REE Geochemistry of the Cretaceous lignite from Wulantuga Germanium Deposit, Inner Mongolia, Northeastern China

The Wulantuga Germanium Deposit (WGD), hosted in coal seams with Ge resources up to 1600 Mt, is located in the Shengli Coalfield in Xilingol, Inner Mongolia, China. Forty-two channel samples of Ge-bearing lignites of the No. 6-1 coal seam (Lower Cretaceous Bayanhua Formation) were collected and their REE compositions were analyzed by inductively coupled plasma mass spectrometry (ICP-MS). The modes of occurrence of REE in selected lignite samples...