Comparative studies have been conducted on the macroelement, microelement and REE geo-chemical characteristics of the Laowanchang lateritic gold deposit and its related rocks and/or ores and karst laterite in Qinglong county, southwestern Guizhou. The studies indicate that the material source of this type of lateritic gold deposit is Au-rich rocks and /or ores with high siliceous material (quartz SiO2) and rich ferruginous material (pyrite etc. ). The deposit is very similar to the Carlin type gold deposit with respect to the Au-As-Sb-Hg-Tl-W-Ag-Ba microelement association. So it is considered to be the product of wealthering evolution of a primary Carlin type gold deposits. Macroelement and REE geochemical studies indicate that ores of this lateritic gold deposit the possess mixed features of the weathering product of a primary Carlin type gold deposit and karst laterite. The ore-forming process is as follows: the Carlin type gold deposit overlying the limestone of the Early Permian Maokou Formation collapsed and piled up in an ore-holding system with a negative karst landform during karst processes; then the primary orebodies were weathered and soil was formed, accompanied by karst lateritization. Karst lateritization imparted the features of laterite to the ores and also lowered the gold ore grade of the primary gold deposit.