| 岩石圈磁场研究--卫星地磁学的一个新分支 |
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| 引用本文： | 张昌达.岩石圈磁场研究--卫星地磁学的一个新分支[J].地质科技情报,2001,20(3):83-90. |
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| 作者姓名： | 张昌达 |
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| 作者单位： | 中国地质大学地球物理系 |
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| 摘 要： | 评介了卫星磁测的历史和现状 ,并向读者推荐了全球和中国的卫星磁异常图以便研究利用 ;对中国境内的卫星磁异常进行了初步的解释 ,主要结果如下 :华北、塔里木和扬子地台与正异常重合 ,而碰撞造山带、褶皱带、山脉则与负异常重合 ;塔里木、四川、松辽盆地之下 ,都有一个扁平的、致密的磁性底座 ;西藏高原地壳中的磁性层在地表以下 30 km以内 ,其磁化率约为0 .0 163SI,相当于 I型花岗岩类的磁性 ;在南中国海海域 ,有两个伸展很大的磁性层 ,位于莫霍面上下 ,黄海海域的岩石圈内也有类似的一个磁性层。
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| 关 键 词： | 岩石圈磁异常 磁力仪卫星 中国卫星磁异常 |
| 文章编号： | 1000-7849(2001)03-0083-08 |
| 修稿时间： | 2001年6月8日 |
STUDY OF LITHOSPHERIC MAGNETIC FIELD:A NEW SUBDISCIPLINE OF SATELLITE GEOMAGNETISM |
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| Zhang Changda.STUDY OF LITHOSPHERIC MAGNETIC FIELD:A NEW SUBDISCIPLINE OF SATELLITE GEOMAGNETISM[J].Geological Science and Technology Information,2001,20(3):83-90. |
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| Authors: | Zhang Changda |
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| Abstract: | By satellites with magnetometers, geomagnetic anomalies originated from many geological features of the earth's lithosphere can be detected and mapped. Interpreting lithospheric field from satellite magnetic data can provide new insights into the tectonic features and broad structures of the lithosphere. Recently, a new subdiscipline of satellite geomagnetism:the study of lithospheric magnetic field,has been formed. This paper has reviewed the history and state of the art of satellite magnetic measurement and recommended global satellite magnetic anomaly maps and those over China to readers for the use of study. It also presents a preliminary interpretation of satellite magnetic anomalies over China.The main points are as follows: North China, Tarim and Yangtze platforms are coincident with positive magnetic anomalies, and collision orogens, belt of fold strata, mountain range, negative. Each of Tarim, Shichuan, Songliao basins, has a huge, dense and magnetic foundations. The magnetic layer of the Tibetan Plateau crust is within 30 km beneath the surface with susceptibility about 0.016 7SI. In South China Sea area there are two extensive magnetic layers seated nearby Moho, and there is a similar one located in Yellow Sea area. |
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| Keywords: | magnetic anomaly of lithosphere MAGSAT satellite magnetic anomaly over China |
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