The Langkou potash feldspar deposit is one of potash feldspar deposits of weathering type of megaporphyritic medium-coarse grain hornblende biotite adamellite found within Fujian Province in recent years.

• 沙县琅口钾长石矿是近年来福建省发现的巨斑状中粗粒角闪黑云二长花岗岩风化型钾长石矿床。