| 中国地质普查勘探中的航空磁测工作 |
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| 引用本文： | 杨光庆,朱英.中国地质普查勘探中的航空磁测工作[J].地球物理学报,1979,22(4):374-382. |
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| 作者姓名： | 杨光庆 朱英 |
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| 作者单位： | 国家地质总局航空物探大队 |
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| 摘 要： | 我国的航空磁测工作,已经有二十六年的历史。到1978年底为止,全国已完成了近700万测线公里,实际覆盖面积约750万平方公里（其中包括海域120万平方公里）。现在全国各个部门中,用于航空磁测的飞机,每年可达30来架,建立了相当的航空物探队伍。 航空磁测在矿产普查中发挥了重大作用。圈定的局部航磁异常达20000多处,其中反映和被证实为各种规模的磁铁矿床及其它金属矿床的异常,占总数的3.5％。以航磁异常为线索,新发现的铁矿和其它金属矿达240多处,其中大中型的占41％。 航空磁测在石油构造普查中,也取得了巨大的成绩,几乎是各个含油气盆地都曾被普查过,覆盖的面积达480万平方公里（包括海域120万平方公里）,为发现大庆、胜利、大港等著名油田,起了重要的作用。构造磁测在大地构造和深部构造研究方面,不仅从理论上而且从实践上都具有相当的地位,这已为地质界所公认。航空磁测确定的深大断裂带,是非常重要的地质构造单元,也是各种有用矿产普查的重要线索。 最后,作者还提出了对我国航空磁测研究发展工作的意见。
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| 关 键 词： | 航空磁测 地质普查 大地构造 勘探 直接发现 石油 金属矿产 平方 矿体 深部构造 |
AEROMAGNETIC SURVEY FOR GEOLOGICAL RECONNAISSANCE WORK IN CHINA |
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| Yang Guang-ching,Zhu Ying.AEROMAGNETIC SURVEY FOR GEOLOGICAL RECONNAISSANCE WORK IN CHINA[J].Chinese Journal of Geophysics,1979,22(4):374-382. |
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| Authors: | Yang Guang-ching Zhu Ying |
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| Institution: | Aerogeophysical Brigade, State Bureau of Geology |
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| Abstract: | Aeromagnetic survey in People's Eepublic of China has gone a long way since twenty-six years ago. Up to the end of 1978, we had flown about seven million line-kilometers, and the area actually covered amounted to about 7.5 million square kilo-meters （including offshore surveys 1.2 million square kilometers in area）. Now, the total number of aircrafts used for aeromagnetic surveys has reached nearly 30 per-year, and correspondingly there have been organized the brigades of aerogeophysical research.Aeromagnetics has played an important role in the search of industrial minerals. Local aeromagnetic anomalies were found in about 20000 localities, of which, 3.5% were later verified as magnetite deposites or other useful metallic ore-bodies. By use of indications given by the aeromagnetic anomalies, more than 240 iron and other metallic deposits have been discovered, of which, 41% are of large or moderate scales. Aeromagnetic surveys also had great successes in the search of oil/gas structures. Almost all of the oil/gas bearing sedimentary basins were covered by aeromagnetic surveys, the area covered amounting to nearly 4.8 million square kilometers （including 1.2 million square kilometers off-shore）. In exploration of such well-known oil-fields as Daching, Shengli, Dagang etc., aeromagnetic surveys have played an important role. The effectiveness of aeromagnetic surveys for the study of geotectonics and deep crustal structure was verified, not only on theoretical basis but also in practical applications. By use of aeromagnetic mapping, large deep faults were located. They are important tectonic features and possible indicators of mineralization.Finally, the prospect, of the development of aeromagnetic surveys in China is dis-cussed. |
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