| 马玉香,黄美化,刘帅,林子瑜.基于多元地学异常信息提取的相山铀矿田铀成矿规律[J].矿产勘查,2025,16(4):802-812 |
| 基于多元地学异常信息提取的相山铀矿田铀成矿规律 |
| The uranium ore-forming pattern of the Xiangshan uranium field derived from the extraction of multi-disciplinary geo-anomaly information |
| 投稿时间：2024-04-23 |
| DOI：10.20008/j.kckc.202504011 |
| 中文关键词: 遥感地质 信息提取 成矿规律 相山铀矿田 |
| 英文关键词: remote sensing geology information extraction metallogenic regularity Xiangshan uranium orefield |
| 基金项目:本文受国家自然科学基金(41662006、41862013)资助。 |
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| 中文摘要: |
| 相山火山盆地被视为中国火山岩型铀矿的一个重要产区。本文基于遥感地质信息提取等新技术，对相山铀矿田遥感、航空能谱、地面重磁等多元地学信息集成和分析，揭示了相山火山盆地的总体特征、铀矿田矿区的分布规律:(1)遥感构造异常特征表现出相山铀矿田北部矿区主要分布在环形构造内，西部和东部矿区则主要分布在菱格状构造及近 SN向线性构造的交汇处；(2)相山矿田北部矿床主要分布在钍高值区，西部邹家山矿床分布在钍钾高值区，而河源背—石洞一线矿床则分布在钍钾向铀钾过渡的区域，东部云际矿床为钍钾高值区；(3)从盆地中心向盆地外围重力异常总体由低向高变化简单，呈三级环状分布；(4)相山火山盆地磁场分布特征较为复杂，以牛头山—乐家—云际为界分为 2个片区:界线以北主体为低值区，零星混杂着一些小面积的高场区，界线以南由 2个高场区和穿插于其中的低值区组成，铀矿床主要分布在低值区。遥感地质信息提取的航空能谱异常、布格重力异常和地面磁测异常能够反映矿田深部有利成矿部位，对深部找矿具有指导作用。 |
| 英文摘要: |
| The Xiangshan volcanic basin is recognized as one of China′s most important production areas forvolcanic rock-hosted uranium deposits. This study employs advanced remote sensing geological extraction tech-niques to conduct an integrated analysis of multi-source geoscientific data, including remote sensing imagery, air-borne radiometric surveys, and ground-based gravity-magnetic measurements from the Xiangshan uranium field.The research reveals critical characteristics of the volcanic basin and elucidates the distribution patterns of uraniummineralization: (1) Remote sensing structural analysis demonstrates distinct spatial controls on uranium mineraliza-tion: deposits in the northern ore field predominantly occur within ring structures, while western and eastern depos-its are mainly localized at the intersections of rhombic-grid structures and submeridional (SN-trending) linear fea-tures. (2) Radiometric signatures exhibit systematic zonation: northern deposits correlate with high thorium (Th)anomalies; the Zoujiashan deposit in the west is associated with elevated thorium-potassium (Th-K) values; theHeyuanbei-Shidong trend occurs in transitional zones between Th-K and uranium-potassium (U-K) anomalies;and the eastern Yunji deposit coincides with a prominent Th-K anomaly. (3) Gravity data reveal a concentric zona-tion pattern, with Bouguer anomalies progressively increasing from the basin center toward the periphery, formingthree distinct annular zones. (4) Magnetic surveys delineate a complex field pattern, divided by the Niutoushan-Lejia-Yunji structural boundary: the northern domain is characterized by a low-intensity magnetic field with local-ized high anomalies, whereas the southern sector comprises two high-intensity zones separated by low magneticanomalies. Notably, uranium deposits show a preferential association with low magnetic field domains. The inte-grated interpretation of airborne radiometric anomalies, Bouguer gravity gradients, and ground magnetic signatureseffectively constrains favorable deep-seated mineralization targets, providing critical exploration vectors for deepprospecting in the region. The methodology demonstrates significant potential for guiding uranium exploration inanalogous volcanic terrains. |
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