Sundance Resources has called a trading halt in its shares amid speculation that its takeover by China's Hanlong may be delayed yet again.

Media speculation suggests a revised March 26 deadline for credit approved term sheets from Hanlong's financiers, China Development Bank and Everbright, may be missed.

Earlier this month, the Chinese suitor injected $5 million cash into its Perth-based iron ore target to bolster its balance sheet while the transaction was completed.

The Hanlong takeover, which is centred on the Mbalam project in West Africa, has suffered ongoing delays since it was announced in October 2011.

Hanlong's 45-cents-a-share offer values Sundance at $1.4 billion.

However Sundance shares last changed hands for just 21 cents, suggesting investors are dubious the deal will go ahead at the 45-cents-a-share offer price.