黑龙江省佳木斯地块北缘金矿资源潜力超低密度的地球化学预测

在黑龙江省森林沼泽景观区大面积开展超低密度地球化学调查尚属首次，针对森林沼泽景观区有机质及硅胶含量高的特点，此次工作采样介质采用泛滥平原沉积物表层--A层土，采样密度为1样／100km²，溶矿剂采用四酸(HCl+HNO₃+HF+HClO₄)溶矿法。四酸溶矿法可咀将有机质及硅皎所吸附、包裹的金属释放出来，从而能够有效地发现异常。在较短的时间内快速掌握了全区70000km²范围内的Au、As、Sb、Hg、Ag、Pb、Zn、Bi、Cu、Co、Cr、Ni、U、Mo、W等15种元素的含量分布特征，并研究了该区超低密度地球化学异常特征．所圈定的地球化学块体及区域异常与已知的成矿区(带)吻合较好，同时又发现了几处新的地球化学块体和区域异常。运用超低密度地球化学调查方法，对佳木斯地块北缘乌拉嘎金地球化学块体的金矿资源潜力进行了预测。

ULTRA-LOW DENSITY GEOCHEMICAL EXPLORATION ABOUT GOLD DEPOSIT RESOURCE IN THE NORTHERN JIAMUSI BLOCK OF HEILONGJIANG PROVINCE

To launch the ultra-low density geochemical survey at of Heilongjiang Province still belongs to the first time by a large scale. That focuses on the characteristics of the organic matter of the forest marsh landscape district and silica gel of high content.The medium of sampling of this job adopts the sedimentary top layer of flood plain,that is the one layer of soil of A, sample density is a sample/100km~2, dissolving ore pharmaceutical adopts four acid solution(HCl-HNO_3-HF-HClO_4). We quickly grasped the characteristics of 15 elements, such as Au,As,Sb,Hg,Ag,Pb,Zn,Bi,Cu,Co,Cr,Ni,U,Mo,W contents in 70000 km~2 area, and studied this district's ultra-low density geochemical anomalies characteristic, drawn a circle to approve geochemistry block and area identical and better with known metallogenic district, found several new geochemistry blocks and anomay areaes at the same time. We forecasted potential of gold mine resource in Wulaga Au geochemical block in the north of Jiamusi block by using the method of ultra-low density geochemical survey.