Primary Halo Characteristics And Prediction Of Deep Ore Prospecting In The Lou Li Gold Deposit

The Louli gold deposit is located in the volcanic tuff in the north side of Hongshan complex rock mass between the great fault of Handan and the mountain of Gushan and Zishan.It is located in the broken beam in Wuan depression of the junction of the two grade tectonic units of the North China platform,the Shanxi fault uplift and the North China fault depression.And the crustal movements occurred frequently.After many tectonic movements changes,such as Fuping-Caledonian-Haixi-Indo china-Yanshan tectonic movements,etc.The shallow crust tectonic and the magma activity is very strong.A series of north east to folds and fractures are formed.Copper and gold mineralization sites have been found in the area,and the metallogenic conditions are advantageous.The existing research results show that the background content of gold in the dark and meta-alkalescence biotite pyroxene syenite and other rocks in the later period of Yanshan magmatic evolution differentiation is higher.Becoming an important source of gold deposits in the area.This type of gold deposit is the first time in the southern segment of Taihang mountain,and ore controlling factors and deep mineralization potential need to be further improved.The study of metallogenic regularity and deep metallogenic potential has important guiding significance for the delineation of ore-forming prospective area and increasing the amount of mineral resources.In this article,the 17 elements(such as Au,Ag,Cu,Pb,Zn,Hg,Bi,Cd,As,W,Ba,Co,Cr,Mn,Mo,Ni,Sn)were studied by the correlation analysis,cluster analysis and factor analysis in the608 bedrock samples collected from the surface of mining area.Research shows the main metallogenic elements in the mining area are Au elements.There is a strong positive correlation between Au element and Hg,As elements.The correlation with Cd,W,Pb,Zn elements is weaker.The linear relationship with the rest of the elements is not obvious.Data analysis results show that the main indicator elements of the primary halo prospecting in mining area are Au,Hg,As.And The secondary directive elements are W,Sn,Mo and so on.Meanwhile,in this article the vertical elements zoning sequence of 137 core samples collected from four boreholes in the mining area was calculated by using Grigoryan's index method.Result display the vertical zoning sequence of the elements in the four boreholes is ZK11-2:Pb-AsCd-Zn-Mo-W-Mn-Co-Hg-Au-Ag-Bi-Ba-Ni-Sn-Cr-Cu;ZK16-1:Ba-Cu-Zn-Mn-Bi-Sn-MoCd-Pb-Co-Cr-Ni-W-Au-Hg-As-Ag;ZK54-1:Pb-Zn-As-Ag-Hg-Cu-Co-W-Sn-Mo-Au-Ni;ZK32-1:As-W-Au-Sn-Ag-Mo-Ni-Pb-Co-Cu-Zn.It is indicated that the ore body is formed by complex multistage and multi-stage processes and at least two more complete hydrothermal processes have been experienced.The vertical zoning law of primary halo shows that the sequence of elements appears "reverse zoning",according to the depth of ZK11-2,ZK32-1,ZK54-1 there was no higher content of frontal halo elements,so the possibility of blind ore appears in the deep part of the three gold ore bodies is smaller.There was a frontal halo elements association in the deep part of the ZK16-1,and the formation of gold ore bodies in the mining area is related to low temperature hydrothermal activity,it is indicated that the deep orebody of the borehole extends larger or still has blind orebody.