Jiangfeng magnetite ore deposit locates in south of Menglong county in Jinghong city, Yunnan prov-ince. Strata in this ore district is mainly lower Damenglong Formation, Proterozoic, and Menghai granite body is developed. Based on the analysis of engineering dxploration, we conclude that the Jiangfeng magnetite ore body belongs to a large ore deposit. The deposit can be divided into Jiangfeng and Hongshao ore sections. This paper only discusses the Jiangfeng ore section. By means of drilling, field logging, data treatment, sample analysis and regional comparison, we discover that primary magnetite ore deposit is hosted in the metamorphic series where diopside skarn developed. The specific location is the second (Ptdm1-2) and third (Ptdm1-3) layer of the lower sec-tion of Daxulong Formation. The ore bodies, most stratiform-like, are basically consistent with strata. The results of rock-mineral identification show that the deposit is closely related with the volcano sedimentary and hydrother-mal contact. Conclusion demonstrated that iron ore source layer in Early Proterozoic experienced complicated re-gional metamorphism and Hydrothermal metasomatism from acid igneous rock, and during this process iron sepa-rated out. Skarn type magnetite deposit then enriched in favorable topographic position.

在一些地质较为复杂的地区中,加上受到计算方法的限制,矿坑涌水量预测的方法一直是国内外研究的难点,在一些中小型的矿区,还可能会受到地质勘查条件的影响,矿坑涌水量预测格外困难。在设计中,通常情况下都会使用钻孔简易水文地质观测法,但一些施工人员却无法真正认识到其的意义,而且由于监管的不到位,使得很多矿坑都失去了原本的应用价值。本文主要结合实例,介绍了矿坑涌水量预测的主要方法,并对这些预测方法和矿坑涌水量进行了证实,以供参考。

我国资源幅员辽阔,各种金属分布十分广泛。特别是在我国西南地区,蕴含着十分丰富的锡矿资源。不仅具有广泛的锡矿矿床和多金属矿矿床,其分布类型也十分复杂。其形成不仅受到花岗岩进入岩体造成影响,同时地质构造、区域地层等也是其形成的重要影响因素。本文将对锡矿的地质背景以及分布特征与矿床特征进行分析,并提出其矿床成因与矿化规律,规划出一套科学的找矿模式。