宣郎地区基底构造特征

本文以宣城-郎溪地区的盆地为重点研究区，综合分析区域性重力、磁法资料，通过地面重力测量技术、高精度地面磁测，大地电磁测深等综合地球物理剖面，建立了宣城-郎溪地区基底构造格架，并探讨了其构造演化史。研究结果显示，宣城-郎溪地区基底构造格架主要呈北东向展布，研究区西部被江南深大断裂带所分割，断裂带北侧为北东向的古生界隆起，断裂带南侧为呈北东向展布的深厚断陷盆地，江南断裂带被一系列北西向断裂所切割，研究区南部主要受周王断裂带控制。此外，本次研究还认为，江南断裂带的北侧与北西断裂带的交汇处是找矿远景区。

Characteristics of the basement structure in Xuancheng-Langxi area

This paper takes Xuancheng-Langxi Basins as the key research area. Based on regional gravity and magnetic data, through integrated geophysical study, we established structural framework of the basement in Xuancheng-Langxi Basins and try to discuss its tectonic evolution history. Research shows that structural framework of Xuancheng-Langxi basement is northeast. The west of research area is controlled by Jiangnan deep fault. The north of Jiangnan fault is Paleozoic uplift and the south of Jiangnan fault is graben basin. Jiangnan fault is dissected by series fault. The south of research area is controlled by Zhouwang fault. Furthermore, the high potentials in exploring deposits is the intersection of Jiangnan fault and northwest fault.