Identify the surface ore-induced geochemical anomalies for the concealed deposits in buried areas has still been a great challenge in recent geochemical exploration. In this study, to trace the source of the geochemical anomalies, systematically luminescence intensity analyses were conducted on quartz grains from the Quaternary regolith at the Hadatu sandstone-type uranium deposit in the Erenhot Basin. The optically stimulated luminescence (OSL) ages were much older than the depositional ages of the Quaternary regolith. Moreover, quartz OSL ages were closely related to the borehole grades and sampling depths. Thus, the abnormal mineral OSL ages from near-surface sediments was ultimately controlled by the sandstone-type uranium deposits. This is identical with the rapid changes of quartz OSL ages (0.063 ka/cm) and equivalent doses (0.19 Gy/cm) with depths in a given sampling site. The instantaneous soil radon concentration was positive correlated with quartz OSL apparent age, indicating their ore-induced origin and as a result, the effectiveness for exploration of concealed uranium deposits. Other parameters including the mobile-state uranium and ²¹⁰Po contents were poor correlations with quartz OSL ages and therefore, should be caution for geochemical exploration. This is the first time to discriminate the ore-induced sources for different surface anomaly parameters including instantaneous soil radon, mobile-state uranium and ²¹⁰Po contents for the concealed sandstone-type uranium deposits.

中文翻译：

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光激发发光技术在隐伏砂岩型铀矿勘探中的应用

识别埋藏区隐伏矿床的地表成矿地球化学异常仍然是近年来地球化学勘探的一大挑战。本研究为追溯地球化学异常的来源，对二连浩特盆地哈达图砂岩型铀矿第四纪风化层的石英颗粒进行了系统的发光强度分析。光致发光（OSL）年龄远大于第四纪风化层的沉积年龄。此外，石英 OSL 年龄与钻孔等级和采样深度密切相关。因此，近地表沉积物的异常矿物 OSL 年龄最终受砂岩型铀矿床的控制。这与石英 OSL 年龄 (0.063 ka/cm) 和等效剂量 (0. 19 Gy/cm) 与给定采样点的深度。瞬时土壤氡浓度与石英 OSL 表观年龄呈正相关，表明其成矿来源，因此对隐蔽铀矿床勘探具有有效性。其他参数包括移动态铀和²¹⁰ Po含量与石英OSL年龄相关性较差，地球化学勘探应谨慎。这是首次对隐伏砂岩型铀矿床的瞬时土壤氡、流动态铀和^{210 Po 含量等不同地表异常参数判别成矿来源。}