丹巴燕子沟金矿构造控矿特征分析及成矿机制初探
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摘要
丹巴燕子沟金矿床地处我国重要的金矿成矿区-川西地区,已有较长的民采历史。在总结其地质特征的基础上,通过对控矿构造、含矿岩系及成矿作用的研究,认为构造对该地区矿床的形成、富集、产出起着主导作用。矿区构造对金矿体的控制主要有两种类型:一是由脆性断裂控制的石英脉型金矿体;二是由韧性剪切带和滑覆构造所控制的碳质板岩型金矿体。而矿区构造的"断层阀-地震泵吸"成矿机制也是该金矿形成的重要原因。
Yanzigou gold deposit was located in the west Sichuan,which was the important metallogenic province of China,had long history of non-government exploitation.Based on the summarization on the geologic characteristics of gold deposit,through the studies on the ore-controlling factors,on the ore-bearing rock series and metallogenic mechanism,the authors inferred that the structure was the main factor for the formation,enrichment and output of gold deposit.There were two types of ore-controlling structures for gold ore body: one was the quartz vein type controlled by crack propagation;another one was carbonaceous slate type controlled by bedding ductile shear zone and gliding nappe.The "fault valve-Seismic pump" metallogenic mechanism of deposit structure was also the important factor of gold deposit formation.
Yanzigou gold deposit was located in the west Sichuan,which was the important metallogenic province of China,had long history of non-government exploitation.Based on the summarization on the geologic characteristics of gold deposit,through the studies on the ore-controlling factors,on the ore-bearing rock series and metallogenic mechanism,the authors inferred that the structure was the main factor for the formation,enrichment and output of gold deposit.There were two types of ore-controlling structures for gold ore body: one was the quartz vein type controlled by crack propagation;another one was carbonaceous slate type controlled by bedding ductile shear zone and gliding nappe.The "fault valve-Seismic pump" metallogenic mechanism of deposit structure was also the important factor of gold deposit formation.
引文
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[2]许志琴,候立玮,王宗秀,等.中国松潘-甘孜造山带的造山过程[M].地质出版社1,992:9-17.
[3]张欣,汪雄武,肖渊甫,等.四川丹巴燕子沟金矿控矿构造特征分析[J].四川地质学报2,010,30(3):280-283.
[4]四川省地质调查院.1∶25万康定幅区域地质调查报告[R].2003.
[5]贺振,张学仁.山东英格庄金矿床构造控矿特征及深部预测[J].矿床地质,2006(2):175-182.
[6]周春生,张继武,白岩,等.山东灵雀山金矿控矿构造特征及演化模式[J].黄金,2007(3):11-14.
[7]张欣,汪雄武.丹巴燕子沟金矿控矿构造[J].矿物学报,2009(z):587-588.
[8]王全伟,姚书振,梁斌.川西北地区金矿成矿构造动力学探讨[J].地质科技情报,2003,12(4):80-84.
[9]Robert F,Boullier A M,Firdaous K.Gold Quartz Veins in Meta-morphic Terranes and Their Beating on the Role of Fluids in Faul-ting[J].Geophysical Research(B),1995,100:12861-12879.
[10]Sibson R H,Robert F,Poulsen K H.High Angle ReverseFaults,Fluid Pressure Cycling,and Mesothermal Gold QuartzDeposits[J].Geology,1988(16):551-555.
[11]Sibson R H.Fault Structure and Mechanics in Relation to Green-stone Gold Deposits[A].Nuna Conference on Green Stone Goldand Crust Evolution,D,Or[C].1990:54-60.
[12]BoullierAM,RobertF.PaleoseismieEventsRecorded in Arche-an Gold Quartz Vein Networks[J].Struct-Geol,1992(14):161-179.
[13]Cox S F.Faulting Processesat High Fluid Pressures:An Exampleof Fault Valve Behavior form the Wattle Gully Fault,Victoria,Australia[J].Geophysical Research(B),1995,100:13007-
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