滇西北衙金多金属矿区万硐山矿段KT44矿体特征及找矿前景

KT44 ore body characteristics and prospecting potentials in Wandongshan Ore Section of Beiya Gold Polymetallic District,western Yunnan

北衙金多金属矿床为金沙江—哀牢山富碱斑岩成矿带内典型的与富碱斑岩有关的矽卡岩型—斑岩型金多金属矿床,矿床规模已达超大型。万硐山矿段是北衙金多金属矿区的重要矿段之一,KT44矿体为该矿段内的主矿体之一,其金金属量已超过20 t。前期认为KT44矿体是产于层间破碎带的缓倾斜矿体,随着剥采工作的进行,现认为该矿体产于F 6断裂破碎带中,向西陡倾,近于直立,沿走向及倾向均未得到控制。通过对KT44矿体特征的梳理,结合对矿段地质特征及控矿因素的总结,认为KT44矿体向深部、沿F 6断裂走向及倾向具较大找矿潜力,有望实现找矿突破。

Beiya Gold Polymetallic Deposit is a typical skarn-porphyry type gold polymetallic deposit related to the alkali-rich porphyry in the Jinshajiang-Ailaoshan alkali-rich porphyry metallogenic belt.The deposit scale has reached a super large scale.Wandongshan Ore Section is one of the important ore sections of Beiya Gold Polymetallic District.The KT44 ore body is one of the main ore bodies in this section,and its gold metal content has exceeded 20 t.Earlier,it was believed that the KT44 ore body was produced in moderately inclined ore body in the interlayer fragmentation zone.With the progress of stripping work,it is now believed that the ore body is produced in the F 6 fracture zone,with a steep incline to the west and nearly upright,and is not controlled along the strike and tendency.By summarizing the characteristics of the KT44 ore body and the geological characteristics and ore-controlling factors of the ore section,it is believed that the KT44 ore body still has a great prospecting potential in the deep and along strike and tendency of F 6 fault,where it is expected to achieve a prospecting breakthrough.