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成矿体系理论在加达超大型锂矿靶区圈定及找矿突破中的应用
Application of mineralization system theory in target delineation and prospecting breakthrough of Jiada super-large lithium deposit
【摘要】 四川加达超大型锂矿仅用一年多时间便完成0—80线勘探,达到了超大型规模,并于2025年6月通过自然资源部评审备案。该矿床的找矿突破并非一年内一蹴而就,而是长期理论指导实践的具体体现,尤其是以成矿系列为核心的成矿体系理论贯彻始终。首先,全面厘定伟晶岩型锂矿成矿系列,将锂矿的成矿系列作为构建锂矿成矿体系的基本单元,在中国锂矿找矿部署中发挥基础指导作用;其次,将成矿区带作为锂矿成矿体系的载体,并将西昆仑-松潘-甘孜造山带作为工作重点,依托各类项目形成“理论-调查-突破-基地”全链条找矿突破新思路;将西昆仑-松潘-甘孜“亚洲锂腰带”的东部矿集区作为重点,在甲基卡老矿区“就矿找矿”取得找矿突破之后,以可尔因东部空白区为切入点,按照“全位成矿+缺位找矿”理念圈定加达远景区,通过绿地调查将其与党坝整合为加达-党坝锂矿田。应用潜力评价八步骤,结合“五层楼+地下室层脉组合”勘查模型,依据加达矿区岩浆-热穹隆构造背景与背斜构造特征,明确脉状与层状矿体耦合关系,指导隐伏矿体定位预测;依据地球物理和地球化学异常既是成矿的显示也是成矿体系的组成部分的基本定位,将高密度电法与锂同位素技术结合起来,作为圈定伟晶岩型锂矿体与勘探工作部署的依据,及时优化调整了钻探工作,推动矿床规模从大型(预期)升至超大型。加达超大型锂矿的发现,是成矿体系理论与新技术方法融合应用的典型案例,矿区Li2O资源有望扩大到百万吨级规模,对中国新一轮找矿突破战略行动具有重要理论与实践参考价值。
【Abstract】 The exploration plogram at the super-large Jiada lithium deposit in Sichuan completed the exploration of Lines 0-80 in just over a year, attaining super-large scale and passing the review and filing by the Ministry of Natural Resources in June 2025. The prospecting breakthrough of this deposit was not achieved overnight within a year, but a concrete manifestation of long-term theoretical guidance for practice—especially the consistent implementation of the mineralization system theory centered on mineralization series. Firstly, the mineralization series of pegmatite-type lithium deposits was fully defined, and regarded as the basic unit for constructing the lithium mineralization system, this series has played a fundamental guiding role in the national lithium prospecting deployment. Secondly, mineralization belts were taken as the carrier of the lithium mineralization system, with the West Kunlun-Songpan-Garzê orogenic belt being identified as the key work area. Relying on various projects, a new full-chain prospecting breakthrough idea of “Theory-Investigation-Breakthrough-Base” was formed. Focusing on the eastern ore concentration area of the “Asian Lithium Belt” in the West Kunlun-Songpan-Garzê region,after achieving prospecting breakthroughs through “prospecting around existing deposits” in the old Jiajika mining area, the Jiada prospect area was delineated in the blank eastern area of the Ke’eryin based on the concept of“omnidirectional metallogenesis + vacant-position prospecting”. Through greenfield surveys, it was integrated with Dangba to form the Jiada-Dangba lithium ore field. The eight-step potential evaluation method was applied,and combined with the “five-story building + basement layer-vein assemblage” exploration model. Based on the magmatic-thermal dome structural setting and anticline structural characteristics of the Jiada area, the coupling relationship between vein-type and layered orebodies was clarified to guide the positioning prediction of concealed orebodies. Adhering to the basic positioning that geophysical and geochemical anomalies are both manifestations of mineralization and components of the mineralization system, high-density electrical method was combined with lithium isotope technology as the basis for delineating pegmatite-type lithium orebodies and deploying exploration work. Drilling operations were promptly optimized and adjusted, advancing the deposit scale from a projected large-sized category to a super-large-sized one. The discovery of the super-large Jiada lithium deposit is a typical case of the integrated application of mineralization system theory and new technologies/methods. The Li2O resources in the depost area are expected to reach the million-ton scale, providing important theoretical and practical reference value for China’s new round of Prospecting Breakthrough Strategic Action.
【Key words】 mineralization system theory; “five-story building + basement”model; high-density electrical method; lithium isotope; super-large deposit; pegmatite-type lithium deposit; Jiada lithium deposit;
- 【文献出处】 矿床地质 ,Mineral Deposits , 编辑部邮箱 ,2026年03期
- 【分类号】P618.71
- 【下载频次】45