塔吉克斯坦阿尔登-托普坎矿区大斑晶结构花岗闪长斑岩的成因浅析及对找矿的指示意义

Genesis of granodiorite porphyry with large phenocryst structure and its significance for ore prospecting

阿尔登托普坎矿区位于塔吉克斯坦北部,地理位置属于西天山支脉库拉明多金属成矿带。属于典型的矽卡岩型多金属矿床。在实际工作中发现花岗闪长质岩浆中有一类斑晶巨大,晶型完整的花岗闪长斑岩,其成因及成矿性明显区别于其他岩体。该斑岩体为成矿期后构造,破坏了矿体的原有格局,在走向及倾向两个方向切断了矿体,极易造成矿体尖灭的假象,对于矿体的连续性具有非常不利的影响。因此通过对该斑岩体的研究,不仅对于今后的找矿工作具有积极的意义,同时对于整个矿区的区域地质研究也具有非常重要的指导意义。

The ardentopukan mining area is located in the north of Tajikistan and belongs to the kulamin polymetallic metallogenic belt,a branch of the Western Tianshan Mountains.It is a typical skarn type polymetallic deposit.Its genesis and mineralization are obviously different from other rocks.The porphyry body is a post mineralization structure,which destroys the original pattern of the ore body,cuts off the ore body in two directions of strike and dip,which is easy to cause the false appearance of the ore body pinching out,and has a very adverse impact on the continuity of the ore body.Therefore,the study of the porphyry is not only of positive significance to the future prospecting work,but also of great guiding significance to the regional geological research of the whole mining area.