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黄金科学技术 ›› 2022, Vol. 30 ›› Issue (6): 822-834.doi: 10.11872/j.issn.1005-2518.2022.06.185

• 矿产勘查与资源评价 • 上一篇    

元素比值在嫩江—黑河地区金成矿预测的应用初探

符安宗1(),余欣朗2,李成禄1,杨文鹏1,杨元江1,郑博1,赵瑞君1   

  1. 1.黑龙江省自然资源调查院,黑龙江 哈尔滨 150036
    2.黑龙江省地质矿产实验测试研究中心,黑龙江 哈尔滨 150036
  • 收稿日期:2021-11-29 修回日期:2022-05-14 出版日期:2022-12-31 发布日期:2023-01-06
  • 作者简介:符安宗(1986-),男,广西浦北人,工程师,从事区域地质矿产调查与研究工作。116861157@qq.com
  • 基金资助:
    黑龙江省重点研发计划项目“黑龙江省大型二道坎银矿资源综合利用及成矿作用研究”(GA21A204);黑龙江省国土资源科研项目“黑龙江省嫩江—黑河构造混杂岩地区成矿规律研究与找矿预测”(201603)

Application of Element Ratios in Gold Metallogenic Prediction in Nenjiang-Heihe Area

Anzong FU1(),Xinlang YU2,Chenglu LI1,Wenpeng YANG1,Yuanjiang YANG1,Bo ZHENG1,Ruijun ZHAO1   

  1. 1.Heilongjiang Institute of Natural Resources Survey, Harbin 150036, Heilongjiang, China
    2.Heilongjiang Provincial Geology and Mineral Resources Test and Application Institute, Harbin 150036, Heilongjiang, China
  • Received:2021-11-29 Revised:2022-05-14 Online:2022-12-31 Published:2023-01-06

摘要:

为探讨元素比值在金成矿预测中的应用,在收集嫩江—黑河地区1/25万区域化探数据的基础上,对数据进行标准化处理,计算Au元素与前缘晕元素和尾晕元素的比值,以及前缘晕元素与尾晕元素的比值。以(0.1~0.2)lgC对数间距绘制地球化学等值线图,分析Au元素和特征元素比值的分布特征,结合已有金矿的分布规律圈定找矿靶区。结果表明:经标准化消除量纲后,特征元素比值的平均值分布区间范围为0.60~15.58,相差不大,便于统计分析和勾绘地球化学等值线图。根据已有金矿在Au元素和特征元素比值地球化学等值线图上的分布特征,共圈定出7个成矿靶区。研究表明:将元素比值应用于金成矿预测中,取得了良好的效果,这为嫩江—黑河地区寻找金矿提供了科学依据,为区域找矿研究提供了新思路。

关键词: 元素比值, 金矿, 成矿预测, 地球化学方法, 区域找矿, 嫩江—黑河地区

Abstract:

In order to explore the application of element ratio in gold metallogenic prediction,based on the collection of 1∶250 000 regional geochemical exploration data in Nenjiang-Heihe area,the data were standardized with the abundance of upper crust,and the ratios of Au to front halo elements and tail halo elements and the ratios of front halo elements to tail halo elements were calculated.Then,the geochemical parameters of each element and the ratios of characteristic elements were counted,their geochemical characteristics were analyzed.The geochemical contour map of Au and the ratios of characteristic elements at a logarithmic interval of (0.1~0.2) lgC was drawn,and the distribution characteristics of them were summarized.Finally,combined with the distribution law of existing gold deposits and the distribution characteristics of gold deposits on the geochemical isoline map of various variables,we delineated the prospecting target area.The results show that after the dimensionality is eliminated by standardization,the average value range of characteristic element ratios is 0.60~15.58,with little difference,which is convenient for statistical analysis and geochemical isoline drawing.And the spatial distribution characteristics of characteristic element ratios are closely related to the distribution of existing gold deposits.Their high background and high value areas have obvious northeast and northwest distribution trends,and some have north-south and east-west distribution trends,it is consistent with the distribution direction of existing gold mines.According to the distribution characteristics of existing gold deposits on the geochemical contour map of Au and the ratios of the characteristic element,a total of 7 metallogenic targets are delineated.The study shows that the element ratio has achieved a certain effect in the prediction of gold mineralization,which provides a scientific basis for the search for gold deposits in Nenjiang-Heihe area and a new idea for the study of new prospecting methods.

