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黄金科学技术 ›› 2022, Vol. 30 ›› Issue (5): 651-663.doi: 10.11872/j.issn.1005-2518.2022.05.173

• 矿产勘查与资源评价 •    下一篇

岩屑地球化学测量在黑龙江省三道湾子浅覆盖区的找矿应用效果

张玉鹏1(),史冬岩2,3,4,吕明奇1,李成禄1(),张坤2,唐伟1   

  1. 1.黑龙江省自然资源调查院,黑龙江 哈尔滨 150036
    2.黑龙江省矿业集团有限责任公司,黑龙江 哈尔滨 150090
    3.吉林大学地球科学学院,吉林 长春 130061
    4.中国科学院地球化学研究所,贵州 贵阳 550081
  • 收稿日期:2021-12-01 修回日期:2022-05-29 出版日期:2022-10-31 发布日期:2022-12-10
  • 通讯作者: 李成禄 E-mail:yupeng0310@163.com;lcl230881@163.com
  • 作者简介:张玉鹏(1985-),男,河北邯郸人,高级工程师,从事地质矿产勘查工作。yupeng0310@163.com
  • 基金资助:
    黑龙江省重点研发计划“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);黑龙江三道湾子金矿有限公司科研项目“黑龙江省黑河市三道湾子岩金矿普查”(编号:2019—2020年度)和黑龙江省总工会职工创新补助资金项目(2021-30)

Application Effect of Rock Debris Geochemical Survey in Prospecting in Sandaowanzi Shallow Overburden Area,Heilongjiang Province

Yupeng ZHANG1(),Dongyan SHI2,3,4,Mingqi LV1,Chenglu LI1(),Kun ZHANG2,Wei TANG1   

  1. 1.Heilongjiang Institute of Natural Resources, Harbin 150036, Heilongjiang, China
    2.Heilongjiang Mining Group Co. , Ltd. , Harbin 150090, Heilongjiang, China
    3.College of Earth Sciences, Jilin University, Changchun 130061, Jilin, China
    4.Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, Guizhou, China
  • Received:2021-12-01 Revised:2022-05-29 Online:2022-10-31 Published:2022-12-10
  • Contact: Chenglu LI E-mail:yupeng0310@163.com;lcl230881@163.com

摘要:

黑龙江省三道湾子地区是我国典型的浅覆盖区,也是重要的金多金属成矿集中区,区内已发现三道湾子、北大沟、纳金口子、340高地和三道湾子南山等10多处金矿床(点),找矿潜力巨大。区内开展了多次土壤地球化学测量工作,但尚未取得找矿突破。通过在研究区开展多种采样网度、粒级和层位的对比试验,确认了最佳的化探采样方法,即采用50 m×50 m网格化的岩屑地球化学测量技术方法。在对区内地球化学特征和元素共生组合特征等进行相关分析的基础上,结合区域成矿地质条件,圈定出综合异常30处,主成矿元素Au、Ag在有利构造部位强烈富集。通过异常查证,新发现金、银矿体12条,金矿体23条,并圈定出3个找矿远景区,找矿效果良好。研究表明:在三道湾子地区开展岩屑地球化学测量,能够快速、准确地圈定矿化蚀变范围,提高找矿效果,是行之有效的找矿方法,可为同类型森林沼泽地球化学景观区内找矿工作提供重要参考。

关键词: 浅覆盖区, 岩屑地球化学, 异常查证, 找矿远景区, 三道湾子地区, 黑龙江省

Abstract:

The Sandaowanzi area is a typical shallow overburden area which hosts numerous gold polymetallic ore deposits in Heilongjiang Province,China.More than 10 gold deposits and ore occurrences have been found in the area,such as Sandaowanzi gold deposit,Beidagou gold deposit,Najinkouzi gold deposit,340 highland gold deposit,Sandaowanzi Nanshan gold deposit,etc.,with great prospecting potential.Many soil geochemical surveys have been carried out in the area,but no prospecting breakthrough has been made.Through the comparative tests of various sampling grids,grain sizes and horizons in the study area,the best geochemical sampling method was confirmed,and the 50 m×50 m gridded rock debris geochemical survey method was adopted.Based on the correlation analysis of geochemical characteristics and element symbiotic assemblage characteristics,and combined with regional ore-forming geological conditions,30 comprehensive anomalies were delineated.The main ore-forming elements Au and Ag are strongly enriched in favorable structural areas.Through anomaly verification,12 gold-silver orebodies and 23 gold orebodies have been found,and 3 prospective areas have been delineated,and good prospecting results have been obtained.The study shows that rock debris geochemical survey in Sandaowanzi area can quickly and accurately delineate the range of mine-ralization alteration and improve the prospecting effect,which is an effective prospecting method.It can provide an important reference for ore prospecting in the same type of forest swamp geochemical landscape area.

