Application of H2S and SO2 gas geochemical measurements in the Pulang porphyry copper deposit, Yunnan Province
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摘要:
鉴于覆盖区找矿信息的识别和提取难度大，在覆盖区寻找斑岩铜矿面临巨大困难和挑战。斑岩铜矿中的矿体以低品位的金属硫化物为主，是否可以形成气体异常并确定矿体的延伸情况有待进一步研究。利用便携式气体快速分析仪在普朗斑岩铜矿区开展了H2S和SO2气体地球化学测量试验性研究。结果表明铜矿体上方可以形成很好的H2S和SO2气体地球化学异常，说明该方法能够揭示深部隐伏矿体等有效信息，通过异常在空间上的分布情况能够推测矿体在走向和倾向的延伸方向。二者协同性较好、浓度异常分布较为连续的部位具有很好的找矿潜力，是一种非常适合覆盖区斑岩铜矿矿产勘查的有效工作手段，为隐伏矿产勘查提供了新思路和新方法。
Abstract:Given the difficulty in identifying and extracting exploration information in covered areas, the search for porphyry copper deposits faces significant challenges.
Objective The ore bodies in porphyry copper deposits are primarily low-grade metal sulfides, and further research is needed to determine the depth and extent of these deposits via gas geochemistry.
Methods Preliminary experiments were conducted in this study using a portable gas analyzer for H2S and SO2 geochemical measurements at the Pulang porphyry copper deposit.
Results The results indicate significant H2S and SO2 geochemical anomalies above copper mineralization, suggesting the method's efficacy in revealing hidden ore bodies and predicting their strike and dip extensions.
Conclusion Areas showing good synergistic behavior, continuous anomalous concentration distributions, and potential for mineralization are promising targets for exploration. This approach represents an effective method for mineral exploration in covered porphyry copper deposits, offering new insights into prospecting concealed mineral resources.
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图 1 普朗铜矿大地构造位置(a)和区域地质图(b)
Figure 1. Tectonic location (a) and regional geological map (b) of the Pulang copper deposit
图 2 普朗KT1号铜矿地质图及测试点位
Figure 2. Geological map and test points of the ore body KT1 in the Pulang copper deposit
图 3 普朗铜矿H2S (a)和SO2 (b)气体地球化学数据直方图
Figure 3. Histograms of H2S (a) and SO2 (b) gas geochemical data for the Pulang copper deposit
图 4 普朗矿区22号勘查线H2S和SO2气体地球化学剖面图
虚线为超过4倍异常值的下限线，用于去除特高值影响，下同
Figure 4. Geochemical profiles of H2S and SO2 gas from exploration line 22 in the Pulang copper deposit
图 5 普朗矿区14号勘查线H2S和SO2气体地球化学剖面图
Figure 5. Geochemical profiles of H2S and SO2 gas from exploration line 14 in the Pulang copper deposit
图 6 普朗矿区15号勘查线H2S和SO2气体地球化学剖面图
Figure 6. Geochemical profiles of H2S and SO2 gas from exploration line 15 in the Pulang copper deposit
图 7 普朗矿区23号勘查线H2S和SO2气体地球化学剖面图
Figure 7. Geochemical profiles of H2S and SO2 gas from exploration line 23 in the Pulang copper deposit
图 8 普朗矿区H2S(a)和SO2(b)气体地球化学平剖图
Figure 8. Geochemical profile-plain of H2S (a) and SO2 (b) gas in the Pulang copper deposit
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