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粤西大沟谷一带钢长石岩主要以层状、透镜状及脉状产于震旦系乐昌峡群变质片岩中，具块状及条带状构造，是大沟谷金矿的主要赋矿岩石。钠长石岩富Na、St、Al、Mg、Mn、K，在微量元素方面富An、As、Sn、B、Cu、Ni、Co、Ph、Zn，稀土元素的含量较低，配分模式为平缓右倾曲线。矿物组合及铁白云石碳、氧同位素组成特征与秦岭地区热水沉积钠长石岩的基本相同。据大沟谷钢长石岩的地质地球化学特征认为钠长石岩是热水沉积的产物。
The feldspathic rocks in the western part of the western Guangdong are mainly layered, lenticular and vein-shaped in the metamorphic schist of the Lechang Gorge Group in the Sinian, with massive and banded structures, and are the major fossils of the Grand Valley Gold Mine Mine rock. The albite is rich in Na, St, Al, Mg, Mn, K and has a small content of trace elements such as An, As, Sn, B, Cu, Ni, Co, Ph, Zn and rare earth elements Right curve. The mineral assemblages and iron dolomites have the same carbon and oxygen isotopic compositions as the hydrothermal sedimentary albite in the Qinling area. According to the geo-geochemical characteristics of the Grand Gulch feldspar, albite is believed to be the product of hydrothermal deposition.