黑龙江省新林—呼中地区水系沉积物地球化学特征及找矿意义

在新林—呼中地区森林沼泽-冻土景观区,开展1∶50 000水系沉积物测量,探讨该区水系沉积物中元素含量分布、元素组合特征和区域地球化学异常特征,为下一步划分成矿远景区,开展地球化学找矿提供依据。结果显示:该区具备中高温热液型Cu、Pb、Mo、Au多金属矿成矿条件;早白垩世二长花岗岩区和白音高老组火山岩区Cu、Pb、Zn、Mo、Au显著富集,强烈分异,是寻找Pb、Cu、Mo、Au多金属矿化(床)的有利地段;区域异常与燕山早期酸性侵入体密切相关,应是晚侏罗世—早白垩世岩浆侵入、喷发以及构造运动强烈作用的结果。

Geochemical characteristics of stream sediments in Xinlin-Huzhong area of Heilongjiang Province and their prospecting significance

Based on the 1∶50 000 stream sediment survey of the forest-swamp landscape in Xinlin-Huzhong area.The paper investigated the element distribution,characteristics of element association and characteristics of regional geochemical anomalies to divide mineralization prospect areas and provide evidence for geochemical exploration.The results show the area bears favorable metallogenic conditions for medium-high hydrothermal Cu,Pb,Mo and Au polymetallic deposits;Cu,Pb,Zn,Mo and Au are evidently enriched and differentiated in Early Cretaceous monzogranite and volcanic rocks in Baiyingaolao Formation,making them favorable sections for Cu,Pb,Mo and Au polymetallic mineralization(deposits);the regional anomaly is closely related to early Yanshanian acidic intrusions and supposed to be the outcome of the late Jurassic-early Cretaceous magmatic intrusions,eruptions and intense tectonic activities.