铜陵矿集区浅层含矿岩浆输运网络与运移机制
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摘要
研究证实铜陵矿集区燕山期岩浆浅表侵入导致了大规模成矿作用,成矿期区域中部-10km处存在一个隐伏岩浆房,成矿岩浆由此处产生并向上运移,然浅层成矿岩浆输运网络与运移机制这个与成矿作用密切相关问题的探索仍有待深入.构造力学、分形统计和地质事实综合分析表明北东向高角度褶皱相关断层及棋盘格状基底断裂系是岩浆由浅层岩浆房向盖层褶皱系输运的主要通道,褶皱核部的虚脱部位是岩浆主要就位空间.因而,上褶-下断的构造网络为浅层岩浆的导流-定位系统.多层结构地质体在变形过程中,上部地层受下部地层顶托更趋于发生褶皱,下部地层承受上部地层的载荷易发生断裂,当下部地层岩石力学强度高于上部时,上褶-下断构造组合的发育概率会更为增加.由于存在导流网络,浅部岩浆房顶部的富含挥发份岩浆以“岩脉式”快速向表层输运,定位于褶皱虚脱空间中,并快速充填和改造就位空间;岩浆顶部的挥发份物质因压力骤降而发生隐爆,引发多相流体不混溶以及大量成矿元素富集.脉动式岩脉活动可能是导致铜陵矿集区岩浆岩化学成分互有差异且时空上紧密伴生的主要因素.
引文
1)常印佛,裴荣富,侯增谦,等.国土资源部“十五”专项研究《大型矿集区地壳深部结构与成矿信息》报告,2003
1Zhao Y M,Zhang Y N.BICS.Geology of gold bearing skarn de-posits in the middle and lower Yangtze River Valley and adjacent regions.Ore Geology Reviews,1999,14(3-4):227~249
2Pan Y M,Dong P.The lower Changjiang(Yangzi/YangtzeRiver)metallogenic belt,east central China:Intrusion and wallrock hosted Cu,Fe Au,Mo,Zn,Pb,Ag deposits.Ore Geology Re-views,1999,15(4):177~242
3周涛发,岳书仓,袁峰,等.长江中下游两个系列铜、金矿床及其成矿流体系统的氢、氧、硫、铅同位素研究.中国科学,D辑,2000,30(增刊):122~128
4华仁民,毛景文.试论中国东部中生代成矿大爆发.矿床地质,1999,18(4):300~307
5Wu C L,Wang Z H,Qiao D W,et al.Types of enclaves and their features and origins in intermediate-acid intrusive rocks from the Tongling district,Anhui Province.China Acta Geologica Sinica,2000,74(1):56~67
6Wu C L,Wang F S,Hao M Y,et al.Geochronology of intermedi-ate–acid intrusive rocks from Tongling,Anhui.Continental Dy-namics,2000,5(1):15~23
7王强,许继峰,赵振华,等.安徽铜陵地区燕山期侵入岩的成因及其对深部动力学过程的约束.中国科学,D辑,2003,33(4):323~334
8Du Y S.Petrological and mineralogical study of enclaves inclu-sions in the typical mining districts of Tongling,Anhui and its bearing on the process of magmatism and metallogeny.ChineseJournal of Geochemistry,1999,18(3):208~218
9毛景文,张作衡,余金杰,等.华北中生代大规模成矿的地球动力学背景:从金属矿床年龄精测得到启示.中国科学,D辑,2003,33(4):289~300
10毛景文,Holly Stein,杜安道,等.长江中下游地区铜金(钼)矿Re-Os年龄测定及其对成矿作用的指示.地质学报,2004,78(1):121~131
11肖建新,顾连兴,倪培,等.安徽铜陵狮子山铜金矿床流体多次沸腾及其与成矿的关系.中国科学,D辑,2002,32(3):199~206
12吴言昌,邵桂清,吴炼.岩浆矽卡岩及其矿床.安徽地质,1996,(2):30~39
13Deng J,Huang D H,Wang Q F,et al.The Formation Mechanism of the“Drag Depressions”and the Irregular Boundaries in Intra-plate Deformation.Acta Geologica Sinica,2004,78(1):267~272
14邓军,黄定华,王庆飞,等.铜陵矿集区印支-燕山期盖层形变场三维结构的实验重塑.中国科学,D辑,2004,34(3):993~1001
15吴淦国,张达,臧文拴.铜陵矿集区构造滑脱与分层成矿特征研究.中国科学,D辑,2003,33(4):300~308
16吕庆田,侯增谦,赵金花,等.深地震反射剖面揭示铜陵矿集区复杂地壳结构形态.中国科学,D辑,2003,33(5):442~449
17吕庆田,侯增谦,杨竹森,等.长江中下游地区的底侵作用及动力学演化模式:来自地球物理资料的约束.中国科学,D辑,2004,34(9):783~794.
