Prospecting progress of Jiada lithium deposit in Ma'erkang City in the western Sichuan Province
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摘要:
可尔因矿田位于松潘—甘孜造山带中部，是川西重要的稀有金属矿集区，由于以往地质工作程度较低，多数矿化信息尚未得到有效验证。近年来，在该矿田东北部新发现加达锂矿，不断创新优化勘查技术方法组合，通过1∶2 000伟晶岩转石填图法和高密度电法测量、“以锂找锂”等创新技术，在加达矿区内发现含锂辉石伟晶岩脉30余条，通过钻探工程验证，初步估算Li2O潜在矿产资源超22万t，提交勘查区块建议并成功出让，公益性调查成果转化取得重大成效。结合2023年和2024年最新研究及勘查成果，认为加达矿区外围及深部仍具有较大的找矿潜力和资源前景，有望新提交超大型锂矿床1处。项目成果为川西大型锂矿资源基地的建设提供了新的资源保障，也为我国以锂为代表的战略性新兴产业的矿产资源勘查提供了示范。
Abstract:Ke'ergin ore field is located in central Songpan-Ganzi orogenic belt, as a key rare metal ore concentration area in the western Sichuan Province. Due to historically limited geological work, most of the mineralization information has not been effectively verified. In recent years, Jiada lithium deposit in the northeastern part of this ore field was discovered. And more than 30 spodumene-bearing veins in Jiada mine area were discovered by continuous innovation and optimization of exploration methodologies, 1∶2 000 pegmatite float boulder mapping, high-density resistivity survey and lithium-tracing exploration. Preliminary drilling verification indicates Li2O resources exceeding 220 000 t. The proposed exploration blocks were successful transferred, and significant public geological survey results were converting into economic value. The lateral extensions and deep exploration of Jiada mining area show promising potential for prospecting based on 2023-2024 advancements, and it's expected to newly discover a new super-large lithium deposit. These achievements could not only provide critical resource support for constructing the western Sichuan's lithium mining base, but also establish a benchmark for strategic mineral exploration in China's emerging industries.
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表 1 加达矿区主要锂辉石矿体特征
Table 1. Characteristics of main spodumene ore bodies in Jiada mining area
脉体编号 长度/m 厚度/m 产状/(°) 形态 平均品位/% 倾向 倾角 Li2O BeO (Nb, Ta)2O5 36-1 1 068 10.5~20.85 325° 55° 脉状 1.68 0.053 0.020 0 36-2 622 2.87~7.98 325° 84° 脉状 0.48 0.047 0.024 0 36-3 377 4.92 325° 80° 透镜状 1.35 0.049 0.025 36-4 380 9.95 325° 72° 透镜状 1.66 0.053 0.029 36-5 1 118 3.72 325° 69° 脉状 1.12 0.044 0.023 36-6 396 30.48 325° 70° 透镜状 1.52 0.048 0.028 62-1 250 4~20 走向234° - 脉状 2.44 0.30 0.010 62-2 315 5 走向222° - 脉状 2.51 0.04 0.015 62-5 50 2 260° 86° 透镜状 2.46 0.040 0.010 62-6 169 5 58° 75° 脉状 1.62 0.062 0.014 62-7 95 8 60° 70° 脉状 2.81 0.053 0.017 63 420 16.0~23.5 走向325° - 脉状 1.26 0.05 0.020 65 214 4 走向324° - 脉状 1.24 0.05 0.020 66 405 4.4~10.0 50° 65° 脉状 1.29 0.045 0.020 67 90 4 走向341° - 脉状 1.84 0.10 0.020 69 500 2~12 260° 85° 脉状 1.52 0.045 0.021 70 35 3.5 247° 78° 透镜状 1.22 0.065 0.030 71 58 5 70° 85° 透镜状 0.63 0.050 0.027 72 400 3~8 走向331° - 脉状 1.89 0.05 0.024 73 25 5 走向340° - 透镜状 1.22 0.05 0.017 74 40 4 走向340° - 透镜状 2.43 0.04 0.010 75 20 4 走向343° - 透镜状 2.54 0.04 0.015 79 35 2 走向20° - 透镜状 1.86 0.03 0.020 81 37 2 205° 74° 透镜状 1.58 0.020 0.002 82 20 2 走向300° - 透镜状 1.61 0.06 0.022 83 20 2 255° 71° 透镜状 1.49 0.080 0.010 84 160 4.5 210° 76° 脉状 1.21 0.061 0.020 85 50 5.8 250° 73° 透镜状 1.82 0.054 0.020 87 150 8 270° 80° 脉状 1.82 0.048 0.016 90 80 2~4 357° 74° 脉状 1.55 0.060 0.021 注: “-”为无数据。 
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