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哈图金矿深部构造—地球化学特征及隐伏矿体预测 预览

DEEP STRUCTURAL-GEOCHEMICAL CHARACTERISTICS AND BURIED ORE-BODY PREDICTION IN THE HATU GOLD DEPOSIT
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摘要 对哈图金矿区地表及深处矿体和围岩系统进行取样,通过石英包裹体和氧同位素研究,认为该矿是造山型中—低温混合热液金矿床。含矿断裂产状统计结果显示:浅部含矿构造产状变化范围较大,数量波动明显,岩石以脆性变形为主,在扭应力作用下,形成较多的张裂隙,呈尖灭再现的雁列式分布;深部断裂数量显著减少,产状变化范围缩窄,由于岩石围压增大,脆性变形向塑性转变,张裂隙不发育,石英脉型矿石变成石英细脉+蚀变岩型或蚀变岩型。分析成矿成晕指示元素Hg、Au、Ni、Pb、As、Sb、Cu、W、Zn、Ag、Mo、Bi含量的空间变化发现,地球化学原生晕受含矿构造尖灭再现的影响,存在前缘晕和尾晕的叠加结构,并且已知矿脉群的下部以尾晕元素组合为主,虽有前缘晕元素Sb与As的异常,但规模和强度较小。结合含矿断裂数量和规模向下衰减的特点,推测深部可能仍有隐伏矿体,但规模不大。 Based on the sampling of ore bodies and surrounding rock systems at the surface and deep of the Hatu gold mine,and the study of quartz inclusions and oxygen isotopes,it is believed that the Hatu gold mine is an orogenic type medium-low temperature mixed hydrothermal gold deposit.The statistical results of ore-bearing fractures show that the occurrence and the quantity fluctuation of shallow ore-bearing structures vary widely.The rocks are mainly brittle deformed,and under the action of torsional stress,more tensile fractures are formed,which are distributed in an anechelon pattern.The number of deep faults decreases significantly,and the range of occurrence change narrows.Due to the increase of rock confining pressure,brittle deformation turns to plastic transformation,tensile fractures doesn’t develop,and quartz vein-type ores become quartz fine vein+altered rock type or altered rock type.Through analyzing the spatial changes of the contents of Hg,Au,Ni,Pb,As,Sb,Cu,W,Zn,Ag,Mo and Bi in metallogenic halo,it is found that the geochemical primary halo is affected by the sharp extinction of the ore-bearing structure,and there is the superposition structure of the front and tail halo.In addition,it is known that the lower part of the vein group is mainly a combination of tail halo elements.Although there are anomalies of the front halo elements Sb and As,the scale and intensity are small.Combined with the characteristics of the downward attenuation of the number and scale of ore-bearing faults,it is believed that the deep part may still have hidden ore bodies,but the scale is not large.
作者 地里夏提·买买提 卡衣沙尔·饿热斯 王勇 白玉秀 王俊林 王人可 刘波 林彩香 Dilixiati·MAIMAITI;Kayishaer·ERESI;WANG Yong;BAI Yuxiu;WANG Junlin;WANG Renke;LIU Bo;LIN Caixiang(College of Geology and Mining Engineering,Xinjiang University,Urumqi 830047,Xinjiang,China;West Gold Karamay Hatu Gold Limited Liability Company,Karamay 834000,Xinjiang,China)
出处 《地质力学学报》 CSCD 2019年第1期52-60,共9页 Journal of Geomechanics
基金 国家自然科学基金项目(U1503191).
关键词 哈图金矿 断裂构造 原生晕 地球化学 深部预测 the Hatu gold deposit fault structure primary halo geochemistry buried ore-body prediction
作者简介 地里夏提·买买提(1960-),男,博士,副教授,主要从事矿床学研究和教学工作。E-mail:dilixiati@xju.edu.cn.
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