Key words: element ratio, gold mine, metallogenic prediction, geochemical method, regional prospecting, Nenjiang-Heihe area

中图分类号: 

  • P618.51

图1

嫩江—黑河地区区域地质矿产简图(据杨福深等,2019修改)1.中—新生代沉积岩;2.新生代火山岩;3.中生代火山沉积岩;4.上古生界;5.中古生界;6.下古生界;7.新元古界;8.古—中元古界;9.晚中生代花岗岩;10.晚中生代闪长岩;11.中中生代花岗岩;12.早中生代花岗岩;13.早中生代闪长岩;14.早中生代超基性岩;15.晚古生代花岗岩;16.晚古生代正长岩;17.晚古生代闪长岩;18.中古生代花岗岩;19.早古生代花岗岩;20.早古生代蛇纹岩;21.新元古代片麻状花岗岩;22.古—中元古代(混合)花岗质片麻杂岩;23.韧性推(滑)覆断裂;24.大型左行走滑断裂;25.重力解译推断岩石圈断裂;26.航磁、遥感解译推断基底断裂;27.实测、推测断裂;28.典型铜(金银)矿床"

表1

嫩江—黑河地区1/25万化探地球化学参数统计"

元素

(氧化物)

算术均值均方差变化系数

上地壳

丰度

浓度克拉克值

元素

(氧化物)

算术均值均方差变化系数上地壳丰度浓度克拉克值
Au1.6628.8017.320.742.25Mn1 125.671 606.131.435751.96
Ag0.060.050.830.0551.03Nb8.335.350.64120.69
As12.1020.881.731.96.37Ni12.8517.161.34240.54
Sb0.581.101.890.183.22P676.17729.731.085901.15
Bi0.160.332.080.131.21Pb22.9417.920.78171.35
Hg0.030.239.240.00783.22Sr263.57174.050.663300.80
W0.951.201.270.91.05Th5.392.760.518.60.63
Mo1.121.321.180.61.87Ti2 149.511 940.770.903 0000.72
F273.69193.070.715400.51V58.4858.901.01680.86
Cd0.060.081.230.0720.88Y12.417.850.63170.73
Sn1.640.940.571.51.09Zn35.3027.800.79600.59
B14.1816.211.14170.83Zr132.9892.370.691620.82
Li15.5210.840.70160.97SiO272.007.760.1161.771.17
Be1.890.710.381.61.18Al2O311.862.490.2113.610.87
U1.390.870.621.50.93TFe2O33.603.300.914.780.75
Ba703.68317.220.457400.95K2O3.140.850.273.061.03
Co16.4722.991.40121.37Na2O2.200.960.432.960.74
Cr23.6333.891.43520.45CaO1.110.910.825.60.20
Cu10.3447.924.63180.57MgO0.660.711.082.730.24
La18.1110.420.58350.52

表2

嫩江—黑河地区特征元素比值地球化学参数统计"

特征元素比值算术均值均方差

变化

系数

特征元素比值算术均值均方差变化系数
Au/As0.604.817.96As/Ni15.5818.091.16
Au/Sb1.0117.7117.61Sb/Bi3.014.231.41
Au/Hg1.8664.9534.87Sb/Mn2.644.651.76
Au/Bi1.9824.6712.46Sb/Co3.575.081.42
Au/Mn2.2830.1213.20Sb/Ni8.8513.701.55
Au/Co3.1747.0914.87Hg/Bi3.8632.508.43
Au/Ni7.1790.3712.61Hg/Mn4.5932.477.07
As/Bi6.017.961.33Hg/Co5.8647.958.19
As/Mn4.355.551.28Hg/Ni13.1579.956.08
As/Co6.077.811.29

图2

嫩江—黑河地区1/25万化探Au、Au/As、Au/Hg、Au/Bi、Au/Mn、Au/Co地球化学图1-争光金矿;2-三道湾子金矿;3-上马场金矿;4-孟德河金矿;5-永新金矿;6-科洛金矿;7-三合屯金矿1.金矿化点;2.金矿点;3.小型金矿床;4.中型金矿床;5大型金矿床;6.靶区及编号"

图3

嫩江—黑河地区1/25万化探As/Bi、As/Mn、As/Co、As/Ni、Sb/Bi、Sb/Mn地球化学图1-争光金矿;2-三道湾子金矿;3-上马场金矿;4-孟德河金矿;5-永新金矿;6-科洛金矿;7-三合屯金矿1.金矿化点;2.金矿点;3.小型金矿床;4.中型金矿床;5.大型金矿床;6.靶区及编号;7.环带及编号"

图4

嫩江—黑河地区1/25万化探Sb/Co、Sb/Ni、Hg/Bi、Hg/Mn、Hg/Co、Hg/Ni地球化学图1-争光金矿;2-三道湾子金矿;3-上马场金矿;4-孟德河金矿;5-永新金矿;6-科洛金矿;7-三合屯金矿1.金矿化点;2.金矿点;3.小型金矿床;4.中型金矿床;5.大型金矿床;6.靶区及编号;7.环带及编号"

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