18吴言昌,曹奋扬,常印佛.初论安徽沿江地区成矿系统的深部构造-岩浆控制.地学前缘,1999,6(2):285~296
19Deng J,Huang D H,Wang Q F,et al.Surplus space method:A new numerical model for prediction of shallow concealed mag-matic bodies.Acta Geologica Sinica,2004,78(6):358~367
20Agust G,Laura B M,Joan M.Injection and arrest of dykes:im-plications for volcanic hazards.Journal of Volcanology and Geo-thermal Research,1999,88:1~13
21Roberto F W.Mesoscale pervasive felsic magma migration:alter-natives to dyking.Lithos,1999,46:393~410
22Sibson R H.Structural permeability of fluid-driven fault-fracture meshes.Journal of Structural Geology,1996,18(8):1031~1042
23翟裕生,姚书振,林新多,等.长江中下游地区铁铜(金)成矿规律.北京:地质出版社.1992.1~235
24Zhai Y S,Xiong Y Y,Yao S Z,et al.Metallogeny of copper and iron deposits in the Eastern Yangtze Craton,east-central China.Ore Geology Review,1996,11:229~248
25王庆飞,邓军,侯增谦,等.铜陵矿集区成矿作用研究进展.矿床地质,2002,21(增刊):480~483
26常印佛,刘湘培,吴言昌.长江中下游铜铁成矿带.北京:地质出版社,1991.1~379
27Deng J,Fang Y,Yang L Q,et al.Numerical modelling of ore-forming dynamics of fractal dispersive fluid systems.Acta Ge-ologica Sinica,2001,75(2):220~232
28Paul M.Fractal,Scaling and Growth Far from Equilibrium,Lon-don:Cambridge University Press,2000.1~674
29万天丰,Teyssier C,曾庆霖,等.山东玲珑花岗质岩体侵位机制.中国科学,D辑,2000,30(4):337~344
30黄定华,张国胜.鄂东南地区印支-燕山期区域构造变形的实验研究与动力学分析.矿床地质,1994,13(4):299~306
31Paul M,Stephen T.The growth of dykes from magma chambers,Journal of Volcanology and Geothermal Research,1999,92:231~245
32孟良义.长江中、下游铜矿床的成矿模式.中国科学,D辑,1996,26(1):21~25
33邓军,王庆飞,黄定华.成矿流体运输物理机制研究的关键难题与方法体系.地球科学进展,2004,19(3):393~398
1Zhao Y M,Zhang Y N.BICS.Geology of gold bearing skarn de-posits in the middle and lower Yangtze River Valley and adjacent regions.Ore Geology Reviews,1999,14(3-4):227~249
2Pan Y M,Dong P.The lower Changjiang(Yangzi/YangtzeRiver)metallogenic belt,east central China:Intrusion and wallrock hosted Cu,Fe Au,Mo,Zn,Pb,Ag deposits.Ore Geology Re-views,1999,15(4):177~242
3周涛发,岳书仓,袁峰,等.长江中下游两个系列铜、金矿床及其成矿流体系统的氢、氧、硫、铅同位素研究.中国科学,D辑,2000,30(增刊):122~128
4华仁民,毛景文.试论中国东部中生代成矿大爆发.矿床地质,1999,18(4):300~307
5Wu C L,Wang Z H,Qiao D W,et al.Types of enclaves and their features and origins in intermediate-acid intrusive rocks from the Tongling district,Anhui Province.China Acta Geologica Sinica,2000,74(1):56~67
6Wu C L,Wang F S,Hao M Y,et al.Geochronology of intermedi-ate–acid intrusive rocks from Tongling,Anhui.Continental Dy-namics,2000,5(1):15~23
7王强,许继峰,赵振华,等.安徽铜陵地区燕山期侵入岩的成因及其对深部动力学过程的约束.中国科学,D辑,2003,33(4):323~334
