矿金矿的成矿作用，是在表生（常温、常压）环境中的外营力作用下完成的。成矿作用始于河谷侵蚀回旋初期，而完成于河谷侵蚀旋回末期。在自然界中，每天河谷都是一个天然的“溜槽”。含金的风化侵蚀产物，在这些天然“溜槽”中，昼夜不停的在运动，进行着搬运、分选、淘汰、沉积，最后在其有利地段形成砂金矿床。金粒作为碎屑物之一与其它风化侵蚀产物一起进入沟谷后，在流水的作用下，这些碎屑物不停的被冲刷、搬运和分选。众所周知，金粒在表生条件下的化学性质是稳定的（显粒金），相对密度局岩石、矿物之首（1536-18.3），颗粒细小（一般为0.1-1.0mm），因此在流水的作用下，就显示出与其他岩石、矿物碎屑不同的特点。
The mineralization of gold ore, is in the surface (normal temperature and pressure) forces completed under the environment. Mineralization began at the early stage of the erosion of the river valley, and was completed in the end of the valley erosion cycle. In nature, every valley is a natural "". Gold bearing weathering erosion products in these natural "chute", around the clock in motion, handling, sorting, eliminated, deposits, and finally in the favorable area for the formation of placer gold deposits. Gold particles as one of debris and other weathering erosion products together into the valley after, in the role of water and the debris does not stop is erosion, transport and sorting. Well known, the gold particles in the table under the condition of the chemical properties are stable (grains of gold), relative density board for the rock and mineral (1536-18.3), fine particles (usually 0.1-1.0mm). Therefore in the role of water, will display the characteristics different from other rocks and minerals.
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