世界磁异常图

第一版的世界磁异常图,此前称为世界数字化磁异常图(WDMAM),于2007年7月在第24届IUGG大会上正式公布。这幅图的编制工作是由国际地磁学与大气物理学协会(IAGA)和世界地质图委员会(CGMW)合作完成,得到联合国教科文组织(UNESCO)赞助,由UNESCO和CGMW出版。这幅图表示的地壳磁异常数据,是50多年来全世界积累的航空、海上和卫星磁测所获得的,汇合成5 km×5 km网格,换算到大地水准面上5 km。WDMAM的公布将进一步推动地壳和上地幔地质构造的研究,并且有助于资源的勘查。第二版WDMAM正在编制中。

WORLD MAGNETIC ANOMALY MAP

The first edition of The Magnetic Anomaly Map of the World, formerly named World Digital Magnetic Anomaly Map (WDMAM), was made public at the 24th IUGG General Assembly in July, 2007. The compilation of the map was conducted jointly by IAGA and CGMW with the support of UNESCO, and the map was published by the UNESCO and the CGMW. The crustal magnetic field anomaly data were obtained from airborne survey, shipborne survey and satellite acquisition all over the world in a period of more than 50 years. The data merged into a composite 5 km×5 km grid and a nominal height above geoid of 5 km. The publication of the WDMAM will give an impetus to researches on the geological structure of the crust and the uppermost lithosphere, and is conducive to resource exploration. The second edition of the WDMAM is now under compilation.