8Du Y S.Petrological and mineralogical study of enclaves inclu-sions in the typical mining districts of Tongling,Anhui and its bearing on the process of magmatism and metallogeny.ChineseJournal of Geochemistry,1999,18(3):208~218
9毛景文,张作衡,余金杰,等.华北中生代大规模成矿的地球动力学背景:从金属矿床年龄精测得到启示.中国科学,D辑,2003,33(4):289~300
10毛景文,Holly Stein,杜安道,等.长江中下游地区铜金(钼)矿Re-Os年龄测定及其对成矿作用的指示.地质学报,2004,78(1):121~131
11肖建新,顾连兴,倪培,等.安徽铜陵狮子山铜金矿床流体多次沸腾及其与成矿的关系.中国科学,D辑,2002,32(3):199~206
12吴言昌,邵桂清,吴炼.岩浆矽卡岩及其矿床.安徽地质,1996,(2):30~39
13Deng J,Huang D H,Wang Q F,et al.The Formation Mechanism of the“Drag Depressions”and the Irregular Boundaries in Intra-plate Deformation.Acta Geologica Sinica,2004,78(1):267~272
14邓军,黄定华,王庆飞,等.铜陵矿集区印支-燕山期盖层形变场三维结构的实验重塑.中国科学,D辑,2004,34(3):993~1001
15吴淦国,张达,臧文拴.铜陵矿集区构造滑脱与分层成矿特征研究.中国科学,D辑,2003,33(4):300~308
16吕庆田,侯增谦,赵金花,等.深地震反射剖面揭示铜陵矿集区复杂地壳结构形态.中国科学,D辑,2003,33(5):442~449
17吕庆田,侯增谦,杨竹森,等.长江中下游地区的底侵作用及动力学演化模式:来自地球物理资料的约束.中国科学,D辑,2004,34(9):783~794.
18吴言昌,曹奋扬,常印佛.初论安徽沿江地区成矿系统的深部构造-岩浆控制.地学前缘,1999,6(2):285~296
19Deng J,Huang D H,Wang Q F,et al.Surplus space method:A new numerical model for prediction of shallow concealed mag-matic bodies.Acta Geologica Sinica,2004,78(6):358~367
20Agust G,Laura B M,Joan M.Injection and arrest of dykes:im-plications for volcanic hazards.Journal of Volcanology and Geo-thermal Research,1999,88:1~13
21Roberto F W.Mesoscale pervasive felsic magma migration:alter-natives to dyking.Lithos,1999,46:393~410
22Sibson R H.Structural permeability of fluid-driven fault-fracture meshes.Journal of Structural Geology,1996,18(8):1031~1042
23翟裕生,姚书振,林新多,等.长江中下游地区铁铜(金)成矿规律.北京:地质出版社.1992.1~235
24Zhai Y S,Xiong Y Y,Yao S Z,et al.Metallogeny of copper and iron deposits in the Eastern Yangtze Craton,east-central China.Ore Geology Review,1996,11:229~248
25王庆飞,邓军,侯增谦,等.铜陵矿集区成矿作用研究进展.矿床地质,2002,21(增刊):480~483
26常印佛,刘湘培,吴言昌.长江中下游铜铁成矿带.北京:地质出版社,1991.1~379
27Deng J,Fang Y,Yang L Q,et al.Numerical modelling of ore-forming dynamics of fractal dispersive fluid systems.Acta Ge-ologica Sinica,2001,75(2):220~232
28Paul M.Fractal,Scaling and Growth Far from Equilibrium,Lon-don:Cambridge University Press,2000.1~674
29万天丰,Teyssier C,曾庆霖,等.山东玲珑花岗质岩体侵位机制.中国科学,D辑,2000,30(4):337~344
30黄定华,张国胜.鄂东南地区印支-燕山期区域构造变形的实验研究与动力学分析.矿床地质,1994,13(4):299~306
31Paul M,Stephen T.The growth of dykes from magma chambers,Journal of Volcanology and Geothermal Research,1999,92:231~245
32孟良义.长江中、下游铜矿床的成矿模式.中国科学,D辑,1996,26(1):21~25
33邓军,王庆飞,黄定华.成矿流体运输物理机制研究的关键难题与方法体系.地球科学进展,2004,19(3):393~398
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