印度尼西亚苏门答腊岛低密度地球化学填图

为了快速获取印度尼西亚苏门答腊岛元素分布的详细情况，根据苏门答腊岛的地形及景观特征，以水系沉积物和土壤为采样介质，实施了覆盖全岛的1：100万低密度地球化学填图。详细介绍了1：100万低密度地球化学填图的野外工作方法、测试的元素及分析技术，根据测试结果制作了苏门答腊岛69种元素地球化学图，计算和分析了苏门答腊岛地球化学背景的特征参数。总结了苏门答腊岛不同成因类型组合元素的分布特征及规律，圈定了16处地球化学综合异常。结合主因子综合异常特征以及区内典型矿床(点)空间分布、规模，对苏门答腊岛主成矿元素综合异常进行了甲、乙、丙分类，包括6个甲级综合异常、4个乙级综合异常和6个丙级综合异常，并优选3处具有较好找矿潜力的甲级综合异常进行异常解释和讨论，认为HS7综合异常具有寻找SEDEX型铅锌矿的潜力，HS8和HS11综合异常具有寻找浅成低温热液型金银矿和矽卡岩型铜铅锌矿床的潜力，为苏门答腊岛深入开展矿产勘查提供参考和依据。

Low-density geochemical mapping in Sumatra of Indonesia

In order to quickly obtain the detailed elemental distribution of Sumatra, Indonesia, a low-density geochemical mapping was conducted at a scale of 1:1000000 using stream sediment and soil as the sampling media based on the topographical and landscape features of Sumatra. The field sampling methods, elements to be determined, and analytical methods for the low-density geochemical mapping of Sumatra were discussed. Sixty-nine element geochemical maps were compiled based on the sample data, and the characteristic parameters of the geochemical background throughout Sumatra were calculated and evaluated. The distribution characteristics and regularities of combined elements of different genetic types were summarized, and sixteen geochemical comprehensive anomalies were delineated. Combined with the comprehensive anomaly characteristics of the main factors and the spatial distribution and scale of typical deposits ( points ) in the area, the comprehensive anomalies were classified into six A-level comprehensive anomalies, four B-level comprehensive anomalies, and six C-level comprehensive anomalies. Additionally, three comprehensive anomalies with good prospecting potential were selected for anomaly interpretation and discussion. It is considered that the HS7 comprehensive anomaly has the potential to discover SEDEX lead-zinc deposits, and the HS8 and HS11 comprehensive anomalies have the potential to discover epithermal gold-silver deposits and skarn copper-lead-zinc deposits, which provides an important reference and basis for further mineral exploration in Sumatra.