金属矿山
金屬礦山
금속광산
METAL MINE
2015年
5期
145-148
,共4页
火山岩%隐伏花岗斑岩%成矿岩体%叠加成矿系统
火山巖%隱伏花崗斑巖%成礦巖體%疊加成礦繫統
화산암%은복화강반암%성광암체%첩가성광계통
Volcanic rock%Concealed granite porphyry%Ore-bearing rocks%Superimposed metallogenic system
澜沧老厂矿区广泛分布的火山岩和花岗斑岩被分别作为火山喷流沉积成矿系统和深部斑岩热液成矿系统的主要成矿地质体。对火山岩中的橄榄玄武岩中的钛磁铁矿进行能谱分析，对杏仁状钠粗面质熔岩不同矿物和杏仁状钾质粗面质熔岩微晶钾长石分别进行电子探针分析，并对矿区火山岩年代、岩石学等特征，花岗斑岩年代、成因、源区及围岩蚀变进行全面总结。结果表明：①火山岩成岩时代为早石炭世，是矿区Ag-Pb-Zn矿重要的含矿岩性，矿区火山作用控制着矿床的时空分布，为成矿提供了物质基础以及重要的热源驱动力；②隐伏花岗斑岩为矿区斑岩型钼矿成矿母岩，花岗斑岩的侵入时期属于喜山早期岩浆活动事件；③早石炭世火山作用以及喜山期岩浆活动，为叠加成矿系统的形成提供了非常有利的条件。上述研究成果对于深入探究矿区成矿系统具有一定的参考价值。
瀾滄老廠礦區廣汎分佈的火山巖和花崗斑巖被分彆作為火山噴流沉積成礦繫統和深部斑巖熱液成礦繫統的主要成礦地質體。對火山巖中的橄欖玄武巖中的鈦磁鐵礦進行能譜分析，對杏仁狀鈉粗麵質鎔巖不同礦物和杏仁狀鉀質粗麵質鎔巖微晶鉀長石分彆進行電子探針分析，併對礦區火山巖年代、巖石學等特徵，花崗斑巖年代、成因、源區及圍巖蝕變進行全麵總結。結果錶明：①火山巖成巖時代為早石炭世，是礦區Ag-Pb-Zn礦重要的含礦巖性，礦區火山作用控製著礦床的時空分佈，為成礦提供瞭物質基礎以及重要的熱源驅動力；②隱伏花崗斑巖為礦區斑巖型鉬礦成礦母巖，花崗斑巖的侵入時期屬于喜山早期巖漿活動事件；③早石炭世火山作用以及喜山期巖漿活動，為疊加成礦繫統的形成提供瞭非常有利的條件。上述研究成果對于深入探究礦區成礦繫統具有一定的參攷價值。
란창로엄광구엄범분포적화산암화화강반암피분별작위화산분류침적성광계통화심부반암열액성광계통적주요성광지질체。대화산암중적감람현무암중적태자철광진행능보분석，대행인상납조면질용암불동광물화행인상갑질조면질용암미정갑장석분별진행전자탐침분석，병대광구화산암년대、암석학등특정，화강반암년대、성인、원구급위암식변진행전면총결。결과표명：①화산암성암시대위조석탄세，시광구Ag-Pb-Zn광중요적함광암성，광구화산작용공제착광상적시공분포，위성광제공료물질기출이급중요적열원구동력；②은복화강반암위광구반암형목광성광모암，화강반암적침입시기속우희산조기암장활동사건；③조석탄세화산작용이급희산기암장활동，위첩가성광계통적형성제공료비상유리적조건。상술연구성과대우심입탐구광구성광계통구유일정적삼고개치。
The Volcanic rocks and granite porphyry are widely distributed in Laochang mining area, Lancang county, which are regarded as the main metallogenic geological body of volcanic gush flow depositing metallogenic system and deep por-phyry hydrothermal metallogenic system. The titanium magnetite in the olivine basalt of the volcanic rocks is conducted on spectrum analysis,the different minerals of amygdaloidal sodium trachyte lava and the microcrystaline potassium feldspar of al-mond-shaped potasium trachyte lava are analyzed by electron microprobe respectively. Besides that,the times and petrological characteristics of volcanic rock,the times,cause,source area and wall rock alteration characteristics of granite porphyry in min-ing area are summarized comprehensively. The analysis results show that:①the volcanic diagenetic age is the early carbonifer-ous epoch,and it owns the important ore-bearing lithology of the Ag-Pb-Zn mine in mining area,the space-time distribution of the ore deposit is controlled by the mining volcanism,which provides materials basis and important driving force of heat source for metallogenic activity;②concealed granite porphyry is the porphyry molybdenum ore-forming parent rock in mining area,and the granite porphyry intrusion period belongs to the early himalayan magmatic activity;③the early carboniferous volcanism and magmatism in himalayan period provide favorable conditions for the formation of metallogenic system. The above research re-sults have some certain reference value for analyzing the metallogenic system.
