摘要
在古地磁研究中,次生剩磁往往被作为“有害组分”而剔出。本文为了说明次生剩磁的利用。笔者采用了多种方法,对云南不同时代地层的1238个古地磁样品作了较详细的研究。结果表明,云南曾遭受过多期重磁化作用,其中全新世和始新世时期的重磁化影响面最大。始新世产生的与印度次大陆同欧亚大陆的碰撞有关。本成果为了对云南的古地磁次生与原生剩磁的辩别提供依据,也为次生剩磁的应用开拓新的途径。
The secondary remanent magnetism has long been rejected as an harmful component in paleomagnetism researches. In order to explain the utilization of the secondary remanent magnetism, the authors collected 1238 paleomagnetic samples from the strata of different ages within the boundaries of Yunnan province. Results indicate that the Yunnan region had undergone multiple remag-netism of which the remagnetism occurred in the Recent and Eocene had the greatest influence on this region and that occurred in Eocene was related to the collision between the India Subcontinent and Eurasia Continent.
出处
《云南地质》
1992年第1期39-46,共8页
Yunnan Geology
