东天山成矿带找矿潜力巨大，已有矿床大多分布在基岩出露区，而要在广阔的戈壁覆盖区发现隐伏矿床，传统地质方法面临巨大障碍。本项目聚焦于该成矿带土屋延东-大南湖多金属矿集区，引入宽频地震、大地电磁、重力和磁法等方法对研究区深部构造进行综合地球物理探测。布设面积性宽频地震台和大地电磁探测器阵列，获取地壳和上地幔地震波三维速度结构以及地壳三维电性结构。通过解析重力、磁法资料获取深达Moho面的三维密度结构和上地壳三维磁性体结构。研发基于交叉梯度约束的地球物理三维联合反演新算法，分析研究区实测数据并反演出可靠的深部三维物性结构。充分利用已有地质资料，构建三维地质模型，开发出地质信息约束的地球物理三维联合反演算法，实现地质信息与地球物理三维联合反演的关联、三维物性结构与三维地质模型的深度融合。通过本项目研究，将建立隐伏矿形成演化机制和地球物理响应与表征的方法技术体系，为东天山隐伏矿找矿突破提供技术支撑。

Eastern Tianshan metallogenic belt has great potential of mineral prospecting, and most discovered ore deposits distributed in the bedrock exposed area. However, conventional geological methods face with great obstacles to prospect the concealed deposits in the vast desert covered area. This candidate subject focuses on Tuwu-Yandong-Dananhu metallic deposits concentrating area in Eastern Tianshan, to carry out comprehensive geophysical detection by means of broadband seismic,magnetotelluric, gravity and magnetic methods. Detection arrays consisted by broadband seismic stations and magnetotelluric detectors will be set to acquire the images of three-dimensional seismic velocity structures in the crust and upper mantle and electrical structures in the crust. The three-dimensional density structures deep to the Moho and the distribution characteristics of upper crustal magnetic structures can be revealed by analyzing the existing gravity and magnetic data. A new joint inversion algorithm of three-dimensional geophysical methods will be developed based on cross-gradient constraint, to process geophysical survey data and obtain reliable three-dimensional physical structure in the deep earth. Based on existing geological data and studies of the target area, three-dimensional geological models will be constructed, and geology-constrained.inversion algorithms will be developed. These models and algorithms can correlate geological information and three-dimensional geophysical inversion together, and inseparably integrate the geological models and three-dimensional geophysical structures. By the study on three-dimensional geophysical joint inversion, this subject aims to build up a technology system to promote further research, including the formation and evolution mechanisms of the concealed ore deposits and its geophysical response and representation, and technically support the breakthrough of mineral prospecting in Eastern Tianshan.