湖南前寒武纪地层古地磁特征及地质意义

PALEOMAGNETIC CHARACTERISTICS OF PRECAMBRIAN STRATA IN HUNAN AND THEIR GEOLOGICAL SIGNIFICANCE

探讨了湖南前寒武纪地层的地磁学特征，利用其古磁极论证了湖南前寒武纪武陵运动、雪峰运动与冷家溪群、板溪群（高涧群）、震旦系之间的时空关系。古地磁极移轨迹曲线表明：湖南微陆块与扬子古陆有密切的亲缘性。

This paper deals with some paleomagnetic features of Precambrian strata in Hunan province .On the basis of the paleomagnetic data and qualitative comparative studies,the authors discuss in detail the temporal-spatial relationships of the Wuling movement (1000 Ma B.P.)and Xuefeng movement (800 Ma B.P.)with the Lengjiaxi Group ,Banxi Group (Gaojian Group)and Sinian strata.The APWP curves show that the Hunan microcontinental block has a close affinity with the Yangtze paleocontinental block,both of which had drifted to their present locations before the Cambrian.