四川已知有砂金矿床约30处，矿点200余处，民采点数百处，是我国主要的砂金产区之一。

Sichuan Province is one of the placer gold producing areas in our country, Over the whole province there are about 30 gold placers and more than 200 mineral occurrences.

砂金中的微量铅同位素分析具有特殊的意义。

The isotope analysis of minim lead in the gold dust has special meaning.

溶蚀系数可指示砂金是近或远原生源金矿。

The coefficient of dissolution can indicate the source of placer gold.

使金重新分布，砂金分布与金源、地貌和新构造运动关系密切。

Distribution of gold placer deposits is closely related with gold-bearing horizon, morphology and tectonism.

文中通过对于黑龙江省呼玛河北部地区前寒武系砂金资源总量予测逻辑信息法的计算结果分忻，研究了该方法的地质效果。

Geological effects of the method have been also studied by these calculating results through the method for prospecting gold-placer in the north of Huma county in Heilnogjiang province.