攀枝花-西昌古裂谷与“活化”的地球物理特征

本文对近年来在攀枝花-西昌（攀西）构造带所做的重力、地磁、航磁、古地磁、遥感、天然地震、大地电磁测深、地热和爆炸地震探测资料,进行了综合分析和研究,得出了该构造带的深部结构和地球物理场的特征。基于此,提出了攀西吉裂谷存在的地球物理标志,论述了该裂谷带与现代强烈活动的裂谷带和已消亡的古裂谷的差异与其“活化”的证据。本文最后提出,这是一个被动“活化”的古裂谷的论点。

PANZHIHUA-XICHANG ANCIENT RIFT AND“ACTIVITED” GEOPHYSICAL FEATURES

Panxi region crosses Sichuan and Yunan provinces with abnormal earthquake activities and abundant mineral products. Comprehensive analyses and studies of this region have been carried out on the basis of the data from gravity field, aeromagnetic survey, magnetism, paleo-magnetism, magnetotelluric deep sounding, geothermal and heat flow values, remote sensing and geotectonics as well as earthquakes observed in recent years around this region and its adjacent zones. It is suggested that the basic model of formation and evolution of Panxi tectonic zone is that it is a passive, re-activated ancient rift zone.