folded system

Gold prospecting in Da Xing'anling geosynclinal folded system,China;

大兴安岭地槽褶皱系岩金找矿远景分析

The ore-formation of wolfram in Qilian fold system is closely related to the old blocks which are abundant in wolfram and provided part of wolfram for the formation of ore deposits.

祁连褶皱系钨成矿与老地块密切相关,这些老地块富钨,为成矿提供了部分物质来源。