世界核地质科学

黑龙江省逊克地区乌云组铀矿地质研究相对薄弱，通过典型露头-岩心观察、高品质测井曲线解译，薄片鉴定、连井剖面、沉积相等多种手段，总结了黑龙江省北部逊克地区古近系乌云组沉积相-砂体特征。研究认为逊克地区整体铀源丰富，目的层乌云组可分为上、下两段，均发育冲积扇-辫状河相沉积，辫状河相在乌云组上、下段各发育一厚层砂体，砂体分布范围广，连通性好，后生蚀变强，是铀富集成矿的有利相带砂体。在此基础上结合研究区铀源、岩性-岩相、砂体和后生蚀变等综合分析认为乌云组具有较大的铀矿找矿潜力。

The geological research on uranium deposits in the Wuyun formation of Xunke area，Heilongjiang province，has been relatively limited. This study integrates field observations of outcrops and cores，high-quality well logging curve interpretation，thin-section analysis，cross-well profiles，and sedimentary facies analysis to summarize the sedimentary facies and reservoir characteristics of the Paleogene Wuyun formation in northern Xunke，Heilongjiang. The results indicate that the Xunke region is generally rich in uranium sources. The target Wuyun formation can be divided into upper and lower sections，both dominated by alluvial fan and braided river facies. Within each section，a thick sand body developed under braided river conditions exhibits extensive distribution，good connectivity，and strong secondary alteration，making it a favorable facies zone for uranium enrichment and mineralization. Based on comprehensive analyses of source rocks，lithology-facies，reservoirs，and secondary alteration，this study concludes that the Wuyun formation possesses favorable uranium source conditions and holds significant potential for uranium exploration.