2) Paleozoic Sn-polymetallic province in the northern accretionary zones of the craton, where Pb-Zn and Sn-polymetallic deposits were formed in Paleozoic basins with extensional tectonic background.

• 2）大兴安岭中南段古生代锡-多金属成矿省，在克拉通北缘早/晚古生代增生带的张裂型沉积盆地内分别生成各具特征的铅锌/锡-多金属矿床。