏日哈木
铜镍矿床
镁铁质-超镁铁质杂岩体
分离结晶
同化混染
Xiarihamu
copper-nickel deposit
mafic-ultramafic complex
fractional crystallization
assimilate-contamination
