铜陵矿集区浅表地质结构与深部耦合
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摘要
通过铜陵矿集区浅表地质特征分析,结合深部地球物理探测成果,对区内地壳结构进行了初步研究。提出区内地壳具有多层结构的特征,尤以盖层与基底之间(埋深12km左右)存在拆离构造带是联系浅表与中下地壳的关键界面,界面上盖层构造为一自北西向南东逆冲断褶带,界面下基底运动方向与盖层运动方向相反;拆离构造带为上部"岩浆房"聚积位置,深部岩浆房在壳幔边界;区内浅表与盖层内断裂、褶皱系统与深部拆离构造带等构成了区内岩浆-流体成矿系统,浅表分布的矿床、矿田是燕山期岩浆-流体成矿系统的表征。
Based on analysis of shallow geological characteristics of the Tongling ore concentration area and results of deep geophysical exploration, crustal structure in the area was preliminarily studied. It is proposed that the crust in the area is characterized by a multi-layer structure, especially that a detachment tectonic belt existing between the cover and the basement(buried depth of about 12 km) is a key interface that connects the shallow surface to the middle and lower crust. The covering structure above the interface is a zone of bruchfalten thrusting from northwest to southeast, while the basement beneath it moves in the opposite direction of the cover.The detachment zone is an amassing site of the upper "magmatic chamber" and the deep magmatic chamber is at the boundary of crust and mantle. The magma-fluid metallogenic system is composed of faulting and folding systems in the shallow and covering strata, and of the deep detachment. Deposits and ore-fields distributed in the shallow strata are representation of magma-fluid metallogenic system of the Yanshanian period.
Based on analysis of shallow geological characteristics of the Tongling ore concentration area and results of deep geophysical exploration, crustal structure in the area was preliminarily studied. It is proposed that the crust in the area is characterized by a multi-layer structure, especially that a detachment tectonic belt existing between the cover and the basement(buried depth of about 12 km) is a key interface that connects the shallow surface to the middle and lower crust. The covering structure above the interface is a zone of bruchfalten thrusting from northwest to southeast, while the basement beneath it moves in the opposite direction of the cover.The detachment zone is an amassing site of the upper "magmatic chamber" and the deep magmatic chamber is at the boundary of crust and mantle. The magma-fluid metallogenic system is composed of faulting and folding systems in the shallow and covering strata, and of the deep detachment. Deposits and ore-fields distributed in the shallow strata are representation of magma-fluid metallogenic system of the Yanshanian period.
引文
[1]常印佛,刘湘培,吴言昌.长江中下游铁铜成矿带[M].北京:地质出版社,1991:1~379.
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[4]陈江峰,周泰禧,李学明,等.安徽南部燕山期中酸性侵入岩的源区锶、钕同位素制约[J].地球化学,1993,(3):261~281.
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[6]邓晋福,吴宗絮.下扬子克拉通岩石圈减薄事件与长江中下游Cu-Fe成矿带[J].安徽地质,2001,11(2):86~91.
[7]邓晋福,戴圣潜,赵海玲,等.铜陵Cu-Au(Ag)成矿区岩浆-流体-成矿系统和亚系统的识别[J].矿床地质,2002,21(4):317~322.
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[12]董树文,马立成,刘刚,等.论长江中下游成矿动力学[J].地质学报,2011,85(5):612~625.
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[14]杜旭东,漆家福,张一伟,等.中国东部晚侏罗-早白垩纪盆地火山岩系的确认及成盆构造背景分析[J].石油大学学报(自然科学版),2000,24(1):1~5.
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[16]杜杨松,李铉具.安徽铜陵岩浆岩中辉长质岩石包体的发现及其地质意义[J].高校地质学报,2004,10(3):332~342.
[17]杜杨松,李顺庭,曹毅,等.安徽铜陵铜官山矿区中生代侵入岩的形成过程岩浆底侵、同化混染和分离结晶[J].现代地质,2007,21(1):71~77.
[18]杜杨松,秦新龙,曹毅.安徽铜陵中生代侵入岩及其岩石包体中的硫化物氧化物包裹体研究[J].矿床地质,2010,29(1):71~84.
[19]高庚,徐兆文,杨小男,等.安徽铜陵白芒山辉石闪长岩体的成因:Sr、Nd、Pb、O同位素制约[J].南京大学学报(自然科学版),2006,42(3):269~279.
[20]李曙光.长江中下游中生代岩浆岩及铜铁成矿带的深部构造背景[J].安徽地质,2001,11(2):118~122.
[21]兰学毅,杜建国,严加永,等.基于先验信息约束的重磁三维交互反演建模技术-以铜陵矿集区为例[J].地球物理学报,2015,58(12):4436~4449.
[22]吕庆田,侯增谦,赵金花,等.深地震反射剖面揭示的铜陵矿集区复杂地壳结构形态[J].中国科学(D辑),2003,33(5):442~449.
[23]吴才来,周珣若,黄许陈,等.铜陵地区中酸性侵入岩年代学研究[J].岩石矿物学杂志,1996,15(4):299~307.
[24]吕庆田,史大年,汤井田,等.长江中下游成矿带及典型矿集区深部结构探测-SinoProbe-03年度进展综述[J].地球学报,2011,32(3):257~268.
[25]吕庆田,董树文,史大年,等.长江中下游成矿带岩石圈结构与成矿动力学模型-深部探测(SinoProbe)综述[J].地球学报,2014,30(4):889~906.
[26]吴才来,陈松永,史仁灯,等.铜陵中生代中酸性侵入岩特征及成因[J].地球学报,2003,24(1):41~48.
[27]吴才来,董树文,郭祥焱,等.中国铜陵中酸性侵入岩[M].北京:地质出版社,2013:1~228.
