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Gold Science and Technology ›› 2022, Vol. 30 ›› Issue (5): 651-663.doi: 10.11872/j.issn.1005-2518.2022.05.173

• Mineral Exploration and Resource Evaluation •     Next Articles

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

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

CLC Number: 

  • P618.51

Fig.1

Regional geological map of the Sandaowanzi area in Heilongjiang"

Fig.2

Location map of sampling points for rock debris geochemical survey in the Sandaowanzi area in Heilongjiang"

Table 1

Statistics of geochemical parameters of elements in the study area"

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

Table 2

Orthogonal rotation factor loading matrix of factor analysis"

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

Fig.3

Orthogonal rotation factor loading"

Fig.4

R-type cluster analysis pedigree"

Fig.5

F3 factor score and geochemical comprehensive anomaly map in the Sandaowanzi area in Heilongjiang"

Table 3

Evaluation results of geochemical comprehensive anomaly"

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

Table 4

Results of comprehensive anomaly verification"

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

Fig.6

Ore specimens and mineralization alteration characteristics in borehole"

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