Gary P. Landis Albert H. Hofstra 2013 Burlinson (2013) questions the veracity of the H₂ concentrations reported for fluid inclusion extracts from minerals in the Idaho cobalt belt (Table 2; Landis and Hofstra, 2012) and suggests that they are an analytical artifact of electron-impact mass spectrometry. He also declares that H₂ should not be present in fluid inclusions because it is invariably lost by diffusion and is never detected in fluid inclusions by laser Raman. We welcome this opportunity to reply and maintain that the reported H₂ contents are accurate. Below we explain why Burlinson’s criticisms are invalid. application/pdf 10.2113/econgeo.108.5.1213 en SEG Ore genesis constraints on the Idaho cobalt belt from fluid inclusion gas, noble gas isotope, and ion ratio analyses--a reply article