Lacklustre performances by small mining companies on the London Stock Exchange are driving rivals in need of cash to find alternative ways to raise capital.
The current debate surrounding coal is generally one of how long it will continue to play a role in the world's energy mix before it is replaced by cleaner alternatives, but the coming years may see a deficit in seaborne markets for the polluting fuel.
Fortescue Metals Group reported slight rise in fiscal first-quarter iron ore shipments, also warned its ore was selling at a greater discount than expected.
Australian politicians told China of government approvals for controversial A$16.5-billion ($13-billion) coal mine project being built by Adani Enterprises.
Teck expects larger proportion of coal sales in fourth quarter to be non-premium, reducing average realized price to about 85 percent of benchmark prices.
Goldcorp reported 88 percent rise in quarterly profit, helped by increase in company's income tax recovery and higher earnings from its Peñasquito mine.
Gold producer says its total gold output from mines fell to 522,917 oz in the quarter ended Sept. 30 from 615,498 oz in the same period a year earlier.