| 火山岩盖层下地震找矿技术试验 |
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| 引用本文： | 徐明才,刘建勋,张保卫,王广科.火山岩盖层下地震找矿技术试验[J].物探与化探,2012,36(6):928-933. |
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| 作者姓名： | 徐明才 刘建勋 张保卫 王广科 |
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| 作者单位： | 中国地质科学院地球物理地球化学勘查研究所,河北廊坊,065000 |
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| 基金项目： | 国土资源部公益性行业科研专项经费(201111018);地质大调查项目(1212010916029) |
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| 摘 要： | 火山岩的密度和地震波传播速度一般高于相同深度的沉积围岩,与围岩具有较明显的密度和速度差,由于火山岩与围岩界面形态及产状复杂,导致地震波成像困难.笔者结合澧水火山岩盆地地震勘探试验工作,讨论了适合于火山岩盖层下寻找深部金属矿的地震勘探技术.采用小道间距、长排列、高覆盖次数、火山岩顶界面(或火山岩内部)激发的采集方式,有助于获取火山岩内部及其下伏地层界面产生的反射波.
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| 关 键 词： | 地震方法 金属矿勘查 火山岩 能量屏蔽 |
EXPERIMENTAL STUDY ON SEISMIC PROSPECTING TECHNOLOGY UNDER VOLCANIC ROCK COVER |
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| XU Ming-cai,LIU Jian-xun,ZHANG Bao-wei,WANG Guang-ke.EXPERIMENTAL STUDY ON SEISMIC PROSPECTING TECHNOLOGY UNDER VOLCANIC ROCK COVER[J].Geophysical and Geochemical Exploration,2012,36(6):928-933. |
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| Authors: | XU Ming-cai LIU Jian-xun ZHANG Bao-wei WANG Guang-ke |
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| Institution: | (Institute of Geophysical and Geochemical Exploration CAGS,Langfang 065000,China) |
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| Abstract: | Density and seismic wave velocity of volcanic rock generally higher than the sedimentary rock at same depth, it possesses more obvious density and velocity differences with surrounding rock. Interface shape and occurrence between volcanic rocks and surrounding rock are complex, resulting in seismic wave imaging difficulties. The authors discuss the seismic technology suitable for prospecting deep metal mine under volcanic cover combing with seismic exploration in Lishui volcanic basin. It helps to obtain the reflected wave formed by volcanic rock internal and its underlying strata interface using acquisition pattern of small group interval, long spread, high fold, shooting at volcanic rock top interface or internal volcanic rocks. |
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| Keywords: | seismic method metal exploration volcanic rock energy shielding |
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