Highlights

  • Coronado Global shares fell 12.499% to AUD 0.315 on 5 January following disclosure of a fatal mine incident.
  • A worker was fatally injured at the Mammoth Underground Mine within the Curragh Mine complex in Queensland.
  • Underground operations remain suspended, while open-cut mines have resumed production after a brief halt.

Coronado Global Resources Inc. (ASX:CRN) shares fell sharply on 5 January, despite a significant rise over the past six months, after the company confirmed a fatal incident at its Mammoth Underground Mine in Queensland. The event has led to the suspension of underground operations while investigations continue.

Share Price Movement Draws Market Attention

CRN shares were trading at AUD 0.315, down AUD 0.044 or 12.499% for the trading session. While the stock has gained 96.88% over the past six months, it remains 58.55% lower compared with its level a year earlier. The decline came as the company disclosed details of an operational incident at one of its Queensland mining assets.

Fatal Incident at Mammoth Underground Mine

The company reported that an incident occurred at approximately 3:00pm AEST on Friday, 2 January 2026, at the Mammoth Underground Mine, located around 10 kilometres north of Blackwater in central Queensland. Confirmation was received the following day that a contracted worker had suffered fatal injuries.

Coronado stated it is providing support to the contracted mine operator, Mammoth Underground Mine Management Pty Ltd, which is working alongside relevant authorities to determine the circumstances surrounding the incident. Operations at the Mammoth Underground Mine have been suspended until further notice.

Operational Impact Across Curragh Mine Complex

In response to the incident, operations at Coronado’s Curragh North and Curragh South open-cut mines were temporarily idled for 24 hours. These sites have since recommenced activities through a staged return to normal operations.

The Curragh Mine complex is one of Coronado’s key assets in Australia, producing metallurgical coal for international steel markets. The company confirmed that the underground suspension does not currently extend to its open-cut operations.

Company Response and Ongoing Review

Coronado acknowledged the seriousness of the incident and stated that it is cooperating fully with regulatory authorities. Investigations into the cause of the event remain ongoing, with further updates expected as assessments progress.

The company has not provided a timeline for the resumption of underground operations at Mammoth, noting that activity will remain paused while reviews are completed.