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黄金科学技术 ›› 2020, Vol. 28 ›› Issue (6): 837-845.doi: 10.11872/j.issn.1005-2518.2020.06.084

• 矿产勘查与资源评价 • 上一篇    下一篇

青海省都兰县丘吉东沟金矿水系沉积物地球化学特征及找矿远景

刘铭1(),王仔章2()   

  1. 1.山东省鲁南地质工程勘察院(山东省地勘局第二地质大队),山东 济宁 272000
    2.河南中核五院研究设计有限公司,河南 郑州 450000
  • 收稿日期:2020-05-02 修回日期:2020-07-28 出版日期:2020-12-31 发布日期:2021-01-29
  • 通讯作者: 王仔章 E-mail:1290278570@qq.com;zizhangwang@163.com
  • 作者简介:刘铭(1969-),男,山东济宁人,工程师,从事区域地质矿产调查和矿产勘查工作。1290278570@qq.com
  • 基金资助:
    新理论支撑右江成矿带锡钨金找矿勘查

Geochemical Characteristics of Stream Sendiments and Exploration Prospective of the Qiujidonggou Gold Deposit in Dulan County,Qinghai Province

Ming LIU1(),Zizhang WANG2()   

  1. 1.Shandong Lunan Institute of Geo-Engineering Exploration (No. 2 Geological Team,Shandong Geological Prospecting Bureau of Geology & Mineral Resources),Jining 272000,Shandong,China
    2.Henan Fifth Research & Design Corporation of CNNC,Zhengzhou 450000,Henan,China
  • Received:2020-05-02 Revised:2020-07-28 Online:2020-12-31 Published:2021-01-29
  • Contact: Zizhang WANG E-mail:1290278570@qq.com;zizhangwang@163.com

摘要:

都兰县丘吉东沟金矿区位于东昆仑成矿省,具有良好的成矿地质背景。由于矿区面积较大,区内成矿的有利部位难以圈定,从而限制了矿山的找矿与开采工作。为了揭露研究区矿体的成矿特征及找矿方向,通过对青海省都兰县丘吉东沟金矿开展1∶25 000水系沉积物地球化学特征研究,探讨矿床成矿特征并圈定成矿靶区。通过开展水系沉积物研究发现:Ag、Pb、As和Sb元素与成矿元素相关性较高,可作为成矿的指示性元素;运用衬度异常圈定法,在研究区圈定了4个综合异常区,其中Ⅰ级异常1处,为AS-4号综合异常;Ⅱ级异常2处,分别为AS-1和AS-3号综合异常;Ⅲ级异常1处,为AS-2号综合异常。研究结果将为区域找矿理论研究和找矿方向提供依据。

关键词: 水系沉积物, 地球化学特征, 衬度异常圈定法, 东昆仑成矿省, 丘吉东沟金矿, 青海省

Abstract:

The Qiujidonggou gold deposit in Dulan County is located in the middle of the east Kunlun metallogenic province,so it is necessary to carry out research on the reverse side of mineral exploration.The area has developed structures,frequent research activities,and a good metallogenic geological background.There are famous Wulonggou gold deposit and Tanjianshan gold deposit around the mine.Due to the good metallogenic background in this area,the area has attracted the attention of scholars at home and abroad.Most of the previous studies have focused on the geological characteristics of the deposits and the metallogenic age,and there are few studies on regional mineral exploration,which has led to no breakthrough in regional prospecting. Because the mining area is large and the coverage is serious,general physical and chemical exploration methods are difficult to meet the exploration needs,which limits the prospecting and mining work of the mine.In order to reveal the metallogenic characteristics of the ore bodies in the study area and the prospecting direction,this paper explores the 1∶25 000 water system sediments in the Qiujidonggou gold deposit,to explore the mineralization characteristics and delineation of the deposit mine target area.Through research,it is found that the four elements Ag,Pb,As and Sb are highly correlated with metallogenic elements and can be used as indicator elements for metallogenic.Using the method of contrast anomaly delineation,four comprehensive anomalies were delineated in the study area.One type I anomaly is the AS-4 comprehensive anomaly and the second type anomaly is the AS-1 and AS-3 anomalies,third type anomaly is the AS-2 anomalies.This will provide a theoretical basis for the theoretical research and prospecting direction of regional prospecting.

