The Bozhushan Ore Field, located at the western margin of the South China Block, is an important area for Ag-Pb-Zn-W polymetallic mineralization which may be associated with the Late Cretaceous granitic magmaism. In this paper, the singular value decomposition (SVD) was effectively applied to decompose gravity data at scale of 1: 50 000 within the Bozhushan Ore Field to extract deep ore-finding information. Two gravity anomaly images displaying different scales of the ore-controlling factors were obtained. (1) The low-pass filtered image may reflect the deeply buried geological structures, hidden intrusions and concealed ore bodies. The negative gravity anomaly may reflect the overall distribution of granite bodies in the Bozhushan Ore Field. One negative gravity anomaly area may correspond to the exposed part of the Baozhushan granitic intrusion and the other corresponds to the concealed part of the granitic intrusion. The granitic intrusions are the main ore-controlling factors in this ore district. (2) The band-pass filtered image depicts the shallow concealed geological structures and geological bodies within this study area. There are two obvious negative gravity anomalies, which may be created by the hidden granites at different depths at both northwestern and southeastern sides of the exposed granitic intrusion. Thus the two negative gravity anomalies are favorable prospecting areas for various type of polymetallic ore deposits at depth. The gravity anomalies extracted by using the SVD exactly reflect the distribution of the ore deposits, structures and intrusions, which will give new insights for further mineral exploration in the study area.

博竹山矿田位于华南地块的西部边缘，是Ag-Pb-Zn-W多金属矿化的重要区域，可能与白垩纪晚期花岗岩岩浆活动有关。本文通过有效地利用奇异值分解（SVD）分解了博竹山矿田中1：50 000范围内的重力数据，以提取深部找矿信息。获得了两个显示不同比例的控矿因素的重力异常图像。（1）低通滤波后的图像可能反映了深埋的地质构造，隐蔽的侵入体和隐蔽的矿体。负重力异常可能反映了博竹山矿田花岗岩体的整体分布。一个负重力异常区域可能对应于宝珠山花岗岩侵入体的裸露部分，另一个对应于花岗岩侵入体的隐蔽部分。花岗岩侵入是该矿区的主要控矿因素。（2）带通滤波后的图像描绘了该研究区内的浅层隐蔽地质结构和地质体。在暴露的花岗岩侵入带的西北和东南侧，不同深度的隐蔽花岗岩可能造成两个明显的负重力异常。因此，这两个负重力异常是深部各种类型多金属矿床的有利找矿区。使用SVD提取的重力异常准确反映了矿床，构造和侵入体的分布，