西藏措勤尼雄地区地面磁法测量及其地质意义

Magnetic survey in Cuoqin-Angren region,Tibet and its geological significance

在《西藏措勤-昂仁地区铁铜矿评价》工作中,安排了1∶5万地面磁法测量。地面ΔT表明:整个工区属磁异常区,表现出北西低、南东高的总趋势。通过对磁测资料的转换处理,发现磁场特征与青藏高原中西部航磁调查所反映的地球物理特征基本吻合,反映了全工区磁场的变化特征,证实了藏C-99-297航磁异常的存在,应为矿致异常,可以指导青藏高原中西部找矿工作。通过对磁测剖面数据的推断,结合异常查证,在全工区圈出一批具有找矿意义的异常,为今后该地区基础地质研究和矿产资源评价提供了可靠的地球物理资料,并为今后在青藏高原开展矿产资源评价工作提供了切实可行的工作思路。

According to the study of characteristic of magnetite and the work of 1 ： 50000 magnetic survey on the ground the result of AT shows that the Cuoqin-Angren area is magnetic anomaly with low magnetic anomalous in northwest and high in southeast. By researching the data of magnetic survey, we found that the characteristics of magnetic field were accorded with that of geophysics from 《Aeromagnetic Survey in Central and Western Qinghai -Tibet Plateau》 ,and expressed the characteristic of magnetic anomalous field variation in the area. It is confirmed that the magnetic anomaly of Tibet-C-99-297 is the mineral anomaly,and can direct ore prospecting in Qinghai-Tibet plateau. A number of anomalies showing features of mineral prospecting have been found which provided reliable geophysical data and the realistic working methods for the fundamental geological research and the mineral resources exploration and evaluation in future.