Key words: stream sediment survey, geochemical characteristics, contrast anomaly delineation method, east Kunlun metallogenic province, Qiujidonggou gold deposit, Qinghai Province

中图分类号: 

  • P632

图1

都兰县丘吉东沟金矿区域地质简图Ⅰ-秦祁昆地层区:Ⅰ1-北祁连山分区;Ⅰ2-中祁连山分区;Ⅰ3-南祁连山分区;Ⅰ4-拉脊山分区;Ⅰ5-柴达木北缘分区;Ⅰ6-柴达木盆地分区;Ⅰ7-柴达木南缘分区;Ⅰ8-东昆仑山南坡分区;Ⅰ9-宗务隆—泽库分区;Ⅰ10-西倾山分区;Ⅱ-巴颜喀拉—羌北地层区:Ⅱ1-阿尼玛卿山分区;Ⅱ2-巴颜喀拉山分区;Ⅱ3-西金乌兰—玉树分区;Ⅱ4-乌丽—杂多分区;Ⅱ5-赤布张错—雁山坪分区;Ⅲ-羌南—保山地层区:Ⅲ1-索县—左贡分区"

图2

丘吉东沟金矿区水系沉积物元素异常区及采样位置图Jxl2-蓟县纪狼牙山组中段硅质条带白云岩;Jxl1sl1-蓟县纪狼牙山组下段板岩夹层;Ar3Pt1b1-新太古代—古元古代白沙河组灰黑色斜长角闪岩;P3oγ-晚二叠世灰色中细粒英云闪长岩;C1γa-早石炭世肉红色中细粒花岗岩;D1γ-早泥盆纪肉红色中细粒花岗岩;S4εγ-晚志留纪肉红色中粗粒正长花岗岩;Q4-第四系;1.异常范围;2.金矿点;3.铅锌银矿点;4.采样点"

表1

研究区水系沉积物元素异常下限计算结果"

元素对数 平均值对数 标准差对数异常下限异常下限反算全区元素均值最终异常下限
Au0.030.220.472.351.412.30
Ag-1.200.14-0.920.110.070.15
Cu1.380.201.7855.5226.7855.00
Pb1.230.111.4525.9717.3828.00
Zn1.810.142.09110.0067.20105.00
As1.060.181.4222.5112.4322.00
Sb0.030.140.311.881.131.80
Hg-1.710.26-1.190.060.020.05
W0.170.190.553.011.623.00
Sn0.460.110.684.442.994.40
Mo0.030.180.392.281.182.30
Ni1.470.171.8158.2331.8658.00
Bi-0.610.15-0.310.430.260.43
V1.930.142.21151.3688.91150.00
Co1.080.161.4023.5012.9524.00
Ti3.520.173.866 384.113 569.396 300.00
Cd-0.720.160.400.360.200.35
Ba2.690.142.97881.79512.35880.00
Te-1.210.14-0.930.100.060.09
Y1.390.111.6137.2425.1738.00

表2

水系沉积物地球化学异常特征组合基本地球化学参数统计"

异常编号异常元素异常点数

异常下限

T

峰值

Cmax

异常均值

Caˉ

标准离差

δ

面积(S) /km2

衬度

K==CaˉT

异常规模

D=K·S

AS-1Mo262.305.12.720.550.450.750.34
Cd170.351.200.480.080.380.800.30
Te140.090.140.110.020.200.810.16
Cu1155.00118.0063.8814.370.0380.800.03
Au112.303.002.760.570.0630.770.05
AS-2Mo202.305.402.650.550.921.151.06
Sb161.802.701.810.380.561.010.57
As2222.00126.0044.155.041.942.013.90
Au152.306.402.750.571.191.201.43
Ag80.150.230.180.020.731.200.88
Bi90.431.300.680.090.681.581.07
W143.0022.24.670.690.571.560.89
Cd140.350.620.430.081.231.231.51
Pb1328.0052.334.594.291.221.241.51
Zn4105.00112.00105.521.400.021.010.02
Sn34.405.505.070.730.421.150.48
AS-3Au102.3039.15.430.550.612.361.44
As922.00497.0072.015.040.643.272.09
Hg110.050.700.150.020.583.001.74
Sb11.802.302.300.380.0141.280.02
Cu1655.0092.462.6814.370.341.140.39
Co1624.0038.0029.35.280.601.220.73
Ni1658.0097.1068.2513.180.5631.180.66
Ti246 300.008 894.007 108.251 407.360.541.130.61
V18150.0220.00162.2731.230.331.080.36
AS-4Au82.305.603.450.550.491.800.88
Ag320.1513.100.850.021.155.676.52
Pb3428.00769.0069.164.291.312.473.24
Zn18105.00309.00122.1621.401.041.161.21
W533.0071.306.540.692.062.184.49
Mo152.309.303.210.550.451.400.63
Cu355.00154.00100.7314.370.161.830.30
Sb121.8010.22.930.380.671.631.09
Cd360.352.600.740.081.712.113.61
Ni358.00136.0088.7313.180.111.530.17
As622.00110.0048.385.040.652.201.43
Sn24.45.35.20.730.041.180.05

图3

研究区水系沉积物异常解析图(a)(b)(c)AS-3;(d)(e)AS-4;(f)(g)AS-1;(h)(i)AS-2"

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