拉巴铜钼矿床地质特征及找矿前景分析

Geological characteristics and prospecting potential of Laba Cu-Mo Deposit

拉巴铜钼矿床位于义敦岛弧南段中甸地区,其成矿作用与燕山期中酸性岩浆活动密切相关。本文以拉巴矿区联办矿段为研究对象,从矿体特征、矿石组构和围岩蚀变特征三个方面对该矿床地质特征进行了详细的研究。认为矿体的空间展布主要受矿区地层、地质构造和岩浆岩的控制作用,初步提出矿床的成因为斑岩—矽卡岩型矿床,同时指出了该矿床的一系列找矿标志。结合区内燕山期大规模的Cu、Mo成矿作用和前人的物、化探研究资料,提出该矿床具有良好的找矿前景,对今后进一步的找矿工作具有一定的指示意义。

Laba Cu-Mo Polymetallic Deposit is located in the Southern part of the Yidun Arc,and its mineralization is associated with the Yanshanian period intermediate-acid magmatism.In this study,a detailed works are conducted on Lianban ore block from orebody characteristics,ore fabrics and the alterations of country rock to decipher the geological characteristics of Laba deposit.The distribution of orebody is obviously controlled by the mining area＇s stratigraphy,geological tectonic and magmatic rock.The preliminary conclusion has been drawn that Laba Cu-Mo Deposit belongs to porphyry-skarn deposit.At the same time,a series of clues for prospecting has been proposed.Combined with large scale Cu-Mo metallogenesis on Yanshanian in this region and previous data of geophysical and geochemical exploration,presenting that the Laba Cu-Mo Deposit has favorable prospecting potential,which is of some guiding significance for ore-prospecting work in the future.