Abstract：Since the new century, the uranium mine geological exploration of China has made great breakthroughs that the productivity has been stably improved, the scientific and technological innovation has gotgreater fruits, the foreigncooperation has been stably proceeding,and the overseas development has achieved active progress. Now, China is facing the important strategic opportunity of deepening reform and making innovation & development in the natural uranium industry. Accordingly, through analyzing the opportunities and problems in front of the uranium mine exploration and development of China,China National Nuclear Corporation proposed the development idea and work emphasisoncontinuously promoting the cooperation in the natural uranium industry, actively making the development in the coexistedand associated uranium mine resources, supplying theoverall service forthe mine construction and geologicaltechnique, and insisting on the principle of "go global" to realize both the domestic and overseas development.
陈跃辉. 中核集团铀矿勘查开发新进展[J]. 中国地质调查, 2014, 1(3): 32-43.
CHEN Yue-hui. Progress of Uranium Mine Exploration and Development by China National Nuclear Corporation. , 2014, 1(3): 32-43.
呈似层状,具分枝复合特点,走向近南北向,西倾,倾角25°～35°,南北长1 050 m,宽50～114 m,矿体平均厚66.4 m,矿化较均匀,平均Li2O品位1.5％,共伴生有BeO、CsO、Ta2O5、Nb2O5、Sn等,可综合回收利用。经储量估算,新增已控制332+333+334类矿石资源储量达64.31万吨,达超大型规模。这一找矿突破性新进展,新增的氧化锂资源储量,约占近50年已累计查明资源储量的一半以上[7](图5至图8)。 2.2 重新厘定了对进一步开展找矿与评价具指导意义的直接和间接的找矿标志 (1)在甲基卡矿区北部,前人曾将含矿伟晶岩块堆积体划属第四系冰积物,通过项目组认真的地质填图和精细的遥感解译,发现堆积体大多具线性带状分布,在第四系掩盖区常形成微地貌隆起等特点,并与零星矿体露头对应,应属准原地的含矿伟晶岩残坡堆积物,故将其视为直接找矿标志。后经槽探揭露证实,在所圈定的含矿伟晶岩残坡堆积物分布区,新发现8条锂矿化伟晶岩脉,氧化锂品位为1.5%～1.86%。 图5 钻探获取的岩心(全脉见矿,取芯率100%) Fig.5 Entire vein mineralization, coring rate 100% 图6 部分勘探剖面示意图 Fig.6 Schematic diagram of part exploration profile 1. 第四系坡积物;2. 锂辉石伟晶岩矿体;3. 锂辉石钠长石矿化伟晶岩;4. 灰-深灰色堇青石化十字石红柱石二云母片岩 图7 验证孔部分钻孔柱状图 Fig.7 Part drilling logging of verification holes 图8 X03锂辉石矿脉钻探验证前后的变化 Fig.8 Comparison of X03 spodumene vein before and after the drilling verification 左图:1. 第四系坡积物;2. 锂辉石矿化伟晶岩体;3. 灰-深灰色十字石红柱石二云母片岩;4. 地质界线 右图:1. 第四系坡积物;2. 锂辉石矿化伟晶岩残积物;3. 锂辉石伟晶岩矿体;4. 新都桥组二段;5. 灰-深灰色十字石红柱石二云母片岩; 6. 地质界线;7. 钻孔及编号;8. 探槽及编号
(2)红柱石-十字石动热变质带,近矿脉棕黑色电气石角岩和叶片状堇青石化 ,以及强烈钠长石化和蓝色电气石化也应是间接找矿标志。 (3)具色调浅、高反射率与线性分布特点的遥感影像,多指示为花岗伟晶岩脉产出。 (4)高电阻率物探带状异常,并有与之对应或相伴的、具有浓集中心的锂、铍、铷、锡组合异常,可将其列为重点查证的找矿靶区(图9)。 图9 重点评价区——验证A区物化探异常示意 Fig.9 Geophysical and geochemical anomaly map of key evaluation areas—verification of A district
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Achievements in the Investigation and Evaluation of Spodumene Resources at Jiajika in Sichuan, China
FU Xiao-fang1, WANG Cheng-hong2, YUAN Lin-ping3, LIANG Bin4, HAO Xue-feng1, Pan Meng4 (1. Sichuan Institute of geological survey, Chengdu, 610081, China; 2. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing, 100037, China; 3. Sichuan Geological Minerals Company, Chengdu, 610081, China; 4. Southwest University of Science and Technology; Mianyang, 621010, China)
Abstract: Our project team fulfilled the transformation from scientific research to practical exploration within the shortest possible time and established a set of exploration methods and processes for rare pegmatite in concealed areas: monographic study→ remote sensing interpretation and geological mapping → preferred target area → geochemical analysis→ geophysical prospecting orientation→ drilling verification. Eight new mineralization pegmatite veins were found; through drilling, Vein X03 was proved to be a huge spodumene pegmatite vein. It was found that there were rich lithium resources with a total reserve of 643100 tons. The grades of niobium, tantalum, beryllium, rubidium, cesium and tin also reached the industrial levels. The metallogenic regularity and prospecting marks discussed in this paper will guide the selection of target areas. The results are of great significance for the development of China's strategic emerging industries, improving the local economy, and enhancing the security level of lithium resources in China. Key words: Jiajika; spodumene; mineral survey; lithium resources; strategic emerging industry
2014, Vol. 1 
