上黑龙江成矿带水系沉积物地球化学特征及含矿性浅析

上黑龙江成矿带位于大兴安岭北部,是黑龙江省重要的金及多金属勘查基地。以1∶20万水系沉积物测量数据为基础,对其成矿元素地球化学特征进行初步分析,并对各地质单元含矿性进行初步探讨。通过对成矿元素的分布特征、相关性分析,Au总体丰度值高,后期变异强度大,为区内主攻矿种,其次为Ag元素;Au与As、Sb相关性较好,二者可以作为金矿找矿的指示元素;区内重要的赋矿地层为中侏罗统二十二站组和下白垩统甘河组,为下步金矿找矿工作的重点部位。

Geochemical characteristics and ore-bearing potentials in Upper Heilongjiang Metallogenic Belt based on stream sediment survey

Located in northern Great Khingan Mountains , Upper Heilongjiang metallogenic belt is an important gold and polymetallic exploration target .Based on the 1:200000 stream sediment survey ,the paper made a prelimina-ry analysis on geochemical features and discussion about gold ore in each geologic unit .Through study of element dis-tribution features and correlation analysis ,the paper thinks overall content value of gold is high with a large late varia-tion intensity;gold is the main mineral resource in the region followed by Ag; Au is well correlated with As and Sb which makes them good indicator elements for gold prospecting;Both Jurassic clastic rocks of the Ershi 'erzhan forma-tion and lower Cretaceous volcanic rocks of the Ganhe formation were regarded as important prospecting targets in the next stage of work .