卤水型锂资源勘查开发综合评价指标体系构建与应用

CONSTRUCTION AND APPLICATION OF COMPREHENSIVE EVALUATION INDEX SYSTEM OF BRINE LITHIUM RESOURCES EXPLORATION AND DEVELOPMENT

基于指标选择的系统性、可得性、易操作性原则,从影响卤水型锂矿床的地质条件、开采条件、社会经济条件和环境约束条件4个方面优选“成矿地质条件”“卤水Mg/Li比值”等19项具有代表性的评价指标,首次构建了一套卤水型锂资源勘查开发综合评价指标体系,可为同类型矿床勘查开发综合评价提供一定的思路和借鉴。运用层次分析法确定指标权重,结合初步确定的各指标参考评价标准,对西藏扎布耶盐湖等5个典型卤水型锂矿床的勘查开发条件进行综合评价,认为影响卤水型锂资源勘查开发的首要因素是地质条件,反映在矿区卤水型锂资源的地质特征、水化学特征和资源禀赋等方面,次要因素是环境约束条件和社会经济条件。柴达木盆地一里坪盐湖的卤水型锂资源勘查开发优势度得分最高,为87.69,其次依次为:察尔汗盐湖别勒滩矿段,得分87.50;西藏扎布耶盐湖,得分85.02;江汉盆地江陵凹陷,得分73.53;马海盐湖,得分56.96。评价结果反映了当前经济社会形势下卤水型锂矿床勘查开发利用的实际情况,可作为卤水型锂资源勘查、投资开发和国民经济发展规划等工作的重要依据,同时验证了评价模型的可操作性和评价方法的可行性。

This paper,based on principles of systematicness,accessibility and easy operability of indicators selection,selects 19 indicators including Mg/Li in mineralization conditions of brine lithium deposits from geology,mining,economics and environmental constraints to establish a comprehensive evaluation index system of brine lithium resource exploration and development,which can offer references for comprehensively evaluating the same kind of lithium deposit exploration and development.Analytical Hierarchy Process(AHP)used to give weights to indicators is applied to evaluate the exploration and development conditions of five brine lithium deposits in Tibet,including Zhabuye saline.The primary factor impacting exploration and development of brine lithium deposits is geology,characterized by their geology,water chemistry and resources occurrence,followed by the secondary factors environmental constraints and economy.Yiliping saline brine lithium resource in Qaidam basin has a highest score in exploration and development,at 87.69,followed by Bieletan district in Qarhan saline at 87.50,then by Zhabuye saline in Tibet at 85.02,Jiangling depression in Jianghan basin at 73.53,and Mahai saline at 56.96.This evaluation which has been validated by its operability and feasibility,reveals the reality of brine lithium deposit exploration and development under the current economic situation,which offers references for brine lithium resources exploration,investment and development and for economic planning.