关键词: 地面γ能谱测量　, 铀-多金属　, 放射性元素(铀、钾)场特征　, 东乡火山盆地

Abstract: The Dongxiang volcanic basin is located in the middle section of the Gan-Hang uranium mineralization belt and the eastern section of the Qin-Hang polymetallic mineralization belt.It has excellent geological conditions for mineraliza tion,with well-developed uranium and polymetallic mineralization,and significant potential for regional mineral exploration.The current new round of mineral exploration breakthrough strategy action has put forward an urgent demand for efficient and pre cise mineral exploration in this area.How to rely on effective geophysical exploration methods to clarify the coupling relation ship between the radioactive element field characteristics and mineralization and improve the efficiency and accuracy of mineral exploration prediction is a key engineering and technical problem faced by this area.This study aims to clarify the applicability and application effect of ground gamma-ray spectrometry in the exploration of uranium and polymetallic minerals in the Dongx iang volcanic basin,and provide technical support for regional mineral exploration deployment.By systematically obtaining data on radioactive elements such as uranium and potassium in the study area,the distribution patterns of radioactive element anom alies are analyzed in detail.By comparing the spatial distribution of anomalies with the known mineralization and wall rock al teration,the intrinsic connection between the element field characteristics and uranium and polymetallic mineralization is sum marized,and the preferred exploration targets are selected.This method forms a targeted application idea for the exploration of regional volcanic rock-type uranium and polymetallic minerals.The study results show that:① The uranium anomaly halo has a high spatial coupling degree with surface uranium and polymetallic mineralization,which can effectively delineate the enriched mineral parts;② The potassium content gradient zone is highly consistent with the development area of near-mine wall rock al teration,which can identify the favorable geological environment for mineralization;③ The combined anomaly formed by the u ranium anomaly halo and the potassium content gradient zone has a good match with the uranium and polymetallic ore bodies, which can significantly narrow down the exploration targets.The comprehensive delineation of Qilongmiao-Shangfangai and Chalin-Chuanling as the key exploration areas for the next step has confirmed that ground gamma-ray spectrometry has a good exploration effect in the Dongxiang volcanic basin and can provide methodological references for the exploration of similar vol canic rock-type uranium and polymetallic minerals.