多拉金矿田次生晕基本特征及找矿方向的研究

多拉金矿田中,金及其他指示元素次生晕很发育,各元素次生异常明显呈线形.主要元素组合为Au-Pb-Zn-Bi-As,其中Au、Pb和Zn为最近程指示元素,Au和Pb、Zn异常空间吻合很好,并能直接反映原生金矿化的存在.结合Pb、Zn和Au等次生异常浓集中心的分布及对控晕控矿主要因素的初步研究,认为在矿田内继续找到新的较大规模的工业矿床大有希望.并优选出几个靶区.

STUDY FOR PRINCIPAL CHARACTERISTICS OF SECONDARY HALO AND EXPLORATION ORIENTATION OF DUOLA GOLD FIELD

There are extensive and intensive Secondary anomalies of gold and other indicator elements in Duola gold field. These anomalies are obviously linear. Main association of elements is as Au-Pb-Zn-Bi-As, of which the best near distance in-dicator element include Au, Pb and Zn. Spatial distribution of Au anomaly corresponds to that of Pb and Zn, which shows directly the occurence of gold primary mineralization. On the basis of studies for the concentration centres of the secondary anomalies of Pb, Zn and Au, and the main factors controlling the anomaly and mineralization, we recognize that it is feel hopeful of finding out new large scale economic ore deposits in the field. Some targets are chosen, and some opinion of enginee-ring of exploration is put up.