Key words: shallow overburden area, rock debris geochemistry, abnormal verification, prospecting area, Sandaowanzi area, Heilongjiang Province

中图分类号: 

  • P618.51

图1

黑龙江三道湾子地区区域地质图1.第四系堆积物;2.孙吴组;3.光华组;4.龙江组;5.根里河组;6.泥鳅河组;7.裸河组;8.多宝山组;9.早白垩世二长花岗岩;10.早侏罗世二长花岗岩;11.早侏罗世石英闪长岩;12.石炭纪花岗杂岩;13.安山岩脉/安山玢岩脉;14.闪长岩脉/闪长玢岩脉;15.石英闪长岩脉/流纹岩脉;16.花岗细晶岩脉/花岗斑岩脉;17.地质界线/不整合地质界线;18.实测/性质不明断层;19.糜棱岩化;20.岩金矿/砂金矿;21.铜钼矿点;22.研究区"

图2

黑龙江三道湾子地区岩屑地球化学测量采样点位图"

表1

研究区各元素地球化学参数统计"

参数AuAgAsBiCuHgMnMoPbSbTeWZn
X21.30.08812.440.55520.90.138529.62.8730.61.370.4082.0951.9
Max30 843.0103.00868.0135.00930.030.40018 400255.002 025.0184.0016.1064.00507.0
Min0.10.0100.400.0101.70.001110.124.00.070.010.042.4
S1 954.200.7821.751.9252.800.56433.655.8636.673.050.615.7530.91
Cv91.808.901.753.472.534.070.822.041.202.231.482.750.60
Q23.661.605.183.700.800.020.655.742.047.580.073.480.68
T8.90.14441.901.32035.50.2801514.07.3856.24.471.3804.25116.7

表2

因子分析正交旋转因子载荷矩阵"

因子lgBilgPblgTelgMolgAslgSblgHglgWlgAulgAglgCulgZnlgMn解释方差累计/%
F10.8460.7420.6100.5870.0700.0140.139-0.0610.1440.2900.194-0.470-0.50120.20
F20.1030.0040.5340.0530.8330.7970.7500.0980.2150.068-0.013-0.208-0.24438.30
F30.0840.0950.1420.4760.2690.355-0.1420.8080.7230.6400.106-0.0210.02554.29
F4-0.081-0.057-0.1380.0030.005-0.060-0.2450.0280.119-0.0170.8560.7580.66168.53

图3

正交旋转因子载荷"

图4

R型聚类分析谱系"

图5

黑龙江三道湾子地区F3因子得分及地球化学综合异常图1.金矿体;2.金矿点/铜钼矿点;3.金银铜矿点/金银矿点;4.工作区;5.综合异常;6.远景区"

表3

地球化学综合异常评序结果"

编号面积/km2ΣNAP主成矿元素种数异常数成矿条件序次评价
Ht-015.64139.58Au、Ag、As、Hg、W13368极有利1矿体引起的异常
Ht-165.91820.77Au、Ag、As、Sb、Bi12297极有利2热液(蚀变)引起的异常
Ht-105.00219.71Hg、Te、Bi、As、Sb11202极有利3热液(蚀变)引起的异常
Ht-173.80413.69Au、Mo、Cu、Pb10116较有利4矿体引起的异常
Ht-130.4102.19Au、Bi、Ag、Sb930极有利5矿体引起的异常
Ht-150.7512.07Ag、Pb、Zn、Bi、Cu950有利6异常成因不明
Ht-270.1393.27Au、Ag、Sb、Pb、Bi918极有利7矿体引起的异常
Ht-060.7211.12Sb、Hg、Au、As、Pb1037有利8异常成因不明
Ht-260.1632.29Ag、Pb、Hg、Sb、As713极有利9蚀变矿化引起异常
Ht-300.2512.07Au、Ag、Sb、Cu、W720极有利10矿体引起的异常

表4

综合异常查证结果"

异常编号见矿情况矿体特征矿石/围岩矿物成矿类型
Ht-26矿体13条Ⅰ1斜厚0.4 m,Au品位282.43×10-6石英脉/安山玢岩黄铁矿、碲金矿、黄铜矿碱性岩型低温热液型
Ht-24矿体7条Ⅱ3斜厚8 m,Ag品位74.2×10-6、Cu品位0.74%蚀变岩/安山岩黄铁矿、黝铜矿、重晶石高硫化低温热液型
Ht-27矿体3条Ⅱ8、9斜厚1 m,Au品位1.41×10-6、1.01×10-6蚀变岩/安山岩黄铁矿、黄铜矿、碳酸盐高硫化低温热液型
Ht-16金矿体1条Ⅸ斜厚28 m,Au品位1.2×10-6蚀变岩/安山岩浸染状黄铁矿低温热液型
Ht-22银矿体1条宽2 m,Ag品位130.77×10-6蚀变岩/安山岩辉锑矿、黄铁矿低温热液型
Ht-01矿体10条Ⅲ1斜厚3.65 m,Au品位6.04×10-6石英脉/安山玢岩黄铁矿、碲金矿、方铅矿构造—热液叠加型
Ht-01金矿体2条均斜厚2 m,Au品位11.22×10-6、Ag品位5.07×10-6石英细脉/安山岩黄铁矿、自然金中低温热液型
Ht-01金矿体4条Ⅳ1斜厚3 m,Au品位1.19×10-6、Ag品位64.06×10-6石英脉/安山岩黄铁矿、碲银矿、方铅矿构造—热液叠加型
Ht-13金矿体1条Ⅵ斜厚6 m,Au品位6.05×10-6石英脉/变质岩黄铁矿、磁铁矿、黄铜矿构造蚀变岩型
Ht-10金矿体1条斜厚1 m,Au品位1.05×10-6、1.14×10-6蚀变岩/安山岩浸染状黄铁矿低温热液型
Ht-19金矿点Au品位2.9×10-6石英脉/安山岩黄铁矿低温热液型

图6

钻孔中矿石标本及矿化蚀变特征(a)石英脉型碲金矿体;(b)、(c)碱性岩型金矿体;(d)蚀变岩型金矿体;(e)、(f)高硫化型金矿体;(g)、(h)、(i)构造—热液叠加型金矿体Qz-石英;Prop-青磐岩;Carr-碳酸盐;Py-黄铁矿;Hes-碲银矿;Cve-碲金矿;Thr-黝铜矿;Ng-自然金;Ro-菱锰矿"

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