秦嶺造山帶發(fā)現新型鈾多金屬礦:華陽川與偉晶巖脈和碳酸巖脈有關的超大型鈾-鈮-鉛-稀土礦床
[Abstract]:The Huayangchuan uranium polymetallic deposit is located in the western section of the Xiaoqinling tectonic belt on the southern margin of the North China plate. The orebody is mainly located in the Archean TTG gneiss suite (Wujiaping Heyunshinobian gneiss and Dayuping granitic gneiss). Mineralization is closely associated with pegmatite veins, igneous carbonatite veins and carbonate veins. The pegmatite vein is mainly composed of microplagioclase, quartz, biotite, hornblende, cinnamon, sphene and monazite. Carbonate veins are mainly composed of calcite, quartz, barite, aegiropyroxene, sodium amphibole, biotite and apatite. Carbonate veins are mainly composed of calcite, quartz, barite and zeolite. According to the interpenetrating relationship of vein and mineral assemblage, mineralization can be divided into pegmatite stage, early carbonatite stage and late carbonation stage, pegmatite stage and early carbonatite stage dominated by uranium and niobium mineralization. The late carbonization stage is dominated by lead mineralization. The main uranium minerals are niobium and titanium uranium, the second are crystalline uranium, the niobium minerals are niobium-titanium uranium, the brown yttrium niobium is the second, the lead is galena, the second is white lead. In addition, UHNb also exists in minerals enriched with rare earth elements, such as cinnamon, monazite and apatite, in the form of similar or adsorption. According to the characteristics of ore-bearing main rocks, ore minerals and metallogenic elements, the Huayangchuan deposit is different from other types of uranium deposits in the world and belongs to uranium-niobium-lead-rare earth deposits related to pegmatite and carbonatite.
【作者單位】: 中陜核工業(yè)集團二二四大隊有限公司;中國科學院廣州地球化學研究所礦物學與成礦學重點實驗室;
【基金】:國家重點研發(fā)計劃“深地資源勘查開采”專項(2017YFC0602304,2017YFC0602205) 陜西省自然科學基礎研究計劃面上項目(2016JM4009) 陜西省地勘基金(61201405236)
【分類號】:P619.14;P619.2
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