[28]史大年,吕庆田,徐文艺,等.长江中下游成矿带及邻区地壳结构-MASH成矿过程的P波接收函数成像证据[J].地质学报,2012,86(3):389~399.
[29]徐晓春,白茹玉,谢巧勤,等.安徽铜陵中生代侵入岩地质地球化学特征再认识及成因讨论[J].岩石学报,2012,28(10):3139~3169.
[30]周珣若,吴才来,黄许陈,等.铜陵中酸性侵入岩同源包体特征及岩浆动力学[J].岩石矿物学杂志,1993,12(1):20~30.
[2]常印佛,董树文,黄德志.论中-下扬子“一盖多底”格局与演化[J].火山地质与矿产,1996,17(1-2):1~15.
[3]陈江峰.简单混合、AFC混合和花岗岩同位素数据解释[J].安徽地质,1991,1(1):19~27.
[4]陈江峰,周泰禧,李学明,等.安徽南部燕山期中酸性侵入岩的源区锶、钕同位素制约[J].地球化学,1993,(3):261~281.
[5]邓晋福,赵国春,赵海玲,等.中国东部燕山期火成岩构造组合与造山深部过程[J].地质评论,2000,46(1):41~48.
[6]邓晋福,吴宗絮.下扬子克拉通岩石圈减薄事件与长江中下游Cu-Fe成矿带[J].安徽地质,2001,11(2):86~91.
[7]邓晋福,戴圣潜,赵海玲,等.铜陵Cu-Au(Ag)成矿区岩浆-流体-成矿系统和亚系统的识别[J].矿床地质,2002,21(4):317~322.
[8]邓军,黄定华,王庆飞,等.铜陵矿集区印支一燕山期盖层形变场三维结构的实验重塑[J].中国科学(D辑),2004,34(11):993~1001.
[9]狄永军,赵海玲,张贻全,等.安徽铜陵地区燕山期花岗岩类岩石中的岩浆混合结构[J].北京地质,2003,15(1):12~17.
[10]狄永军,赵海玲,吴淦国,等.铜陵地区燕山期侵入岩成因与三端元岩浆混合作用[J].地质论评,2005,51(5):528~538.
[11]董树文.长江中下游铁铜矿带成因之构造分析[J].中国地质科学院院报,1991,23(2):43~56.
[12]董树文,马立成,刘刚,等.论长江中下游成矿动力学[J].地质学报,2011,85(5):612~625.
[13]杜建国,戴圣潜,莫宣学,等.安徽沿江地区燕山期火成岩成岩成矿地质背景[J].地学前缘,2003,10(4):551~560.
[14]杜旭东,漆家福,张一伟,等.中国东部晚侏罗-早白垩纪盆地火山岩系的确认及成盆构造背景分析[J].石油大学学报(自然科学版),2000,24(1):1~5.
[15]杜杨松,李学军.安徽铜陵典型矿区岩石包体研究及其岩浆成矿作用过程探讨[J].高校地质学报,1997,3(2):171~181.
[16]杜杨松,李铉具.安徽铜陵岩浆岩中辉长质岩石包体的发现及其地质意义[J].高校地质学报,2004,10(3):332~342.
[17]杜杨松,李顺庭,曹毅,等.安徽铜陵铜官山矿区中生代侵入岩的形成过程岩浆底侵、同化混染和分离结晶[J].现代地质,2007,21(1):71~77.
[18]杜杨松,秦新龙,曹毅.安徽铜陵中生代侵入岩及其岩石包体中的硫化物氧化物包裹体研究[J].矿床地质,2010,29(1):71~84.
[19]高庚,徐兆文,杨小男,等.安徽铜陵白芒山辉石闪长岩体的成因:Sr、Nd、Pb、O同位素制约[J].南京大学学报(自然科学版),2006,42(3):269~279.
[20]李曙光.长江中下游中生代岩浆岩及铜铁成矿带的深部构造背景[J].安徽地质,2001,11(2):118~122.
[21]兰学毅,杜建国,严加永,等.基于先验信息约束的重磁三维交互反演建模技术-以铜陵矿集区为例[J].地球物理学报,2015,58(12):4436~4449.
[22]吕庆田,侯增谦,赵金花,等.深地震反射剖面揭示的铜陵矿集区复杂地壳结构形态[J].中国科学(D辑),2003,33(5):442~449.
[23]吴才来,周珣若,黄许陈,等.铜陵地区中酸性侵入岩年代学研究[J].岩石矿物学杂志,1996,15(4):299~307.
[24]吕庆田,史大年,汤井田,等.长江中下游成矿带及典型矿集区深部结构探测-SinoProbe-03年度进展综述[J].地球学报,2011,32(3):257~268.
[25]吕庆田,董树文,史大年,等.长江中下游成矿带岩石圈结构与成矿动力学模型-深部探测(SinoProbe)综述[J].地球学报,2014,30(4):889~906.
[26]吴才来,陈松永,史仁灯,等.铜陵中生代中酸性侵入岩特征及成因[J].地球学报,2003,24(1):41~48.
[27]吴才来,董树文,郭祥焱,等.中国铜陵中酸性侵入岩[M].北京:地质出版社,2013:1~228.
[28]史大年,吕庆田,徐文艺,等.长江中下游成矿带及邻区地壳结构-MASH成矿过程的P波接收函数成像证据[J].地质学报,2012,86(3):389~399.
[29]徐晓春,白茹玉,谢巧勤,等.安徽铜陵中生代侵入岩地质地球化学特征再认识及成因讨论[J].岩石学报,2012,28(10):3139~3169.
[30]周珣若,吴才来,黄许陈,等.铜陵中酸性侵入岩同源包体特征及岩浆动力学[J].岩石矿物学杂志,1993,12(1):20~30.