重庆城口修齐锰矿AMT法深部找矿预测
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摘要
重庆城口是我国锰矿重要产地之一。由于大规模矿业开发,使得城口地区锰矿资源枯竭,急需在深部及外围发现新资源。在研究城口修齐锰床成矿地质背景、矿体赋存地层、岩性及岩石物理参数基础上,对成矿条件优越地段进行音频大地电磁测深法(AMT)测试研究。通过数据处理,生成修齐锰矿电阻率剖面图,其结果较好的反映深部地层分布及断裂构造位置。结合实测剖面及钻探验证,显示音频大地电磁测深法反演的深部地层、断裂构造及隐伏锰矿赋存位置十分吻合,找矿效果良好,AMT方法为城口地区锰矿深部勘查起到指示作用。
Chongqing is one of important manganese ore places of origin in China. In recent years,due to large-scale mining development,we have made the manganese resources depletion in Chengkou county of Chongqing. To solve the lack of manganese resources in this area,we have found new resources in deep and peripheral areas.Based on the ore-forming geological background,including ore-bearing strata,petrological characteristics and geophysical parameters,we will be using audio-frequency magnetotelluric method( AMT) in favorable conditions for mineralization. The pseudo resistivety section chart was built after an analysis of the treatment of testing data. It preferably reflects the strata and structural features in the deep of Xiuqi area. Geological section and drill data show that AMT can be inferred in the location and scale of buried strata,including structures and distributions of series of strata with manganese in the investigation area. AMT method can accurately reflect the distribution of the strata with manganese ore bodies. It has taken a guide for the deployment of manganese exploration in Chengkou area.
Chongqing is one of important manganese ore places of origin in China. In recent years,due to large-scale mining development,we have made the manganese resources depletion in Chengkou county of Chongqing. To solve the lack of manganese resources in this area,we have found new resources in deep and peripheral areas.Based on the ore-forming geological background,including ore-bearing strata,petrological characteristics and geophysical parameters,we will be using audio-frequency magnetotelluric method( AMT) in favorable conditions for mineralization. The pseudo resistivety section chart was built after an analysis of the treatment of testing data. It preferably reflects the strata and structural features in the deep of Xiuqi area. Geological section and drill data show that AMT can be inferred in the location and scale of buried strata,including structures and distributions of series of strata with manganese in the investigation area. AMT method can accurately reflect the distribution of the strata with manganese ore bodies. It has taken a guide for the deployment of manganese exploration in Chengkou area.
引文
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[2]陈佳.重庆城口高燕锰矿床地球化学特征及成因分析[D].成都:成都理工大学,2016.
[3]朱明忠,宋志娇,陈翠华,等.重庆城口高燕锰矿床矿物学特征及成矿环境分析[J].矿产与地质,2015,29(6):771-775.
[4]程万强,杨坤光.大巴山构造演化的石英ESR年代学研究[J].地学前缘,2009,16(3):197-206.
[5]沈传波,梅廉夫,汤济广,等.大巴山逆冲推覆带构造扩展变形的年代学制约[J].原子能科学技术,2008(6):574-576.
[6]李学刚,杨坤光,王军.东秦岭—大别造山带南、北缘晚白垩世以来构造演化的石英ESR年代学研究[J].现代地质,2012,26(2):308-316.
[7]李岩峰,曲国胜,刘殊,等.米仓山、南大巴山前缘构造特征及其形成机制[J].大地构造与成矿学,2008(3):285-292.
[8]张俊.重庆城口地区陡山沱组层序地层及锰矿控矿研究[D].成都:成都理工大学,2015.
[9]韩旭渊.重庆修齐锰矿床成矿模式研究[D].成都:成都理工大学,2015.
[10]宋备,陈翠华,朱明忠,等.重庆城口高燕锰矿床矿石组构特征研究[J].矿床地质,2014,33(S1):813-814.
[11]王尧,戴永定,陈孟莪.重庆城口锰矿床的地质特征及其成因的再认识[J].地质科学,1999,34(4):451-462.
[12]曾令熙,朱志敏.重庆城口锰矿的工艺矿物学特征[J].矿物学报,2014,34(3):374-378.
[13]姚大为,朱威,王大勇,等.音频大地电磁法在武山外围深部勘查中的应用[J].物探与化探,2015,39(1):100-103.
[14]杨炳南,周琦,杜远生,等.音频大地电磁法对深部隐伏构造的识别与应用:以贵州省松桃县李家湾锰矿为例[J].地质科技情报,2015(6):26-32.
[15]周军,袁伟,连晨龙.可控源音频大地电磁法(CSAMT)一维全区Levenberg-Marquardt反演方法[J].科学技术与工程,2014(14):129-134.
[16]张德实,沈小庆,何帅.音频大地电磁法在松桃县寨英锰矿区的应用[J].工程地球物理学报,2016(3):294-298.
[17]吴信雍,李余生,朱明忠,等.重庆高燕锰矿床的主量元素特征及其成因意义[J].科学技术与工程,2015(17):109-112+116.
[18]Share P E,Jones A G,Muller M R,et al.An audiomagnetotelluric investigation of the Otjiwarongo and Katima Mulilo regions[J].Geophysics,2014,79(4):B151-B171.