豫西熊耳山Ag、Ag-Pb、Au、Mo及Pb矿床 (点)的空间分布特征及找矿启示

对豫西熊耳山121个Ag、Ag-Pb、Au、Mo及Pb矿床(点)的空间分布特征进行了分析,并在此基础上探讨了熊耳山地区找矿潜力区。在经度方向上,它们集中于熊耳山的东、西两端,而在中部(111.45°~111.50°和111.60°~111.65°)出现两个矿床频数低值;在纬度方向上,矿化主要集中分布于34.10°~34.25°的中部地带。121个矿床(点)的高程(采矿平硐海拔高度)集中分布于600~750 m、800~1 050 m和1 100~1 200 m三个高程区间内,熊耳山东、西两端大型Ag-Pb、Au和Mo矿床的高程大致相当。121个矿床(点)组成了6条矿化种类各异和走向不同的矿化条带,分别为近NW向的Ag及Ag-Pb矿化条带(M1)和Au(Mo、Pb)矿化条带(M3)、近NE向的Au(Mo、Pb)矿化条带(M2)、近EW的Pb-Au(Mo)矿化条带(M4)、近NNW向的Au矿化条带(M5)和近NS向的Au(Mo、Pb)矿化条带(M6),其走向均与区域以及矿床控矿构造的走向大致相当。121个矿床(点)在空间三个投影面中均遵循分形丛集分布,并且存在两个无标度网格区,显示了多重分形的特征,发现熊耳山矿集区的分布具有约10 km等间距的特征,并结合透岩浆流体成矿理论对熊耳山地区进一步的成矿潜力区进行了分析。

Spatial distribution features of Ag, Ag-Pb, Au, Mo and Pb deposits (mineralization spots) in Xiong'er Mountain, western Henan Province, and their implicatiotion for prospecting

Spatial distribution features of 121 Ag, Ag-Pb, Au, Mo and Pb deposits (mineralization spots) in the Xiong'er Mountain were analyzed, and their implications for prospecting were discussed. Most of them lie in east and west parts of the Xiong'er Mountain in longitude direction; however, there are two sections (111.45°~111.50° and 111.60°~111.65°) that display the lower frequency deposit (mineralization spot) locations in middle Xiong'er Mountain. In latitude direction, most of deposit (mineralization spot) locations are clustered in the middle part (34.1°~34.25°). The altitude values of 121 deposits (mineralization spots) (altitude of mining adits) fall into three altitude ranges, i.e., 600~750 m, 800~1 050 m and 1 100~1 200 m, and the altitudes of large Ag-Pb, Au and Mo deposits located in east and west parts of the Xiong'er Mountain process the similar altitude range. Six mineralization belts with different strikes and mineralization types are composed of 121 deposits (mineralization spots), the Ag and Ag-Pb belt (M1) and Au (Mo, Pb) belt (M3) strike NW, the Au (Mo, Pb) belt (M2) strikes NE, the Pb-Au (Mo) belt (M4) strikes EW, the Au belt strikes NWW (M5) and the Au (Mo, Pb) belt (M6) strikes NS. Strikes of six mineralization belts are consistent with regional faults. The spatial distribution of 121 deposit (mineralization spot) locations show bi-fractal clustering characteristics with two non-scale ranges. Equidistant feature of ore concentration areas in the Xiong'er Mountain was found, and the distance is about 10 km. On the basis of transmagmatic fluids theory, the potential prospecting targets in the Xiong'er Mountain were discussed.