Characteristics of Soil Geochemistry and Its Prospecting Significance in Liemen Area, Jinchuan County, Sichuan
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摘要:
列门地区位于川西晚三叠世马尔康-金川超大型锂多金属成矿区内，区内已发现多处中型、超大型花岗伟晶岩型锂多金属矿床，成矿条件优越。通过1:1万土壤地球化学调查，分析了列门地区6种与稀有金属成矿密切相关元素的地球化学特征，统计了元素的变异系数、富集系数，发现Li为主成矿元素。在此基础上，圈定了单元素异常和5处综合异常。异常查证发现了5条锂矿（化）体，为进一步的勘查工作提供了依据。
Abstract:Liemen area is located in Late Triassic Markam-Jinchuan super-large-scale lithium polymetallic ore-forming area in western Sichuan, where many middle-scale and super-large-scale granite pegmatite-type lithium ore deposits have been found and polymetallic conditions are Favorable. Based on a 1:10000 soil geochemistry survey, the characteristics of six elements closely related to the mineralization of rare metals were analyzed, and the variation coefficient and enrichment coefficient of the elements were calculated. It is found that Li is the main ore-forming element. On this basis, the single element anomaly and 5 synthetic anomalies are delineated. Five lithium ore bodies were found in the anomaly investigation, which provided the basis for further exploration.
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表 1 列门地区土壤地球化学特征参数
Table 1. Soil geochemistry characteristic parameters in Liemen area
元素 最大值 最小值 平均值 中位数 标准差 变异
系数富集
系数全国土壤地球化
学背景基准值[12]Li 1400 39.4 112.53 97.95 64.73 1.28 3.70 30 Be 19.40 1.73 2.86 2.65 1.10 1.67 1.38 2 Rb 259 71.2 135.93 132 21.08 1.02 1.41 96 Cs 130 8.77 28.63 25.5 14.09 1.08 4.70 6 Nb 29 10.50 16.31 16.00 2.86 1.00 1.25 13 Ta 4.82 0.70 1.30 1.18 0.44 1.37 1.26 1.0 注：元素单位为×10−6 
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表 2 列门地区元素异常下限值统计
Table 2. Statistical table of elemental threshold in Liemen area
元素 样品数 异常下限 元素 样品数 异常下限 计算值 使用值 计算值 使用值 Li 1014 160.82 160 Nb 1016 19.17 19.0 Be 1000 3.39 3.40 Ta 1002 1.57 1.60 Cs 1011 41.04 40.0 Rb 1015 156.55 160
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