摘要
会泽铅锌矿是川滇黔铅锌多金属成矿区的超大型矿床之一。以该矿床铅锌成矿系统研究为主线,结合近些年来前人的主要研究成果,深入分析了印支期造山背景对铅锌多金属成矿系统的控制作用,着重讨论了成矿构造体系与成矿系统的成生联系。研究表明,受印支期(成矿期)碰撞造山背景约束,该区发生了斜冲走滑构造作用,形成NE构造带成矿构造体系,为铅锌成矿系统提供了流体"运"移和"储"存条件,构造驱动成矿流体沿会泽矿山厂、麒麟厂断褶带发生大规模"运"移,并与盖层中碳酸盐岩发生水-岩相互作用。深部流体与盆地流体混合、流体不混溶等构造-流体多重耦合作用,使流体物理化学条件改变,导致富矿流体沿三条NE向主断裂上盘背斜的层间压扭性断裂带卸载沉淀,形成NE向延伸、SE倾斜、SW向侧伏延深的雁列式柱状矿体。研究认为,斜冲走滑构造作用形成的成矿构造体系是制约该矿床"大(矿床、矿体规模大)、深(矿体延深大)、强(热液蚀变强)、带(矿物组合分带明显)"特征的主要原因,"多(共伴生元素多)"与成矿流体迁移-聚沉过程中所经过岩石的性质有关。该研究对川滇黔成矿区乃至同类矿床研究和深部勘查具有重要的理论意义和实际意义。
The super-large Huize lead-zinc deposit is located in the Sichuan-Yunnan-Guizhou Triangle area(SYGT).This paper considers the theory of metallogenic system"source,transport,storage,transformation and preservation"as the main line of research,analyzes the control effect of orogenic background on lead-zinc metallogenic system,and discusses the relationship between metallogenic tectonic system and metallogenic system,and collects the main achievements and progress of previous researches in recent years.The study shows that,constrained by the Indosinian orogenic background,oblique thrust tectonics occurred in the area,forming the metallotectonic system of the NE tectonic belt,which provided the"transport"and"storage"conditions for the lead-zinc metallogenic system.The tectonic-driven ore-forming fluid migrated in large scale along the Kuangshanchang and Qilinchang fault-fold belt.Subsequently,water-rock interaction of the ore-forming fluid occurred with the carbonate rocks in the cover.Similar structural fluid multiple coupling actions included deep fluid mixing with basin fluid,fluid immiscibilityetal,which changes the physical and chemical conditions of the ore-forming fluid.This resulted in the unloading and precipitation of ore-forming fluid along the interbedded compresso wrench fault,forming the ore body trending NE,striking SE and pitching SW.Studies suggest that compresso wrench fault is the key factor controlling the ore deposit"rich(high grade),large(reserve),deep(extended depth),strong(alteration),high(temperature)and zone(good zonation)"characteristics,and"many(associated elements)"is related to the properties of rocks passed by ore-forming fluids during their migration.This study has important theoretical significance and guiding function for deep exploration of similar deposits.
作者
王明志
韩润生
张艳
WANG Mingzhi;HAN Runsheng;ZHANG YAN(Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming,650093;Southwest Geological Survey,Geological Survey Center for Non-ferrous Mineral Resources,Kunming,650093)
出处
《地质学报》
EI
CAS
CSCD
北大核心
2020年第10期3008-3023,共16页
Acta Geologica Sinica
基金
国家自然科学基金(编号41572060,41802089)
云岭学者资助项目(2014)
云南省矿产资源预测评价工程实验室(2010)资助的成果。
关键词
印支期造山成矿背景
成矿构造体系
成矿系统
会泽铅锌矿床
川滇黔成矿区
Indosinian orogenic mineralization
metallotectonic system
metallogenic system
Huize lead-zinc deposit
Sichuan Yunnanguizhou mining areas
