Geochemical characteristics of stream sediments and prospecting orientation in the periphery of the Zankan iron ore deposit, Taxkorgan, Xinjiang
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摘要:
通过塔什库尔干县赞坎铁矿外围地区水系沉积物地球化学特征及其元素相关性的研究表明,元素(地球化学)异常(高值区)严格受塔阿西-色克布拉克断裂带,以及泥盆纪地层、热液活动、岩脉等因素联合控制。根据异常特征与成矿地质条件,圈定了4处成矿远景区,即赞格尔铅银钨多金属成矿远景区(Ⅰ1)、西若钨锡钼铜多金属成矿远景区(Ⅱ2)、盖家克铬镍铜金多金属成矿远景区(Ⅱ3)和哈尼沙里地金多金属成矿远景区(Ⅱ4),为下一步找矿工作指明了方向。
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关键词:
- 赞坎铁矿 /
- 塔阿西-色克布拉克断裂带 /
- 水系沉积物 /
- 成矿远景区
Abstract:In this paper, the authors report the geochemical prospecting results around the margins of the Zankan iron deposit and discussed the relationship between elements as well as their coupling with the regional geology. Studies reveal that the geochemical anomalies are obviously constrained by the Taaxi-Sekebulake fault, the lithology of Devonian strata and the igneous activities. According to the features of the geochemical anomalies, in combination with regional geology, the authors delineated four ore prospecting areas, i.e., the Zanger Pb-Ag-W prospective area, the Xinuo W-Sn polymetallic prospective area, the Gaijiake Cr-Ni-Cu prospecting area, and the Halishali Au polymetallic prospective area. The results point out the prospecting locations in the feature.
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Key words:
- Zankan iron deposit /
- Taaxi-Sekebulake fault /
- stream sediments /
- prospective area
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表 1 异常个数统计
Table 1. Geochemical anomalies of stream sediments in the adjacent areas of the Zankan iron ore deposit
元素 异常下限 个数 元素 异常下限 个数 Au 2.8 44 Ni 90 15 Ag 0.2 16 Co 37 14 Cu 80 26 Sb 1.5 18 Pb 77 15 As 39 35 Zn 150 13 Bi 1.5 34 Sn 5 20 W 6 31 Cr 150 14 Mo 5.5 33 Cd 0.04 21 注:Au元素含量为10-9,其他元素含量为10-6 表 2 赞坎铁矿区外围1:5万水系沉积物测量元素背景统计
Table 2. Geochemical background values of stream sediments in the adjacent areas of the Zankan iron ore deposit
元素 样品数 平均值(X) 中位数(M) 标准离差(S) 变化系数(Cv) 最大值 最小值 浓集克拉克值(C) 丰度 Cr 2991 50.044 42.4 33.55 0.67 156 5 0.794 110 Au 2908 1.067 0.9 0.648 0.607 3.5 0.2 0.26 3.5 Ni 2989 28.869 23.8 20.342 0.705 93.2 1 0.506 89 Pb 2828 20.754 14.4 18.798 0.906 115 2.4 1.384 12 As 2934 10.891 8.1 9.159 0.841 43.1 0.54 5.732 2.2 Sb 2918 0.489 0.4 0.324 0.662 1.7 0.06 3.263 0.6 Cu 3011 28.733 25.5 19.278 0.671 88.7 1.8 0.756 63 W 2929 1.805 1.5 1.083 0.6 6.1 0.19 0.752 1.1 Sn 2950 2.314 2.2 0.845 0.365 5.1 1 0.564 1.7 Zn 3045 62.075 63.5 28.788 0.464 148 5 0.722 94 Ag 2943 0.055 0.047 0.027 0.491 0.15 0.02 0.001 0.08 Co 2981 14.322 13.2 8.392 0.586 40.9 1 0.448 25 Mo 2886 1.562 1.1 1.3 0.833 6.6 0.11 0.781 1.3 Bi 2889 0.411 0.31 0.33 0.802 1.8 0.04 3.237 0.17 Cd 2878 0.014 0.013 0.007 0.514 0.042 0.001 0.26 0.2 -
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